Document 3Nv8Jp0yrkLbXQoG4g7rJg3Ey

FILE NAME Manville JMA DATE 1941-1957 DOC JMA009 DOCUMENT DESCRIPTION Meeting Minutes - American Standards Association ASA Minutes of Committee on Allowable Concentrations of Toxic Dusts and Gases 37 Jan. 29 1941 Sept. 5 1941 Previous standards incl CO H2S CS2 benzene In process trichlorethylene perc formaldehyde methanol HF Many other defense industry chemicals considered for future standards Diethyl ether cadmium tetrachoroethane acetone 2000 ppm 3000 for 4 hours manganese 0.6 cum silica started arsenic 0.15 cum antimony CCI4 draft circulated to Dow Dup and other companies mercury 0.1 cum formaldehyde rev by Bames Sterner Dec. 11 1941 Ayides tetrachoroethane nitrous gases cadmium acetone diethyl ether Manganese xylene toluene Formaldehyde subcommittee Gray Barnes Whse Tebbens GE CC14 subcommittee von Oettinger Gray Irish Dow Low Westvaco Chromic acid and chromaste lead Lead Subcommittee Neal Harrold Chryser Kehoe Stratton Trichlor & perchlor subcommittee PI Drinker Low Westvaco Army & Navy reps Methanol subcommittee Schrenk later IHF McCord Chrysler Haggard Cranch Union Carbide Silica subcommittee Gardner Cummings Gray Hatch Lanza Neal 1942 Arsenic raised to 1.5 ppm nitrous gases Foulger said 50 ppm too high diethyl ether xylene formaldehyde HF Pb 0.15 mg perc toluene 1943 1945 Styrene draft prep by D. Irish Dow 400ppm Irish also said 100ppm CCI was ok formaldehyde 5-10 ppm Silica acrylonitrile trichlosethylene 200ppm Lengthy discussion of MAC's CC14 and trichlorethylene prev set at 200 ppm War standard being reviewed as an American Standard Silica Gardner Lanza radon fluoride and new substances to be considered 1947 1949 After Gardner's death Lanza chairs silica subcommitte methyl chloride-looks like 100ppm carbon tetrachloride standard awaiting results of research by Irish Dow committee declines to say if standard is for nausea or toxicity prevention and they go with previous recommendation 100 ppm Cd Mn nitroparaffins C12 welding fumes Be Drinker wanted to raise arsenic from 0.15 to at least 0.5 for arsenic trioxide Irish pushed through adoption of styrene war standard of 400 ppm as recommendation Xylene war standard adopted as ASA standard Styrene standard opposed as too high by full committee 5 opposed 3 not voting 1 ballot not returned Then they agreed there was not enough data to recommend a safe standard and agreed to recommend the American War Standard of 400 ppm as a tentative ASA standard Arsine discussed as highly toxic Still awaiting Irish's results on carbon tet Bowditch pushing for 50ppm Low Westvaco insisting 100ppm is safe Kehoe 1954 1955 June 20 1955 1956 recommended one standard for nausea another for disease Welding fumes fluorides nitromethane cyclohexanone radon silica cadmiun briefly discussed New subcommittee on chlorine sulfur dioxide Bloomfield recommends another dozen chemicals for review Lots of comments on lead compounds submitted by Bowditch with names of some authors and others comments anonymous Carbon monoxide hydrogen sulfide carbon disulfide benzene cadmium and compounds manganese and compounds chromic acid and chromates mercury and inorganic compounds arsenic and arsine Elkins & corporate rep suggested for subcommittee toluene and xylene uncomfortable at 200 ppm but not unsafe lead committee Bowditch Foulger Hazard Kehoe Elkins Pinto oxides of nitrogen styrene 100 ppm as comfort level formaldehyde still recommending 10 ppm despite discomfort and sensitization risk carbon tetrachloride methyl chloride trichlorethylene acrylonitrile silica cyclohexanone cyclohexane cyclohexanol cyclohexanone nitropropane Kehoe subcommittee Radium chorine 2 ppm fluorides glycols nitromethane sulfur dioxide Decided to recommend standards based on health effects and optionally comment on comfort levels for same substance below those levels known to cause health effects Cadmium oxide fumes 0.1 mg meter No progress on a number of items including lead Stokinger involved both here and on TLV committee he was also in 1954 Possible benzene committee Elkins Fairhall Gerarde Dow Greenburg Sands Schrenck IHF Possible cadimium dust committee Baetjer Gurney Hardy Irwin Prince Considered for chronic chromates Baetjer Machle Nelson Suggested for arsenic Gray Morse Nelson Pinto Spolyar Methanol Cranch Elkins Foulger or Mcallister McCord Schrenk Acrylonitrile Bradleylor Shaffer Amer Cyanamid McCormick Goodrich someone from DuPont and Union Carbide Suggested for fluorides Hodge Irwin Largent Nelson Stokinger Suggested for sulphur dioxide Amdur Greenwald Nelson Pinto or Abersold Treon Evans DuPont Butadiene rejected as merely an explosion hazard Beryllium suggested Eisenbud Foreman on Shipman Hardy Schepers Sterner Kodak Williams Maximum allowable concentration changed to maximum acceptable concentration Yant selected as new chairman Proposed forward The meaning of Maximum Acceptable Concentrations Says ill effects only for hypersensitive individuals Similar to preface for Threshold Limit Values first published in 1953 Carbon tetrachloride submittal of proposed standard from USPHS endorsing sponsor liason was Stokinger Formaldehyde and McCord quibbled over whether 10 ppm was acceptable or maximum acceptable concentration Allergic reactions dismissed as covered by preamble language about hypersensitive people Oxides of nitogen ppm questioned by Bureau of Mines representative Foulger objected to a 50 ppm limit for 3-5 minutes as too high Referred back to Stokinger and subcommittee Benzene lowered from 100 ppm to 25. Methyl chloroform was most often sold containing inhibitors but the group didn't want to even consider mixtures which could be different and proprietary for each manufacturer Methyl committee agreed on MAC of 20 ppm but Stokinger thought 30 would be okay Chromic chromates c.m suggested for nasal perforation hazard and Nelson recommended a statement that this was not intended as protection from lung cancer Lead-0.2 c.m for metallic lead and most lead compounds Some discussion of lead silicate Acetylene tetrabomide mentioned paradichlorobenzene 75 ppm recommended because the pain level was over 80 ppm Irish Dow Hatch said highest silicosis dust risks should have a limit of 2 MPPCF Other discussion on stepwise MAC's based on free silica content Lanza and Drinker reports considered Sponsorship individual standard had a sponsoring organization outside ASA Autonomous standards committee set up in 1938. Bowditch suggests inviting USPHS and Dept. of Labor Schrenk suggests American Industrial Hygiene Association Cralley suggested ACGIH McCord suggested Industrial Medical Association IHF also mentioned Committee chose AIHA to invite as sponsor Chairman becomes Schrenk Vice Chair Irish Some of these groups simply enabled corporate representatives to be added under more independent and professional sounding classifications 11/8/56 comment by Drinker on silica attached at end of 12/6/56 minutes 1947,1951 1957 minutes of another committee Safety Code for Exhaust Systems e -_- - AMERICAN STANDARDS ASSOCIATION 21 WEST THIRTY NIITH STRNE EW E YOT RK fl- fl- fl <- ad _ _, ASA 237/52 March 11 1941 FOR PUBLICATION \ A Ny MINUTES SECTIONAL COMMITTEE ON STANDARD ALLOWABLE CONCENTRATIONS rae OF TOXIC DUSTS AND GASES - 237 January 29 1941 Subject to Confirmation in Room Street The meeting was called to order 1101 of the Engineering Societies New York N.Y. by the Secretary Building 29 West at 10 39th a.m. Present Yant F. P. Chrm Member Foulger J. H. HCA of US Gray Albert 8 CSPHA of NA Alternate for Stanley H. Osborn Hamilton Alice Dept.Lbr Johnston John Member McCord Carey P. AA of IP Neal Paul A. USPHS Sehl F. W. Member Stratton Reuel C. AICE & ACSE ) vonOettingen Member Fatson C. H. Member Whiting S. E. NANG Goi Ainsworth Cyril Recording Secretary Chapman G. H. Alternate National Association of Mutual Casualty Coe Rogers J. S. Alternate U. S. Department of Labor Snell M. A. Alternate Association of Casualty and Surety Executives Absent Adams James E. Bloomfield J. J. Bowditch Kanfred Drinker Cecil K. Drinker Philip Gardner Leroy Y. Greenburg Leonard AFI APHA LAGLO Member Member Member . IAIABC Haggard Howard . l'ember Hatch Theodore F. Hember Henderson Yandell Lanza A. J. Lember Paine Walter S. NSC Selby C. D. Member Vosburgh B. L. Member 25. Approval of Minutes was assumed that the minutes of the of June 3 1940 were duly approved approved No objections meeting of the as circulated being raised it sectional committee September 237/37 26.date Resignation of R. that under date of 26 A. avers 1940 The Secretary announced Dr. Sayers had ore- sented his resignation as Chairman of the committee because his duties as Director of the U. 5. Bureau of lines would not permit him sufficient time to continue Subsequently he had found it necessary to resign as a member of the committee SUTO020 C A ? 237/52 March 11 1941 Upon motion by Mr. unanimously Whiting seconded by Dr. ~ Neal it was RESOLVED that the Sectional Committee on Allowable Concentrations of Toxic Dusts and Gases - Z37 record its appreciation of Dr. Sayers conduct of its affairs and meetings during his term as Chairman and offer its thanks to him for his efficiency and fairness as its presiding officer As Chairman of the committee during the early and difficult period of its organi- zation and during the formulation and com plation of the first four standards which it had approved Dr. Sayers contributed unsparingly of his time and energy to the promotion and interest of the work RESOLVED that there be spread upon the minutes and communicated to Dr. Sayers the U. S. Public Health Service and the American Public Health Association this expression of warm appreciation of Dr. Sayers services and the regret of the members of the committee on his resignation as Chairman and as a mem- ber of the committee 237/38 27. Election of Officera 237/38 The Secretary re- ported that under date of October 14 1940 the Chairman had ap- pointed the following Nominating Committee to make nominations for Chairman and Vice Chairman of the committee Dr. A. S. Gray Chair- man Kr Philip Drinker and Dr. Alice Hamilton Members had been requested to forward their nominations for these offices to the chairman of the Nominating Committee . Dr. Gray presented the report of the Nominating Committee which had been based upon the nominations received from committee members and unanimously approved by his committee In accordance with the recommendations Committee and upon motion by Mr. Stratton duly unanimously of the Nominating seconded it was VOTED that Er Tilliam F. Yant be elected Chairman and Dr. C. D. Selby Vice Chairman Following the election Fr. Yant took the Chair SUTO020' 3 March 237/52 237/52 1941 jects 28 for Standardization under ASA Defense amenat gency Procedure - PR 34d.1 .in 22 Evdroren ASA Defense amenat the standards for Carbon l'onoxide Evdroren Sulfide Carbon Disulfide and Benzene had recently been a roved by the ASA as American Stan- dards He recalled that the necessity for completing these standards in the least possible time in view of the national defense rogram had been repeatedly mentioned The Committee might therefore wish to reexamine its program to determine which of the proposed standards would be most needed by industries manufacturing defense materials and make plans for their early completion He called attention to the Defense Energency Standards roved Procedure which had recently been a by the ASA in order to expedite the development and approval approval of standards which would be needed in the national defense program A similar procedure had been .developed and approved by the British Standards Institution and was now being used to develo emergency standards These standards had increased the efficiency of the production of var materialo The Chairman said thet drafts had been developed on six of the twelve substances selected by Dr. Selby's subcommittee follow- ing the meeting of the committee last June Drafts on the following substances had not as yet been completed completed for circulation to the committee Trichlor ethylene Tetrachlor ethylene Formaldehyde Toluol Methanol and Hydrofluoric Acid The committee nicht wish to consider these with other su stances on which standards would be needed in the defense program During the very full discussion the following substances were mentioned as being in use in industries manufacturing materials . for the defense program Toluol Xylol TNT Cyanide Dinaphthyl Manganese Cadmium Dinitrobenzene Tetryl Lead Azides Nitrogly- cerine Nitrated Glycos Alcohol Ether Acetone and Phenol Chairman Finally it was agreed that the Chair should appoint a subcommittee to select a list of substances from those which had been mentioned and report back at the afternoon session of the meeting concerning its recommendations The Chairman appointed Dr. Hamilton of the Subcommittee with Dr. Gray Dr. Neal and Mr. Shiting an members - . _ the Later in the subcommittee which meetin Dr. Hamilton had been unanimously presented approved the report of' "In accordance with the recommendations and upon motion by Mr. Stratton seconded by Dr. unanimously of the subcommittee Foulger it wAB RESOLVED that in vier of the national defense _ emergency are being progran under which many industries called upon to manufacture and use toxic substances the Sectional Committee on Allowable Concentrations of Toxic Dusts and SUTO020 a) =~ 4 237/52 March 11 1941 Gases - 237 is of the opinion that standard allowable concentrations such substances should be established at the earliest possible date RESOLVED that the committee recommend to the American Standards Association that standards on the following substances be developed under the Emergency Standards Procedure PR a.l Acetone Azides Lead Cadmium Ether Manganese Tetryl TNT Xylol and Sodium The recommendations of the subcommittee were also approved in regard to the appointment of the following members of the sectional committee to serve as Emergency Technical Committees und. er the Emergency Standards Procedure to develop the drafts Acetone - Dr. Carey P. McCord Azides Lead and Sodium - C. S. Cadmium - Dr. Cecil Drinker Public Health Ether - Dr. Howard . Haggard Manganese - U. S. Fublic Health Service Tetryl - Dr. John Foulger TNT - U. S. Public Health Service Xylol - Dr. Leonard Greenburg Service 29 General Policies Concerning Form and Content of Pro- posed Standarda Fin 17 Stratton was of the opinion that the material which had been included in Section II of the various drafts previously developed should have been arranged in a specific order He suggested that a detailed form for this section be followed in drafting all subsequent standards Following discussion and upon motion by Dr. seconded by Mr. Stratton it was unanimously Johnston VOTED that a uniform listing be adopted for properties of substances set forth in Section II of the proposed standards the The Chairman appointed a subcommittee consisting of Mr. Stratton Chairman Dr. McCord and Dr. von Oettingen to develop a proposed form to be used in listing the properties in Section II of the various drafts SUTO020 ee a) 5- ta) 237/52 March 11 1941 Later in the meeting Mr. Stratton Chairman presented unanimous recommendations of his subcommittee as followe that Section II of all standards developed by this committee be drafted in the following form Section II 2.1 Properties of - concise description of lay characteristics 2.2 Chemical formula Molecular weight Specific Gravity Welting point Boiling point Vapor pressure Vapor density Solubility Flash point Ignition temperature Exolosive limits The above order to be maintained 2.3 A concise description of the toxicological features No headings to appear for 2.1 2.2,2.3 Mr. Stratton stated that in formulating the list of proper- ties for paragraph 2.2 his subcommittee wanted it understood that each drafting committee would determine which of the properties would be included in the draft the properties selected as being to be listed in the order suggested by the subcommittee's arpepproorptriate Upon motion by Dr. unanimously Johnston seconded by Dr. Gray it was VOTED that the recommendations of the subcommittee in regard to the form for Section II be approvedapproved The Secretary reported that Dr. Selby had raised a question of concerning the contents Section on Analytical Methods in the proposed standards now before the committee and had stated in a letter dated January 24 1941 that he was inclined to question the of being so specific with respect to certain analytical desirability methods whether The Chairman said it should designate that only the one committee would research method have to decide or whether two SUTO020 6 237/52 237/52 March 237/52 1941 or three methods should be included produce dependable results if it we was decided they would Dr. Foulger thought it would be best to suggest one or two analytical methods which had been known to be reliable instead of making certain specific methods standard duly After full discussion and upon motion by Dr. seconded it was unanimously Johnston RESOLVED that the committer should not include in any standard mandatory requirements for specific analytical methods of determining the amount of toxic substances present in the atmosphere but should include in standards suggestions for the most desirable methods to be followed Kr Stratton said that while he favored the action concerning the section on analytical methods he thought the section on sampling in the proposed standards should include definite practical methods to be followed from which plants and companies could select the best applicable method for their own conditions Dr. Johnston suggested the sections on sampling uniform that the sampling and analytical that it might be desirable to make in the various drafts He thought methods could be put in a single section to show their relationship The Chairman was of the opinion that it would be to include certain specific sugestions which would insure sampling would be adequate desirable that the Dr. which samples on sampling Foulger thought should be taken that a reasonable time might well be included limit over in the section At the conclusion of the discussion on this point the Chairman appointed a subcommittee composed of Dr. Johnston Chairman Dr. Foulger and Mr. Sehl to review Section IV on Sampling and make recommendations for the improvement of the wording of the require- ments in the section recommendations Following the luncheon period during which the subcommit- tee net Dr. Johnston reported that while his subcommittee had reached a tentative agreement on recommendations concerning the section on sampling its final report would be submitted to the full sectional committee for review and approval The following projosela projosela were the members present at the meeting and by formal action of the committee discussed at some length by were agreed to in most cases | 72 SUTO020 * - - 237/52 March 11 1941 1 In all drafts of standards the word maximum should be used instead of maximal and the word concentration should be given in the singular instead of in the plural 2 In all drafts of standards the title of Section III should be Fermissible Concentration 3 In all drafts of standards parafra h3.1 should contain the maximum allowable concentration in parts per million and in villigrams per liter instead of giving the milligrams per liter in a footnote as had been previously decided Paragraph 3.1 would therefore read as follows air air air The maximum allowable concentration of - -- - = shall be - - - - parts er 1,000,000 parts of air by volume corresponding corresponding to - - - - mg per liter at 25 C and 760 mm pressure for exposures not exceeding a total of 8 hours daily 4 In all drafts of standards the allowable concentration should be given on a basis of 3 hours cally exposure This should above shown above in accordance with the wording for paragraph 3.1 given of Lead might which 30. 237/50 have time to Proposed American The Chairman discuss only Standard Allowable Concentration mentioned the fact that the committee one or two of the preliminary drafts had been circulated because so much time had been taken to discuss standarda which would be needed in the national defense pro- gram and general policies covering the form and content of standards He suggested that the drafts on lead and mercury be discussed if time permitted Mr. Stratton opened the discussion by questioning whether the proposed standard on lead should in addition to metallic lead also cover certain forms or all forms of lead He thought that the lead compounds to which the allowable concentration would apply should be specifically listed but it might not be essential to the properties of all the compounds that would be included give The Chairman said he could see good reason certain properties that would show the tendencies of contaminate the air . for putting in substances to , Dr. McCord said that a large number of industries were using soluble lead salts in the Mr. Whiting raised the question of whether the greatest exposure would not be from lead oxides de thought it would be nec- essary to include lead compounds proposed standard lead Dr. Foulger wondered whether the committee would wish to place lead silicate and lead acetate in the same category 15 SUTO020| 5 ~ nu ad 8 237/52 March 11 1941 Dr. Hamilton did not think this could be done unless a code would be developed developed for lead compound It would bseepvaerartye difficult to write a standard covering all lead compounds as they differed so widely in toxicity able Dr. Johnston concentration for was of the opinion that in writing an allow- lead there was not much use in discussing organic lead and not the compounds including basic limit might white The Chairman inquired whether the committee would want to this standard to metallic lead and lead oxides Consideration also be given to the following lead azides carbonates carbonates acetates including basic acetates and lead Dr. Neal did not think white lead should be included in the proposed standard and lead After full discussion concerning the various lead compounds and whether or not tthheey stsahnodualrddbeoncolveeardedshionuldtheincplruodpeosmedetasltlaincdalredad it was agreed that oxides acetates carbonates nitrates chlorates and basic sul hates During the discussion concerning Section II Dr. McCord suggested that paragraph 2.1 should contain the information that lead off noxious and poisonous vapors far below its measurable vapor gave point or its boiling point It was agreed that this sug- pressure in revising paragraph 2.1 gestion should be followed Dr. Hamilton suggested that the relative danger of absorption of lead through the mouth or by inhalation should be stated in paragraph 2.2 as this was a vtiotailnclpuodientthisIt swuagsgesatgiroenedantdhatmigphatra-be graph 2.2 should be revised reworded somewhat as follows The absorption of lead whether through the lungs or the alimentary canal may produce acute intestinal symptoms nervous symptoms and blood changes depending upon the quantities absorbed Inhalation appears to be " the most dangerous avenue of entrance The question of whether or not the proposed standard should include lead arsenates was discussed at some length It was sug- however that this substance might well be covered in gested standard since the hazard from the use of lead arsenate separate Industries such as the fruit industry occurred in widely diversified In conclusion it was agreed that a and manufacturing plants separate standard on the subject of lead to the arsenate was committee at needed and that its next meet- this question should be presented ing for consideration Membership 31. Additions to announced that the American Welding Min 1 The Secretary Society had requested membership on the sectional committee re, SUT0020 -9- 237/52 237/52 March 237/52 1941 program After discussion it was agreed that it would not be to the best interests of the project as a whole accord representation on the committee to any organization which might be interested in only a few of the large number of standards which would be developed on the committee should be confined to those organi- Representation and individuals who had a broad interest in the complete zations that the American of work It was mized however Welding Society as well as other technical and commercial groups would be would be interested in one or more of the standards which developed It was agreed that an opportunity should be given to the draft standards and send interested organizations to review their representatives to the meetings of the committee to present points of view Upon motion by Mr. Stratton seconded by Mr. Whiting it was unanimously RESOLVED Weldingthat copies of all draft standards developed the committee be sent to the American Welding Society for review comment and cri- ticism and that the American Welding Society be cordially invited to send a representative to sectional sectional committee meetings to present its points of view on those proposed standards in which it is interested The Chairman called attention to the broad research program on toxic substances which was now being carried on by the U. S. Bureau of Mines and the Keough Laboratories He was of the opinion that this important research work would be of value to the program of the committee It would therefore be desirable to invite these organizations to appoint representatives on the committee Upon motion by Dr. McCord seconded by Dr. Gray it was unanimously VOTED that the American Standards Association be requested to invite the U. S. Bureau of Hines and the Keough Laboratories to become members of the Sectional Committee on Allowable Concentrations of Toxic Dusts and Gases - 237 Mr. Stratton suggested that in the interest of promoting the use of the standards developed by the committee among state of labor and state health authorities as the basis of departments sectional committee particu- state regulations the members of the in consulting with larly those representing governmental groups of the American Standards state authorities should urge the adoption developed by this committee SUTO020_ - 10 - 237/52 March 11 1941 In this connection the Secretery requested all members of the committee to advise the ASA concerning any proposed state regula- tions covering allowable concentrations of toxic dusts and gases This would enable the ASA to urge the adoption of American Standards as the basis of these proposed state regulations The Secretary called attention to the importance of giving manufacturers of the substances which would be covered in the pro- posed standards full opportunity to present comments and criticisms on the proposed allovable concentrations concentrations Many manufacturers would have this opportunity through the Manufacturing Chemists Association which was now represented on the committee by Dr. Foulger In other cases manufacturers would be contacted directly by the ASA office change1s939 32. Announcement of Changes in Personnel The following had taken place since the approval of the personnel in July American Dr. Mr. Petroleum Institute Institute James K. Adane aplointed representative H. N. Blakeslee appointed alternate Public American Health Association - Hygiene Section vice Dr. A. R. Kr J. J. Bloomfield appointed representative Sayers Association Mr. M. Snell of Casualty and Surety Executives A. appointed alternate vice Fr. F. 7. Sehl Manufacturing Chemists Association Dr. John H. Foulger appointed representative National Safety Council Kr A. L. Forney appointed alternate vice Hr W. D. Keefer Public Health Service - Federal Security Agency Paul A. Neal appointed representative vice Dr. R. R. Sayers Dr. Department S. of Labor vice Dr. E. J. Stieglitz Mr. J. S. Rogers appointed alternate Members Dr. Edgar Eayer resigned Dr. Eugene L. Opie resigned 33. Adjournment ject to the call of Chair The meeting adjourned at 4 p.m. CYRIL AINSWORTH Recording Secretary sub- Reported by e A. Burke D. Borlby SUT0020 a Baan? 14 ~ AMERICAN STANDARDS ASSOCIATION A ASA sa To the Members of the Sectional Committee on Allowable Concentrations of Toxic Duste and Gages March 11 1941 Proposed revision of Sections on Sampling and Analytical Methods con Attached is the report of the Subcommittee on Sampling posed of Dr. Johnston Chairman Dr. Foulger and Mr. Sehl appointed by the Chairman at the recent meeting of the sectional committee to develop a revision of the section on sampling for future drafts of proposed standards : follows In submitting this report Dr. Johnston has written as on The committee appointed at the meeting January 29 of the Sectional Committee on Allowable Concentrations of Toxic Dusts and Gases - Z37 to report on a preferred word- ing for the section in the sampling procedure submits it recommends unanimously ASA Standards relating to the attached statement which It also is unanimous in recom- mending although this is beyond what it was asked to do that the statements on sampling procedure and on analytical Bethods be two parts of a single section in recognition of their close interdependence and in suggesting that the statement relative to analytical one along the lines indicated in the la to be noted that either paragraph methods attached d or ^ be a general report It would be used depending upon what X is This report is being circulated to the committee in accordance with Minute 29 which reads in part as follows '.Dr Johnston reported that while his subcommittee had reached a tentative agreement on recommendations concerning the section on sampling its final report would be submitted to the full sectional committee for review and approval It is requested that members the committee file their comments or approval of this proposed section by March 28 1941 It - will be assumed that members who do not reply by that time are in favor of the attached report _ In the meantime this section may be included in drafte which have been developed by members of the committee but if the committee votes to change the Section on Sampling and Analytical Methods such sections in proposed standards will be revised to meet the decisions of the committee . : CYRIL AINSWORTH - Recording Secretary - - Sectional Committee - 237 DB Encl Section IV Sampling Procedure and Analytical Methods SUTO020 \ Section IV Sampling Procedure and Analytical Methods 4.1 The samling samling procedure la to be in accordance with what experience shows is necessary to secure a sample which is truly representative of the actual working conditions at the location tested this implies that the taking of the sample does not of itself alter these conditions Atten- tion is directed to the following points a Samples Samples of air shall be taken wherever there is a known or suspected source of borne X. b Samples shall be taken at the breathing level close to mouth or nose of the worker with special attention to locations near the source the dust or fume and in the path of air currents carrying it towards the worker if such a condition exists c Samples shall be taken in sufficient number whatever differences in concentration exist working period to show up during the In the case of dusts] d The rate at which the sample of air is drawn into the impinger or other test litres per minute the apparatus volume of shall not exceed 30 the sample should be as small as is compatible with the precision of the analytical method employed and the time required for withdrawal of a single sample should in general not exceed one hour In the case of fumes or vapors ] d The rate at which the sample of air is withdrawn into the test apparatus shall not in general exceed 10 litres per minute the volume of the sample should be as small as is conatible with the precision of the analytical method -- loyed -- loyed and the time required for withdrawal of a single sample should in general not exceed one hour 4.2 It is understood that a fifth paragraph may be included to cover any special case - for instance if a properly checked and controlled continuous recording procedure should be applicable The analytical methods commonly used for this purpose are based on here a brief general description e.g. a colori- metric or photometric comparison full details are given in the references cited below Any other analytical pro- cedure may be used rovided that its applicability and re- liability have been established SUTO020 = 15 _ AMERICAN STANDARDS ASSOCIATION AMERICAN STANDARDS STANDARDS STRET ASOCIATION YORK 237/69 ASA September 5 1941 - ae! NOT FOR PUBLICATION MINUTES EXECUTIVE COMITTEE OF THE SECTIONAL COMMITTEE ON STANDARD ALLOWABLE CONCENTRATIONS OF TOXIC DUSTS AND GASES Z37 July 29 1941 Subject to Confirmation e 10 a.m. The meeting was called to order by W. P. Yant Chairman at in Room 903 Engineering Societies Building 29 West 39th Street New York N. Y. Present Yant W. P. Chairman Member Large Hamilton Alice Dept.Lbr Dept.Lbr Johnston John McCord C. P. Member AA of IP ) Neal P. Health Ser Sohrenk H. H. U.S.Bur.Hines U.S.Bur.Hines Selby C. D. Member ) Stratton R. C. AICE & ACSE Member Ainsworth Cyril Drinker Philip Secretary ASA staff 237 Sec Com School of Public - Health Harvard University McKee Dr. Rogers J. , Ralph W. School of Public Health Harvard University S. Alternate representative U. S. Dent Labor 237 Sec Com Division Labor Standards Sterner Dr. James H. Laboratory of Industrial Medicine Eastman Kodak Company Watson Dr. C. H. Member 237 Sec Com American Telephone ot 7 . and Telegraph Company 1. Appointment of Executive Committee 237/58 and 59 The letter ballot asresulat to the sectional announced that a of Cchoamimrimtatnee under date of June 17 1941 the committee had unanimously approved the appointment of an Executive Committee to 1 Initiate work on new subjects especially those needed in the defense program 2 Select and invite members of the sectional committee or other in- dividuals to develop draft standards on the subjects selected and 3 Review drafts prepared by members of the sectional committee to determine whether they are in order for consideration by the full com- mittee He had therefore appointed the following as members of the committee Alice Hamilton John Johnston C. P. McCord P. A. Neal H. H. Schrenk C. D. Selby and R. C. Stratton He was gratified that of o all members the committee could be present at this meeting since there were a number of matters to come before the committee as evi- SUT0020 Ie 5 (4 pele =~ 2 237/69 September 5 1941 denced by the agenda He honed the Executive Committee might be the means of expediting the work on this project However it was not intended to subordinate the sectional committee in any way but to use this smaller group as a steering or working Committee to speed the program of work which was now broadening rapidly as would be seen from the fact that fourteen proposed standards were now before the committee for consideration Many of the actions of the Executive Committee would have to be ratified by the sectional committee and final action on all standards would remain in the hands of the sectional committee All the actions of the Executive Committee would be subject to review by the sectional committee 2. Status of Emergency Standards Under Development Secretary reported on the status of various standards now being oped under the Emergency Procedure of the ASA The devel- a Diethyl Ether A proposed American Defense Emergency Standard Allowable Concentration of Diethyl Ether had been prepared by Dr. H. W. Haggard in accordance with the request of the sectional committee and circulated for comment and criticism under date of May 28 1941. Members of the sectional committer had been requested to send in their comments by June 16 1941 and replies had been received from twenty members seven members not replying which had indicated that they favored the proposals in the draft Of the twenty members who had submitted comments only two serious objections had been received both concerning the proposed allowable concentra- tion one from the U. S. Public Health Service and one from Dr. Foulger representing the Manufacturing Chemists Association Following completion of the canvass of the committee a digest of the comments had been prepared and sent to Dr. Haggard for review in accordance with the procedure Dr. Haggard had revised the draft to take care of few editorial corrections and had written to the U. S. Public Health Service in reply to their inquiry concerning the basis of the concentration which he had included in the draft He had selected the value of 400 parts per million since his research had shown that the amount of ether inhaled at this concentration did not produce any detectable changes in behaviour and could not cause any impairment of health This figure had also been chosen as a suggested value by the states of Massachusetts and California After careful consideration the U. S. Public Health Service had decided to approve this figure with the un- derstanding that the concentration would be subject to correction as soon as more information would be available Dr. Foulger however had asked that the issuance of the standard be delayed until he could obtain information from various companies manufacturing smokeless powder the process of which required the greatest use of ether in the present defense program He had advised the ASA office that this information would be obtained as soon as possible and would be forwarded for consideration Up to the present time it had not been regelved although the proposed standard had been held up since June date on which the revised draft had been received from Dr. 23 the Haggard the value Dr. Neal said that the Public Health of 400 ppm until they found evidence Service would from research recommend they were 3 237/69 September 5 1941 preferable now carrying on that another value would be A standard on this substance was definitely needed since it seemed entirely pos- sible that accident proneness could be caused from concentrations above this figure and Dr. Haggard had oertainly arrived at this pro- posed concentration after much study Mr. Stratton stated that the exposure in smokeless powder plants was from alcohol ether mix Since Dr. Foulger represented an organization which had in its membership a large number of manufacturing companies directly concerned with the manufacture of this material his objection although the only one now recorded would seem to war- rant some consideration Following discussion and upon motion by Mr. Stratton seconded by Dr. Johnston it was unanimously VOTED that Dr. Foulger be requested to confer with Dr. Haggard concerning the data which had been collected from the plants now manufacturing smokeless powder relative to the concentrations of ether in which employees are now working and that Dr. Foulger be requested to present whatever data was now available and additional data which he could obtain within the next month so that final consideration could be given the proposed emergency standard early in September b Acetone The Chairman stated that since several people outside the committee had come to the meeting in order to discuss the proposed defense emergency standard on this subject he wished to bring it before the committee at this time The Secretary said that this was one of eight subjects which had been selected by a special committee and approved by the sectional committee at its meeting on January 29 1941 for development as an emergency standard Members of the sectional committee who had attended the meeting had ample opportunity to discuss the various subjects which had been selected and other members who had not been at the meet- ing had been at liberty to object to any of the subjects selected when they reviewed the minutes However no objections had been received and Dr. McCord had been requested to develop a draft standard on this subject The first draft had been circulated to the sectional committee under date of June 20 together with a memorandum containing a discussion by Dr. McCord on the subject Fourteen members of the com- mittee had sent in comments and several comments had been received from organizations and individuals outside the sectional committee Various minor corrections had been suggested in sections 2 4 and the bibliography Only two serious objections had been received concerning the allowable concentration from committee members one from Mr. Paine representing the National Safety Council who had suggested using the higher figure of 1000 ppm for eight hours exposure and the other from Messrs Cecil and Philip Drinker Members who had SUTO020 ay | ~ ~ 4 237/69 September 5 1941 stated that the concentrations shown in the draft were in their opinion much too severe and urging that the development of a standard on this subject be postponed until much needed data could be obtained Following receipt of this letter Mr. Drinker had submitted comments from a number of people whose opinions he had solicited most of whom agreed with his points of view Mr. Drinker was now present at the meeting to discuss this subject and would offer data to support his points of view Kr Drinker referred to a letter which he had received from. Dr. Foulger a member of the sectional committee supporting his pointe of view This correspondence together with correspondence from Dr. H. L. Barthelemy Chief Chemist of the Tubize Chatillon Corporation of Rome Georgia manufacturers of viscose and acetate rayon products had been filed with the A5A office He understood that Dr. Cranch of the Industrial Toxicology Department Carbide and Carbon Chemicals Corporation who produced large quantities of acetone had submitted a letter suggesting that the proposed limits would be unnecessarily restrictive and that if it was necessary to set a standard 1000 and 2000 ppm would seem more in order Mr. Drinker introduced Dr. Ralph W. McKee from the Laboratory of the Harvard School of Public Health who was working with him on a study of the harmful effects of acetone Dr. McKee presented data concerning experiments which had been conducted and which had failed to show any particular abnormal effects from exposure to acetone These studies would be continued and experiments made with animals in the laboratory and with men working in plants to determine the rate at which acetone was absorbed and eliminated on exposure to known concen- trations The Chairman then introduced Dr. James H. Sterner of the Laboratory of Industrial Medicine Eastman Kodak Company who presented data obtained from the study of men working with acetone in their compANY These studies had not revealed any toxicity from acetone exposure nor had to this their experience ever snown any harmful effects from substance Dr. Sterner reported This same result had been obtained from studies m^,de in the Tennessee Eastman Plant In reply to a question from the Chairman Dr. Sterner said that new workmen had reported a feeling of intoxication until after they had worked in the plant about three months Men in the EastmAN plant worked in concentrations from 1500 to 2000 ppm for four hours daily Dr. Selby questioned Dr. Sterner rates during the period of his study Dr. formation on this point butthoughthte men concerning the sickness Sterner had no definite in- had been fairly healthy Dr. Schrenk wondered about the accident records workers under such conditions more accident prone Were the SUT0020 | C . -~ 5 237/69 September 5 1941 Dr. Neal sald he believed the most important thing was nerformance and coordination among workers exposed to this substance The Public Health Service had received a large number of inquiries concerninthge toxicity of acetone Dr. McCord said that the information which had been presented at this meeting was the result of the circulation of the proposed standard which result he had hoped to obtain The figures used in the draft which he had prepared had been based on high concentrations for short periods of time He had however worked in industries where people had been exposed to high concentrations up to 4000 ppm and he had not observed any toxic conditions There followed a general discussion on the need for a standard on this subject While those present had no information which would show a proved case of acetone poisoning it seemed to be the con- sensus of opinion that the wider use of the substance particularly in the explosive industry during the present emergency had created a need to establish a figure which would be acceptable and would serve for protection against toxic effects in high concentrations for long periods as well as protection against accidents caused by the intoxi- cant effects of the substance Finally after a very full discussion Dr. McCord seconded by Dr. Selby it was and upon motion by VOTED that the maximum allowable concentration of acetone in the proposed standard be revised to 2000 ppm for eight hours daily exposure and 3000 ppm for four hours daily exposure Dr. Neal requested that his vote be deferred Upon motion by Dr. unanimously Neal seconded by Mr. Stratton it was VOTED that the published figures of the U. S. Bureau of Hines for the explosive limits of in acetone 2.55 to 12.3 be included the list of properties in paragraph 2.2 After further discussion it was agreed that the term Flu as shown in paragraph 2.2 should be deleted . .. . to It was agreed that all editorial corrections should be re- . ferred Dr. McCord for preparation of a final draft . Dr. Johnston proposed the inclusion of a paragraph to be put at the end of the present paregraph 2.2 Later in the meeting " = e e . C Fan) -6- 237/69 September 5 1941 he presented a definitely worded paragraph for consideration mously Upon motion by Mr. Stratton duly seconded it was unani- awn VOTED that the following paragraph be included in paragraph 2.2 in the proposed standard on acetone Acetone as used in industry often contains impurities in small quantity These affect some of the values listed above may influence both the physiological effects and the result of the analytical procedure - - Acetone is frequently admixed with other volatile materials - title It was agreed that paragraph 2.2 should have the following Properties of Pure Acetone It was further agreed that a paragraph and title similar to be the ones approved for the proposed cluded in drafts of other proposed standard on acetone should standards where applicable in- oe te 0 Cadmium The Secretary reported that the development of this proposed emergency standard had been approved by the sectional committee and the first draft had been prepared by the U. S. e Public Health Service It had been circulated under date of June 20 1941 to the sectional committee for comments and criticism Eleven members of the committee had sent in comments on the draft almost entirely favorable A few editorial corrections had been suggested but no one had raised any objection to the allowable concentration The comments received would be referred to the Public Health Service for consideration in preparing the final draft to be submitted for approv- al as an American Defense Emergency Standard Dr. McCord suggested that the analytical clude reference to the use of a polaragraph methods should in- Dr. Schrenk said that they had found cadmium determinable by a polaragraph and that a spectograph could be used After discussion it was greed that graph referred to only one particular device to include a general reference to this type of it was agreed that the following phrase should sentence of paragraph 4,2 since the term polarait would be desirable equipment Finally be added to the first Or by suitable dropping mercury electrode procedure* sectional In conclusion it was agreed that since the canvass of the committee had shown that a national consensus existed on SUTO020 fr} .7- 237/69 September 5 1941 approval of the proposed emergency standard it should be referred back to the Public Health Service for final revision and submitted to the ASA for approval as an American Defense Emergency Standard Later in the meeting it was decided that the note referring to the allowable concentration in paragraph 3.1 should read se follows NOTE It is customary to express the concentration of metal funes oxides or salts in milligrams per ten cubic metera d Manganese The draft on this proposed emergency standard had not as yet been circulated for comment and criticism but had been held for discussion and review at this meeting as a means of expediting its completion The Public Health Service had prepared the preliminary draft of this standard After discussion agreed to the following revisions in the draft were Section I SCOPE AND PURPOSE me 1.1 Add the words and fumes after the word dust this to apply throughout the draft ee 1.2 Make the same correction as in 1.1 ne we wee Section 2 PROPERTIES OF MANGANESE 2.1 Add the words as ferro manganese after the first word in the second sentence Change the third sentence to read as follows Manganese is a constituent of certain alloys Change the final sentence to read langanese dioxide is used in the manufacture of dry cells in the paint industry and in the ceramic industry be added enthesis 2.2 It was suggested that in the bibliography instead following the property a reference to the atomic weight of using the date 1940 in par Section 3 PERMISSIBLE CONCENTRATION 3.1 concentration manganese per Change this paragraph to read The maximum allowable of manganese dust and fumes shall be 60 milligrams of 10 cubic meters of air 2 ^' 4 : SUT0020 le 1 1g . A C - 6 - 237/69 September 5 1941 The note referred to by the asterisk following this paragraph should read It is customary to express the concentration of met~ oxides or salts in milligrams per ten cubic meters This should be used in other drafts where the concentration had l fumes wording been given in milligrama of elr per ten cubic meters instead of oarta der million parts Section 4 SAMPLING PROCEDURE AND ANALYTICAL METHODS No changes suggested It was agreed that this draft should be circulated to the sectional committee and any other interested organization or individuals for comment and criticism as a proposed American Defense Emergency Standard that had definite 3. New Emergency Chairman reported he Standards Proposed for Development The received information to the effect that emergency standards were needed on the toxicity of fumes from heavy metals such as arsenic antimony and zinc He had written to neveral members of the committee in an attempt to verify this in- formation and had been advised that these standards were among those needed in the defense effort Among the members contacted was the Public Health Service who had advised him that they had sufficient data on which standards covering these subjects could be based Sub- sequently the Public Health Service was requested to develop preliminary drafts on arsenic and antimony which they had now accomplished Following a brief discussion and upon motion by Dr.Johnston deconded by Mr. Stratton it was unanimously RESOLVED that the Chairman be commended for his initiative in requesting the U. S. Public Health Service to develop the proposed emergency standards on arsenic and antimony RESOLVED that the Sectional Committee on Allowable Concentrations of Toxic Dusts and Gases 237 be requested to recommend to the American Standards Association that standards on the following subjects be developed under the ASA Emergency Standards Proce~ ure Arsenic Antimony Zinc SUTO020 . C -9- 237/69 September 5 1941 In anticipation of a favorable response from the sectional committee and the ASA concerning the proposed development of the emergency standards the committer reviewed the preliminary drafts on arsenic andantimony which had been prenared by the U. 9. Public Health Service and recommended that the following be made in the drafts pending circulation for comment and criticism a Arsenic There was considerable discussion Soncerning the scope of the proposed standard on arsenic It was sub 191 ed that the standard might include lead arsenate Finally however it was agreed that the scope of the proposed standard should be limited to arsenic as a metal and arsenic trioxide It was agreed that the properties of the arsenic oxides should be added under paragraph 2.2 Following discussion it was agreed that paragraph 3.1 should read as follows The maximum allowable concentration of metallic arsenic and arsenic trioxide shall be 1.5 milligrams of arsenic per 10 cubic meters of air The following wording should be included as an explanation of the reason for giving the allowable concentration in milligrams per ten cubic meters instead of parts per million It is customary to express the maximal permissible concentration of metal fumes oxides or salts in milligrams per ten cubic meters* It was agreed that if the development of this proposed standard under the emergency procedure was approved the draft as amended at this meeting should be circulated to the sectional committee for comment and criticism . should b Antimony agreed that paragraph 1.1 Following a brief discussion it was be revised to read as follows mae The standard allowable concentration of antimony either as metal or oxide applies to all places of employment Ce It was agreed that the properties of the oxides should be added to paragraph 2.2 After discussion it was agreed that the symptoms of poisoning from antimony should included in paragraph 2.3 instead of the statement The symptoms of antimony poisoning are similar to those produced by arsenic" lg SUTO020 . * SE. - ~ - 10 - 237/69 September 5 1941 Upon motion by Dr. Johnston seconded by Dr. Selby it was ee unanimously endl e VOTED that paragraph 3.1 of the proposed draft on Antimony be revised to read as follows The maximum allowable antimony as a metal or milligrams of antimony of air concentration of oxide shall be 1.5 per 10 cubic meters It was also agreed that the following paragraph should be included as a footnote to paragraph 1 . . It is customary to express the maximal permissible concentration of metal fumes oxides or salts in milligrams per ten cubic meters* If the development of this proposed standard under the emer- should gency cism procedure was approved the draft as amended at this meeting be oiroulated to the sectional committee for comment and criti- : Upon a request from the Health Service would revise these cussion at this meeting and would proposed standard on zine Chair Dr. Neal said that the Public two drafts as indicated by the dis- develop the preliminary draft of the . 4, Proposed Emergency Standards on which Data Was Not Available The Secretary sald that the development of proposed stand- ards on Tead and sodium azides TNT and tetryl had been approved by the sectional committee and the committee had recommended the development of these standards under the ASA Emergency Standards Procedure The Public Health Service had been requested to develop the proposed standards on lead and sodium azides and TNT and Dr. Foulger has been re- quested to develop the draft on tetryl . After investigating the that the data available on tetryl it would be impossible to draft a dust or vapors from this compound subject Dr. Foulger had reported covered only skin exposure and that proposed allowable concentration of unless more research would be done on the subject He would however be willing to develop a preliminary draft including such data as was available on the action of the compound on the skin Dr. Foulger's letter concerning this proposed standard had been referred to the Chairman who had recommended that a draft be developed based on the action of the compound on the skin and if desirable that research be recommended covering the inhalation of dust vapors from this compound This recommendation had been re- SUT0020 11 237/69 September 5 1941 ferred to Dr. Foulger but he had not as yet submitted a draft on this proposed standard " experiments Dr. Neal had reported in a letter that the Public Health Service had been conducting animal on the toxicity of leed azide pertaining to its oral administration They were not however prepared to make any final statement concerning its toxicity However it would seem that lead azide by oral administration would be somewhat more toxic than some of the other lead compounds They had no studies on the toxicity of sodium azide From its industrial use it under way connected with this material would appear that very few hazards were in the manufacture of since it had only been used as an intermediate lend azide In regard to a possible standard allowable concentration of TNT in air sufficient information was not available in literature to allow even a tentative appraisal of such hazards It appeared to of opinion that the main route of absorption of TNT w beas thtehecosnksiennsusThis problem had been complicated further by the fact that different brands of TNT would show considerable variations in their toxicity depending upon the degree of their contamination with other nitro compounds The Public Health Service had prepared an ex- tensive review of this subject which would soon be published ment them Dr. Neal said that he would recommend delaying the develop- of standards on these subjects until more information concerning would be available Finally after discussion it was unanimously agreed that the Executive Committee request the Sectional Committee on Allowable of Toxic Dusts and Gases Z37 to recommend to the ASA Concentrations of standards on lead and sodium azide TNT and that the development Standards Procedure be discontinued tetryl under the ASA Emergency of these proposed standards be held in abeyance and that development pending action by the sectional committee based on the availability of additional data on these subjects preliminary 5. Proposed Standards Now Under Development The Chairman sald that a number of revised drafts and two drafts of standards were now ready to be circulated to the sectional proposed committee for comment and criticism It had been thought advisable these drafts in order to expedite for the Executive Committee to review their consideration by the sectional committee when they were circu- lated The drafts on Nitrous Gases Tetrachlorethane Carbon Tetra- had all been circulated to the chloride Mercury Chromium and Lead to its last meeting It had been hoped sectional committee previous these drafts at that meeting but there had not been suffidiscussed in detail to discuss cient time Only the draft on Lead had been all the drafts had been revised since the meeting in accord- However with decisions made by the sectional committee The revised ance drafts were now he hoped in fairly good shape , |/7 SUT0020 T es re ae 12 237/69 September 5 1941 a Nitrous Gases The revised draft on Nitrous Gases which had been prepared by Dr. McCord was discussed at some length NO2 particularly in regard to the proposed allowable concentration of 70 ppm for nitrogen dioxide and 20 ppm for nitric oxide NO - for Following full discussion upon motion by Dr. Johnston seconded by Dr. Neal it was unanimously VOTED that the proposed standard be revised concentra 2 to cover only nitrogen dioxide NO and that the allowable tion be set at 50 ppm Following revision it was agreed that the draft should be sent to letter ballot of the sectional committee for approval b Tetrachlorethane Dr. Hamilton said that since developing the drafts of this proposed standard she had found that tetrachlorethane was not being used to any extent in the present emergency While this substance had been widely used in the previous world war its use had almost completely been replaced by other less danger- substances Other members of the committee concurred in this opin- ioionn After discussion and upon motion by Mr. Stratton seconded by Dr. Schrenk it was unanimously = e VOTED e that the Executive Committee recommend to the Seational Committee on Allowable Concentrations of Toxic Dusts and Gases pme = 237 that completion of the proposed a standard on tetrachlorethane be held in abeyance until some contingency arrived where there seemed to be a need for it 0 Carbon Tetrachloride In the review of this pro- posed standard there was no objection raised to the allowable concen- tration It was agreed that a reference to the formation of phosgene as mentioned in paragraph 2.2 should be included in the bibliography This referred to paper on the formation of phosgene by Mr. Yant It was also agreed that the draft should be circulated to the sectional committee prior to discussion at a meeting and that comments and criticisms on the draft should be solicited from the fol- lowing Dow Chemical DuPont Westvaco Pyrene and rubber manufactur- . OTS SUTO020| 13 237/69 September 5 1941 d Mercury During the discussion there was very little criticism of this proposed standard none relating to the allow- able concentration It was agreed that the following changes should be made before the draft would be circulated to the sectional committee prior to discussion at a meeting J antl 2.2 Delete solubility of Hgo as the standard covered only Hg 2.3 Add the words psychic irritability before predominating in the last sentence 3.1 This paragraph to read The maximal allowable concentration of mercury shall be 1 milligram per 10 cubic meters of air A note referring to the allowable concentration to be added at the bottom of the page reading It is customary to express the maximal permissible concentration metal of meters fumes oxides or salts in milligrams per ten cubie It was also suggested that a paragraph might be included giving the places where exposures to the substance most often occur the scope of draft should e Chromium There was a full discussion concerning this proposed standard It was agreed finally that the cover chromic acid and chromates The following revisions in the draft were agreed to 1.1 1,2 Delete the word and following mist 2.1 This paragraph to be revised to include the characteristics of chromic acid and chromates - two common alkali chromates such as sodium and potassium dichromates 2.3 Change second sentence to read Contact of the skin or mucous membrane with the dust or solution of soluble chromates or dichromates may cause dermatitis and ulcers 3.1 Change the word oxide to anhydrite to be checked to make sure it applies The concentration . ard After the discussion it was agreed that this proposed should be revised and circulated to the sectional committee to discussion at a meeting stand- prior that the standard f following before it Lead After a brief discussion it was agreed changes should be made in the draft of the proposed was circulated prior to its consideration by the . sectional committee at a meeting . 2.3 Revise the first sentence to read The absorption of lead in sufficient quantities either through the lungs -~ . = . - 14 - 237/69 September 5 1941 or the intestinal tract may produce acute gastro- intestinal symptoms nervous symptoms and blood changes 4.2 The phrase dropping mercury electrode to be added in the first sentence following- trographically or by means of posed short g Formaldehyde The preliminary draft of this pro- standard had been developed by Dr. Gray and received only a time before this meeting It had not therefore been circulated for comment and criticism After a short discussion it was agreed that the draft should be circulated to the sectional committee for comment and criticism and to such other groups as might be interested including Westinghouse Electric and Manufacturing Company for the attention of Mr. E. C. Barnes Industrial Hygiene Engineer Dr. Sterner who was present as a guest volunteered to review the draft and send in comments on it - h Toluene Dr. Greenburg had just completed the preliminary draft of this proposed standard which had not as yet been circulated for comment and criticism Because of insufficient time the draft was not reviewed in detail It was agreed that it should be circulated to the sectional committee for comment and criticism 6. Appointment of Subcommittee to Check Chemical and The Physical Data Chairman said that various members of the Committed had discussed the problem of selecting the chemical and physical pro- perties of the various substances in order to meet the opinions of all of members the sectional committee other interested organizations and individuals As the members would recall the sectional committee had previously voted that such material should be taken from the Interna- tional Critical Tables unless later and more authoritative information was available However the Critical Tables listed a number of values for each property and thus many of the controversies had arisen con- cerning the proper figure be used in the drafts which had delayed completion of the proposed standards It had been suggested that a - subcommittee be appointed to check the chemical and physical proper- ties in final drafts of standards where any of the values had been questioned . After discussion this suggestion was agreed to and Dr. Chairman requested Johnston and Mr. Stratton to form this subcommittee These gentlemen accepted the assignment the editing the 7. Development of Froposed Standard on Silica The Chairman questioned whether committee wanted a standard on silica He had received a request from the National Electrical Manufacturers Associa- tion to put the question of developing standards for clay dust before the sectional committee and the ASA office had been corresponding with western organizations both state and industrial who had made inquir- ies concerning high concentrations of dusts caused by the operations of crushers and pulverizers SUT0020 115 33 - 15 - 237/69 September 5 1941 to The Secretary said that this subject among others had been selected for standardization by the sectional committee at its meeting on August 7 1939 upon recommendation of the Subcommittee on Plan and Scope All of the other subjects selected at that time le lead mercury toluol etc. had now been assigned various members for the development of drafts It might be well have silica assigned to a member particularly interested in the subject or to a subcommittee of several interested members Kr Stratton remarked that he thought the committee was ready to consider a report on the subject since there were a number of codes in existence now on the subject of silica that might be used es a starting point for the work of this committee Kr Finally following a brief disoussion and upon motion by Stratton seconded by Dr. Schrenk it was unanimously VOTED that the Chairman a subcommittee to dusts and develop for consideration be authorized to appoint study silica and other a preliminary standard by the committee 8 Development of Drafts on Subjects Previously Assigned The Chairman mentioned that there would be an effort made to have all drefts completed which had been assigned or if it was not possible for the members who had been assigned the duty of preparing the drafts to fulfill their assignments other members would be requested to accept such assignments Mr. Drinker who was present at that he would try to complete the drafts tetrachlor ethylene at an early date the meeting on trichlor as a guest said ethylene and The Secretary was requested to contact Mr. Bowditch termine whether or not he could prepare the preliminary draft on hydrofluoric acid to destandard The Chairman requested Dr. Schrenk to accept the assignment of the preparation of a draft standard on methanol Dr. Schrenk indicated that he hoped to be able to accept the assignment Adjournment 9 to the call of the chair The meeting adjourned at 6 p.m. subject CYRIL AINSWORTH Recording Secretary DB a, : 0 SUTO020 0 0 . 7 7 . / Ja i {ml se  an AMERICAN STANDARDS ASSOCIATION 22 BEZ NINTH STREET NEW YOLK x =~ et! a ASA 237/91 December 11 1941 NOT FOR PUBLICATION REPORT OF ACTIONS TAKEN BY SECTIONAL COMMITTEE ON ALLOWABLE CONCENTRATIONS OF TOXIC DUSTS AND GASES - Z37 December 11 1941 Subject to confirmation The meeting was called to order by the Chairman at 10 in Room 817 of the Engineering Societies Building 29 West 39th New York N.Y. a.m. Street Present Yant H.P. Chrm Member Foulger J.H. MCA of US Gardner Leroy Member Gray Albert S. CSPHA of NA Alternate for 8.H.Osborn) Greenburg Leonard IAIABC Hamilton Alice Dept. Johnson A.B. War Dept. Johnston John Member Lanza A.J. Member McCord Carey P. AA of IP Neal Faul A. USPHS Paine Walter S. NSC Schrenk H.H. U.S.Bur ) Stratton R.C. AICE & ACSE Tebbens B.D. Member Representing B.L.Vosburgh Whiting 9.E. NAMC Gas) Ainsworth Cyril Recording Secretary Bedwell R. C. Captain Medical Corps U.S. Army Cranoh A. G. Representing American Welding Society Gehrmann C. H. duPont Company Shaw John S. Hercules Powder Company Absent Adams James M. API Bloomfield J.J. APHA Bowditoh Kanfred IAGLO Drinker Cecil Member Drinker Philip Member Haggard Howard Member Member Theodore F. Henderson Yandell Selby C. D. Member ) Sehl F. W. Member von Oettingen FiMember Watson C. H. Member ) 34. Approval of Minutes Upon motion by Mr. Paine seconded by Dr. Gray it was unanimously VOTED that the minutes of the meeting of the committee of January 29 1941 be approved as circulated SUTO020 |! 2 . 237/91 December 11 1941 The 29 of 35. Report on Recommendations the Executive Committee Secretary reported that the Executive Committee had met on July 1941 and had voted to recommend various actions to the sectional committee committee Emergency a Proposed American Defense and Zino The letter ballot vote of Standards on Arsenic Antimony the sectional committee on the question of developing these standards under the ASA Emergency Stand- ards Procedure had resulted in 23 affirmative 4 negative and 1 ballot not returned Mesers Cecil Drinker Philip Drinker Theodore Hatch and 8. E. Whiting had voted in the negative Mr. Manfred Bowditch had not returned his ballot Mr. F. W. Sehl had voted in the affirmative but had questioned whether a standard should be developed on zino Dr. Ceoil Drinker had been the only member submitting reasons for his negative vote Following a very detailed and lengthy discussion concerning the need for developing standards on these subjects and Dr. Drinker's comments in connection with his negative vote upon motion by Dr. Greenburg seconded by Dr. Gray it was unanimously VOTED that the Chairman be authorized to appoint a subcommittee to investigate the desirability of developing emergency standards on arsenic antimony and zinc and make recommendations to the sectional committee for its considera- tion and that no request for the development of such proposed emergency standards be made to the American Standards Association pending the report of the subcommittee Upon motion by Dr. unanimously Foulger seconded by Dr. Gray it was VOTED that the subcommittee just authorized be composed of not less than three members of the sectional committee of which at least one member should be industrially interested in the development of studies of the subjects under consideration Upon motion by Dr. unanimously Foulger seconded by Mr. Paine it was SUTO020 103 fi" fi" , ao -3 Decem2b37/91 er 237/91 237/91 1941 VOTED that the and Zinc members Subcommittee on Arsenic Antimony be composed of the following P. A. Cecil Carey Neal Chairman K. Drinker P. McCord Upon motion by Mr. Paine unanimously seconded by Dr. Neal it was VOTED that the Chairman with the advice of the Executive Committee be authorized to appoint subcommittees to consider subjects which might be suggested for the develop- ment of standards under this project TNT b Proposed American Defense Emergency of the Standards sectional on Lead and Sodium committee by letter Azides and Tetryl The vote the development of standards ballot on the question of discontinuing on these subjects under the ASA Emergency Procedure and holding them in abeyance pending receipt of additional data had resulted in 27 affirmative ballots and 1 ballot not returned Mr. Manfred Bowditch had not returned his ballot During the brief discussion it was mentioned that draft standards on these subjects would not be developed until additional technical information was available c Proposed American Defense Emergency Standard on Tetrachlorethane It would be recalled that Dr. Hamilton had developed an initial draft of this proposed standard which had been circulated for comment and criticism Subsequently Dr. Hamilton had advised the Executive Com- mittee that since developing the draft she had found that tetrachlor- ethane was not being used to any extent in the present emergency and had been almost completely replaced by other less dangerous substances The Executive Committee had therefore recommended that the completion of the stendard be held in abeyance until it was found to be needed The vote of the sectional committee by letter ballot on the recommend- ation of the Executive Committer had resulted in 26 affirmative 1 end 1 ballot not returned Dr. Leonard Greenburg represent- negative the International Association of Industrial Accident Boards and ing Commissions had voted in the negative but had given no reason for his vote Hr Manfred Bowditch had not returned his ballot Dr. Hamilton remarked that this substance was really not important at the present time and althaovauiglhabiltewa ts o kensotwanblitsohbeallowpoisonous there was no definite data : able limits . | | I ran) ~-~h&e. a 237/91 December 11 1941 Dr. Greenburg stated that negative had been because he had no ard should not be completed the reason he had definite evidence ee voted in that the the stand- Following discussion and upon motion by Dr. seconded by Hr Paine it was unanimously Foulger VOTED that should the subcommittees entrusted with the task of considering the advisability of developing new standards reach the decision that standards were not desirable because of lack of sufficient information the decision be reported to consideration the and sectional committee . for that if the sectional committee concurred in the decision of the subcommittee such action be reported to the American Standards Association with the recommendation that the decision be given the same publicity as would be given to standards which had been completed d Proposed American Standard Allowable Concentration of Nitrous Gases The Executive Committee had considered a revision of the proposed standard on nitrous gases and had recommended additional revisions Several drafts had been developed of this proposed standard and the Executive Committee had believed that the forthcom- ing draft would be in readiness to be voted upon by the sectional committee In accordance with the committee's recommendation the revised draft would therefore be sent to letter ballot of the section- al committee for approval and recommendation to the ASA Following e Appointment of Subcommittee to Check Chemical and Physical Data discussion at the Executive Committee meeting the Chairman had appointed Dr. Johnston end Kr Stratton to serve as a subcommittee to check the chemical and physical properties given in the various proposed standards when any of the values were questioned and to arrange all such data in a uniform method The Secretary reported that Dr. McCord had raised tion of standardizing the form in which bibliographies were the proposed standards the quesgiven in seconded After discussion and upon motion by Dr. it was unanimously Foulger duly VOTED that this subcommittee also be authorized to set up the bibliographies appearing in the proposed standards in accordance with the form used in the Chemical Abstracts of the American Chemical Society SUTO020 I sad Q e a 5 a, 237/91 December 11 1941 ( Later proposed drafts Mr. Stratton be in the meeting the question of properly editing the was discussed It was agreed that Dr. Johnston and requested to add editing to their duties in order that the proposed standards might be kept uniform 28 The standards 36. Report on Status Secretary reported on as follows of Proposed Emergency Standards Min the status of the proposed emergency a American Cadmium November , would be sent Defense Emergency Standard Allowable Concentration of . This standard had been approved by the ASA on 1941. Copies would be available within a short time and to members of the committee ASA Note Subsequently under date of December 17 1941 the above standard was mailed to members alternates and cooperating organizations on the sectional committee 237/73 b Proposed American Emergency Standard Allowable Concentration of Acetone ) Dr. Mccord had developed the oreliminary draft of ~ ^ is proposed standard which had been circulated for comment and criticism to the sectional committee in June 1941. Three members had objected to the allowable concentration These objections had been considered at the meeting of the Executive Committee in July 1941. Representatives of manufacturers of materials principally rayon which involved the use of large quantities of acetone had been present at the Executive Committee meeting and had offered ob- jections to the proposed concentration and challenged the need for the establishment of a standard The Executive Committee had decided that a revised draft should be prepared incorporating certain revisions agreed upon at the meeting The sectional committee had voted as follows on the proposed revised draft 6 affirmative 18 negative 2 not voting 2 ballots not returned Following a short discussion it was agreed that the vote of the committee by ballot would prevail Ether c Proposed American Emergency Standard Allowable Concentration of Diethyl 237755 Dr. Haggard had been assigned the develop- ment of the preliminary draft which had been circulated to the sec- tional committee for comment and criticism under date of May 28 1941 20 members of the committee had commented on the draft by June 16 with only two registering objections The U. 8. Fublic Health Service had questioned the basis of the proposed concentration and had later deolded to approve the draft with the understanding that the standard would be revised as soon as more information was available and Dr. Foulger had raised objections to the development of the standard as well as the concentration and had requested that it be held in abeyance until he could obtain information from various companiea manufacturing smokeless powder SUTO020_ ~ . ~~ 6 237/91 December 11 1941 The proposed draft and objections had been discussed at the meeting of the Executive Committee in July 1941 and the committee had voted to request Dr. Foulger to confer with Dr. Haggard concerning the data which he was collecting from the manufacturing companies Copies of subsequent oorrespondence had been circulated to the sectional committee under dates of September 10 1941 237/71 and November 18 1941 237/76 The need for such a proposed standard was discussed at considerable length Finally upon motion by Dr. Foulger seconded by Mr. Whiting it was unanimously VOTED that the proposed standard and comments received be referred to a subcommittee for consideration and recommendations to the sectional committee The Chairman said he would appoint Dr. Haggard to the subcommittee Neal Dr. Foulger and Dr. d Manganese Min 28 The Secretary reported that the first draft of the proposed American Defense Emergency Standard Allowable Concen- tration of Manganese 237/68 had been circulated to the committee for comment and criticism under date of August 22 1941. After several follow letters twenty members and two alternate mem- bers of the committee had replied while five members had not replied Eight organizations and individuals outside the canvassed upon request from committee members committee had been Comments had been received from several of these groups It was planned to send all comments to the U. S. Public Health Service for consideration in re- vising the draft be necessary the It it report was found that no extensive revisions would of the canvass together with the revisions made by the Public Health Service would be forwarded to the Safety Code Correlating Committee for recommendations on approval In case the Public Health Service would make extensive revisions in the draft the revised draft would again be circulated to the committee e Proposed American Emergency Standard Allowable Concentration of of Xylol Dr. Greenburg had prepared a preliminary dreft of the proposed standard on xylene xylol which would be circulated to the committee for comment and criticism as soon as the canvass had been completed on the proposed manganese standard The committee discussed various types of questionnaires which might be circulated with proposed emergency standards to expedite replies It was finally agreed that a questionnaire similer to those used by the National Safety Council in circulating drafts of Safe Practices Pamphlets and Industrial Data Sheets should be prepared for use in obtaining comments and criticisms on this proposed draft SUTO020 _ -T- 237/91 December 11 1941 Proposed American Standard Allowable Concentration of 37. Toluene Min 57. Dr. Greenburg said that since he had prepared the preliminary draft of this pronored standard the New York Department of Labor had carried on extensive work in connection with this sub- stance having examined some 200 workers in one of the airplane plants in the state He now believed that the proposed concentration could reasonably be raised without endangering the health of workers He requested that the draft be referred back for revision before being circulated Following a brief discussion and upon seconded by Hr Stratton it was unanimously motion by Dr. Foulger VOTED that the proposed draft be referred to a subcommittee for consideration revision and recommendation to the sectional com- mittee NOTE Subsequent to the meeting the Chairman following subcommittee Dr. Greenburg Dr. Adams Dr. Neal and Dr. hrank appointed Chairman the of 38. Proposed American Standard ITY Concentration pred^-ary pred^-arydraft of this Formaldehyde Dr. Gray had developed the committee standard which had been circulated to the sectional proposed on November 27 1941 Z37 with a request for comments and criti- cism Very fev comments had been received prior to the meeting but those on record were presented by the Secretary Following a brief discussion it was agreed that the draft of the proposed standard together with comments presented should be referred to a subcommittee composed of Dr. Gray Chairman Kesers E. C. Barnes Westinghouse and B. D. Tebbens General Electric Revised draft would be prepared and circulated for comment and criticism American Standard Allowable Concentration of 39. Proposed Tetrachloride The Secretary reported that in accordance with Carbon the discussion at the Executive Committee meeting held last July the U. S. Public Health Service had egain revised the draft of this pro- posed standard which had been circulated to the committee and others for comments and criticism on November 27 1941 237/81 A number of comments had been received and while there had been no objections to the allowable concentration it would seem desirable that other criticisms be considered After discussion and upon motion by Kr Paine by Mr. Whiting it was unanimously seconded VOTED that the Chairman be authorized to appoint a subcommittee to study the revised draft SUTO020 |G is 3% -8- 237/91 December 11 1941 and the comments received and to prepare a final draft for consideration of the Beotional committen It was agreed that if the subcommittee could resolve all controversial points with unanimour agrescens upon completion of its investigations the final draft of the standard shorld be sent to letter ballot of the sectional committee for approval and recommendation to the ASA as American Standard NOTE Subsequent to the meeting the Chairman appointed the following subcommittee Dr von Oettingen Chairman Dr. Gray Dr. D. D. Irish Dev Chemical Company Midland Mich Mr. F. 9. Low Westvaco Chlorine Products Corp. New York City Mercury 40. Proposed American Standard Allowable Concentration of The Secretary reported that the latest revision of the draft of this proposed standard had been circulated to the committee on November 27 1941 237/82 Only one member had sent in comments - Dr. Haggard had suggested under date of December 1 1941 In the draft on mercury it might be vivisable to state also the vapor pressure at some terzollte higher than 20 degrees to emphasize the rapid rise . vapor pressure with summer terperature terperature In section 2.3 of the same draft the seems to me a little awkward Could opening sentence it not start Mercury may enter the body ..... Each of these points was discussed and without formal motion it was agreed that the suggestions should be incorporated in a revised draft Upon motion by Mr. unanimously Stratton duly seconded . it was VOTED that with the hinged agreed wood the pro- Dosed tandardbe se io ette ette ballot of the sectional committee for approval and recommendation to the ASA for auproval as American Standard 41 Proposed American Standard Allowable Concertration of Chromic Acid and dozates The Secretary said that the latest revised draft of this proposed standard had been circulated to the committee on December 3 1941 237/84 There was considerable discussion concerning tion or material should be included in paragraph 2.2 agreed that paragraph 2.2 should start with the fourth what informa- It was finally sentence of \ ae SUTO020 _ - we -2- 237/91 December 11 1941 Daragraph 2.1 in the draft under the properties of pure chromium discussion chromic Insteed of Annydride including potassium chromate and potassium dichromate as in the draft under discussion a paragraph similar to the following should be included The principle compounds of chromium to which this code Dertains are chronic cold anhydride potassium cnromate and dichromate sodium chromate and dichromate ammonium chromate calcium chrouste etc. The physical and onemical properties of curomic acid and chromates may be Found in standard text books 7+ was also suggested that the purpose of the standard aS given in 1.2 might include or dust from chrometes of alkali or ilkaline earth It was agreed that members or the committee should be given further opportunity to submit comments since the craft had not been circulated sufficiently in advance of the meeting to teruit detailed study Soon motion by Dr. unanimously Greenburg culy seconded it was TOTED that following the revisions as sugrested and in the event no further comments are received the letter ballot revised draft be of the sectional submitted committee to for approval and recommendation to the ASA for approval as American Standard 42 Proposed American Standard Allowable Concentration or Lead Min 30 The Secretary reported that the latest revision of This proposed standard had been circulated to the committee on December 3 1941 237/85 A few comments had been received from Mr. G. E. Behr of the National Lead Company These were presented to the committee Following lengthy discussion concerning whether a general standard should be such as the present draft dealing completed or whether a number of with all lead compounds standards snould be dew - veloped dealing with the various compounds grouped according to their toxicity upon motion by Dr. McCord seconded by Dr. Foulger it was nanimously VOTED that the scope of the present standard under consideration be limited to lead Lead oxides and hydrated lead oxides _ SUTO020 1 i ... ~ -1 037/91 December 11 1941 Upon motion by Dr. unanimously Neal seconded by Dr. ~e McCord it was VOTED that with the revisions necessary to comply with the restricted scope proposed standard be submitted to ballot of the sectional committee the letter for aporoval and for approval recommendation to the as American Standard ASA Upon motion by Mr. unanimously Paine seconded by Dr. : Neal it was VOTED that the Chairman be authorized to appoint ^ subcommittee to consider other lead con- pounds from the viewpoint of preparation or standards - those compounds selected as having the same toxicity as covered by the present standard to oe included in a re- vision of that standard others to be de- reloped into separate standards NOTE Subsequent to the meeting the Chairman appointed the following subcommittees Dr. Neal Chairman Dr. Gordon C. Harrold Industrial Hygiene Laboratory Chrysler Corporation Dr. R. A. Kehoe Kettering Laboratory of Applied Physiology University of Cincinnati and Mr. Stratton 43 Status of Work on Subjects Selected for Proposed Standards kin.22 kin.22 The Secretary reported on the status of the various subjects unich nad been selected for proposed standards ana assigned to members of the committee for development a Trichlor Ethylene and Tetrachlor Ethylene Mr. Philip Drinker had been requested to develop preliminary draft standards on these subjects but because of the heavy pressure of his work had been unable to do so He had recently surrested in letter that preparation of the draft might be assigned to someone else After discussion it was agreed that since these substances vere of considerable interest it would be well to set up a subCOfi- mittee to determine whether or not standarcs should be geveloped on these subjects and to produce drafts or reports depending on its decision It was furt agreed that Mr. Philip Drinker nould be requested to ect as chairman with ~ F. S. Lov Westvaco Chlorine Products Corporation Captain R. C. Bedwell Nedical Corps U. 3 Army and a representative of the Navy Department to comprise the subcommittee SUTO020 | 17 fi" fl fi" -~ 11 - 237/91 December 11 1941 b Methanol Dr. Schrenk had accepted the responsibility for developing a preliminary craft on this substance It was suggested that a subcommittee night assist him in this work and the Chairman was authorized to appoint such a subcommittee NOTE Subsequent to the meeting the Chairman appointed the following subcommittee Dr. C. P. McCord Dr. H. Dr. H. H. Schrenk N. Haggard and Dr. Chairman A.G.Cranch c Hydroflouric Acid Fr. Manfred develop a preliminary draft standard not replied to the request Bowditch had been on this substance requested to out he nad Discussion brought out the fact that a large amount of this acid was being used in connection with aluminum welding and in the manufacture of stainless steel A number of states nad also adopted limits for this substance Finally upon motion by Mr. it was unanimously Stratton seconded by Dr. Gray TOTED that this subject be referred to a subcommittes to study the desirability of formulating a standard on hydrorlouric acid and report to the sectional committee on its findings NOTE Subsequent to the meeting the Chairman appointed the following subcommittee Mr. Manfred Bowditch Chairman Dr. Willard Machle Kettering Laboratory of Applied Physiology University of Cincinnati Dr. F.C. Frary Director of Research Aluminum Company or America and Mr. Underwood International Salt Company d Silica and Other Dusts Dr. Gardner who had been requested to develop a preliminary draft on silica presented a memorandum on the subject which had been approved by Dr. Lanza and Dr. Jayers After full discussion of whether or not it would be possible to formulate a standard at this time it was agreed that the Chairman should appoint a subcommittee to develop a report similer in content to a report previously prepared for the Air Hygiene Foundation by a committee of which Dr. Lanza had been Chairman It was also agreed that this report should be presented in a form similar to the stand- ards being developed by this sectional committee though without the preciseness to which drafts now under consideration had been held This report might later be used as the oasis of a standard NOTE Subsequent to the meeting the Chairman appointed the following subcommittee Dr. Gardner Chair- man Dr. Donald H. Cummings University of 3 Colorado Medical School Dr. Gray Sr. Greenburg Mr. Theodore Hatch Dr. Lanza and Dr. Neal . SUTO020 ir ' ~ 12 - 037/91 December 11 1941 14. Additions presented a request from to Membership Min 11 The Secretary the interntional Acetylene Association for Sembership on the sectional committee After a19cussion it was agreed that this request might well be treated in the same manner as the previous request of the American Welding Society in that both these organizations while definitely interested in some of the sub- stances under discussion would not be interested in the broad program of the committee Upon motion by Dr. unanimously Johnston seconded by Dr. Gardner it was RESOLVED that copies of all draft standards developed by the committee be sent to the International Acetylene Association for review comment and criticism and that the International Acetylene Association be cordially invited to send a representative to sectional committee meetings to present its points of view on those proposed standards in which it is interested The Secretary mentioned that Dr. A. G. Cranch nad been suggested as a representative for the International Acetylene Association The Chairman auggested that since Dr. Cranch had broad experience as an industrial toxicologist and acted in a consulting capacity to number of large organizations it might be well to invite him to become a Member on the committee Upon motion by Mr. nanimously Stratton seconded by Dr. Neal it was TOTED that the American Standards Association be requested to invite Dr. A. G. Cranen Industrial Toxicologist Union Carbide & Carbon Corporation 30 East 42nd Street New York to become a Member of the Sectional Committee on Allowable Con- centratoi f oTonxs ic Dusts and Gases - Z37 The Secretary announced that the Army and Navy Departments ^ ad expressed some interest in various standeras under consideration 37 this committee and had requested that representatives oe allowed to attend this meeting This request had been granted After brief discussion and upon motion by Mr. seconded by Dr. Neal it was unanimously Stratton SUTO020 {2 =. aan Jig VOTED 63 237/91 December 11 1941 that the American Standards Association be requested to invite the Up Army and U. 3 Navy Departments to appoint representatives to the Sectional Committee on Allorable Concentrations of Toxic Dusts and Grees - 237 The Secretary presented a request from the Air Hygiene Foundation to the President of the ASA for official representation on the sectional number of the committee which stated in members of the Foundation substance that were members of althougn a the committee including the Chairman it was believed desirable that the Foundation be directly represented should Following discussion it was agreed that contact the Foundation to obtain additional the Secretary information on two points the procedure available to the Foundation for octaining a consensus of opinion of its members on the proposals of the commitSee and a list or the organizations which were renresented both in the Foundation and on this sectional committee When this information had been obtained the request of the Foundation would be given further consideration by the committee The Secretary mentioned that at a previous meeting of the Committee it had been voted to invite the Keourn Laboratories to become a cooperating organization This action hed been based on misinformation as it had been intended that Dr. R. A. Kehoe or the Kettering Laboratories be invited to become a Nember Upon motion by Mr. unanimously Whiting seconded by Dr. Neal it was 70TED that the American Standards Association be requested to invite Dr. R. A. Kehoe of the Hettering Laboratories of Applied Physiology Medical College University of Cincinnati to become a Member of the Sectional Committee on Allowable Concentrations Toxic Duets and Gases - 237 45 Proposed wording of Paragraon 3.1 on Allowable Concentration Min 6,18,29 The Secretary reported that Mr. E. 0 Barnes of Westinghouse Electric and Manufacturing Company and the Chairman of this committee Mr. Yant had both sent in sugestions that the wording of paragraph 3.1 be examined or the committee to see if the intent of the application of the allowable concentration could be clarified According the requirement could be to the wording interpreted as now used for meaning that this paragraph at no time a worker could be exposed to a concentration creater than the allowable concentration set up whereas than the figure set up in the it might standard be that a concentration greater could be found for two or three short periods of five to ten minutes each during the day If a sample SUTO020| 4! a} { 4 L canine 1 ie, -~ 14- 337/91 December 11 1941 of air was taken at those specific perioda the plant might be penalized as not complying with the standard Dr. Johnston suggested that paregraph 4.1 d which required that a number of samples of air should be taken to snow whatever differences in concentration exist auring the working period would tand to alleviate this difficulty After referred to the 21 for advice discussion it was agreed that this matter should be ASA Emergency Technical Committee on Quality Control- 16 Adjournment The meeting adjourned at 5:15 p.m. subject to the call of the Chair Reported by Burke 2.Bowlby 2.Bowlby JYRIL AINSWORTH Recording Secretary SUTO020 fi _ ee we AMERICAN STANDARDS ASSOCIATION * WEST THIRTY STREET NEW YORK ~ ASA 137/117 April 9. 1947 ASA MINUTES COMMITTED ON ALLOWABLE CONCENTRATIONS OF TOXIC DUSTS AND GASIS - 237 November 23 -942 Subject to Confirmation The meeting was ceiled to order by the Cheirmen <r 10 In Room 903 of the Engineering Societies Building 19 West 3th New York p.m. Street Present Tant 7 7. Chmn Member Heimann -. IAIAPC -d^,ms Jamer . API Representing L Creanourg Bloomfield J. J. APHA Johnston John Cranch A. G. (Member McCord Orrey P. Insminger G. 3 Far Dept. Neel Deul A. Grey Albert S. CSPHA of NA Paine Welter S. Alternate for H. 3. Caborn Schrenk H. H. Hemilton Alice US Dept. or Labor Snell Myron A. Member) AA or 1745 USFHS) SC US Bur of Mines ( SE Stratton Reuel C. AICE dough Ferren A. Alternate Association or Casualty & Executives Irish D. D. Dow Chemical Company Low Frank S. Westveco Chlorine Products Corporation Surety Ainsworth Ovril Secretery Lamb Henry G. ASA strff Abgent wditch enfred IAGLO Sulger John H. CA or US Anker Cecil Yember Dinker Philip Member Gardner Leroy U. Member Nagard Horverd H. Member ch Theodore Member Henderson Wendell Keloe Robert A. Hember Lanza ... vu, Member Large Sehl fF. 7, Member Selby > J. Nomber) von Oettingen W. Member ~ Vosburgn . I Member Fatson Thiting 3. 2 Member) NANCE L in SUTO020 weee ee 3 ~ ~ 657/117 657/117 April 9 1990 J. Approval of minutes Th: r--oet o. tae antia si Recenser 11 1945 1 (23 ae eur e 011 cue. Let. 1 48. Proposed wit wit ice no okt es Chromic Chromic Acia .ra ncentrtion of vom wc sea, FPoosse a SOT * 1102011020 py rar Tt an on TUE oPnublic fel the U. 6. caron10 vcta cn. caro merita bervice and sent sae to on a vote 2 0, wer. OE tii on te r Ue 77% ttm s^ ov 22 1 aot 14 1942 2nd been exproved by a ide jority 26 blta Goael, oe me totel Committee menper^/in of 31 -2 mia voted Ill ly one negatively and two a ^ not returned bellots es pemorten in Arenal Letter 257/103 The two stoncords were being reviewed from S proce Aural stend oint by the Executive Committee Committee of the befety -o e Con- relating Committee ith view to recommending them for fg5 NOTE both standards more approved as American staaward 28 01 January 6 1943 49. Proposu American Standard allowable Ty , Nitrous ses Min 06 ^/_ cecety, : amena tion or te Executive committee --see and revised ana limited to been nitrogen figure figure of 50 ppa The draft centration of the comittee in august 154 attention as crown to letuar ented September September 0 161 from J. H. Fouiger presenting objections to 149 S075ird es p107088 Dr. Foul n^,d expressed the opinion that the question of co_bound exdosures shoull be then into account as well as incrersed suscen- ibility due to previous exo84523 He had stated that studis de under his direction and indicated that following exposures to such lower concentr tions definite cunges in thin the the lun ^ proposed proposed c S ell pe a pm there tendency collapse Dr. Foulger's referta ned corcluded math nat been proluce to circlitory circlitory t.- recommendation that the sender be limited to electric -sl fag 24 ' nd the permissible concentration reduced to 75 ppm Following general circulation several demers had expre670 expre670 expre670 22 . another of Dr. Foulger's contentione contentione g to its centebility centebility 28 escribed 2 further consideration consideration ofthe dreft I this mre : letter 337/100 > Dr. LeCord declared that the Committee roul Ja in in ifficultis if it sttested to set up sete straacrig ior 315 substances on the basis of their presence in indiri- ceoolressea oF industries Other members entorsed this opinion Ir. . ceas55 50 Of ind stated that in a revie recent liters ture ne 2 notice Laposition to repera nitrosen ioxide as leas ^ ngerou 2. 1. d been shougnt and therefore believebd elieved it could be eaten eaten in "..2 mong dire concentration tion to reduce the evidence so inlier ting concentration unless the Com.ittee Com.ittee . 2 inite a a SUTO02=0cod In ~dk. - - 337/117 loril 9 1343 Committee JEPS or discussion A A brief discussion should not attempt to develop this develop ~e PS xtc 4s 1 ille 1027 i ow _oo ered 2.3 ... 7 . 2 . Tr Tl ny other thin wa Fr a attthatthethe ixed 36 ixed CS ses Dr. Neal believe Dr. Foulder's conic shbull - considered un the S tile 11 nt of nis present time au sortim detai 20V F 2. s not possible as the detrils and not been published or mode Svilpole to the committee Soon motion by Dr. Johnston seconded by Dr. Sonreri 1% 08 in nimously VOTED Lt thet further consideration OI the propoSFC of atander until o.. for nitron dioxide de deferfol investigating subcommittee could confer ith Dr. Joulger to racert in on what exposures methods of test eto 18 statemensttatemsents were 820 its 11 committee would then report ca 213 ran? 3 and consequent recommendations recommendations <3 le : 1 Committee . The Chairmen named Dra Ledord onfirman dranon ng Schrenk ca en investi subcommittee with the reci and tion that they endesvor to prepare the desired report by January 15 A Q recalled 30. that Arsenic Antimony it the moitteismoitteis at Zinc in 55 ) direction the Chairman Hr Ainaror has ppointed Ors Nerl cnciruen -rinter and ledord 3 9 special auscom for Investigate the desire 26/97intimony senio The subcommittee's or stond on ine emont circul 3 ittee to intimony and and been nanimous on the inc Drs he 1 undesirability end Lodord des issuing of F- e- standards for entizony and 2 10.ity Jaco . 1ch for renaration of a ver stradord on senic fron Lion Dr. Drinker lad issented Dr. Neal inc standard na nation on in to elt bervice aling explained that there 7. that there 5-9 insufficient set 7 tendera for antimony aling a long time study of aling = To authoritive 4tthe The sectional committee concurrence with Joth recom enations the meeting and of letter This SA NOTE In accordance with the Committee's reson mendation the airmen of the St Council subsequently orized the veloc ; the ment of the Wor propose .fsenic standards Prosaure sicnacrl, 2.247 3 , \ SUTO020 1 5 = ee wif t 2. 127/117 127/117 AprilApril 3 1043 1043 Upon motion by Dr. cord 2-57 seconded it re uneniously VOTED At the subcom.ittes insti desirability of stenosis on zinc and crsenic ce disc ^ Dielinirny ConLitter 708 reported s detailed detailed in 257/107 crsenic draft maion had seen as vin met ith a y oddetree 1. ninarorth resa excerpts circuited to the detree of scentonce from - ber of Lettere Amgenic Iron nufccturers of orgentes decrying the apen oor orn standard and at tin shot the posed atonaeri vouin linose an then on unnecessary hardship I 73 co ented .. dt dt de Sojections deemed in tile 3 tir ^ ort in event ingenucha ingenucha tile stendard ^'idnot ^/erl with sen C2Bsen C2B though incustrips The Carion certain good r^ 1500 etic point of viam incustrips 21 ut ce euccessfully controlling ht toxic substance Core have some the hot requined th tt 5 established figure of control toxic oni should there- Mr. Bloomfield noted that the ce needed es evidenced by the inquiries Section USPHS received on the subject arsenic standard -peared -peared -peared to in the state Relationa The Secretary enid tust a nuiser of melbere nec returned qualified tive votes affirm approving the concentration concentration be mised approving to 1.5 the drait ppm frol the with the proviso that i pom experring experring in the draft This change lind previously been recouendre > the Executive Committee Upon motion of Dr. unanimously Ne 1 seconds by Dr. Orion it it was TOTED that the permissible concentr tion iven in the draft standara Alle Alle Concentration of Arsenic be set at 1.5 opm standard It was pointed out that this was to be reconsidered at the end or proposes only as a tthhe e v v r duption duption The committes endorsed cestions e from Dr. Johnston mat the parenthetical parose colculed colculed as As ce inserted -lfter ine words ment and #senic trioxide in section b from Dr. Scared that the _.1, the title ve concretion stateonenged to Alli Alli Concentr tion of arsenic 2cArsenic ix SUTO020 in - 17-1 507/117 April 9 1943 2.2 the The Editorial Committer Physical Properties stenard would be submitted to as as requested in tabular letter to reerrance Section form With such changes ASA NOTE This has since ogen done 51. New Skelet Format for Frelininery Draft Standards Concern wee expressed over the amount of time ona work which ard gone into the preparation of successive revisions of damit stensibus in A number of crees only to be linclly discorded Sr. Jouneton person at the besic part of the 237 stancerde wee section 3 the concen- tiation statement plus section 2 the scope strtement e rest of Le standerds was of a much less controversial nature It s Ais idea therefore tart in future os imments the Authors predale -18 A first preliminarpreliyminary creit no more tuen a precise statement of sco and a proposed permissible concentr tion ncethese major major points nac been agreed on the other sections could be rated to make a complete iraft This suggestion was brief discussion upon motion field it was unanimously enthusiastically by Dr. Johnston received en aiter seconda oy hr Bloom- ICTED that future first drafts be premored to consist of only the two orsic sections 2 statement of scope and 3 proposed allowable concenision concenision to be supplemented by additional sections sections dere of acceptance tro acceptance major major as indicated resched on the or the first merious 52 Status or projects tra Subcom itter Assignments The et sue reported rs covered by minutes 53 to of the 62 Anel sWA 53. 53. Proposed American scr standard Allorable Concentration of Diethyl Ether ry nion n^^ is Foulker cneirnen ..in 33 cl Toe secret reviered the circuistences to the appointment of a subcommittee of Drs 1 end Hay ard to make recomendations recomendations recomendations for the alethyl Disposition of the proposed mar standard for of a proposed final dreft st^,nderd prepared by Dr. ether Menor Menor Sirculation acs You Erotests iron manufacturers of sozeless noraer inclusin and lavy who had objected to the proposed concentration 9 ANDY 5 "2Lil es . issuance of the the nucture of stenderd on the grouNT smokeless porder h3 it would inter -- 77. Negl soid that the submitte submitte submitte .. the opinion of many authorities thst existing literature sufilcient inioration as to wrtwrt constitited a concentration of diethyl ether as Dr. Regter SUTO020 {j7 17 217/117 wril wril 2 1740 - term fail permissible concentr tion might not onl cover concen trations not injurious to health out also then concentrations oe ' ould concentrations not interiere not renser ersons more prone to clients information vith red to concentr tions Unfortunet 1s aion would would there 116 ith alertness muscular coordinction coordinction. nd other factors essentiel for safety in nezardous oper tions The subcommittee hod examined field studies millon reverled progress in fanufacture the control of diethyl ether exposures during the past several contus sots in stokeless powder som: -atebena Industrial plants were endesvoria Jossible under ar conditions ft 50 120p exposure 73 117 -g 19 understood turt 11.ic studies of the exposure would continue oF. -al how bein collected would provide - 07618 as unlikely that the work of correction correction cnticipated t.. 0 the reta for e standart , lthough it could be done until after the war the 237 The subcommittee committee costpone had the therefore unanimously recomended recomended that est<olishment of a maximum allowable concentr tion of diethyl ether Upon notion by Dr. Johnston seconded byDr. scarenz 2% ni cously VOTED to accept the report of and to recomiend to the Allowable Concentration Concentration the special subcor ittee Abs that the proposed of Diethyl Ether of dis- project continued es a Mer Standards its development under the relor relor ana that proceduz , e tabled until scequate di on which to b se such a stenderu mi at de sv ilable ASA NOTE In accordance with the committee's rec D . a oN ' subsequently we mendation Council the Chairman of the Standords Chairman withdre the proposed diethyl ether standard from under the r Standards Procedure 54. Proposed American vcr Stenford allyl Concentration a of Xylene Criticis's Criticis's 36 e ir Aine orta report e cr resulting from circul tion of inst inst ote 2 o`ylene been assembled and relayed to the author Dr. Gert 3, ts and o`ylene nad come months 100. It ras remorized that this substance wrs OI wonsei > Die intereat - present because of its use A F substitute for moie oricsocld Haterials ourg the needed Chairman The Chairman requeste Dr. Heimenn to committesi consensua that thatthat that the xylene SUTO020 J): (hit ^' Varbon the Triclorice .in 25. 25. ProposedProposed Triclorice Triclorice Proposed Azeric2 urda subcommitte enim Dr. ae Cerbon tetreculorice and completed therewith submitted forfor the the the consideretion The Chairman commented commented upon the the the considerable that had been done on this subject and asked Dr. .. el Dr. von Cettingen the Committee'a thanks count of Te colvay Work to In reply to an inquiry on this point ip Lo the subcommittee had by Dr. Elkins of the whichwould indicate publis.led given given given tention to some recently Hassachusetts Hassachusetts Division of that the proposed concentration of 100 100 high not conclusive however the subcommittee Decause the report nended been ned considered silent as to sampling and the method or anrlysis Mr.Mr. Low seld that the SUDCO- littee had iven the draft very careful and and and thou,,thaoutf,,ualtful attention attention and intil more definite information was produced was prepared to upon the 100 ppm There was nothing to prevent modifier tion Nevidence so indicated indicated Dr. Heimann outlined some departmental work * 3 nich he believed the proposed limit anould be lower His had indicated that concentrations concentrations of betreen approximately 480 480 ppm were capable of producing toxic symptome The subcommittee had tentatively supplemented the concentration concentration statement Section o of the draft providing for zaximum of 100 parte of carbon tetracaloride per 1,000,00 workinwg orking air by volume on the basis of an sight day by by following secondary statement Hiher Hiher concentrations or 1,00 1,000 1,000 parts liter per 1,000,000 parts of air oy volume corresponding to din din per liter at 25 G and 760 mm Hg may be tolerated for ff or fo o r r periopds eriods of -- hour Mr. Low explained it had been the intent thus thus to convey the iinformantion formation that a man might inhale as much as 1000 parts for noir hour without injurious results There was a lively discussion re to how to mord f1 section to bring out the sense of a nonogeneous manere Q.e eight- bour averege Desis nmu* been adopted with a vis to covering on Excesive Exposure for > brief and mordin seemed aeguste sorce of time The Secret out 7.Observed FIT stond- Observed =... 0 his difficulty and been discussed at referred to the asa Committee on at work on the problem and would the list mastin , list quality to report Control ~ the 207 3it wea been 21 ~1on 3 Com now Dr. Cranch commented that differentiating between el 2. hour and limited exposures called for .ce could core core four or five minutes of narcotic on extremely nigh concentration could be Mr. Bloout'i remerged that the mornin 1-1 1-1 29 oposed mould permit of several aclf exposures of 1,000 p Sai UTO020 3) 5 Lor 5 lias 5 ... , d 207/117 207/117 April 3 1045 the the The Chairman -quested that reers Lom Grey na Irish or subcor litter on caroon tetraonioride lunon period prepare a ~ remordin during Dr. NoCord expressed disertist with the wording of section 7.0 es proposed which rend | In high trations caroon tetraclorine s narcotic sufficiently penis sill inr enloroform Continued exposure to lower concentr tios concento use no narcosis but which cre ni her turn 100 pts per illion will cause irvitation of the mucuous membres and my led led to injurt di liver or zidneys Dr. Record stated tart though croon croon tetrelloride res a respiratory respiratory irritant in reboits he believed it and no such effects nen pure on hwurn beings he therefore reierned at this st te st te - ment be deleted if the committee so reed Dr. Hilton commented that previously commercial corbon tetrachloride sometimes and free hydrochloric hydrochloric acid to ion such irritation might be attributed to which Dr. _cCord replied that that was the origin of the irritation celief committee The Chairman asked the to consider this point members of the carbon tetrachloride niso during their luncheon session After the noon recess ir Lov reported tetrachlorite group and agreed upon the following .om the lloble concentration section that the carbon recommended rerording 1 23.1 The axinum allowable concentration tetrachloride shall be 100 concentration of e rbon parts per 1,000,000 parts of air by volume corlesnoncia to 0.5 - per liter at 25 0 and 760 mm Hg for exposures not exceeding a total or 3 hours daily Brief exosures to somewhat hisner concentr tions arising from accidents or ener ency provided higher concentrations do not mise the drily average poove 100 arts per million are not considered as being injurious such They also recommended the follo in in sentence regarding toxic properties Continuvi concentrations hich cause no roosis out union lieu of the disputed exposure to lomer one li 1er than ico parts per million may do norm to the iler end kid Both auestions auestions were recented by the 005 > 7) , notion of Dr. Johnston seconded . Dr. Schrens its nimbusly , VOTED that with the mendmente reed upon in the meeting the Craft standerd allorople Concentration of Coroon etc..lorine be submitted to letter billot of the sectional committee eee) SUTO020 _ 197/217 Abril 9 220 -3- ADA { ( { { NOTE - At the sugestion of i we comerci 7 interest and hea is. anonimous consent of the dreftin subcom ittee teomins teomins teomins j of section .. Ply 11-1-1 10-1 Frage = j has been sono sono sono debe 1707 0..e + ; in which it so so in lly pusmit ad. ot TF : pusmit : 4 . meeting This counts for the 1 in carrying out the recomended recomended ction Stentera 5. Proposed American Stentera alloreale Consen Consortion of Formidele in 5 20. Gray on irnen menort fab oe wee= 343- committer ad formeldenyde ned considered the com ents resulting from circul tion of the preliminary drart de reviewed a a report on observations of renctions to exposure of various formeldenyde con- centrations which had uren mide sy 2. Srnes Srnes of the su comiittee su comiittee tat 4. Barnes report had concluded tat concentrations betreen 10 and 10 ppm exerted definitely irritating property and recom ended that erever possible the concentr not exceed 10 ppn The 34000- wittee therefore tent tively proposed for discussion o concentration limit of l opo Fr. Neel remarked that irritation respiratory respiratory tract occurred at a point Selor of the eyes 77c unper 5 toxic concentrat105 .r Yent opined th t when the concentr tion got to the point of noticeable irritation irritation worli would contle lis live that once it was below the ron ta or sistemic sistemic ellect re 15 no cause for worry In conclusion Dr. Grid Grid he hoped to su within a fer reekb mit ~ nem draft 57. Proposed Aeric nitencard nitencard Hydrofluoric acid Ila eftdey ftdy meet the ing the committe ad eurest won to assist . Borditch no na cee& draft stonderd nitencard Allowable Concentration of meet meet meet meet its previous meet- e ointment of - subcommittee need e ointment to to prepare prepare a preliminary Ors Granch Willar appointments to the subcon Commitch their chairman c.tt, cA Fe Tn. and not ee fee 7. oe CIT pted =. oe 28. fa posen ade i~ anstenuna wD te eee Le Lead and wen Lead and Lend Oxides Min = coe ete Teo Des. Se lee "ITS /thew sec F^,r 12n and cone sia S ce i 11 1940 in pre rin Lour 820- cessive dr te in rocorunce + ar 181 id 181 wie the dom ~- the dom lead strn^' mittee are to t should be covered covered covered of the the lead lead strn^' r strn^' r Rec Rec Rec the commitiet could rive at conclusive conclusive decisiodecision n in this teeting 29. Heel ^rer attention to is onsineip to study le compounds nich anu been e com ltjecision that the curently curently proposed to metallic ler^ lead oxides 1: Jotel } SUTO020 ~e i? ee _. 207/117 April 9 10-8 -~ 10 to the conclusion titt en one undertook to fifferenfti ifferenti te dete in the rious conounce in 11 their i Zine de pers of toxicit 2% becue a bit ridiculous Iron , or-olac 1 stint stint stint ^ discussion of the 1- ^ contounts 22, 1 3 roubin _ those of the sole range of toxicity in the one t -- aLwviad 08 , foliora The previous decision to drop lena f.enctF 3 158 07 i insuriicient inform tion on which to set o emissible conuention 1 mas confirmed The sulphide and silicatsileicate repeto repeto Os pt out beenuse of thier insolubility and slow action It g lso cene unc98ay to include the titans eliminated eliminated at Dr. Cord's request the cure cure 78 Upon motion by Dr. Johnston unanimously seconded of 2. Shell it ne VOTED inorganic com that the proposed le ^ ateneord cooly to led and its besic inorganic ounes the cerbonete sulph cxices nitrete and chloride It greed that sections 1.1 and 1.2 2 rewritten to name the various ounds coveted that Section 3 Permissible Concentration also be by the revised All spprrently of 1.5 milli ris per 10 specified revored the proposed cubic meters of air concentration fiture for the substr .ces that of Lerd ^ recom tion ond Certsin of Its the title be Alloable Concentr tion Inorganic Commounds Commounds was adopted Kr Bloomfield raised rustion rustion references over for the semblin actio Or Merl exould review the reference Fion rendily veil references to the mercy of the :21 cor -i tist 771: incluie to to louern The Chairmen observed that the ususual ual u and chemical 2.2 properties j rea of value to this perticular standaru on +1 201 no similia similia nt Unon motion by Dr. Nerl seconded by Dr. Jonnston it 28 unanimously VOTED That section w of the lead ft be brief confined to a descrition descrition of the toxic properties and so entitl Inclusion of a reference to the Intern tion`1 :1 I ales 788 recom ended | SUTO020 i: 17 UU lo -11- April 9 1943 csocom iot e mmittee's In accordance with the the the discners with thenke the socommittee socomite socommittee decision the Cheirmen toconsider the preparation of standards for lead compounds compounds 59 American Allowan Proposed Schrenk.enorted Standard - Hetrancl Dr. Schrenk.enorted Schrenk.enorted Schrenk.enortedthat cor 4 methenci hed repched a state of screement screement and that standerd would shortly be submitted ucF ommittee on atentative draft CASA : . : NOTE The first revised methenol draft 100 7FB subsequently circulated to the Committee and the State heelth erencies for comment and criticism and the resultent comments transmitted to the subcommittee Other The 60 Secretery Fropor d Report on Silica and Cuers ( in 3%, 1 announced that Dr. G^'raner committee chirmen Kai meeting written that he hea hored to submit a tentative araft st the but that circunstonoos bra interfered and it 23 Necessery Necessery to defer action until the subcommittee could m etFirin to to reconcile reconcile some differences of opinion , Trichlor 61. TetrachlToretrachlor Sthylene The Secretriv ennoured ennoured that Sthylene and Trichlor dr Sthylene 1 aeves Ethylene to .in -3 70> " as chairman of this eubcommitter Tollowing Lr Philip Grinder a declension ce- cause of the demands of other commitments dr Lo said he doubted there was sufficient information v ilehlon which to establish e etendard for trichlor ethylene end tetrachlor ethylene Although the effect of these materials on the hole wre 78 carbon fer es he more injurious injurious than cheerved with tetrachloride end a strnierd was re pware there wes not eveileble other hvarocarbons such undoubtedly needed SQ information as to what concentrations might cause e feeling which would lead to further exposures Enc <habit de rerconelly e inclined to consider 100 pom ap e maximum Allom^,ble concentration but did not believe that fisure could he eet ng estenderd estenderd end did not prove of setting up * stenderd without a background of factual information information renerell well Dr. Gray eccepted thought it might be quite justifiable to use the figure of 100 com which seemed to work out very Mr. Yant geid that e great many things must be decided on the basis of the best coinione and reasonable gupsses Terious States were getting up.numerous up.numerous stenuaras with nothing like the tecr- nical znowledge leadership in of this Committee and these matters it might Co wes if the have to mittee to so a little bit exert out on the limb There was a discussion of the cossibility of issuing docu- ments of centative or seconapry type in cfees were full stenderds ere not fossible Ar Ainsworth su rested that more mere the SUTO020 = UT ian 3 -12- 237/117 April c 1043 Committee Sveileble information seemed in^,teous ha Committee its mot 'riamot 'rlial f A proposed stones or F remort could tublish I I served to Mr. Bloomfield remrkel that have have no more becurround then the was v reposed arsenic stenaerd available in this cage for ^ r Indicated by the congngus congngus the Chairmen requested up for to endeavor to develop a stenarra for tstree ethylene and tri- chlor ethylene on the breis of the cyrileble information and litere- f ture keening in mind that if the subcommittee could not produc stenderd it should try to predere a report or helnful reconendations reconendations The Cheirmen noted that the letter treatment micht solve the handling of a number of similer situations Dr. Grey elieved it would serve to stimulate research medicel thetic Dr. WcCord suggested that the subcommittee look meterial based on the use of trichlor ethylene so trticulerly e Fritish mener by jackson into the en AmpA- 62. Proposed American Standard Allowable Concentration 4 Toluene in 37 TheSecretary folltho atwfoi lln owig ng of Greenburg'Gresnburg's completion of a preliminary arart be ned nexes for its return for revision on the besis of some new resserer rich indicated that the tentatively proposed concentration was too restrictive A aubcommittee had been appointed some months ago to arsist in orerer- ing the revision under Dr. Greenburg's chairmenshio W. Low rzed that it was important to atendera F quickly fs Doscible because toluen es more general use end would probably Bunplant benzol major degree compl the coming into much in industry to a 63. Sempling Frocedures In connection with the review of the leed dr^,ft there had been some discussion as to whether one stendard method of gemoling should be specified in detail or ziven by reference The Mr. Yant expressed 237 the stenaards were not consistent in this belief tret any good method should he regard adequete to determine the concentration within reasonable limite Any siven procedure would of course de dependent upon the technical competency of the person doing the gambling American Mr. Bloomfield drem ettention to the activities of the Public Health Association Subcommittee on Chemical Nothods in Air Anelvsis The Chairmen recommended that Jr. Schrenk no 726 a member of the AFHA committee discuss with Dr. Goldmen the chair- zan the possibility of directing their work to methods for incorporation in the Z37 stenieros subtly sampling Dr. Schrent surges that ee the APHA committee completed its work on subjects for ion ASA strncerca were already in existence the stineris ihr be re- Tiged to include the AFHA standard method or pelvis However Dr. Schrenk questioned crescribing one stancara method of onelvsis ren other methods might have equally good results SUTO020 ! } U5 t UB UB -13- -13- 037/117 April 9 1943 ** prre~ ~ that the Secret,, ryarould communicate with with DD rr .. Goldmen Chatomen of the Committee on Cherical Cherical Methods in Air Anelvsis with regard to a mossible cooterptive crrangement between ane the two committees ( ASA NOTE AOL Correspondence between the Secretory ena Dr. Goldmen nes resulted in a tentative Free sent for coordinsting coordinsting the progree of the ASA and APHA committees along the the lines 5 indiorted / fr 34 Applicability of Stenderds to Special Exposur s fr jeel Frised the question of whether these stands mere llcsple to omen and children This was en acute problem for the Children's Jureap f ieeder Dr. Hamilton said that bec end took in larger volumes of se eir immature individuele breathed in prorortion to body surface and weight and because their blood circulated more --eem that more poison would be absorbed in an equal repialv it would tize However studies mede in Boston and w York hed thrown a preet deel of doubt on the susceptibility of women elthour there wee the question of their periodically increased susceptibility to poisons with em- norhegic effects Dr. Nel observed observed that it might be resoned con- Temasly that because immature persons persons had better powers of eliminetion they might be less susceptible lem of actual hours Mr. Yent declared he would be more concerned about the proo- overtime effective say for men working working twelve expofures niht be doubled hours by the in which case the additional four seconded After by Dr. some further otgquesi^n unon WcCord it was unenimously unenimously motion by Dr. Neal VOTEVDOTED that the Chairman be authorized to appoint subcommittees 1 to consider the suscepti- bility of women and inmsturs persons to torie Tubstances in the air air of ork Disces and 2 2 to consider the question of prolonged exposures 55 Extension of Frogram The Chairman gered for any iders as to new subjects for the Committee's consideration among the sun- stences mentioned were ethylene dichloride propylene dichloride butadiene scrylonitrile styrene propane isoprene nitrile ..r Low stressed the need for a stanieri on and trichlorohexochlorethane Ar Bloomfield wondered hether consideretion had ever been given to developing standards for ective substances such 59 luminous peinte mich were coming into the cuestion more n more If vee remark that this would be a problem of noxious radiction not noxious fums The Chairmen declered that if the question were coming coming SUT0020 -14- 337/117 April 9 10-3 to the fork end if there The suitsbl suitsbl information information eveilrble The Committer should be el rt to 28 co niut niut niut the need for store- crus oi billevea the score of traject traject would cover this Dhage Dr. Nel said that it would be necesary to writ a wrile to et clin- lerl infora tion fro incustry but from the wey it was niline up that anould not be long styrene Dr. Irish recommended primeretion of A stingard for 19 * cuide to industry He leined that his organization and had aeverel ers of enimel rimentation but there was no clinical exocrience All eirced that the synthetic rubber h^^opened Up a new and coaperatively unexplored field Upon motion by Dr. nenimously Johnston seconded by Dr. Grey it whe VOTED that tion the establishment of allomable concentrestender^s for styrene monomer and scrvloni- trile he undertaken At the Cheirmen'e recuset Or Irish pareed to pren^,re # reliminery craft on styrene and Dr. Nel a drert on sorvlonitrile - By unenimous perpement the Chairmen mee authorized to appoint e subcommittee to confider new substances for atender ization 66. Chrnace in Format Standards 237 ennounced that by corresponsence the Committee had tery following revised ording to be used for section 1.2 of irds The Secreanproved the the na- The purpose of the standard is to sefeguer^ the neelth of all workel by Iscribing the permissible concentration of ~~~ in the atmosoner~ of work places Dr. Schrenk proffered for consider tion s slightly different wording This net with sen- nich he thouent might be still tore effective rel favor na upon motion by or Sloomfield duly seconded it wee unanimously VOTED that section 1.2 the the 237 sten~ erds be purpose statement in worded as follows The purpose of the normiscible the stend^,r^ is to rescribe concentration of w----ern -- in the atmospher of work places for uidance procedure in establishing control procedurre for the protection of = repit of workers 3 S | UTO020 -. 9/73 i4 os 7 Seanad JUB is JUB = JUB ~~ -15- -15- 037/117 April 9 1247 The Secretary remorted that by Corregr 237/101 swiption Committee red eccented Dr. Corneton's swiption for using to get o tee separete ction of Section 2 From - hoeds 1.3 2.1 - Generel Proportice ~ 3 - Toxic Fronerti 2.2 > Chemical Froperties Applications 68. for warship Min 4 It moo re= corted that request for the Air Eygiene Function ora withdrawn its previous emberehip in the Committee the Trusteer having con- cluced of the that the AHF wes cireedy closely allied with the ectivitipe Committee through the number of committes erg erg maro directly connected with the mork of the Foundation The Secretery announced that under date of September 17 the Americen Industriel Hwgione association d officially esked for membership on the Committee The Association hrd established established established organ- izetional procedurer and personnel for arriving at essocistion opinions Unon motion by Dr. it was unenimously Johnston seconded by McMctor tor Stretton VOT to recon and to the Safety Code Corre Committer that the American Industrial Hv.iene Association be accorded Committee for Allowable membership on the Concentrations of Toxic Duste and Greng - 237 with the under- stending that the Association would designete as its representative one of the Members Lerge nor serving on the Committee 69. Adjournment The meeting adjourned et 4:45 c.D. subject to the cell of the Ch CYRIL AINSTCETH Secretary 237 . 4. Burke rr, re { |/7 SUTO020 ( 1 et ani 5 ani ee ~ AMERICAN STANDARDS ASSOCIATION WEST THIRTY NINTH STREET NEW YORK IS ... SA ay 237/158 January 6 1944 AINUTES AINUTES ASA COMMITTEE ON ALLOWABLE CONCENTRATIONS OF TOXIC DUSTS AND GASES - 237 November 23. 1943 Subject to Confirmation The meeting was called to order by the Chairman at 9:45 a.m. in Room 903 of the Engineering Societies Building 29 Weat 39th Street New York Present Kant 7. P. Chan Hember Adams James M. API Bloomfield J. J. APHA Cranch A. O. Member Gardner Leroy U. Member Gray Albert B. CSPH of NA Alternate for H. A. Osborn Greenburg Leonard PAIASC Namilton Alice US Dept. of Labor Johnston John Member Mo Gord Carey P. AA of IP & 3 Neal Paul A. USPHS Paine Walter 9 NSC Schrenk H.H. US Bur of Mines Selby D. C. Snell Myron A. Member) SE Stratton Reuel C. US War Dept. Rep Lt.Col G.R.Ensminger von Oettingen Member Larje ialto T.R. Heyden Chemical Corp. New York N.Y. and Garfield N.J. Commander Burton Otto L. Navy Department Chapman George H. Alternate National Association of Mutual Casualty Companies Irskine Lillian Division of Labor Standards U.3 Dept. alternate Frary F. C. American Aluminum Co. Hough Warren A. Alternate Association of Casualty & Surety Executives Irish D. D. Dow Chemical Company Low Frank S. Jestvaco Chlorine Products Corporation Ainsworth Cyril Secretary amb Henry G. ASA Starf Hayes Daniel ASA Starf _ anal SUTO020 |) 17 7 =2- 237/158 November 23 1943 Bowditch Manfred Foulger John H. Drinker Cecil Drinker Philip Harrard Howard W. Hatch Theodore F. Absent IAGLO MCA of US Member Member Member Member Henderson Yandell Kehoe R. A. Lanza A. J. Sehl F. W. Vosburgh B.L. Watson C. H. Member Member Member) Member Member Member 84. approval of Minutes The minutes of the meeting on April 27 1943 were approveads circulated 85. The Secretary reported that the committee had to date leveloped eight American Standards and four American War Standards Since the last meeting of the sectional committee draft standards for the following substances had been approved by the ASA Metallic Arsenic and Arsenio Trioxide Xylene Lead and Certain of Ita Inorganic Compounds and Toluene The Secretary advised that the draft on Oxides of Nitrogen was before the Executive Committee of the SCCC for recommendation to the Standards Council of the ASA and that the draft on Methanol was before the sectional committee for letter ballot He also status of standards covered by minutes 86 and 87 reported on the 36. Styrene Monomer The Chairman recalled that the draft which had been prepared by Dr. D. D. Irish of the Dow Chemical was then before the sectional committee for its consideration Company Dr. Irish stated that in the animal experimentation the animals were kept in a concentration of 600 ppm for many months It was indicated however that such a concentration was too irritating and would not provide proper working conditions The concentration therefore had been set at 400 ppm Dr. Upon motion by Mr. J. J. Schrenk it was unanimously Bloomfield and seconded by VOTED that the draft be submitted to letter ballot of the sectional committee with a recommendation for favorable action the draft 87 Carbon Tetrachloride The Secretary reported standard which had been submitted to letter callot that of the sectional committee sive votes from Mr. Dr. Philip Drinker under date or October 4 1943 had received nega- Bowditch Mr. Bloomfield Mr. Foulger and The negative vote of Mr. Foulger had not concerned i SUTO020 i! { mm ' ro i iil 1 ba? wa ai . < 237/158 3 2. 2 November 23 1943 the allowable concentration but concerned the inadequate wording of Paragraph 2.3 Dr. Hamilton had cast an affirmative vote but in so doing had expressed the thought that in her opinion the allowable concentration was still too high She had voted in the affirmative in order to avoid delay in the promulgation of the standard The Secretary also had had correspondence with Mr. Bowditch in which the Secretary urged that the Bureau of Industrial Hyglene delay issuing its recommendations until the ASA committee could consider the standard further in the hope that a meeting of minds could be obtained The Secretary then reed a communication from Mr. Bowditch outlining the position of the Bureau of Industrial Hygiene 7 Massachusetts In opening the general discussion the Chairman stated that he did not want the committee to run through a standard on carbon Setrachloride believing it necessary that the committee consider all of the technical information available Dr. Greenburg also advised that he did not consider the concentration of 100 ppm as specified in the draft submitted to the committee as satisfactory on the basis of the information he had Available He had voted in the negative because of the facts obtained in the investigation of two fatalities occurring in New York State He was planning to have a thorough review of all of the facts in connection with these cases made by the chemists of his division and would be pleased to make this information available to the committee Mr. Low expressed the opinion that the evidence in Dr. Elkins report on which the decision of Massachusetts is primarily based did not justify the reduction of the concentration below 100 ppm He advised that the best reliable information indicated that exposure to a concentration concentration of 100 ppm would not cause any systemic poisoning and especially emphasized that the manufacturers would back any standard that was 50 or 75 reasonable If necessary they would agree ppm Mr. Low was of the opinion however to concentrations to that if the concen- tration appeared to industry to be an unreasonable figure the standard would defeat its own purpose Dr. Irish indicated that operations carried on under the concentration of 100 ppm had not produced any subjective symptoms end that the concentration would therefore appear to be satisfactory Dr. von Oettingen stated that 100 opm had been always safe and that literature as well as experience had proven that point He also claimed that the cases which had occurred had not shown symptoms of poisoning as no was of the opinion evidence that the of poison could question before be found Dr. von Oettingen the committee was one of interpreting the intent of the maximum permissible concentration Ig the maximum permissible concentration set at a point which will prevent SUTO020 | 5 5 _ -+4- ple, 137/158 November 23 1943 systemic poisoning or is it also intended to prevent discomfort Dr. von Oettingen believed cause toxic effects and he that concentrations up to agreed that they may also 100 ppm can cause sub- jective unpleasant symptoms The committee therefore must make the decision as to what is its intent in setting the allow- able concentration that In the general concentrations less discussion which than 100 ppm may followed result in it was agreed effects such as nausea and vomiting Dr. Greenburg suggested that it might be satisfactory to maintain the concentration at 100 ppm out that a statement be added to Paragraph 3.1 which would call attention to the fact that such concentration and even lower concentrations may cause symptoms such as nausea and vomiting in sensitive persons Such concentrations however are not necessarily indieative of systemic poisoning Mr. Pains expressed the wish that the committee revise the standard to incorporate Dr. Greenburg's suggestion In so doing the committee would be developing a standard based on experience Mr. Whiting stated that he understood that deaths bad securred due to exposure to concentrations less than 100 ppm and asked whether or not members of the committee had information to show that the Bureau of Industrial Hygiene of Massachusetts had based its decision on such alleged cases No member of the comalttee however knew of such cases After further general discussion the Chairman referred the draft standard back to the subcommittee in charge of this subject with the recommendation that it prepare a revision based on the suggestion of Dr. Greenburg and that the revised draft be then submitted for its review to the before Bureau of Industrial Hygiene of Massachusetts any further action is taken by the ASA com- mittee committee he 88 Formaldehyde Dr. A. 3. Gray Chairman of reported that was unable to prepare a draft the substandard inasmuch as Dr. Greenburg had not submitted his material to him Dr. Gray however thought that the concentration limit ought to be kept at a figure to prevent the workers from becoming irritated Dr. Leonard Greenburg advised that he had received com- plaints 5 ppm from workers when the concentrations were For this reason he had voted NO on the set higher than letter ballot It was his contention that workers will not work in a room at a concentration over 5 ppm and that is the result A limit of 10 ppm Or Greenburg a great deal of conjunctivitis was definitely objected to by resulted In Dr. Gardner's opinion a concentration over 5 ppm in high degree of susceptibility and dermatitis . 3 SUTO020 U In a ae 237/158 November 23 1943 resulted Dr. in a McCord concurred marked degree of with Dr. Gardner in that it dermatitis with severe pain Further discussion ensued regarding the concentration as regards the discomfort or poisoning experienced by the workers Dr. Schrenk however suggested that the subcommittee establish a limit based on the poisoning effect which could ce referenced to a footnote calling attention to the irritating action of exposure to concentration higher than the limit specified At this point Dr. Greenburg agreed to send Dr. a summary of all the material he had on Formaldehyde Gray 89. Trichloroethylene Mr. F. Low chairman of the subcommittee on richloroethylene reported that no draft standard was prepared inasmuch as there is very little information on this substance regarding the allowable concentration Also it could not be determined whether richlorethylene has a similar effect as carbon tetrachloride in cardiac disturbances Mr. Low indicated that he disliked very much using a concentration of 200 ppm now generally accepted and then later on discover that such a concentration is hazardous He was certain that an extensive study could He could not promise be available be completed before the however as to how soon end the of this year draft would It was Dr. Selby's belief that inasmuch as everybody accepts 200 ppm the committee centration and should it prove ought to be to accept a tentative conincorrect the committee can later state so At this point he did not know what the Dr. von Oettingen frankly stated that correct concentration should be on trichloroethylene and that the concentration . congly limit be felt that it was set correctly very important Mr. Bloomfield remarked that most of the states were operating on a 200 ppm concentration based on sound engineering practices and Dr. Gray concurred with Mr. Bloomfield adding that no serious disturbances had been experienced although concentrations had been sometimes set at even higher figures than 200 ppm On the other hand Dr. Greenburg definitely objected to a con- centration of 200 ppm due to the two fatalities which had occurred in this neighborhood He explained that his opinion a limit should not be set until a more thorough investigation is made Following further discussion it was agreed that the subcommittee prepare a draft standard and submit it for considera- tion to the ASA committee Dr. Greenburg then offered to forward SUTO020 | 17 femal vide, - 5 - 137/158 November 23 1943 Mr. Low a paper by the New York on trichloroethylene and safe cu State Department of Labor year centrations ago published 90. Acrylonitrile Dr. Faul A. Neal Chairman of the subcommittes on Acrylonitrile advised that a great deal of time had been spent on this substance and that his committee had been unsuccessful in arriving at a decision inasmuch as there was no analytical method that could be used He suggested that this project be dulayed until such time as a method of analysis could be determined He was willing however to prepare a standard upon further instructions from the committee Oy At the suggestion or Dr. Johrenk and upon motion by Greenburg seconded by Mr. Paine it was unanimously VOTED that the subcommittee be requested standard based not on air but on L prepare a ine analys18 31. 311ica Dr. Gardner Chairman of the subcommittee on silica reported that his committee oelieved it was impractical to set a standard for permissible concentration of silica that would be applicable to all industries because silica nazarda cannot be measurebdy concentrations alone Concentrations can be used however as benchmarks or guides He objected to the stating that no danger of silicosia can be incurred up to a certain limit It was suggested by Dr. Gardner that inasmuch as 5 million parts per cubic for was established at the National Silicosis Conference we can do likewise Apparently this limit was found to be satisfactory It may prove however to be satisfactory in some industries and dissatisfactory in others Dr. Gardner also advised that we could perhaps have a standard on different forms of free silica Mr. Bloomfield concurred with Dr. Gardner in that the committee should write a standard containing concentrations for certain dusts found in various industries auch concentrations to be based on sound field laboratory work It was Dr. Greenburg's belief that a sliding scale of concentrations for two three or four industrial groups would be practical in view of the data which are at the disposal of the Committee He recommended that Dr. Jardner's suggestion be fol- lowed and that such concentrations be referred to as benchmarks for operating purposes Mr. Paine also establish some threshold present them to the full agreed and urged that the subcommittee limits along the lines suggested and committee as soon as possible SUTO020 | eee jj! 3 5 ry? - 2? = 37/158 November 23 1943 Finally ulan motion by Dr. Mr. Whiting it was unanimously Johnston seconded by VOTED that the subcommittee be requested to proceed with the development of a standard which could be presented to the committee for consideration at the earliest possible date 92. Committee on New Substances Dr. McCord Chairman or the subcommittee on New Substances advised that a report had been sent to the committee requesting that subcommittee personnel be appointed for the consideration of standards on fluorine fluorides and methyl chloride hloride In discussing the necessity of a Mr. Paine asked Dr. Neal whether that such a standard be developed from the conditioning and the preservation of rood standard for methyl or not it was important point of view of air Dr. Neal informed the committee that the National Research Council had several meetings on this problem of providing a substitute for freon used in air conditioning and refrigeration He stated that many letters had been received by the U.S.P.H requesting information as to whether or not methyl chloride was juitable as a substitute for freon Insufficient information ia available to make it possible to state that a certain concentration of methyl chloride could be safe It was believed however that 500 ppm which some have suggested was too high for methyl chloride Dr. Neal further stated that it was difficult to determine the maximum permissible concentration because little research had been conducted Upon motion by Dr. Neal seconded by Mr. Paine it was VOTED that a subcommittee be appointed to for a standard on methyl chloride prepare material Dr. Frary suggested that while the subcommittee on hydrofluoric acid which had been appointed many months ago had not proceeded with its assignment nevertheless it appeared to se a logical committee to consider fluorine and flourides SUT0020 pre [03 in - 237/158 Jovember 23 1943 In accordance with the suggestion upon motion by Dr. Schrenk seconded by Mr. unanimously of the Selby Secretary it was and VOTED that the committee on hydrofluoric acid be discharged and a new committee formed to consider fluorine fluorides and hydrofluoric acid Note Jubsequent to the meeting the following committes as appointed Jr. Paul A. Neal Dr. Carl Voegtlin Dr. P. C. Frary rA. i Kehoe Mr. M. Bowditch Dr. A. G. Cranch Chairman office Fatryl The Secretary informed was continuing to receive and TNT the committee that the ASA requests for information on Colonel Stratton suggested that inasmuch as there vas a Canadian Standard on Tetryl and TNT it might be advisable to refer all future inquiries of this standard and if additional information was desired to the Safety and Security Branch Ordnance Department Chicago Illinois The desirability of metablishing a standard on radium was questioned by Dr. Greenburg He understood that 1300 workers were engaged in the radium industry in the State of New York at the present time de mentioned that the New York State Department of Labor was developing a code for radium content of expiring breath Dr. little radium deaths Gray mentioned that in Connecticut there was very painting but nevertheless there had been several The difficulty of drawing up a standard for radium was discussed by Lt. Commander Burton Because no other standards 15 15 t SUTO020 11 lig 237/158 a November 23 1343 were available the Navy Department had to write their own speci- fications He believed it was desirable that a standard should 2778 from a body such as the American Standards Association Upon motion by Dr. Neal seconded by Mr. Paine it was unanimously VOTED that a committee be appointed by the Chairman to consider standards for Radium Dust Fadon das in Expired Air and Workroom xir and Gamma ray exposure Adjournment The meeting adjourned at 2:00 p.m. SYRIL AINSWORTH Jecretary 237 Reported by 7. Cappelletti 00 Alternates Organizations Specials SUTO020 7 10 OFFI OF C FEURSEFEURS ARY 7 ORG RECEIVED I < il, A AMERICAN STANDARDS ASSOCIATION 10 East Str Stre eet e New t York 17 N. 1718 337/206 NOT FOR PUBLICATION om JINUTES W ASA COMMITTEE ON ALLOWABLE CONCENTRATIONS OF TOXIC DUSTS AND GASES 237 lovember 20. 1945 Subject to Confirmation 1.0 The meeting was called to order by the Chairman at 10.15 in Room 128 Hotel Biltmore -3rd Street and Madison Avenue New York J.Y resent ant 7.P Chairman Gloomfield J.J. Bowditch Manfred Granch A.G. Erskine L. Alternate for A. Hamilton Gardner L.U. Greenburg %. Jurney 3.w. Kehoe R.A. Lanza A.J. AcCord C.P. Neal P.A. 3chrenk H.H. Snell M.A. Stratton R.C. Toody McI NSC APHS HS IAGLO Member U.S. O. or L. Member . IAIABC & NCGIH , NAMCC) ( AIHA Member ) AA or IP & 8 FSA PHS USDI BM NCB AI or CE API Bonsib R.S. Alternate API Chapman G.H. Alternate NAMCC Goldman F.H. U.S. Public Health Service Hough .A Alternate NCB . Low ... Jestvaco Chlorine Products Corp lebster S.H. J.S. Public Health Service Ainsworth C. ASA Starf Lamb H.G. ASA Staff Hayes D.F. ASA Staff Absent Drinker Drinker Foulger Haggard C.K. P. J.H. H.7 Member Member MCA or U.S. Yember SUT0020 17 3 2 037/206 November 20 1945 Hatch F.F. McConnell W.J. Osborn S.H. Behl .. Salby C.D. von Oettingen fosburgh L. Jatson C.H. 7.F. Member V.3.War V.3.War Dept CSPH or NA Member Yember Member Member Member The Chairman introduced the following new members or the Committee Dr. Helver foody and his alternate Ar A.3 Sonsib representing representing the the American National Petroleum Institute and ir 3.7 Gurney Association of Mutual Casualty Companies 104. lpproval or Minutes The minutes of n September 30 1744 were approved as circulated the meeting innounced 105. that Resignation or John Johnston under date of October (= 1745 The Chairman Dr. Johnston had pre- sented his resignation as a member on this committee Re ad stated that it had been necessary for him to restrict his ctivities due to ill health It was recailed that Dr. Johnston and served very ably as Chairman of the Editorial Committee His work had been of great importance particularly in the editorial accuracy of the standarda approved by this committee but because of the reasons tion should be given it was considered only just accepted It was agreed that the that the resignaSecretary should rite to Dr. Johnston thanking him for the able assistance which he had given the 237 committee 106. Jar Standard~ Hr Ainsworth reported that at the last meeting of Standards Council it had been suggested that all committees which supervise work in technical fields review the war projects projects which had been adopted - determine which of those stand- ards should be retained which should be changed to regular American Standard~ which studied further should be cancelled altogether to determine what action asnould and which be taken should be This com- mittee had developed 5 American War Standards namely Allowable Concentrations for Cadmium Manganese Metallic Arsenic and Arsenic Trioxide Xylene and Styrene Monomer hat action it would take with regard and it enould now determine to these 5 standards Or Xant stated that he believed the war Standards should be recon- sidered that there unquestionably exposure to each of the substances approved that the substances used was industrial hazard from for which War Standards had been during the war would continue in use during the peacetime with the same nazards applicable Dr. Kehoe stated that the substances prepared under the far Standard procedure had been handled in this manner because it had been felt that the information available on these substances was not very complete but in a measure tentative out that industry vanted guidance and it was desirable to give it the best knowledge on the subject even if it was not the final word Since the situa- tion had not changed with the cessation of war and industry would continue to use substances for which they needed guidance t Jas SUTO020 97 171 L -3- 237/206 November 20 1945 desirable to continue standards for them even if these standards were called tentative just as long as industry was aware that the standards were not the final word put based on the best knowledge at the moment Mr Bowditch said he was in complete agreement with Dr. Kehoe and that he had also spoken to Dr Drinker on the tele- phone and he too felt that the War Standards should be continued is regular American Standards subject to #natever corrections the committee felt necessary and it was suggested that each Far Standard be referred back to the subcommittee which had developed 15 Upon motion by nanimously Mr. Stratton duly seconded it was TOTED that the 5 American War Standards prepared by the 237 committee be referred back to the subcommittee which had developed them for review and recommendition to the entire 237 committee concerning approval as American Standards The Chairman announced that it was entirely within the province of each cera to serve on subcommittee chairman to invite additional his subcommittee if he so desired men- linsworth 107. Reconsideration of Scope Mins 1 100 recalled that at the last meeting the question ir had been raised as to whether were included within toxic limits the scope or for the the Z37 prevention Committee or dermatitis The scope of this committee was as follows To determine and promulgate the allowable concentration limits of harmful gases vapors fumes dusts and mists and other subjects related to the allowable concentra- tion limits of such substances in the atmosphere of work- ing places from the viewpoint of accupational disease prevention During the past two or three years it had been realized that this scope only touched on one phase of the question of toxic substances There had been several occasions when the subject or dermatitis previously demand for had been raised furthermore there had been a great instructions on the safe handling of toxic substances rather than just a statement or the maximum allowable concentration The question were covered had been raised as to just what parts or this under the present scope and as to whether the problem com- aittee anould recommend any changes in the scope in order that other parts of this problem might be or whether this committee would have covered by the any particular Z37 Committee viewpoint if the ASA should be requested to form additional sectional committees to handle other phases of the problem of toxic substances scope The Chairman recalled that doncernin thge part of the and other subjects related to the allowable concentration SUTO020 ' sat 1 .~ ij { oe tl, +e 7a 237/206 November 20 1945 limits of such substances in the atmosphere of working places the question had been raised before as to nether onysiological and biological standards as a measure of air contamination could be included in 237 standards He mentioned that at the last meeting Dr. McCord had discussed the control of dermatitis and the possibility of drawing up a set of rules or criteria for the determination of the existence of industrial dermatitis Dr. Kehoe thought that the use of biological or physiological standards as a practical expression or the facts of atmospheric condition on the personnel of the plant was very val- uable He considered that a standard based on that type of a test was included within the present scope There had been no mention in the scope as to whether the atmospheric contaminants were absorbed through the lunge or injected as a result of swallowing but he believed that all of the standards which had been developed by this Committee gave proper consideration to both of these effects He believed that perhaps the most impor- cant point was in connection with the possible absorption or coxic substances through the skin where the control of the suostances is not necessarily based on the control or air contamina- tion He seriously questioned that this committee should ven- ture into the field of dermatitis Dr. Cranch commented that the object of this committee had been to fill a gap in the source of safety information Ha agreed that the scope should be interpreted tests of the atmosphere or physiological or to include biological either tests to aeasure atmospheric contamination but he did not believe that the scope included either dermatitis or the general type of akin absorption of chemicals The Chairman pointed out that Mr. Ainsworth had no desire to enlarge the scope of this committee but had merely raised the question because of the problems which are frequently bbrought to the ASA He recalled that the ASA had been requested to develop a code on the industrial use of rays and Mr. Ainsworth had conferred with him to be sure that there was agree- ment that a separate committee should be appointed to handle this subject rather than refer it to the 237 Committee After further discussion by Mesars Stratton upon motion by Dr. Cranch seconded vas unanimously Bowditch Neal and by Dr. Sehoe it TOTED that the committee continue under the present acope with the interpretation that this scope included permission to use physiological or ciological tests when these were found to be ractical for the determination or atmospher- ic conditions The 108 General Policy on Developing Standards and Reports Chairman remarked that this committee had on a number of SUTO020 I 151 151 2.v 7 } ~5- 37/206 November 20 1945 occasione initiated work on a particular substance Later on the recommendation of subcommittees work nad been discontinued because of limited data available The question of the amount of cata or avidence necessary for arriving at a standard had come up fre- quently in the discussion on many individual standards which had been considered by this committee The question was primarily one of whether or not this committee should wait until complete data was available before establishing a standard or whether with incomplete order that evidence a a standard crocer safety factor should be could be approved and put into applied in use at the carliest convenient time Mr. Low thing better than that insufficient thought that standards should certainly be some- just a wild guess Then a subcommittee reported data was available on which to base a standard there should be facilities for referring such problems to a research organization to develop additional facts In further sevelopment of this idea it appeared that probably many researcn institutions could be brought into this work Mr. Ainsworth remarked that he was concerned about this problem from a slightly different angle Although the American tandards Association was in no way trying to build up work for itself or to develop a vast array of standarda ne recalled that at the start of the work or this association there had been a large body of state regulations concerning working conditions and any of the problems arising out of accident prevention work These sally regulations varied widely from state to state and practi- no two of them were alike Because of this confusion the American Standards Association had been requested to develop many safety standards Through reference to meeting he called attention to the fact were now establishing maximum allowable list of substances Thereas there were the discussion at this that many of the states concentrations for a long 16 approved maximum allow- able concentrations which had been developed by this committee several states had lists of over 100 chemical substances Some of these state regulations had been based upon sound research and other concentrations approved by the states had of necessity been based upon sneer estimates without any carticular research or facts upon which to base been faced with the problem their where figure a state He had in the would write to past the ASA and inquire if a standard were available on a certain substance He had written back to the state advising that a subcommittee 7a8 working on that substance and hoped to have a standard available Although he had not been able to predict how soon this work would be completed he had urged the state to delav promulgation of their order until the work of the subcommittee had been completed Then the subcommittee had reported that there was insufficient data on which to bese a standard and Mr Ainsworth had been forced to write co the state to advise them that work on this substance had been discontinued and it would therefore de necessary for them to go ahead and promulgate their own order on this substance without any assistance from this committee ie had Cooked upon American Standaris simply as a tool for use at the moment It was the general understanding that these standards SUTO020 | i5 it * Er 037/206 - November 20 1945 could be changed at any time in the light of new ever it became advisable le realized that many information state health nen- departments he realized looked to the 37 Committee that standards should be based being authoritative upon facts whenever and available He suggested that the committee might wish to consider the possibility or developing tentative reports on subjects where they did not feel there was sufficient information available on which to base American Standards e Was quite sure that auch reports could be beat thinking of state regulatory published in order to provide guidance as to the the moment which would be of real help to the bodies rather than to discontinue the work on a substance because of lack of information Dr. Kehoe believed that this suggestion contained a great deal or merit de suggested that where a new material been produced and studies nad been made on it througn animal xperimentation he did not think that any reasonable person had would desitate to accept the resuits or animal experimentation as giving 1 reasonable basis for some kind of conclusion with reference to the effects of this aubatance on human beings There specific information was not available he thought that a report could be lagued which would serve as a kuige giving an upper limit beyond which it would be conaldered that the substance would probably be carmful rould be and a quite lower limit where best information at certain that no narmful effects would the moment result or Mr. Mr. Stratton agreed wholeheartedly with the suggestions Ainsworth and Dr. Kehoe de reported that the various Allowable limits for certain substances which were being promul- gated by the various states presented a problem to insurance companies He suggested that where sufficient information was not available it might be helpful to develop tentative standards as a service to industry After further discussion by Messrs Jeal and Schrenk upon motion by Mr. Schrenk Bowditch it was Bloomfield Bowditch Jeconded by ir VOTED that on any substance which was considered by this committee the first aim should be to establish a regular American Standard the data available was not if it were sufficient found that to warrant such a standard that consideration be given to establishing mittes found a tentative standard if the comthat the data available was not suitable to put into a tentative standard Committee should at least prepare a report The which could be published by the American Standards Association in order to present the information available at the time concerning the given substance recalled 109 Revisions that some two or of Approved Standards Ar Ainsworth three years ago the committee nad SUTO020 ' In tho ak ( fe -~ 237/206 November 20. 1945 discussed the relationship of work of the 237 Committee with that of the Subcommittee on Chemical Method in Air Analysis of the American Public Health Association and they had agreed that the work of the two committees should be coordinated Nevertheless in standards prepared by this committee since that time standard sethods of analysis as prepared by the AFHA had not always been included Another point become aware of the fact to be considered was that the ASA had that there were certain American Stand- ards which dated back to 1924 with no indication that they had jeen reviewed since then so that people using the standards were in doubt as to whether these standards were the latest information on the subject As a result the ASA had adopted a policy recently of reviewing standards at least once every three years and if in the opinion of the committee in still effective and up to date charge of such the ASA merely standards they were stamped the date or such reaffirmation on the cover or the standard to indicate that it had been given reconsideration ards were now more than three years Bince some of the 237 standold it might be desirable to consider analysis including for those the American Public Health standard methods or substances for which methods were available Dr. Goldman stated that he believed that the 237 stand- ards should contain more detailed information about analytical methods and sampling procedures more specific information as to type or collecting Chairman explained mittee in the past devices and description of instrumenta The that this has been brought before the com- and it had been agreed that to go into such detail would become very involved and that for all practical pur- poses if detailed the person who did the sampling was a information would be unnecessary He qualified expert recalled that the standaris specified that samples and tests shall ified experta In addition the basic purpose of be made by qual- the standards had been to establish allowable limits The committee agreed that when a subcommittee included methods of test in a standard such inclusion indicated approval or the methods The committee further discussed whether the methods of analysis prepared by the APHA should be incorporated in the standards in some special way or whether they should simply be added to the list of standard methods of analysis -* was the general consensus that the latter arrangement should apply Jpon sotion by Mr. Bloomfield duly seconded it was TOTED that on all standards subject to revision and all standards already approved by the ASA for which standard methods or test have been devel- oped by the American Public Health Association these methods of test be referred to the proper jubcommittees for inclusion in the revised standards SUTO020 Ll 7 hafewes Li -- Y wk 3 L saab aaensindsinidnc --- 208 Jovember 20 1945 110. letter had been reconsideration Arsenic Min 77 The Chairman recalled that a received from Phillip Drinker asking for a and change in the arsenic standard This let ter had been circulated to the members of the Committee as 237/193 voted to Since this was a far Standard and since it had been refer all Nar Standards cack to the subcommittees for reconsideration take care or Dr. it was felt that this procedure would automatically Drinker's request that the present concentration be reconsidered in that the subcommittee would study all additional data on the subject 111 Carbon Tetrachloride Hin 102 The Chairman recalled that carbon tetrachloride had receiver a great deal of consideration from this committee The subcom ttee had pre- cared a total of 6 drafts at the last meeting it had been voted that the draft be referred back to the subcommittee for further consideration Mr. Ainsworth reported that mended that the full committee 6th drart be This ballot sent out had been The ballot had been closed on June 7 results the subcommittee had recomto letter callot of the circulated on April 5 1945 1945 with the following Affirmative votes - 21 Negative votes Not voting - 3 = 1 Because of the negative votes it appeared that a concensus had not been established in favor of this draft and the standard had therefore been held in abeyance for further action of the Z37 Committee In its last report the subcommittee had asked that it be discharged with the submission of that report Since the close of the letter ballot word had been received that Dr. McCord and some of his associates had been making a special study of this subject At Mr. Ainsworth's suggestion Dr. McCord nad a synopsis of the report of their investigation anion circulated to all members of the committee as 200 prepared had been ** 88 recalled that the differences of opinion within the committee vere centered around the question of whether the concentration ahould remain at 100 parts per million which seemed to be the limit nere serious systemic effects took place or whether the limit anould be placed at a lower concentration because of reported effects upon the workers of concentrations below 100 parts per million which caused absence from work and interruption to general production Consideration nad been given setting a dual standard but this idea rad to the possibility or been rejected by the committee The Chairman asked Dr. WcCord for a report on the Findings of his investigation Dr. McCord reported that with his associates Dr. Sterner SUTO020 | 17 51 i | Eee a -- 137/206 November 20 1945 Dr. Kline and Pearl E. Williams research nad been carried on for about 15 months with reference to carbon tetrachloride 18 group nad received a great deal of help from the National Research Council that nrad been working on fractions of albumen globulin They Maclagan since had been used had also received a great deal of help from Dr. ne had been the originator of the tests which They also had received help from the Stevens Hospital in Detroit His work had been divided roughly into three parts first work on specimens from 794 human beings This work had been largely for the purpose of studying the value of the tests which were being used Secondly they had done con- siderable work with fractions of gamma globulin and other sub- stances which had been provided from the Harvard group of the National Research Council and thirdly they had done a rair amount of work with animals This latter work had been with reference to concentrations or carbon tetrachloride Dr. McCord recalled that Dr. Maclagan in an obscura lospital in England had reported on a method turbididy test or as thymol barbitone test McCord's group using this test had snown a known as thymol The work or Dr. fair validity in picking out certain liver diseases which might possibly be quite apart from carbon tetrachloride poisoning His group had found that this test provided a good indication of damage in animals as a result of toxicity from carbon tetrachloride Work had been done both with rabbits and rats Their animal experimentation with rabbits had shown systemic effects from exposures to 80 parts per million of carbon tetrachloride within one week and from exposures down to 40 ppm lasting two weeks The recent experimentation tended to indicate that the tests used were not necessarily positive tests for gamma globulin It had been their thought that these tests were measuring changes in phospholipins anich are a product of disturbed metabolism He suggested trat the work which they had done would definitely indicate that con- centrations of carbon tetrachloride to the extent of 40 60 or 30 ppm in small animals especially rabbits induced increased quantities of phospholipins in the bloodstream He believed that this research indicated a method of test which might be used to ietermine early changes in numan beings due to carbon tetrachloride nich might otherwise be unobserved He announced that the results of this research would be published in the near future Mr. Low stated that the manufacturers or carbon tetrachloride had been quite active in attempting to find some organization which would undertake research on the toxicology of this substance He recalled that the amount of carbon tetrachloride used industrially was very large The manufacturers had been making over 200,000 tons a the future use of this product must year and they realized that be so controlled that it will not cause injury SUTO020 i te 010- 237/206 November 20 1945 The Chairman remarked that he had been one of those no nad cast a negative vote on the last letter ballot of this subject He nad come to the conclusion that it would be very difficult to get agreement on this subject until additional research had been done to clear up the question of whether there was actually damage to human beings from concentrations of less than 100 ppm Mr. Bowditen brought out that many state regulatory codies are now adopting concentrations for carbon tetrachloride and that a great many of these are being placed between 50 and 75 ppm Dr. Zehoe recalled that earlier in the meeting it had been agreed that when dealing with new problems if the information was not available to establien a standard that a tentative standard be considered He believed that carbon tetrachloride had been discussed so thorougnly and there was such a definite difference of opinion that he did not believe the 237 Committee --ould establish any standard on this subject until enough evidence had been presented presumably as the result of further research so that a concensus could be established in this com- aittee in favor of the standard so that any minded person lesiring to use the standard would realize that it had been cased n sound facts and not an arbitrary figure which might be arrived it through compromise Mr. Ainsworth recalled that the extensive work which the 237 Committee had done on carbon tetrachloride had become general knowledge and that nearly everybody concerned with this substance was waiting to see what action the Z37 Committee would take He therefore did not believe that it would be wise to just table this substance and discharge the subcommittee If no inforsation were made available to the public other than the fact that work had been discontinued on this substance it might be of real detriment to the prestige of this committee He therefore --uggested that a clear statement or report of the present situation with regard to carbon tetrachloride should be prepared This report could be publi ned separately or could be included in the magazine INDUSTRIAL STANDARDIZATION wnion is puolisned by the ASA with additional copies available so that any group which is interested in this subject would be able to know the facts behind the work of the committee on this substance ur Stratton suggested that this subject was so important generally that even though it were tabled temporarily by this committee that the subcommittee on carbon tetrachloride should be continued He recalled the request of the present subcommittee to be dis- charged He was not particularly concerned wnetner the present subcommittee was continued or a new one appointed but he believed that by the continuance of a subcommittee it would be able to Follow up developments which might come as a result of further research SUTO020 t4 i oe at -11 237/206 November 20 1945 Mr. Snell stated that agreed with fr Stratton te remarked that various states are now adting adting permissible limita for carbon tetrachloride and he believ that this subject waB very important He suggested that if considerable time elpased before the research was completed certainly the various insurance companies and state authorities would have further reports on carbon tetrachloride poisoning and it might be that through study of these reports additional information might be made avail- able which would help in determining the permissible concentration Mr. Low remarked that it nad been the feeling of the subcommittee that on the basis of existing evidence 100 ppm was a safe standard for systemic injury from caroon tetrachloride and until further evidence became available they could not con- scientiously recommend a lower standard None of the members of the subcommittee had wished to stand in the way of progress on this standard and they had therefore tendered their resignation with the thought that the 237 Committee might wish to appoint another subcommittee to continue work on this substance As far as he personally was concerned he would be remain on the subcommittee if that was the perfectly desire of willing to this commi tee and he believed that that would be the feeling of the other zembers of this subcommittee Upon motion by Dr. Iehoe seconded by Mr. Schrenk it VOTED that work on carbon tetrachloride should be Temporarily held in abeyance pending further information and that the Chairman should be instructed to deny the request of the sub- committee that it be discharged in order that new information as it becomes available can be considered by the subcommittes July After further seconded it was discussion upon motion by Mr. Bowditch TOTED that the ASA staff be requested to prepare a statement concerning carbon tetrachloride mich might be publi ned or given out to those concerned on this subject The Chairman in the name of McCord for the work which ne nad done and the report which he had presented the committee thanked Dr. on carbon tetrachloride at this meeting 4 Li SUTO020 Say ete en iy = ry -12Z= 237/206 November 20 1945 112. Trichloroethylene Min 95 The Secretary reported that the second draft on Trichloroethylene including the changes which had been approved at the meeting of September 30 1944 had been circulated to the various state health departments Their comments were compiled and circulated to the full 237 committee 237/190 All the comments were discussed in detail After discussion it was agreed that in section 2.1 the suggestion of the New York Department of Labor be incorporated by omitting flammable in the first sentence and adding an additional sentence between the first and second sentence as follows It is practically flammable at ordinary temperatures but at higher temperatures under favorable conditions it may form weakly combustible mixtures with air." In connection with 2.2 there was some discussion regarding solubility as to whether this should be relatively Ansoluble slightly soluble or relatively soluble Upon motion by Dr. Neal seconded by Dr. Ishoe it sas unanimously TOTED that the portion paragraph 2.2 be draft on solubility in deleted from the The committes agreed that inadequate ventilation be changed sonditions the last two words of 2.2 to read improper operating There was some discussion about the wording Repeated exposure in 2.3 and its meaning in this particular instance Finally it was agreed that this should be changed to prolonged or frequently repeated It was agreed that the third sentence of this paragraph would be clearer if it read Concentra- tions higher than 200 ppm . Ur Ainswortn recalled that the standard on trichloro- athylene had been prepared as tee had voted to have all war a war standard Since standards reconsidered the for commit- approval as regular American Standards he questioned if Prichloroethylene --hould still be treated as a war standard Upon motion by Mr. it was unanimously Stratton seconded by Mr. Bloomfield TOTED that the standard on Trichloroethylene be submitted as an American Standard rather than as 1 War Standard SUTO020 1 7 this | tad hd Te a: -13- 206 November 20 1945 motion After further discussion the comments received by Mr. Bloomfield seconced by Mr. Stratton it was upon VOTED that the draft of trichloroethylene as amended at this meeting be sent to letter callot of the full 237 committee with recommendation for approval as American Standard 113 Fluorine and Fluorides Min 96 The Chairman recalled that the subject of Fluorin^ and Fluorides nad been discussed at previous meetings but no definite action had been taker orimarily because of lack of information He asked Dr. Jeal as chairman of the subcommittee on this substance if he had further information at this time Dr. Neal stated that since the last meeting a small amount of additional information had been made available but apparently there still were not enough facts to resolve the differences of opinion which existed among the member of his subcommittee He reported that some people had set an arbitrary limit of 6 ppm whereas other groups of equally good authority had set a limit of 3 ppm Both of these were apparently quite arbitrary and there did not appear to be any facts in the literature to resolve this difference Dr. Kehoe believed that although it might be possible to establish a standard on hydrogen fluoride at the present time that as far as the fluoride dusts were concerned it might take several years before sufficient evidence would be available to nake a reasonable conclusion Dr. Neal said that the situation was further complicated by the fact that some public health authorities were now starting to use fluorides at the rate of 1 ppm in drinking water as a health measure to prevent tooth decay He also recalled that certain fluorides were now being used in insecticides and the public health authorities had established arbitrary standards for fruits and vegetables in order the concentration of fluorides on to protect the public from too high a concentration The Chairman called attention to the fact that the authorities that had been responsible for fluorides in water and on fruits and vegetables had taken an arbitrary stand but had come out with a definite answer which in some cases was now committee couia not being enforced as law He wondered if this possibly take a similar stand because of the interest in would industrial exposures and come out with some figures that help in the occupational control of this substance until further information became available Or Cranch brought out the fact that as far as the SUTO020 le - hah i . [ | 14- 037/206 November 20 19461946 fruits and vegetables were concerned fluorine was usually present in one of two compounds whereas in industy the compounds of fluorine varied all the way from geses on the one nand to highly insoluble fluorides on the other hand and he doubted if a single standard could be set to cover all of these conditions Dr. Kehoe thought that on the question of fluoride just it would be necessary to base a standard on physiological considerations rather than on a definite concentration of dust in the air This led to two difficulties time there were two sources of information first at that were the present in disagree- ment one of these held that when fluorides in the urine were in the order or magnitude of 2 milligrams per liter there was evidence of retention of fluorides in the body the other source of information considered that the concentration would be 4 illigrams per liter rather than 2 before fluorides were retained sy the body The second problem was concerned with the signifi- sance of fluoride retention in tissues of the body He did not think that anybody knew definitely the relation between retention or fluorides in the body and injury or disease He therefore considered that from this point of view the committee would have to take an arbitrary stand on this issue He questioned if the committee could produce reasonable evidence at the time to show what fluoride retention in the body would lead to industrial ill health He therefore thought that there was a far better basis for a standard on hydrogen fluoride than on the fluoride iusts The Chairman suggested that Dr. Neal's committee continue to work on this problem in the hope that they might bring in a recommendation for both fluorine and fluorides but if this was found to be impractical to bring in a recommended standard for hydrogen fluoride if possible 114. Silica Dr. Wardner chairman of the subcommittee reported that he had been una..e to get his entire subcommittee together in the last several months but had had informal discussions with members of the committee They felt that they were not in ^ position to write a standard for Silica as the old arguments still applied Silica was a acting substance producing enronic disease and did not have the same effect on all individuals exposed Its reactions varied not physiological makeup but also with associated infections of the lung only according to the the presence or absence of Its effect was modified by other substances that might .2 locally present Therefore the subcommittee was of the opinion that it was impossible to write 1 standard which would be universally applicable in all industries and asked that they be relieved of the responsibility of trying to write such a standard Mr. Stratton stated that in view of recent action of one of the states requiring medical examination of workers exposed to Silica and the fact that some states had published standards for this substance there should be a standard available on the subject from the ASA Dr Lanza stated that if the ASA wished to accept a stancard in the absence of the background which most people considered important to determine SUTG020 2 Lf 3 2 -15- -15- 237/206 November 20 1945 a standard that might be a practical solution to the difficulty in this instance Dr. Yant stated that it might be more desirable to consider good practice levels to be maintained rather than thinking in terms of injury or injury that many people use standard allowable concentrations with the thought that if you were one or two percent above the maximum you were going to hurt somebody and if you were five percent under it there was no hazard at all that if there was an accepted procedure and it did the job of control of dust in industry in accordance with modern practice that would probably solve the problem Dr. Gardner as asked to continue with committee and based on the discussions at the meeting try prepare a report on what was considered good practice his to 115. Methyl Chloride Min 98 Or Schrenk Chairman of the subcommittee Methyl Chloride reported that they did not have information information at hand to decide on a definite level however there was work presently being carried on by Dr. Neal which he believed would give the information they needed They hoped that before too long they would have the answer on methyl chloride The answer would depend on adequate information which was in the making and not theoretical 116. Radium and Radon Gas Min 101 Dr. Greenburg Chairman of the subcommittee on Radium and Radon Gas reported that his subcommittee had held two meetings on December 28 1944 and January 20 1945 respectively Among other things this subcommittee had discussed a proposed code on radium exposure which had been prepared This tentative code had allowable concentration by the New York Department of Labor been prepared on the basis of a maximum of 10-12 curies per liter of radon gas in the exhaled breath of workers employed in radium dial painting The members of his subcommittee had been as follows L.F. Curtiss R.D. Evans G. Failla F.E. Hoecker P.A. Lee At the meetings of the subcommittee Hoecker had recommended that the standard Neal J.L. Cook C.2 Dr. Failla and Dr. should be based on the amount of radium stored in the body rather than based directly upon the concentration of radon gas in the expired breath Their recommendation had been on the basis that the damage to the body was caused by the between radium in the body stored up and radon radium in the and that the relation exnaled breath was influenced by certain metabolic chracteristics of the person such as their weight rate of respiration and depth of respiration They had set up a somewhat formula Total Radium in Body in micrograms : = x 109 c c There c = the average net concentration of radon in the expired air expressed in curies per liter + 7 = the average volume of air exhaled per minute expressed in liters SUTO020 i -16- 337/206 November 20 1945 2 = the fraction of the total amount of radium to which the radon in the expired air may be attributed is the relative amo of u can llt ed freely emanating radium that After further discussion at the subcommittee meeting it had developed that this formula was based on several assumptions which might possibly be open to contention The whole problem was further complicated by the fact that a new employee might develop a high concentration or radon gas in the expired breath but upon separation from the exposure for two or three weeks the radon content would decrease rapidly whereas if an employee had been engaged at this operation for several years he might because of the quantity of fixed radium in the body show very little reduction in the radon content in the expired air upon removal from the exposure it the last meeting of this subcommittee there had been a division or opinion as to whether the standard should be based upon Dr. Failla's formula or upon the radon content of expired breath The problem had been put up to Dr. Greenburg for decision but he had refused to take a stand for either side because he believed that he did not have enough factual information apon which to decide the issue He further reported that after the second meeting Dr. Curtiss had resigned from the subcommittee Dr. Greenburg gave this complete report in the hope that he could receive suggestions or instructions from this committee which would help to resolve the differences within the subcommittee He had considered adding more men to his subcommittee in the hope of developing additional facts on the subject Dr. Neal suggested that some time after next March there might be additional information on active substances available and that some of the men responsible for this research might then be in a position to serve on this subcommittee ' ' soon as their work had been published they would be in a position to supply information which might help to clear up the differences He also thought that it was important that Dr. Curtiss continue to work with this subcommittee because of the valuable work which had been done on this subject by the National Bureau of Standards After further discussion by the Chairman and Messrs Iehoe Ainsworth and Lanza upon motion by Mr. Sloomi july seconded it was TOTED that it was the recommendation of this Committee that the subcommittee on enlarged radium and radon gas should be enlarged at the discretion of its chairman and the work should be continued on these two substances SUTO0=20351 JL -17- -17- 237/206 November 20 1945 117. New Substances Hin 100 The Chairman recalled that Dr. McCord as Chairman of Substances had given a complete the Subcommittee on New report at the last meeting Que to travel restrictions and the presssure of war work no sub- committees had been appointed Cr McCord's committee had juggested that work be started on the following new substances Sulfur Dioxide Welding Fumes Nitroparaffins Chlorine Chlorinated Napthalenes Cyclohexane Cyclohexanol Cyclohexanone Hr Low It that was brought cut as this list had been a result of established a question from arter consulting all of the members of this committee It had also been agreed that the personnel of the subcommittee on new substances reviewed in order that some of the members might be should be relieved or this duty and new rempers added After further discussion by Messrs Eloomi'ield Bowditch and Neal upon motion by Mr. Bloomfield seconded by ir Jurney it was TOTED that subcommittees be appointed by the Chairman to develop standards on the various substances listed above Upon motion 3loomfield it was by Mr. Stratton seconded by Mr. FOTED that the Chairman should appoint new members to serve on the subcommittee on new substances and the subcommittee should be established on ^ permanent basis in order that it might receive suggestions and rake investigations reports as to the need for and advisability preparing standards on new substares substares and of 118. Election of Officers The Chairman reported that in a discussion with Mr. Ainsworth concerning a contemplated change in the Secretaryship he rad suggested that the work of this committee might go along faster if there were a change of officers de recalled that he nac held office for several years and as a result of the discussion ne nad asked that the subject be brought up at this meeting had Hr requested Ainsworth explained that some the ASA to appoint one of its years staff ago this to serve committee as jae 371 4 SUTO020 371 ' -18- 237/206 November 20 1945 Secretary of the committee Mr. Ainsworth had been appointed and had served as Secretary for some time The ASA had now reached the decision that it was necessary for him to give up his position as Secretary of the committee because of other added duties and responsibliities In discussing the appointment of a new Secretary of the committee the Chairman had suggested that there should also be an election to the offices of Chairman and chairman Mr. Ainsworth recalled that the ASA had considered it good policy to hold periodic elections of officers of sectional committees to prevent the work of committees slowing down through inactivity with of the officers The ADA had been entirely satisfied with the progress which had been made by the Z37 Committee In connection with the decretaryship Mr. Ainsworth announced that Mr. Lamb had been appointed to succeed him as secretary of this committee Mr. Ainsworth would still keep close contact with the work of this committee and advise Mr. Lamb on all important matters He also recalled that Mr. Hayes of the ASA staff was also available for any service that might be needed in addition to Mr. Lamo He therefore felt that he could relinquish the position of Secretary and leave this work in good hands Upon motion by Mr. Bowditch duly seconded it was unanimously FOTED that the vote for Chairman Secretary be instructed to cast the reelection of the present of the Committee one The Chairman recalled that Dr. Selby was Chairman of the committee Dr. Selby had been unable to attend this meeting but had previous to the Selby was still been talking with the Chairman by telephone meeting So far as could be determined Dr. willing to serve as Chairman of the committee Stratton Upon motion by Mr. Bloomfield it was unanimously seconded by Mr. VOTED that Dr. Selby be reelected as chairman or this Committee Adjournment Reported by 7. Kwartler P.H. Gruver 0-9-46 The meeting adjourned at 4:40 p.m. Fenry G. Lamb Secretary SUTO020 17 111 34 a3 . a? . at alll- : 3 . f * AMERICAN STANDARDS ASSOCIATION 70 East Forty Street New York 17 N. Y rd a 29/27 November 14 1947 To the Members of the ASA Sectional Committee for the Safety Code for Exhaust Systems 29 Gentlemen This memo has been prepared to inform the members of the 29 committee of certain facts regarding the status of the work at the present time una to set forth matters anion might be consicered at the meeting of the 2 committee on December 5 1947 The entire committee has been reorganized according to the American Standards Association requirements for a salety coue sectional committee Mr. Cyril Ainsworth of the ASA starf his acted us Secretary of the committee f^...r Many years The Chairmanship is at present vacant The scope of the Zy project is as follows Standaras for the design operation and maintenance of equipment to provice a sa^fle atmosphere by removing harmful substances from their point of production or issuance and by safely disposing of such supstances and such supplementary statuards on personal protection as may be Lecessary to prescribe metuocs for the protection of workers The sectional committee has developed the Fundament- als Relating to the Design LLC operation of Exnaust Systems published in 1776. The Introduction to the fundamentals Relating to the Design um Operation UI Exhaust Systems says Industrial processes cliter marnedif ...... their caracteristics in respect to the application of exnaust ventilation and it is not possible to prepare une set of specifications and regula tions which will suffice for the successiul design unu opera- tion of every exhaust incepencent problem system Each process constitutes an There are however certain runcamentul requirements common to all excaust systems wale, saouil seive seive s the basis p^ Lesigh in every case . view of the fict that these Fundamentals were developed in irso the time elapsec may have given the imustry in opportunity to develo informa- tions data opinion us to its correctness applicability and useiv^ nesswhich might lead to mouifications in the llgat of expedary i exe pen ric ene ce Dr. Ineocore F. Huten Q nal committee considering changes lk 1921 Wich were qu ellectuatec -'* The 27 committee has also developed Safety in Electro- plasing Operations 27.1 Inis stunluru nas 080 Wile Listriou- tion It 15 dkupieu in 1741 und may be consiuleu for Itali Itali~-rma- I~tal-i r~-mrmaa- - tion or revision by the committee SUTO020 Lone ween ay i JL 2 aati tenladie att ar lan oF aA Ta rentalspolie at ple we ool, eee act ad a - age Ree. = ; -~ g 29/27 November 14 1947 a * The 29 committee also considered Grinding Polishing and Buffing Equipment Sanitation standard developed by the Incustrial Hygiene Coues Committee of the American Foundrymen's Association submitted to the ASA and approved as American Standard in 1941 The committee has before it in the form of a Code of Recommended Good Practices a standart for Metal Cleaning Sanitation also Geveloped by the AFA Industrial Hygiene Codes Committee and approved by its Board of Directors for use in the lounary industry There have been proposed a series QI modifications in the Metal Cleaning Sanitation Code as sub- mitted by the AFA which have been worked out in correspondence between the American Founcrymen's Association and the members of the Subcommittee on Abrasive Cleaning of the Zy committee If some impetus were given to this code it would be possible for the 27 committee to consider it for adoption as an American Standard It contains specificatisons pecifications relating to alkaline cleaning solvent cleaning solvent degreasing metal pickling tumbling mill cleaning all abrasive blusting with exnaust specli- ications relating to each of these neudings The committee had organized several subcommittees to sancie other phases within the scope of the Zy project These subcommittees may have to be reorganized in the light of chantes in the personnel of the committee It will probably be well for the Zy committee nowever to review the scope and Gesirability of continuing the word of these subcommittees The subcommittees are Plan LA Scope Aprusive Cleaning Rock Drilling Granite Cutting a craft for glamite cutting cated October 4 1740 was circulated to the committee and others but no final action was completed and Electroplating whicn latter cumpleted its ura in the Gevelopment of the present Safety I Electroplating Operations 11-1941 It might be suggested that touse who are on the committee at the present ize anu who were active in the work of these subcommittees 1 prepared to present to the sectional committee the present status of any work which may have been l^'veloyel within the subcommittees of which they were members , In view of the statement quoted above from the Intro- Suction to the FundaLentais it might also De Suggested that representatives of the organ44utions on the the work of their own associations in order Zy to committee review learn whether or not there have been any sets of specifications and regulations developed by their organizations which could form coces for the incepencent problems mentioned in the Introduction to the Fundamentais It is quite possible that recent developments or techniques developed point where they may be sectional committee vir Gustries may nave reached the thua Iur Stahlartization by the SUT0020 151 TO hr qemes RE Te en aE Pa eee v eo . , . 3 29/27 November 14 1947 ~ amr This outline may constitute a tentative agenda for the amittee's consideration on amber 5. However as an active representative of your org Zution we sollcit your suggestions and ask you to send them as soon as possible for inclusion in a final agenda for the meeting Juril Juril Cyril Ainsworth Secretary Secretary 29 SUTO020 on Mm roi SS ie | | J ltt} (3) e[, Ee a. 3 ASA AMERICAN STANDARDS ASSOCIATION 70 East Forty Street New York 17 N. Y ~ 29/29 PRIVATE COMMITTEE DOCUMENT NOT FOR PUBLICATION oe MINUTES ASA SECTIONAL COMMITTEE ON SAFETY CODE FOR EXHAUST SYSTEMS 29 December 3 1947 Subject to Confirmation Lamb of in Room City The meeting was called to order by Mr. Henry G. the ASA staff who acted as chairman it 9:40 a.m. 2946 ASA offices 70 East 45th Street New York Present Brandt Allen D Brush Harold F. rep Alex Martin Cranch A.G. Dorfan M.I. alt for W.0 Vedder Hatch Theodore P. Hoffman B.E. Meigs Ralph R. Renes rep Stern Lucian E. H.E. Seifert Arthur C. Stratton Reuel C. Vedder W.O. Wallace William M. II Harris W.B. _ American Public Health Assn National Assn or Fan Manufacturer International Acetylene Assn Foundry Equipment Mfrs Assn American Industrial Hygiene Assn National Paint Varnish & Lacquer Association National Association of Mutual Casualty Cos U.S Public Health Service American Society or Mechanical Engineers National Conservation Bureau Foundry Equipment Mfrs Assn American Society of Heating and Ventilating Engineers American Conference of Govern- mental Industrial Hygienists Ainsworth Cyril Hayes D.F. Lamb H.G. Anderson D.G. Blake R.P. alternate Farrell Arthur A. ASA ASA ASA Staff Staff Staff Absent National Pounders Association International Association of Industrial Accident Boards and Commission International Association of Governmental Labor Officials j SUTO020' -2- 29/29 December 3 1947 Absent cont Fhe Greenburg Leonard Kane John M. Bureau of Ships rep Katz S.H. i\ Kelsay Ray Massari 3.C. Miner H.L. Monroe R.W. Schrenk H.H. Silverman Leslie Witheridge W.N. Member Large Dust Control Equipment Association U.S. Department of Navy J.S. Department of War U.S. Department of Labor American Foundrymen's Association Manufacturing Chemists Assn of the United States National Electrical Mfrs Assn Bureau of Mines Member Large National Safety Council Review of Past Work of Z9 Committee After an introduction of those present Mr. Ainsworth outlined the history of the 29 project stating that it had originated as far back in ASA history as 1920. He stated that it had begun as a part of the basic ASA safety standards program and that in those early days there was not a full understanding or what was necessary to produce national standards The commit tee therefore had had difficulty in getting started This did not mean that there was not a need for national standaras in the field of exhaust ventilation for the committee had eventually produced the Pundamentals Relating to the Design Operation of Exhaust Systems and this code had been very and videly used He also stated that the 29 committee had under its Jurisdiction Safety in Electroplating Operations 29.1 Grinding Polishing and Buffing Equipment Sanitation Z43 a proposed Metal Cleaning Sanitation Code and one on Abrasive Cleaning Rock Drilling and Granite Cutting and it eas important that the 29 committee should be up to date in order to consider business arising in connection with these standards Purpose of the Meeting Mr. Ainsworth stated further that the ASA was not a technical society nor a trade associa- tion nor a research organization out was a means of coordinat- ing and correlating point of view could the ideas of many be established on people so that a single particular items He vent on to say that the ASA machinery was particularly applicable to the field of exhaust ventilation because there Here quite a few bodies at work all interested in producing standards and many regulatory bodies were considering the adoption of the codes among which there was very little uniformity He stated that it seemed that the time had come for greater activity on the part of the Z9 committee to eliminate some of the confusion which existed in this field and to establish a program which would be effective He SUTO020 -3- ~ Fatima 29/29 December 3 1947 explained that this did not mean that the work at present being done by the groups represented should cease but rather that the Z9 committee should stimulate the groups interested to bring their standards to the sectional committee Mr. Ainsworth then suggested that the committee discuss the picture as a whole before adopting a program since this meeting was of an organizational and general nature Cooperation of Other Organizations inquired if it would be possible Organizations Mr. Stern to get into the record the work which was being carried on by the various organizations He stated that he had personal knowledge that the American Conference of Governmental Industrial Hygienists was working on exhaust system codes later explained that the Industrial Hygienists had On this point Mr. Harris ( a little American Conference of Governmental a committee which was working on codes for use by governmental bodies that one of the essential problems to He believed however be decided before codes were written by the ACGIH or by any other groups was the question of upon what basis codes should be written upon with exhaust Sumary which of Problems The question of the basis codes should be written arose in connection this conversation and at other points in the discussion of the committee Dr. Hatch summed it up at one point by indicating that there were three kinds of codes 1 those which set up a maximum concentration having no specifications at all regarding engineering design 2 a second type was a code which was primarily an engineering document which it must be assumed was so good that if the engineering specifications therein were followed the hazards would be eliminated 3 a code which contained standards of accomplishment and requirements as to how the structure should be designed to seet standards of accomplishment In presenting this picture of the type of codes which were at present being considered in the field Dr. Hatch also stated that a good many codes that were being written for regulatory use were being drawn up without adequate representation from industry He pointed out that there was an additional difficulty in the fact that the administrative set varied from jurisdiction to jurisdic- tion The committee agreed that it ought to first enunciate a principle upon which it could proceed in its work It was stated that there were already existing ASA committees that had been turning out recommendations for allowable concentrations and that it would seem to be a duplication of effort if the 29 committee were to try to direct its efforts toward the establishment of concentration in various industries from which to start its work SUT0020 J | a a 7 ik candied 39/29 December 3 1947 Fundamentals Relating to the Design and Operation of Exhaust Systems As the committee's discussion proceeded It seemed that the consensus of the committee was that the 29 code on Fundamentals had stated standard requirements suf- ficiently upon which the committee could base standards for suggested engineering practice although it was be necessary to review the Pundamentals that it might in order to bring its provisions up to date the thought that heretofore industries but technical This discussion also developed codes had been developed for details relating to the exhaust ventilation prescribed for one industry were also applicable in some other industries although the materials were not the same but their physical characteristics could be handled by the same duct work or principles of exhaust Mr. Stern then suggested that it might be wise to prepare a process breakdown rather than a set of codes for individual industries and from these processes develop the fundamentals of design discussed earlier in the meeting The question was raised as to whether or not these fundamental requirements for design in various operations might not still be found in the Fundamentals Relating to the Design and Operation of Exhaust Systems which had been produced by the 29 committee in 1936 as a report but not as an approved American Standard Upon motion by Mr. Stern seconded by Mr. Harris it was unanimously VOTED that the subcommittee which haa developed the Fundamentals Relating to the Design and Opera- tion of Exhaust Systems >>> 1936 be reactivated with a view to expanding or revising them and that the chairman of the mittee was to select the of his subcommittee and subcommembers : that the subcommittee should make recommendations to the 29 committee Dr. Brandt was selected chairman of this subcommittee Subcommittee to Study Operations Discussion followed on the possibilitoyf duplication duplication of the work of the Zy committee because there were other organizations active or considering activity in writing codes or standards in the exhaust ventilation field SUTO020 157 + FY a 29/29 December 3 1947 r Ainsworth explained that in the organization of a sectional committee every effort was made to have all interests represented and should be avoided and He that therefore duplication could stated that the sectional commit- tee should stimulate activity and zations were to produce standards that if interested the work should be organibrought into the 29 committee for consideration of its value with regard to national adoption by means of the 29 committee through ASA There of implementing seconded by Dr. was a general discussion of this thought and upon moti Brandt it was unanimously ways and means > by Mr. Stern FOTAD that a subcommittee be set up whose purpose would be to study the Operations as distinguished from industries in which standards could and needed to be promulgated and that the chairman was to select the mittee and of the subcommittee members of his com- that this subcommittee was to report back to the main 29 committee Mr. Stern was selected chairman of this subcommittee Electroplating Operations 29.1-1941 Safety in Because earlier the meeting had been suggested a review or revision of Safety in Electroplating Operations 29.1-1941 be undertaken and a subcommittee set up for this purpose the earlier action was withdrawn and the 29 commit- tee agreed that electroplating be considered along with the operations which were to be studied within the scope or Mr. Stern's subcommittee Flan of Work In the work of the 29 committee prior to the war there had existed a Subcommittee on Scope and Pur- pase Discussion revolved around whether or not this commit- the should be reorganized or reactivated Some members of the committee felt that there was a need for revival of the old Scope and Purpose Subcommittee whose task would be to review the field of activity and also possibly to be available for questions of a general nature which might be submitted to the 29 sectional committee Others of the committee felt that the 29 committee as a whole had as one of its main purposes SUTO020 =f) '+ 3 ini -6- 29/29 December 3 1947 the establishment of policy in regard the direction of the work being reason for undertaken It was the 29 committee to considered that there be informed about the might be work or other organizations insofar as the work cerned and after further discussion and of its scope was con- upon motion by Mr. Stern seconded by Dr. Brandt it was unanimously VOTED that a subcommittee be appointed to review the present situation in the field of exhaust ventilation study- ing the work of other organizations or committees in other organizations in the field of exhaust ventilation to determine what the nature of their work was and how the scope of the 29 committee's work would be affected and that the chairman tee was to select subcommittee and of the subcommitthe members of his that back next this subcommittee was to to the main 29 committee meeting report at its r William Harris was selected chairman of this subcommit Election of Chairman Mr. Lamb the presiding chairman pointed out that the chairmanship of this sectional committee had been vacant for several years and it was in order to elect officers at this meeting Upon motion by Mr. Vallace seconded by Dr. Brandt it was VOTED that a Nominating Committee be to nominate car--flidates for the of chairmar~- selected position is chairman pro tempore Mr. Lamb appointed Messrs Stratton edderand room and returned to Cranch who report that recessed to an the Nominating adjoining Committee had selected Dr. Hatch as their unanimous nomination for the position of chairman On motion by Mr. Harris seconded by Dr. Brandt it was VOTED that the nominations be closed Mr. Lamb announced assumed the Chair the new chairman Dr. Hatch who then SUTO020 | 2.0 cr , 29/29 -7- December 3 1947 ware Plans for Next Meeting A date for ing of the sectional committee was discussed tentatively planned for Friday April 2 1948 subject to the call of the chairman the next meetand it was in New York City CYRIL AINSWORTH Secretary Z9 DFH January 28 1948 SUTO020 | > . ASA AMERICAN STANDARDS ASSOCIATION 70 East Forty Street New York,17 York,17 N./Y = Z37 216 NOT FOR PUBLICATION MINUTES ASA COMMITTEE ON MAXIMUM ALLOWABLE CONCENTRATIONS OF TOXIC DUSTS AND GASES 237 December 9 1947 . Subject to Confirmation at 10:10 Terminal The meeting was called to order by the chairman a.m. in Rooms 2944-46 of the Grand Central Building 70 East 45 Street New York 17 N.Y. Present Yant W.P. Chairman MatL Bloomfield J.J. APHA Bowditch Manfred MatL Cranch A.G. MatL Drinker Philip MatL also alt for R.A. Kehoe AIHA Greenburg L. ACGIH LAIABC Gurney S.W. NAMCC Hamilton Alice USDOPL Kay Kingsley CSA Lanza A.J. McCord C.P. Sands F.W. Schrenk H.H. Selby C.D. Skinner J.B. Sehl F.W. Snell M.A. Stratton R.C. Woody McI MatL AAOfIP NSC USDI BM MatL IAGLO Math NCB AIOFCE API Bonsib R.S. Alternate ! Chapman G.H. Alternate NAMCC Cook Warren A. Zurich General Accident & Liability Insurance Company Ltd Irish D.D. Dow Chemical Co. Low F.S. Westvaco Chlorine Products Corp : VanAtta F.A. Alternate NSC Ainsworth C. ASA Staff Lamb H.G. ASA Staff Bishoff F.M. Drinker C.K. Poulger John H. Haggard H.W. Hatch T.F. Absent USWD MatL MCA Math MatL Neal P.A. FSA Osborn Stanley H. VonOettingen W.F. Vosburgh B.L. PHS The chairman introduced the following new members of the committee Mr. J.B. Skinner representing the International Association of Governmental Labor Officials Dr. Kingsley Kay liaison representative of the Canadian Stand- ards Association and Mr. F.W. Sands representing the National Safety Council SUTO020 5 ER -2- 237/216 December 9 1947 1 that the 237/206 119. Approval of Minutes The secretary reported minutes of the last meeting been circulated as After a brief discussion these minutes were approved as circulated 120. Silica Min 114 The chairman reported that Dr. Lanza had assumed the chairmanship of the Silica Subcommit- tee since the demise of Dr. Gardner who had been chairman Dr. Lanza explained that he had assumed chairmanship of this committee so recently that he had not had an opportunity to function properly or to call a meeting of the subcommittee He further explained that during the past two years develop- ments in exposures to silica had undergone new phases as a result of which there was some confusion and he believed a good deal more be done before of both research and they could formulate clinical work would have to a standard on this substance The chairman explained that if the Committee felt that it could not promulgate a regular standard at this time because of lack of information on which to base such a standard it might be possible to prepare a tentative standard or in case of furtner doubt they could merely prepare a statement of the situation as it existed at this time giving the reasons for not arriving at a standard and any other pertinent information available at the moment on this particular substance so that anyone making inquiry from the ASA could at least be given the viewpoint of the committee Dr. Lanza agreed to prepare a statement on silica for consideration by his subcommittee after which it would be sent to the secretary for circulation to the full Committee for comments and suggestions If the Z37 committee indicated agreement on the statement it could then be published if however there were any objections the comments and suggestions would be held further discussion at the next meeting 121. Fluorine and Fluorides Min 113 The chairman reported that he had talked with Drs Prary Kehoe and Neal on this subject and they believed that they were not ready to recommend a standard on fluorine and fluorides There was some good work going on at the present time and there were indications that some additional investigations would be undertaken in the near future It was hoped that enough information would be available within a reasonable time to justify waiting 122. Methyl Chloride Min 115 Dr. Schrenk as chairman of the subcommittee reported that his subcommittee was in timous agreement on one point namely that the maximum allowable concentration should not be more than 100 ppm He read a letter he had received from Dr. Neal in which Dr. Neal explained that he had discussed this subject with others and they were of the opinion that 1 The duration of exposure was at least as important as concentration 2 The SUT0020 1 TFikay -3- 237/216 December 9 1947 duration of intervals between exposure was an important factor and 3 There was a wide range of variability between individ- uals Dr. Neal thought that methode analysis routinely used in most plants were only roughly planned and if 100 was considered permissible this lack of precision might lead to the acceptance of concentrations of several hundred and that an atmosphere which showed 100 at the time of testing might at other times have a higher degree of contamination He believed that a permissible limitation of 50 should be recommended Dr. Schrenk reported that the governmental hygienists in their last list had recommended 100 ppm Dr. Irish reported on actual experiences they had had recently with methyl chloride and they had come to the conclusion that concentrations of 100 ppm would give them no difficulty provided they didn't have many peaks above this figure Actually there was no clean cut picture on the subject since no plant had a level of exposures but if a plant did have a low level of exposure they could tolerate some peaks actually if they were dealing with an exposure in the neighborhood of zero as was the case in many operations with occasional quite high peaks it would be possible to tolerate much higher peaks Their experience had indicated that 100 ppm was not a bad standard provided they did not tolerate peaks beyond 200 ppm and they got a reasonable : . amount of safety as a result ; After further seconded by Dr. McCord discussion upon motion it was unanimously by Dr. Schrenk VOTED that the proposed standard on Methyl Chloride be submitted to letter bal- lot of the Z37 committee for approval as an American Standard 123 Carbon Tetrachloride Min 111 The chairman reported that he had a letter from Dr. von Oettingen chairman of this subcommittee that he had discussed the question with Mr. Low and Dr. Irish and they had agreed that they still did not have sufficient information to establish a standard on this substance Mr. Low reported that he believed that in view of the fact that studies and work on this substance were now going ahead it would be unwise to attempt to promulgate a standard at this time He added that the manufacturers of carbon tetrachloride had held a meeting about a year ago and approached the University of Rochester take a study of this on human subjects which agreed beginning at to underlimits that were were so low that there would not be any trouble particularly anxious to obtain information as to They what ry SUTO020 -4- 237/216 December 9 1947 4 levels evidence of discomfort headache nausea etc appeared At that time they learned that Dr. Irish was carrying on an elaborate program of experimental work and the early results indicated that the limits might have to be set lower than had been contemplated It was therefore deemed advisable to hold up the work they were planning until Dr. Irish had had a chance to conclude his work Dr. Irish stated that since carbon tetrachloride was a substance that had been handled for a great many years and since it was very complex and very difficult of interpretation he believed it would be well to finish their studies so that there would be a good solid foundation basis upon which to set a standard They had been working on this substance intensively for 3 or 4 years and he believed they were getting information that would give them a fairly firm foundation and he believed that under the circumstances it would be more desirable await to the conclusions of their investigations before setting a standard . Dr. Drinker pointed out that recent data collected by governmental hygienists which had appeared in a recent issue of INDUSTRIAL HYGIENISTS DIGEST had indicated that states had adopted varying figures of 50 75 to 100 as the MAC for this substance Mr. Skinner reported that while Massachusetts had set 50 as the standard they would rather see it at 35 because they had had cases especially in young girls with concentrations below 50. Dr. Hamilton raised the question as to whetner it was the intention of this Committee to set the MAC at the point where discomfort nausea vomiting etc occur or at the point where systemic poisoning occurred Mr. Ainsworth believed that this committee had never indicated what it meant by an allowable concentration either from the general point of view or in any individual instance nor had there been any statement in any of the standards to indicate whether the standards had been set at the discomfort point or at the systemic poisoning point . . The chairman remarked that this committee had issued a statement in 1946 giving their position on carbon tetrachloride and after further discussion upon motion by Dr. Irish seconded by Dr. Selby it was unanimously VOTED that it was the sense of this committee that the statement on carbon tetrachloride 237.17 was still applicable to the present knowledge on this subject SUTO020 -5- 216 December 9 1947 124 Radium and Radon Gas Min 116 Dr. Greenburg chairman of the subcommittee reported that at the last meeting of the Z37 committee he was authorized to expand his subcomit- tee but due to the war conditions and the rapid developments developments that were occurring in the field he had been unsuccessful until very recently They had added Dr. Karl Morgan of Oak Ridge Dr. James H. Sterner of Eastman Kodak Co who had had considerable experience during the war and Dr. Bailey of the University of Rochester He believed that within the or 4 months his committee would be able to come to a next 3 conclusion on radium and radon gas and he expected to have a final report ready for the committee at that time He also indicated that there were several other scientists who could help his subcom- mittee but these men were unavailable to attend meetings It was his intention to carry on correspondence with all these people so that his committee would have the benefit of thei thoughts 125. Cadmium Min 106 The chairman recalled that the draft of the war standard had been prepared by the U.S. Public Health Service After conferring with Dr. Neal he had asked Mr. Bloomfield for a recommendation with regard to the cadmium standard He had received a letter from Mr. Bloomfield which suggested that the war standard satisfactory and recommending that it for cadmium had proved should be adopted as a regular American Standard Mr. Drinker agreed that the present concentration of 1 milligram per 10 cubic meters standard for workers exposed to of air was a very desirable cadmium fumes such as from welding cadmium plated objects but he did not believe that this concentration was a fair maximum to apply in the few large plants which were engaged in refining cadmium oxide He recalled that there had been a recent paper in the Journal of Industrial Hygiene by Dr. Princi of the Medical School of the University of Colorado on this subject and he understood that this author was making a further study at the present time con- cerning the workers that handled the crude cadmium oxide It the appeared that there was a considerable difference between exposures to the olive drab dust in its crude form as compared to fume given off from burning or from heating the cadmium metal Mr. Van Atta reported that his experience would bear out the thought that the crude cadmium oxide dust did not present as much hazard as the fume discussion as whether it would be There was practical considerable to have two standards on cadmium one for the fume and the other for the dust and also as to whether the committee should now approve a regular Americar Standard or whether further information was necessary in which case a document might be prepared as a tentative standard SUTO020 6///2 7 | -6- 237/216 December 9 1947 it was Upon motion by Dr. -seconded by Dr. Woody VOTED that the Z37 committee issue the technical material contained in the present American War Standard Allowable Concentration of Cadmium as a tentative standard and that the subcommittee on cadmium be instructed to continue to study this problem It was agreed that Dr. Princi and Dr. Dudley Irwin be invited to serve on this subcommittee It was further agreed that the editing subcommittee prepare a statement for inclusion in the tentative standard to the effect that further work and study was continuing on this subject 126. Manganese Min 106 The chairman reported that the U.S. Public Health Service Institute of Industrial Hygiene which had Manganese believed almost solely handled that the war standard the was War Standard on satisfactory seconded After by Mr. some discussion Stratton it was upon motion unanimously by Dr. Woody VOTED that the American War Standard on Manganese be submitted to letter ballot of the Z37 committee with the recom- mendation that it be approved as a regular American Standard 127. Arsenic Min 106 The chairman recalled that Dr. Drinker had written to the 237 committee some time ago requesting reconsideration of the American War Standard Maximum Allowable Concentration of Metallic Arsenic and Arsenic Trioxide . Dr. Drinker stated that he had no fault to find with the present maximum concentration of 1.5 milligrams of arsenic per 10 cubic meters of air for arsine He thought that this ought to be around one or two parts per million considering it as a gas He did not however believe that there was data to support the concentration of 1.5 milligrams when consider- ing arsenic trioxide In fact he sufficient evidence available from believed that there was the Public Health Service SUT0020| _ -7- 237/216 December 9 1947 x and the ferrous mining industries to justify a higher value He reported that Utah had arbitrarily set a value of 5 milligrams per 10 cubic meters and he did not believe that even this was high enough He recalled that there had been a paper published in the Industrial Journal of Hygiene some time ago reporting that there was something like 4 to 10 milligrams per meter of arsenic trioxide in ordinary tobacco smoke It was his impression that the concentration of this dust was quite high in plants producing arsenic Although there had been cases of dermatitis in these plants he did not know of any cases of systemic arsenic poisoning Dr. Hamilton stated that her experiences confirmed Dr. Drinker's thoughts She had been amazed to see how harmlessly this material was handled like sand Dr. McCord asked if there was any possibility that the lack of systemic poisoning in this industry might be due to the fact that individuals built up a tolerance to this chemical This matter of tolerance was considered in the medical profession when administering arsenic for therapeutic purposes Both Dr. Hamilton and Dr. Drinker recalled that there was a reasonable amount of labor turnover in this industry and that therefore the fact of building up tolerance was not too important Dr. Selby asked if there was a real need for a maximum allowable concentration of arsenic The chairman recalled that at the time of developing the war standard there had been considerable discussion as to whether this should include arsine and arsenate of lead but the standard had been specifically limited to metallic arsenic and arsenic trioxide The standard had been developed as a war standard because of certain possible uses of arsenic in the war effort Selby Upon motion by Mr. it was Bloomfield seconded by Dr. VOTED that a letter ballot of the 237 committee be taken on the withdrawal of the present war standard for arsenic with recommendation for its withdrawal and that a subcommittee be set up to consider first the need for a standard on arsenic and if a standard was deemed necessary to make recommendations concerning the technical content of the standard Dr. Drinker stated that he did not wish to be a member of the arsenic subcommittee but he would be very gl~ d to make available to the committee the technical data which SUTO020| -8- 237/216 December 9 1947 was in in his files we 128. Styrene Monomer Min 106 The chairman reported that Dr. on this substance Irish who had stated had prepared the war that they had had a standard great deal of experience since the standard had been issued and he saw no reason for change They had maintained their plant at 400 with no difficulties Mr. Cook had favored 200 on the basis of statements of a number of people who had been in contact with it suggesting that Irritations developed at concentra- tions of less than 400 After further discussion upon motion by Dr. seconded by Mr. Sands it was unanimously Irish VOTED that the American War Stariard on Styrene Monomer be submicted to letter ballot of the 237 committee with the recommendation that it be reapproved as a regular American Standard 129. Xylene Min 106 Dr. Greenburg who had prepared the war standard did not believe there was any need for change and upon motion by Dr. Woody duly seconded it was unanimously VOTED ~- that the American War Standard on Xylene be submitted to letter ballot of the Z37 committee with the recommendation that it be approved asa regular American Standard chairman reported of 130. Min 117 The action taken at Cyclohexane Cyclohexanol Cyclohexanone that in accordance with the the meeting November 20 1945 Dr. Kehoe had been appointed as chairman of a drafts of a standard on these three subcommittee substances to prepare Dr. Kehoe had advised the chairman by correspondence that his buocom- mittee had been formed and considerable progress had been made in preparing a draft on these substances announced 131. that Nitroparaffins Min 117 The chairman in accordance with the action taken at the meeting of November 20 1945 Dr. chairmanship of a subcommittee to paraffins By correspondence Dr. work was not quite completed but Kehoe had also accepted draft a standard on nitroKehoe had reported that he hoped to have a draft on this subject in the near future SUTO020 |i 2% -9- ; - a ws 237/216 December 9 1947 132. Chlorine Min 117 that at the meeting of November 20 The chairman recalled 1945 it was agreed that a subcommittee should be formed to consider a standard on chlorine He asked Mr. Stratton in view of his war experiences with chemical warfare if he would be willing to serve as chairman of such a subcommittee Mr. Stratton accepted would 133. Welding Dr. Drinker if he Fumes Min 117 The chairman asked serve as chairman of a subcommittee to prepare a draft standard for welding fumes Dr. Drinker accepted this assignment He indicated that the U.S. Public Health Service was about to publish a study on welding fumes and he believed that it would be possible to prepare a draft very shortly after the publication of this report 134. Research Committee The chairman reported that this committee had been appointed for the purpose of ascertaining the situation with respect to research work now being done what were good institutions to produce such work if they already existed or what institutions had facilities that might be interested in doing such work Dr. Kehoe who was chairman of this committee had reported that the committee had not done much nor had it come to any con- clusions It was Dr. Kehoe's intention to get information on the number location and type of facilities available for research in this field Dr. Irish was of the opinion that there were so few research facilities as compared to the reed and demand for them that there would be many advantages in having additional facilities made available It was the general agreement that if the Research Committee of Z37 assembled facts and came out with such a statement that it might prove beneficial 135. New Substances Min 117 The chairman recalled that at the last meeting at Dr. McCord's suggestion it had been voted to change the personnel of this committee It had been agreed that Mr. Bloomfield should act as chairman and the following members had been asked to assist him M. Bowditch A.G. Cranch P. Drinker W.J. McConnell C.P. McCord H.H. Schrenk The chairman urged all members of the Z37 committee to submit any suggestions which they might have for new substances which should be considered by this committee There were two major factors in selecting a substance for standardization -- first there should be an important need or new need for a MAC for the substance and second the substance should be one upon which there was sufficient information to justify a standard upon which the committee could agree SUTO020 -10- 237/216 December 9 1947 It was suggested that there was a need for a stand- ard on beryllium would appear that but from the discussion which followed it there was not enough information available at the present time upon which to base a standard Mr. Stratton reported that during the previous week Sectional Committee on Exhaust Systems 29 had met and in discussing their work they had agreed that they would look to the centrations Z37 for committee to set up maximum allowable various substances and would consider con- that their work would then deal with engineering and design require- ments to obtain these values He therefore believed that the Z37 committee stances which should endeavor to were of importance provide standards on to the Z9 Committee subThe chairman suggested mittee to indicate that if it were possible for the 29 Com- a list of substances in the order of their importance such a list would be of great help to the Com- mittee on New Substances The chairman reported that a letter had been received from Mr. P.W. Jacoe Industrial Hygiene Section of the Colorado Department of Public Health asking for information concerning a maximum concentration for referring this letter to the Committee zinc stearate He was on New Substances for recommendation Standardization 136. Safety in Photography the Sectional Committee on It was reported that in the Field of Photography 238 had made a request to the American Stand- ards Association that its scope be enlarged to include safety in the field of photography including hazards to personnel Dr. Fairhall had written to the certain photographic chemicals ASA calling attention to In the general discussion which followed it appeared that most of the photographic chemicals which affected the safety of employees were of a nature affecting the skin rather than developing toxic dusts or gases It was agreed that the Z37 committee was not particularly concerned with this subject subject * 137. Textile Safety Code The secretary reported _ that recently the American Standard Safety Code for Textiles Ll had been revised In addition to bringing the standard up to date with regard to machine guarding etc the Ll Committee believed that there should also be a standard on had temperature humidity and dust control within textile plants One of the members of that committee thought that as far as the concentration of dust was concerned and perhaps also the maximum temperature and maximum humidity these subjects should be feferred to the 237 committee SUT0020 -11- 237/216 December 9 1947 1 Dr. Drinker announced that a study on control of dust in cotton textile plants had_heen going on over a two year period This study had also included some work on temperature and humidity In the discussion which followed it was generally agreed that the subject of dust in the textile industry was included in the present scope of the 237 committee but there was some question as to whether or not the present scope would include requirements on temperature and humidity 138. Scope Min 107 The chairman suggested that it might be well to consider the scope of this committee At present it included maximum allowable concentrations of harmful gases vapors dusts fumes and mists In humidity it to inclusion as rays or addition to the subjects of temperature and was suggested that consideration might be given of the concentration of harmful radiation such radio active substances Dr. McCord suggested that in the future there might be a real need for maximum concentrations of ultrasonic vibrations The secretary reported that the American Standards Association already had a committee on Accoustical Measurements and Terminology Z24 but he did not believe that their scope would include setting limits concerning the ; harmful effects of vibrations Dr. Selby suggested that the consideration of nuisance dusts was becoming more and more important Although these might not be considered as toxic they definitely affected the comfort of workmen and sometimes played an important part in accident prevention Dr. Schrenk suggested that if the scope were changed to include industrial atmospheric environment it might possibly be considered to include all of the items which had been discussed . it was Upon motion by Dr. McCord seconded by Dr. Woody VOTED . that it was the sense of this meeting that its scope should be enlarged to include additional subjects important in the industrial atmospheric environ- ment in accordance with the discussion at this meeting and that the Editorial Subcommittee be requested to prepare a detailed wording of a revised scope and that this detailed wording be referred back to the 237 committee for action SUT0020 (|/7 |B J 216 -12- December 9 1947 ; ~ ant i 139. Executive Committee The chairman recalled that some years ago the Z37 committee had an executive committee of about 8 members for the purpose of handling minor details for the committee and thereby conserve the time of all of the members of the main committee In the discussion which followed it was explained that the executive committee would not have the responsibility or authority to adopt or reject standards Drinker Upon motion by Mr. it was Stratton seconded by Dr. VOTED that the Chair be empowered to appoint an Executive Committee of 8 or 10 members in order to expedite the work of this committee between full committee meetings 140 Drafting Committee The chairman recalled that according to the records the 237 committee had a Drafting Committee which had functioned in the past but at the present each subcommittee on a particular substance had prepared its own draft subject to approval of the Editing Committee and the Drafting Committee did not appear to ful- fill any particular function at the present time Upon motion duly made and seconded it was VOTED that the Drafting Committee be discharged 141. Susceptibility of Women and Childred to Toxic Substances Min . The chairman reported that dur- the war & special subcommittee had been appointed to consider the possibility of special concentrations for women and children This committee had not prepared any definite standards and since the end of the war it would appear that there was very little need for such standards Upon motion duly made and seconded it was VOTED that the Subcommittee on Special Standards for Women and Children be discharged SUTO020 L- L- L- -13- 237/216 December 9 1947 we 142. Personnel of 237 Committee The chairman ~- recalled that through subcommittee work this committee had received considerable help from several men in the field of me industrial toxicology who were not members of the 237 committee There was a general discussion of possible new members of the committee it was Upon motion by Dr. Drinker seconded by Mr. Bonsib VOTED that Messrs Warren A. Cook Hervey B. Elkins D.D. Irish Willard Machle Norton Nelson and Henry F. Smyth be invited to serve as Members on the Z37 Committee 143. General Policies committee of Proposed Standards Min 29 this committee had several years Concerning Form and Content The chairman recalled th"t ago adopted a general format for the preparation of standards on various subjects He believed that it was helpful to occasionally review such fundamental considerations to see whether or not improvements could be made . Dr. Drinker reported that in his teaching work it had been difficult sometimes to explain that maximum allowable concentrations were not precise figures but might indicate more nearly a range of hazards He explained that he had considered the possibility of grouping substances into various zones for comparative purposes By means of a blackboard he showed 5 proposed zones as follows Zone 1 Concentrations greater than 500 ppm for such substances as gasoline acetone ethyl ether ethyl chloride etc. Zone 2 100 to 500 ppm for such substances as carbon monoxide methanol teluol methyl ethyl ketone Zone 3 10 to 100 ppm for such substances as benzol carbon tetrachloride hydrogen sulfide Zone 4 . 0.1 to 10 chlorine gases ppm for such substances as hydrides arsine lethal war Zone 5 Less than 0.1 ppm for radio active gases , SUT0020 | 3% -14- Z37 December 9 1947 4 Dr. Drinker explained that a system of zones was set up it would probably be much easier substances to zones rather than to set up an to allocate exact figure for a maximum allowable concentration He believed that for practical engineering the use of these zones would be entir~ ly Batisfactory Mr. Cook stated that he had given some study to this idea and thought that in general it had many fine possibilities It was particularly useful in explaining toxicity to people who were not too familiar with the subject subject of toxicity Dr. Schrenk believed that the fundamental idea had merit but believed that it would require determine just how many zones were needed some study to and just what the limits of each zone should be in order to reduce as far as possible the borderline cases In the general discussion which followed it was suggested that it might be necessary to put carbon monoxide in a different zone Dr. Hamilton suggested that it might be advantageous to divide Zone 2 into two groups on the thought that several substances might be tolerated at 200 ppm but might be harmful at 400 or 500 ppm The chairman recalled the previous discussion at this meeting where it had been agreed that 100 ppm was acceptable for methyl substance might prove chloride harmful but Mr. 200 or more ppm of this Cook suggested that the idea of these zones probably should not replace maximum allowable concentrations which had been developed and approved but might be very helpful on a large number of additional substances on which the committee did not believe that there was sufficient information to provide a definite concentration It was agreed that this subject should be given ; . further study Meeting 144. Plans for the Next It was sug- gested that because of the need for work by this committee that plans should made to hold meetings at such intervals as to promote the progress of this work It was considered that probably two meetings a year would be profitable In order to help the members to plan their schedules in advance it was tentatively agreed that the next two meetings should . be held on June 2 and December 1 1948 journment The meeting was adjourned at 3:45 p.m. Reported by F. KwartlerP.H. Gruver HENRY G. LAMB Secretary February 3 1948 _ SUT0020 AMERICAN STANDARDS ASSOCIATION ** Sust forty Gith Street New York 17 NY 19/33 PRIVATE COMMITTEE DOCUMENT NOT FOR PUBLICATION MINUIES MINUIES ASA SECTIONAL COMMITTEE ON SAFETY CODE FOR EXHAUST SYSTEMS 12 May 4 1948 Subject to Confirmation The meeting was called to order by Mr. Theodore f Hatch chairman at 10:00 a.m. in Room 2946 ASA offices TO East 45 Street New York City resent Grandt Allen D. Dorfan M.I. alt for W.O. Vedder Greenburg Leonara Harris W.B. Hatch T.F. Chairman Joffman E.E. Katz S.H. Stam O.G. Stern Arthur C. Stratton Reuel C. Yedder W.O. American Public Health Foundry Equipment Mfrs Assn Assn Large American Conference of Govern- mental American National Industrial Hygienists Industrial Hygiene Assn Paint Varnish & Lacquer Association 7.S. Department of War International Acetylene Assn American Society of Mechanical Engineers Assn of Casualty & Surety Cos Foundry Equipment Mfrs Assn ASA Staff Hayes D.F. Lamb H.G. Absent Anderson D.G. Blake R.P. alternate Farrell Arthur A. Kane John M. Bureau of Ships Kelsay Ray Martin Alex Massari S.C. Meigs Ralph R. rep National Founders Association International Association or Industrial Accident Boards and Commissions International Association of Governmental Labor Officials Dust Control Equipment Assn 7.S. Department of Navy J.S. Department of Labor National Assn of Fan Mfrs American Foundrymen's Assn National Assn or Mutual Casualty Cos SUTO020 LJ= 74 , -2- amend 09/33 ! May 4 1948 absent cont Miner H.L. Monroe R.W. Schrenk H.H. Seifert Harry E. Silverman Leslie Witheridge W.N. Rousseau A. Manufacturing Chemists Assn of the United States National Electrical Mfrs Assn Bureau of Mines U.S. Public Health Service Member National Safety Council Grinding Wheel Mfrs Assn Approval or Minutes Mr. Hayes reported that the minutes of the December 3 1947 meeting had been circulated as 19/29 and that no comments or corrections had been received Upon motion duly made and seconded it was 70TED that the minutes of the meeting or December 3 1947 29/29 be approved as circulated Appointment of Secretary Mr. Hayes informed the committee that at the last meeting no action nad been taken in regard assume to the secretarysnip or 29. de suggested that the secretaryship if the committee so desired he could and the sponsor the International Association of Industrial Accident Boards and Commissions indicated its assent The committee agreed that this action should be taken Report of Subcommittee on Fundamentals Dr. Brandt chairman of this subcommittee reported that he had corresponded with his subcommittee and had received a fairly substantial num- ber of comments directed to the revision of the Fundamentals Relating to the Design and Operation which this subcommittee was working of Exhaust Systems on On oeing asked whether the work so far done by his subcommittee was available to the other members Dr. Brandt agreed to write an imterim report and send copies and comments to those who had asked for them Copy of report is attached hereto He stated that it might be found necessary to rewrite the code wnicn could take hill the end of the year Report of Subcommittee on Operations The chairman stated that the subcommittee which had been set up at the time or the reorganization meeting of the sectional committee with Mr. Stern as chairman had reviewed the field of work involved and had presented a intended to provide series of basic operations which was the greatest possible coverage of operations throughout industry He explained that Mr. Stern's subcommittee cad attempted to categorize industrial substances into ten broad divisions with some subdivisions with a view to arriving Dal | SUTO020set ba Jt & T UU { 39/33 -3- May 4 1948 at a reasonable program man requested Mr. Stern for the to take sectional committee over at this point The chair- Mr. Stern stated that he thought the report would of --peak for itself and requested the committee's reactions to the headings which had been compiled Discussion on the plausibility setting priorities on the preparation or the items as they appeared in the subcommittee report followed Copy of this report is attached hereto It was pointed out that wherever there were existing standards pertaining to speci- ications written into the proposed standards proper reference should be made to them During this discussion it was also pointed out that it would be most desirable to undertake those items on the list which could be accomplished within approximately a year's time On motion by Dr. Greenburg seconded by Dr. Brandt it was unanimouslunanimyously TOTED that the report subcommittee de the committee's of Mr. Stern's accepted with thanks Upon further motion duly made and seconded it was nanimously JOTED that the chairman appoint a subcommittee to draft items 2 and 3 of the report this subcommittee to handle both items and that this subcommittee be instructed to months bring in a report within six ' time at which time an effort would be made to have the completed assignments presented as proposed standards and that a separate subcommittee be appointed to do a similar job on item 4 also to report within six months cehairman stated that in his instructions to the subcommit rees he would explain that the chairman of the subcommittee on items 2 and 3 was requested to set up two groups each respon- Jible for one part DUE the subcommittee chairman being ] 157 UQ SUT0020 157 T on 157 ' - -4- 29/33 May 4 1948 for responsible for their parallel structure At the request of of the subcom- the chairman Mr. Stern accepted chairmanship mittee to develop standards for Surface Coating Operations item 2 and Open Tank Operations item 3 the chairman for the Subcommittee on Solid Materials Handling item will be named by Chairman Hatch of Subcommittee on Scope and Flans The chair- Report subcommittee for man called upon Mr. Harris chairman of this which Mr. Harris read Mr. Harris stated that his a report report was in two parts the first on status of the work in other committees and the second on recommendations as to plans and scope of the 29 committee with the It was decided that this report should be circulated minutes and accordingly copy is attached hereto a General Discussion on Work of the Committee The shairman stated that the ASA project on Safety Code for Exhaust had had a long career during which there had been oursts Systems that the committee or activity and inactivity He suggested cake the work seriously and as its immediate objective assign and accept certain definite jobs with view to some concrete results in as short a time as possible He went on to say that it would probably be more effective to a se ntd lthiamtitetdhe objectrives eovbjiescitiovnes of than to attempt to cover a wide field the Fundamentals was one of these that it could hope to be accomplished After some discussion on the appropriateness of creating a small Executive Committee to coordinate the work carried on on the various items it was the general conbseeinnsgus of the meeting that this could be effectively done by The sectional committee itself The chairman then stated that he would like to raise the question of what the most important thing was that the 29 committee was trying to accomplish It seemed to him to be most important to develop in the fields of industry designs and fundamentals analysis He stated further that the cost or building and maintaining systems without the application of fundamentals was frequently costing industry many appropriate and stated that he thousands of dollers Mr. Vedder agreed believed there was need for educational work along these lines and too little was done by manufacturers of actual dust produc- ing equipment This Machinery was frequently purchases without any facilities for collecting dust and often a local mechanic was hired to put the housing on the equipment SUTO020 ow reer 6 bh. lan ha rf ree -5- 29/33 May 4 1948 further discussion it was agreed that each During member committee had the responsibility of member of the sectional by the 29 com- back to his group standards and in taking them within his own organization mittee and promoting immediate concrete step was taken toward giving asked to addition an further publicity to the problem Mr. Vedder was some for use in INDUSTRIAL STANDARDIZATION Mr. prepare a statement received would be Hayes agreed to see that the article when distributed to the appropriate trade magazines of the discussion the Coincidental with this phase of a small chairman requested Mr. Vedder to serve as chairman and means of further promoting subcommittee to study ways with the Fundamentals in an familiarity in the industry clear to them to reach those concerned and to make to attempt fundamentals applicable the that there were scientific were then suggested design of exhaust systems whiOcrhgantihzisatiwoonrsk could be carried on as possible media through suggested were the American Society or Heating Association Foundrymen's among those American Foundrymen's and Ventilating Engineers the and other societies such as the insurance companies electroplaters society whether the word Safety Dr. Greenburg questioned and wondered 12 in the title or the project was necessary to have it omitted Mr. Hayes agreed and It would be possible involved make inquiries in regard to the question to omission of the word Plans for Next Meeting It was agreed that six from the date of this meeting would be a reasonable months committee could again meet to date on which the sectional receive reports on the work Hayes Secretary 29 OPH PH June 5 1948 SUTO020 2) UD -- x ' REPORT OF SUBCOMMITTEE ON PUNDAMENTALS 29/33 Fundamentals This is an interim or progress report of the appointed to review and revise Fundamentals Design and Operation of Exhaust Systems subcommittee Relating to the or the Sectional Committee in New York Following the meeting chairman of a December 3 1947 at which time I was appointed as to revise the existing document I appointed subcommittee men Leonard members of this subcommittee the rollowing R.D. Madison G.E. McElroy Greenburg W.B. Harris J.M. Kane Leslie Silverman and W.N. Witheridge 3.F. Poftman R.T. Fring Fundamentals Relating to Copies of the existing publication or Exhaust Systems along with a subcom- the Design and Operation of the members of the sent to each covering letter were that they submit suggested revisions mittee with the request them for discussion and changes to me so that I might summarize All mem- which was to be neld shortly thereafter at a bers eeting 2 the subcommittee submitted suggested revisions the attached and changes hecto- n 3 these were summarized as shown on graph copy of Comments . ^ meeting of this subcommittee was schedu for May 3 1948 Unfortunately to consider the suggested revisions atnhde c unhdaenrgseisgned were able only five of the members Alilnclcuodmimnegnts submitted by the various to attend this meeting that the mis- members were considered and it became apparent and of this subcommittee was going to be one of rewriting sion existing code To accomplish reorganizing to a large extent the the contents of the existing document will be separated of the sub- this and distributed to the various members by sections committee for rewriting signed Allen D. Chairman Brandt ADB MAB TD, SUTO020 _ al fi" fi" 19/33 ate May 4 1948 Kr Theodore Hatch Chairman SA - 29 Committee FROM committee on Industrial Operations JUBJECT committee Report Your committes held two meetings on Janua ry 7th and March 17th 1948 respectively both at 80 New York The first meeting was attended Centre Street New York by Messrs Bradley Eenaricks devising Postman and Stern the second by Mesers Bradley Brush Harris Hendricks Kane and Stern At the first meeting Mr. Stern distributed to form the basis for discussion <2 1 list of industrial operations the interims between the two meetings Messrs Bradley Brush Harris Jendricks Kane and Postman prepared and sent to all committee members lists of industrial operations of their own together with comments on these lists Also in the interim tween the two meetings a letter was received from Dr. A.G. Cranch clining appoint- sent to this committee and suggesting the appointment of Mr. Stam in his steed This letter was received too late to include Mr. Stam in The March 17th meeting At the March 17th meeting the list of industrial operations appended hereto vas agreed upon and the following recommendations to the 2-9 committee adapted 1. Exhaust system standards should be industrial operations listed from # to 10 prepared for each inclusive on the of the appended list 2. Priority of preparation should be given to operations listed from # through 4 inclusive on that list Respectfully submitted 4.R. Bradley 1.F. Brush .B Harris 1.V. Hendricks 7.M. Kane 3.F. Postman Signed Arthur C. Stern Chairman committee on Industrial 19 Committee ASA Operations SUTO020 29/33 -3- May 4 1948 LIST OF INDUSTRIAL OPERATIONS FOR WHICH EXHAUST SYSTEM STANDARDS SHOULBDE PREPARED :, Mechanical Cutting and Abrading Operations Definition Mechanical cutting and abrading operations mean ill operations involving cuttoitnhgermascimhiilnairngopesraantdiionngs gon riwnodoindg pploalsitsihcisng Snuffing snagging sawing or abrasive blast- rubber metal or other solid materials but not including ing or rock cutting as defined below 1 a Abrasive Blasting Operations Definition Abrasive blasting operations mean the of blasting metal or other materials by means of abrasive process of removing sand rust scale or or metallic particles for the purpose the physical characteristics paint to produce certain finishes or change of the material 1 b Bock Cutting Operations Definition Rock cutting operations mean drilling sawing chipping channelling brosching or crushing to excavate rock in place in the earth by means of machinery or hand hammers 2. Surface Coating Operations Definition Surface coating operations mean all operations involving the application of protective decorative adhesive or coating or impregnation to one or more surfaces or into strengthening or material by means of spraying spreading the interstices of any object similar seans and flowing brushing roll coating pouring cemenbtuitngnotor including open tank any subsequent draining or drying operations sperations 3. Open Tank Operations Definition Open tank operations mean all operations the immersion in liquids or in the vapors of such liquids of miantveorlivailngs for the purpose of cleaning or altering the surface or adding a finish thereto or changing the character of the to or imparting removal from the liquid or vapor drain- materials and their subsequent ing and drying These operations include wasning plating anodizing bleaching degreasing pickling quenching dyeing tanning dressing rinsing digesting and other similar alkaline cleanir stripping processes but L including molten materials operations rr SUTO020 || +3 , 1049 - a Q 4, Solid Materials Handling Operations Definition Solid materials handling operati rean all operations involving crusning screening charging mixing conveying jumping loading drying tumbling milling feeding filling packaging discharging opening weighing storing and similar handling of solid materials other than fibres capable of producing an airborne dust when so handled 5. Fuel Burning - Exhaust Gas Producing Operations Definition Fuel Burning - Exhaust Gas Producing Operations sean all operations involving the dilution or disposal of exhaust gases resulting from the combustion of a fuel in industrial process equipment or in vehicles operating in any occupied enclosed space but not including any stationary fuel burning equipment used primarily for space heating or power the exhaust gases of which are discharged to the atmosphere outside of the workroom through a chimney stack or flue 5. 5. Molten Materials Handling Operations Definition Molten materials handling operations mean all operations other than welding burning and soldering operations involving the use melting smelting or pouring of metals alloys salts or other similar substances in the molten state These operations shall include heat treating baths descaling baths die casting stereotyping type casting sand casting permanent mold casting and similar operations 7. Welding Burning and Soldering Operations Definition Welding burning and soldering operations mean all operations involving the use of a flame an electric arc a heated utensil or device or heat generated within the materials being processed for the purpose of joining severing piercing we cleaning one or more pieces of said materials or for altering the physical characteristics or the material but not including molten materials handling operations 9. Fibre Handling Operations Definition involving the handling Jur asbestos or other Fibre handling operations mean all operations processing spinning or weaving of cotton wool organic or inorganic materials constituted or threadlike or fibrous elements 9. Volatile and Gaseous Material Handling Operations Definition Volatile and gaseous material handling operations sean all operations other than open tank and surface coating operations involving the use or handling of volatile or gaseous materials in other than chemical process operations These operations include spotting cleaning mixing and similar operations awe! SUTO020 |. -10- 19/33 Stay 4 1948 10 Chemical Process Operations Definition Chemical process operations mean all operations other than solid materials handling operations associated with the manufacture of specific chemical substances such as reacting riltering centrifuging distilling and other similar operations SUTO020 SUTO020 a 4, T UB iam -11- 19/33 - dad REPORT TO SECTIONAL COMMITTER CHAIRMAN SUBCOMMITTEE ON PLANS AND SCOPE At the formation of the Subcommittee on Plans and Scope a dual function to the committee In accordance with this dual function vas delegated is broken down into two main headings The first will outline industrial the report as briefly as possible the present status of other committees on ventilation which have been set up in outside organizations The second section is the considerations of the Subcommittee on the scope of the Sec- tional Committee with recommendations for future planning I. Status of other committees i Committee on Industrial Ventilation Americanolic Americanolic Americanolic Health Association - This committee is still in an indeterminate stage awaiting action by other similar committees The chairman of the committee to date does not know what if any function this committee can or should serve He feels tentatively that this committee should be dissolved but at the same time is of the opinion that if such a recommendation is made to his parent organization that he will be relieved or chairmanship to carry on and some Because one of other view of this attitude would be appointed the committee remains in a state of suspended animation industrial 3. Technical Advisory Committee on Industrial Ventilation to the Research Committee of the American Society of Heating and Tentilating Engineers - This committee is still in a formative stage It has been designated to bring before the mem- Ventilating bers of the American Society of Heating and Engineers the latest information on those problems within its scope and to recommend to the Research Committee neces- research in the field Also to advise the Guide Publi- sary cations Committee on revisions of the Guide The scope has been defined as follows To obtain correlate and develop for A.S.E.V.E. members and particularly for those associated practicable with industry reliable useful and information on the control by ventilation or atmospheres to meet the requirements of health comfort safety production materials recovery and atmospheric vaste disposal with the term ventilation to include the processes of supplying or removing air to or from any industrial space or operations such change of air being either natural or mechanical and the air may be conditioned Subcommittees have been set up within the committee on the following subjects 2, Subcommittee on dust collectors to prepare a complete text 2 Subcommittee to rewrite chapter 46 Industrial exnausts of the guide SUTO020 =j7 0... 0 -12- 19/33 - Ped 3. Subcommittee to formulate research on oibliographic material 4. Subcommittee to designate further fields of action All subcommittee reports expected by June 20 Manual Committee on Industrial Ventilation American Conference of Industrial Hygienists > This committee has to date accomplished The chairman of the committee for the past year pro- nothing of the committee and that the American posed the deactivation board composed Conference take the lead in proposing a strategy of policy level people from all interested groups to allocate function to each group for the prevention of overlapping and The report of this committee was turned down on duplication have held the function for many years the basis that other groups their members to warrant and to date have sufficient importance to immediate action The feeling within the organization was that the American Conference can more quickly secure the information feel essential if their committee puts in the necessery work they the value of outside repre- to turn it out Although they admit sentation they prefer to publish unpolished material and let shoot holes in it The first job which they other organizations intends tackle is a Good Practice HI Scao ndp Plae ns The formation of this sectional committee in ASA is 1 Limitations and felt to limit its function to the review compilation acceptance as standard existing data on design operationtahnedreof saintenance of local exhaust systems and all components 3. Scope 1 Data to be included S. Jomenclature b Definition8 zs, Specifications 1. Design procedures 9 Test procedures *, Maintenance schedules 3 Design calculation rigures for components 1 Design fundamentals 1 Air quantity and velocity data to satisfy control requirements 2. System components to be covered a Exhaust hoods . b Piping and elements . Tans and blowers d Collection equipment > a. Entire system SUTO020 -13- 59/33 C. C. Revise rewrite and expand 29 and add da ta to supplement Z9 covering individual Prepare as this material becomes availabl~ This is to processes direct subcommittee assignment accord- be accomplished by the sectional committee ing to functions laid down either by or the subcommittee on plans and scope signed V.B. Harris 1. Eisenbud 08 ABC 3. Warren Buffalo Forge Buffalo I.I. 1. Morse Chief Div of Ind Hygiene Chicago linois | - AMERICAN x ASA STANDARDS ASSOCIATION INCORPORATED 70 East Forty Street New York 17 N. Y t we MINUTES NOT 237/239 PUBLICATION EXECUTIVE COMMITTEI ASA COMM ON MI AXIT MUMT ALLE OWAE BLE ENTRAT OF I TOXO IC N DOSS TS AND GASES 237 May 11 1949 Subject to Confirmation . > The meeting was called to order by the chairman at 10:15 a.n. in Boom 2946 of the Grand Central Terminal Building 70 East70 East 45th Street New The chairman recalled that this Executive Committee had been mit es as the result of the action taken at the December 9 1947 appointed the work of the 237 Com- meetingmeeting of the full 237 C mittesto expedite mittes between full committee meetings This committee was empowered handle minor details but did not have the responsibility or authority adopt or reject standarda Review of Work in Progress Styrene Monomer The chairman recalled that in accordance 1. indicated with the vote at the December 9 1947 meeting of the full committee the American War Standard on Styrene Monomer had been submitted to letter ballot of the full committee with the recommendation that it be reapproved as a regular American Standard The talley of that ballot had that 5 members of the committee had cast negative votes 3 had asked to be recorded as not voting and 1 ballot had not been returned At the suggestion of the chairman the secretary read the reasons given for the negative votes and the not voting ballota The objections had been based on the belief that either the MAC had been set too high or that there was a lack of clinical data to indicate the safe limits of styrene Dr. Neal in casting his negative vote had suggested that this standard should remain ae a temporary standard until more detailed information was available on SUTO020 LJ ae -2- 237/239237/239 me belived there were two courses of action open -- one The chairman Neal that this standard should be was to follow the recommendation of Dr. standard until conclusive data vas available carried as a temporary since there had been the other to reopen the case with the thought that no consensus on 400 ppm perhaps the committee might agree on a lower con- centration Dr. Kehoe believed that since no additional information of a clinical nature had been made available to assist this committee in arriv- ing at a decision for practical reacons it might be desirable to issue this as a temporary standard In the discussion which followed it was indicated that no conclusive information was available that a lower concentration was desirable it was further believed that in cases where no scientific data was available to indicate safe limito it was far more desirable to issue a tentative standard giving the latest and best information available on the subject which would at least be a benchmark to aid those who were using the substance rather than fail to issue a standard because of lack of complete information Upon motion duly made and seconded it was VOTED that the American War Standard on styrene monomer be submitted to letter ballot of the full 237 committee with the recommendation from the Executive Committee that it be approved as a tentative standard the ballot to be prefaced with the reasons for this recommendation the had was 2 Arsenic The chairman recalled that it had been voted at last meeting to withdraw this war standard and this had been done It also been agreed that a subcommittee should be appointed to see if there a need for a standard on arsenic and if so to prepare a dra^fit The chairman advised that he would appoint such a subcommittee Aal Mr. Drinker asked if AsH3 would be given consideration by this subcommittee The chairman recalled that the war standard had not included and doubted if it would regularly come up under the considerations of subcommittee He questioned if this substance was used enough to warrant the establishment of a standard Mr. Drinker stated that this substance was of to metal refiners It was his opinion that As3 was of greater iimnpdoursttarnicael concern than A"203 Dr. Schrenk remarked that probably the maxi- mum allowable concentration of As3 should be 0. Mr. Drinker was of the that certain electrolithic refineries were encountering concentrations opinion believed that standards for both of AaH considerably above 0.05 ppm He Asli3 and As203 should be made available He reported that chronic arsene poisoning had been alleged but not at a concentration of 0.05 ppm 3. Carbon Tetrachloride The chairman recalled that at the last meeting it had been reported that insufficient information was available to prepare a standard on this substance and that Dr. Irish had been carrying on advisable to avait his findings extensive experimental work and it was deemed a, SUTO020| -3- 237/239 had spoken He to Dr. Irish recently and had been advised that the work had now been completed and the conclusions would_shortly be made available Dr. Irish had indicated that it would be rather difficult to make any one specific standard that vould cover the complete picture The chairman believed that one of the difficulties of the carbon tetrachloride subcom- mittee had been that they were trying to specify a standard based on homogeneous data whereas the use of this substance resulted in hetrogeneous situations The stalemate on this substance had been between Mr. Bowditch's belief that 50 ppm should be the limit and Mr. Low's contention that 100 ppa was safe There had been a special meeting on the subject to try to reconcile these differences and a compromise of 75 ppm had been suggested without any result Dr. Drinker believed this stalemate would be irreconcilable as long as the scientific approach was used rather than the c sense coo Dr. Kehoe believed that a double standard vas necessary -- one for comfort and one for disease In the discussion which followed it was pointed out that it was very important that this committee set a MAC on carbon tetrachloride since it vas a mubstance videly used and affected so many people It was agreed that this subcommittee should be reactivated and presented with the facts available and pretp o parer pae re a standard 4. Welding Fumes The chairman recalled that Dr. Drinker had been appointed chairman of a subcommittee to prepare a draft on welding fumes At the time it had been thought that as the result of a study dependent on the subject which was being prepared by the U.S. Public Health Service information might be available to prepare such a standard Dr. Drinker reported that it would be impractical to prepare a standard on the composite velding fumes but instead it would be necessary to prepare standards on the various components of the welding fumes Actually upon the materials being welded the fumes would differ If structural steel vas being welded with uncoated rods one concentration of composite fumes night be acceptable whereas in another situation where coated rods used or where welding was being done on special steels or the substance were might be harmful had been plated or coated a much lower concentration composite If the 237 Committee were to develop a single value for the velding fumes would be a tendency for users to use this single figure without giving proper consideration to changes which might be made in the of the rods or other factors which would materially affect the coating statement to what the After further discussion it was agreed that Dr. Drinker would a statement toindicate individual components of welding fumes might do This statement would be submitted to the full committee for approval after which it would be available for use by all concerned with this subject The secretary was requested to send Dr. Drinker a resume of the discussion at this meeting to help him in preparing this statement 5. Fluorine and Fluorides The chairman recalled that at the last meeting it had been reported that good work was going on but no results had been available to prepare a standard on fluorine and fluorides Dr. Kehoe remarked that there was nothing new to report on this subject ~ The chairman commented that at his own suggestion Dr. Frary was being replaced on the subcommittee by Dr. Dudley Irwin ee) ISUTO020 4. 239 6. Hitroparaffins Dr. reported that pressure of business felt that standards could be drawn Kehoe as chairman of the subcommittee had prevented work on this subject He up ^fincertain ones while others should be kept until more thorough investigations could be made Nitromethane could be done rather promptly and he believed that a draft on this could be available in a month or so 7. Clohexane Cyclohexanol Cyclohexanone Dr. Kehoe as chairman of the subcommittee reported that there had been animal experi- mentation on these substances but not otherwise and he therefore believed that it was not possible to set a final standard under the circumstances Dr. Greenburg believed the 237 Committee was open to criticism when they failed to set standards for substances for which complete experimentation had not been made He believed that if they came out with tentative atand- ards and indicated that they were based on animal experimentation only and that this was the best information available at the moment while such stand- ards might be open to criticism they would still be helpful and everybody would be in a better position The chairman believed that the drafting subcommittee should be free to write in such limitations to standards and such were make discussion as was considered advisable He also believed that they not fulfilling their obligation unless they adopted some procedure to available for use the data that was available He recalled that other groups issued tentative standards which might remain tentative for ten years during which time they were used and records kept of the and shortcomings until such time as sufficient information five or problems was available to prepare permanent standards on the subject Mr. Stratton suggested that the real value of a tentative standard would come from a statement in the standard which would indicate what information and types of research had been available on which to base the tentative standard Dr. Kehoe believed that this committee should prepare tentative standards in such instances where complete information was not available but that these standards should clearly indicate in the first sentence that it vas a tentative standard so that anyone wishing to use it could realize that it was merely a suggestion of what was feasible Mr. Bloomfield agreed that this would be sound procedure Dr. Kehoe stated that he would go over these substances with Mr. Crillon and would prepare a wording on any of these related substances where sufficient information was now available It was agrend that these statements prepared by Dr. Kehoe would be circulated for comment and criticism to the 237 Committee 8. Radium and Radon Gas The chairman recalled that at the last - meeting Dr. Greenburg had been authorized to expand his subcommittee to include Dr. Karl Morgan Dr. James H. Sterner and Dr. Bale Dr. Greenburg reported that a final draft on this subject was in preparation and would be ready in a month or so He agreed to send this draft to the secretary so that it might be circulated to the full 237 Committee for study before the . next meeting SUT0020| -5- 237/239 x of the 9. Silica Dr. Greenburg suggested that Dr. Lanza ea chairman subcommittee on Silica was probably to submit a statement statement statement to the 237 Committee The chairman agreed to ask Dr. Lanza for his r port 10 Cadmium The secretary recalled that at the last -* ing of the 237 Committee it had been agri that cadmium atould atould be with &7 a var standard and published as a tentative standard but no offici ... OT had yet been taken pending a decision of how tentative standards -1': 3 handled As soon as this had been settled the secretary would ini .. * the necessary actions New Subcommittees 11. Chlorine Mr. Stratton as chairman of the sube - reported that a draft had been prepared and vas being sent to the mea,, ~ ... of the subcommittee He believed this would be available for circula to the full committee in about 2 weeks sulphur 12. centrations of Dioxide Because of the present interest in con- dioxide particularly view of the deaths in Donora Pennsylvania from smog it was agreed that the chairman woult appoint a subcommittee to study this substance It was suggested that Drs Nachle Schrenk and Kehoe might have an interest in this subcommitt be 13. Scope The chairman alled that the editorial committer had been asked to prepare a statement to expand the scope of the 237 Committee This request had come about due to a request from the Texti Safety Code Li for information on humidity dust and temperature Dr. McCord had also suggested that there might be a future need for maximum e tcentrations of ultra vibrations Dr. Schrenk reported that he and Dr. Hoal as the editorial committee had corresponded on the vorting of ar expanded scope and they had agreed to the following ASA Committee on standards for the prevention and control of atmospheric conditions in industry which adversely affected the health or well being of employees It was suggested that the slope might state that this committee and vaa concerned with concentration limits of chemical physical atmosphere Dr. McCord suggested that in Dr. Schrenk's statement the word should be replaced by environment Dr. Keloe believed that if vas to be markedly expanded then the personnel of the committee have to be reviewed and many additional members vould have to be agents the scopwould added in arder to provide technical competence on the new items inclui i in the scope The chairman recalled that under the present scope the committee vas dealing with a large number of compounds The 237 committes did not include all of the experts on each compound but merely had establis a subcommittee of technical experts on each substance as it was considered considered Dr. Greenburg believed that this same general method of operation would still be applicable to the 237 Comittee even with the expanded scope as contemplated -6- 237/239 In an attempt to incorporate the new ideas now being considered the secretary suggested the following wording for into the present scope the allowable concentration the scope To determine establish and promote limits of chemical physical and biological agents and other subjects related to the allowable concentration limits of such substances in the environment of working places from the viewpoint of the health and well of the workmen It was agreed that Dr. Schrenk would discuss this being with Dr. Neal in light of the discussion at this meeting problem further for circulation to this Executive and that he would prepare a statement Committee for further study 14. New Substances Mr. Bloomfield as committee on new substances reported as follows chairman of the sub- REPORT OF THE SUBCOMMITTEE ON NEW SUBSTANCES OF THE 237 COMMITTER ASA Your Subcommittee was appointed at the last meeting of the main comittee which took place December 9 1947. This committee has never held a meeting but has conducted its work entirely through correspondence On June 3 1948 your chairman circularized the committee to obtain from the members as to what new substances might be recommended suggestions of new standards In this letter to the main committee for development as standards seven substances vere listed as possibilities for consideration Your chairman received comments on his original letter from all but one member of the committee As a result of this exchange of letters the following substances are hereby presented as possible material for the development of standards Sulphur dioxide Selenium Chlorine Hydrogen cyanide Dilsobutyl ketone Methyl isobutyl ketone Dichloromethane Ammonia Methyl bromide Pentachlorophenol Beryllium Sulphuric Acid Attached hereto is a list of threshold values adopted by the American Conference of Governmental Industrial Hygienists in 1948. These sam~ values vere adopted in 1949. However the Committee of the Conference has value of 0.2 milligram per cubic meter of air for dinitro- suggested a with this substance It has also cresol on the basis of plant experience threshold limit value has suggested a list of 12 substances for which no of sub- been established Among these is ketone One of the members our has indicated that ketone need not be considered at this time committee item in general commercial since it is used in only one plant and is not channels The Conference Committee also prepared a list of 20 substances been suggested by various Con- for which lower threshold limit values have ference members A copy of this material from the Conference is also attached hereto * Appendix A Attached a% Appendix B Attached SUTO020| -7- 237/239 In the course of correspondence among Committee members several other points were raised at this mesting One is fixed standards we give which it is believed should be given consideration the suggestion brought forth that instead of having consideration to having zones or ranges of toxic limits in which certain substances would fall You will recall that recently Drinker and Cook published a paper in which this auggestion was discussed Another thought thrown sht several members of our subcommittee deals with developing standard the possibility of practices rather than standards alone For example the procedures in patch testing of the skin represent a great need for some industrial hygienists No two persons are likely to follow the same steps as to the time location quantity readings and so forth in connection with patch testing In other words what is a standard patch test And finally we have the question of necessity to review our present lead standard so as to provide for less stringent limits for such lead compounds as galena One of the members of our subcommittee carried on a rather extensive correspondence on this topic and received almost as many divergent suggestions as there are lead compounds pondence are also attached to this report * Copies of this corres- The chairman asked Mr. Bloomfield if the American Conference of Governmental Industrial Hygienists supply Z37 Committee with information as to what basis they had,u^ ^dhad,u^ ^id n mrriving at their present standards Mr. Bloomfield agreed that this could be done He further recomsended that it might be to the best interest of all concerned if the 237 Committee determined the extent of use of some of these various substances before too much time was spent in trying to develop a maximm allowable con- centration for that substance The chairmen recalled that there had been some instances where the ACGIH had set lower MACs than those established by the He believed that this was undesirable and asked if it would obtain from the ACGIH the reasons why these values had been 237 Committee be possible to lower Dr. Schrenk reported that he had now been made chairman of this subcommittee in place of Dr. Fairhall and he agreed to look into the records of the ACGEE to see if he could obtain this information It was agreed that Mr. Bloomfield would give further study to and hia report and make an effort to indicate which of these new substances were most important therefore should be given first attention at the next meeting of the 237 Committee *** ** Zones 15. It was recalled that Mesara Drinker and Cook had recently published an article concerning zones of concentrations with the that same p^'ople _thought were now getting the concept that maximum allow- able concentration figures for each individual substance vere exact figures whereas the members setting these figures realized that these could not be exact figures and that in most instances the values set might include an error of 25 percent either way C attached SUTO020| -8- 237/239 health by Mr. he was Dr. Schrenk asked if it would be possible for the various state departments to use the zone system as had recently been suggested Drinker Mr. Bloomfield believed this would be possible though not villing to agree at the moment that the exact zones which had been suggested would be practical It was agreed that the 237 Committee should give further study to this problem Mr. Drinker asked what should be done to get started on this problem Dr. Schrenk suggested that the list prepared by the ACGIH showed MAC values for a large number of substances and that one way to get started would be to list all of these concentrations in numerical order and ses if any particular zoning became evident The secretary recalled that a general study on preferred mumbers had been made by the American Standards Association and a copy of the standard on Preferred Kumbers was given to Mr. Drinker The chairman asked Mr. Drinker to give further study to this problem and suggested that he also confer with Dr. Schrenk Dr. Keohoe and Mr. Cook in the hope that they would be able to zake a definite recommendation to the 237 Committee 16. Name of Standards It was recalled that some people in standards were the standards of the 237 Committee were trying to use the MAC as an using for actite situations it led exact mmmber Whereas this was satisfactory to mimmderstandings particularly with the problem of chronic illness Dr. Selby suggested that instead of calling these maximum allowable con- centrations they might be termed Hygienic Standards for Workrooms It vas recalled that whereas some MACs had been set in order to prevent toxic effects other now being set in accordance with either sensitory effects or in order to define comfort zones on the basis that higher concentrations would be so uncomfortable to the workmen that higher operating values would be impractical It was suggested that in the future it might be important in each standard to indicate in some way whether the standard had been set on the basis of toxic effect or comfort or what other basis It was agreed that the members would give further study to this problem 17. Work of the 29 Committee The secretary reported that the sectional committee on Exhaust Ventilation 29 had recently studied a draft of a proposed standard on Open Surface Tank Operations This draft had been prepared on the fundamental basis that different degrees of ventilation would be provided dependent upon the degree of thazards of the substance in question The substances had been placed in three zones --E those with MAC values less than 100 those between 100 and 500 and those . with a MAC value over 500 ppm As an appendix to their standard they had considered including a list of substances and showing a suggested maximum allowable concentration for these substances The Executive Committee agreed that a protest should be registered with the Safety Code Correlating Committee to the effect that the establish- ment of allowable concentrations of toxic dusts and gases was within the scope of the 237 committee and that such a list should not be in~ ludedin Committee without first either a standard or appendix developed by the 29 _ receiving the approval of that list by the 237 Committee ad -9- 237/239 a that 237 It 18. Plans for the Next Meeting was agreed that there was need for a meeting of the full Committee It vas also agreed this should be called for Wednesday June 29 at 10 a.m. The meeting was adjourned at 3:30 p.m. subject to call of the Henry G. , Secretary 237 Committee Bil: PG . c 6-1-19 SUT0020 [a eo 4 a eedaeA: e bed -_ we A APPENDIX APPENDIX HYGIENISTS CORFERENCE LIMIT VALUES ADOPTED AT APRIL 1948 OF MASTING AMERICAN MASSACHUSETTS CORFERENCE OF GOVERNMENTAL INDUSTRIAL IN BOSTON MAS ACHUSET S GASES AND VAPORS SUBSTANCE P.P.K. SUBSTANCE P.P.M. Acetaldehyde Acetic acid Acetic anhydride Acetone Acrolein : Acrylonitrile Ammonia Anylacetate AntyAlcohol AntyAlcohol Antline Benzene benzol 200 Ethyl acetate 10 Ethyl alcohol 5 Ethyl benzene 500 Ethyl bromide 0.5 Ethyl chloride 20 =Ethylene 100 Ethylene oxide 200 Ethyl ether 100 Ethyl formate 5 Ethyl silicate 0.05Formaldehyde 35 Gasolene 400 1,000 200 200 1,000 5 100 400 100 100 5 500 . 500 Bramine Butadiene Butanol Butanone Butyl acetate Butyl cellosolve - Carbon dioxide Carbon disulfide on monaxide arbon Callosolve Callosolve acstate Chlorine Chlorobutadiene Chloroform 1 Heptane 1,000 250 200 200 Hexane Hydrogen chloride Hydrogen cyanide =Hydrogen fluoride Hydrogen selenida 5,000 100 Rydrogen Iodine Isophorone 50 = Mesityl azide 200 Methanol 100 2 2% 100 Methyl acetate Methyl bromide Nethyl butanone Methyl cellosolve Methyl cellosolve acetato 4.500 * vy) 10 3 0.05 0.05 Cyclohexane Cyclobazmol Cyclohexanone alobezene clopropane propane ichlarodifluoromethane Dichloroethane . hloroethane ethylen dichloride ichloroethylene 400 100 100 400 400 1,000 100 . 75 Methyl chloride Methylcyclohexane Methylcyclohexanol Methylcyclohexanone formate Methyl Methyl butyl ketone Monochlorobenzene Monofluorotrichloromethane Mononitrotoluene Mononitrotoluene Naphtha coal tar Naphtha petroleum Nickel carbonyl 50075 1,000 5 50 50 1 1 ~_ Nitrobenzene . 100 Hitroethane oxides other than N20 2] Nitrogen 100 ty wa Nitroglycerin 100 Hitromethane 500 Nitropropane . 500 Octane 500 Ozone 1,000 Pentane f | a SUTO020 Se ee me <2e APPEDIE A SUBSTANCE Pentanone methyl propanone Phosgene Phosphine Phosphorus trichloride Propanol Propyl acetate Propyl ether Stibine Stoddard solvent Styrene monomer P.P.N. 200 1 0.05 0.5 400 200 500 0.1 500 200 SUBSTANCE - Pnof Sulfur chloride Sulfur dioxide Tetrachloroethane Tetrachloroethylene Toluene Toluidine Trichloroethylene Turpentine Vinyl chloride Xylene F.P.N. I 10 " 100 200 ? 100 100 500 200 SUBSTANCH TOXIC DUBIS FUMES AND MISTS Ng per cum 8. SUBSTANCE Ng per cua Be Antimony Arsenic Barium Cadmium Chlorodiphenyl Chromic acid and chromates as 0.5 0.5 0.5 0.1 1 Mercury Pentachloronaphthalene Pentachlorophenol Phosphorus yellow Phosphorus pentachloride Phosphorus pentasulfide Cyanide as C Dinitrotoluene Fluoride Iron oxide fume Lead Magnesium oxide fune Manganese 0.1 5 1.5 2.5 Selenium as Se Bulfuric acid Tellurium 15 0.15 15 6 Tetryl Trichloronaphthalene Trinitrotoluene Zince oxide fu MINERAL DOSTS 0.1 0.5 100.5 0.1 I 1 ' 001 1.0 0.1 1.5 5 1.5 15 15 BUBSTANCE M.P.P.C.F. SUBSTANCE . M.P.P.C.F. Alundum 8088888 Asbestos 8088888 Carborundu 8088888 Dust misance no free silica Mica below % free silica 8088888 8088888 8088888 81lica high above 50 free 8102 medium 5 to 50 free 102 low below '% free 8102 Slate below % free 8102 Soapstone below % free 8102 Total dust below % free 8102 RADIATIONS + eo. 55 20 50 50 20 50 MATERIAL OR RADIATION , Energy 0.1 MATERIAL OR RADIATION Energy Thoron curies per cubic meter 10-8 cubic Radon curies per noter 1058 ray roentgen per day 0.1 SUT0020 eas, ase! A ween er een I NEW THRESHOLD LIMIT VALU APPENDIX B dinitro A value for dinitro of 0.2 milligram per cubic meter of air has been suggested on the basis of plant experience with this substance II PROPOSED HIV SUBSTFA ORNWHCICE H NSO ' THRESHOLD LIMIT VALOK HAS BEEN ESTABLISHED Asphalt fumes and dust Beryllium DDD DOT Ethylene glycol Diethylene glycol Dipropylene glycol Ketene Monochloromonobrosomethane Pentachlorophenol Propylene glycol Triethylene glycol III SUBFS OR WT HICHA LOWK ER THE RESHS OLD LIMIT VALUES HAVE BEEN SUGGESTED BY THE CONFERENCE MEMBERS Acetic acid Acrolein Alcohol amyl Alcohol isonmyl Ammonia Benzene * Bromine Carbon monoxide Carbon Tetrachloride Hexavalent chromium Hydrochloric acid Naphtha petroleum Nuisance dust Ozone Radiation game Radiation ray Silica Stoddard Sulfuric solvent acid Trichloroethylene ae ln, SUTO020 (rEeE Appendix C A.S.A. 37 COMMITYMME ON NEW SUBSTANCES Manfred Bowditch to J.J. Bloomfield June 8 1948 Lead is certainly not a new substance and it may well be that ay thoughts on this subject are not appropriate for your special committee't consideration I think however that a start should be made towards substituting separate standards on some of the more common and toxicologically widely differing lead compounds for the present blanket standard of 1.5 mgn per 10 cubic meters You may perhaps wish to discuss this with Lawrence Fairhall and let me know how you think the subject might best be broached to the full committee Another item in which I am interested is the possibility of setting up some sort of standards for stippled cell counting methods I have discussed this casually with Bill Machle but nothing more Is this in your opinion a suitable subject for the 37 committes's consideration aeaewaeenwerantewwrewewereei es we www one ww ewer eww nrnweeee COMM ONETN HE T ABS OV A.G. Cranch Yours of June 11 received with excerpts from your letter of June 8 to J.J. Bloomfield . Am heartily in accord with the ideas you express in that letter Certainly I think there is enough difference in hazard in various forms in which lead is used industrially so that it would be very well to consider the advisability of separate standards for some of the more monly used forma Would be glad to see such a discussion brought up at the ASA 37 meeting . The second point you bring up is also quite pertinent as I have noted that in different locations the doctors use quite different standarda in the interpretation of stippled cell counts to say nothing of variations in technique Whether this particular point is one which is a suitable subject for discussion by 37 I am not prepared to say It seems to me . that the scope of this committee might be too limited to bring in a discussion of a standard for diagnosis based on blood examination It is concerned more with the limits of contaminants in the atmosphere and methods of their determination than with diagnostic procedures Perhaps this subject can be better approached through some other agency awaaenm ena onw e z wee w eae e ewwn w ea wwn w e w wn erw e a en e SUTO020 Appendix C -2- Philip Drinker ~ tre Thank for the two paragraphs from your recent note to you Lead's plant at Bonne Bloomfield We have a study on now at St. Joseph Lead men and I believe Terre which will I hope show what the St. Joseph is strongly and that is that the toxicity of lead sulphide as galena vienrcyonsequential compared with that when galena is roastTehdereIfoarme sIurethFienlkix Wormser feels just as strongly as I do an this point your suggestion is timely Jack Bloomfield and I have discussed the matter of variation in : toxicity of the different lead compounds and the present blanket standard for lead of 1.5 milligram per ten cubic meters of air You recall that Jack and his associated set up this stand- may PES Bull No. 205 and it was based upon exposure to the ard originally it has been widely if not ozides of lead and lead fume Since then lead I realize that the universally accepted as a basic standard of to toxicity of lead compounds varies tremendously from leaadntdetlreaaedthsyillicate galena Lead compounds such as lead phosphate galena as far more insoluble in tissue fluid and or lead frit are now recognized inert than the lead oxides and carbonate or even the sulphate therefore more Kehoe does not consider that there is this PHS Bull No. 253 However such toxic substance as lead variation in lead compounds Even with a Poisoning J.A.M.A. 85 108 1925 that tetraethyl he states Tetraethyl Lead the essential toxic agent Tevertheless it cannot be doubted that the lead is order fact in the compound lead tetraethyl In its toxicity is of the same mine magnitude as that of other well known compounds of lead Italics also Hoef states J. Lab Clin Med 6 554 1927 on ttohxeitcoixtiycivtayrioefs tleittrtaleethyl lead and inorganic lead salta its lead tetraethyl This fact indicates that from that of other and water soluble lead compounds its toxicity is a function of the lead and not of any peculiar qualities characteristic of the compound However I quote these extraordinary opinions because you may find some to the fact that lead compounds do vary in toxicity opposition feel that to use different MAC's for lead and quite apart from the above I lead to much confusion I have never felt that there or its compounds would the Lead Industries Association with the basic M vas any disagreement by involved I would a either value for lead Where galena or lead frit are exempt these from a MAC value altogether or b leave the matter to the common sense of the industrial hygienist I would who has awe With regard to the standards for stippled cell counting methoda in touch with Elston Belknap of Milwaukee Wisconsin suggest you get or more done outstanding work in this field for twenty years ewww ee ew em eee eee ee ene eeewwe ewew ew ew eee 5 SUTO020 |e i % -3- Appendix C W.J. McConnell 4 In reply to the extract of your letter to Jack Bloomfield regarding separate standards for widely differing lead compounds I fully appreciate your feelings with respect to the inconsistency of using a blanket standard for lead compounds of varying toxicities On the other hand there are so many physiological factors which doubt may cause variations in human toxic thresholds not to mention factors which may cause variations in environmental concentrations of the materials that I question whether we should place too much dependence on the security offered by called safe standards It seems to me that such standards can only be very roughly approximated Therefore the present stardard which which has been accepted might well suffice for all compounds of lead I whether more precise standards could be approximated an With respect to standards for stippled cell counting methods I believe Dr. Hamilton has suggested certain standards Here again I don't think that laboratory tests can be substituted for intelligent observation and evaluation of the worker as an individual by informed physician I don't think that blood examinations should be confined to stippling alone but a red and white cell count a notation of changes in color or morphology of the red cells and any drop in hemoglobin should be included Variations from normal lead content in the urine should also be made These laboratory data together with the clinical symptoms and signs must all be evaluated in arriving at a diagnosis and I would hesitate to emphasize any group in particular C.P. McCord June 16 In your letter of June 11 you ask me to comment on an excerpt of @ letter to Mr. Bloomfield For a long while some of us have firmly felt that by no means are all lead compounds equally dangerous due to distinct differences in solu- bility rates This was long discussed at an earlier time in ASA meetings It was then agreed that substantial differences as to prospects of lead poisoning from different compounds existed but to the majority it seemed inexpedient to make any demarcations It appears practical that the long list of ordinary lead compounds might be broken down into three zones with the first conforming to the present standard of 1.5 mg a second possibly loading to a 3 mg level and the third remotely possibly reaching as high as 6 I realize that this last figure may be anathema to some but the ng warrant may still exist for a few compounds By no means do I commit my self to any such figures Long ago William Fredrick and I set up a number of lead zones . . somewhat in line with the above statements I am suggesting that you write him for a copy of our listing Bill is so given to stringent standards that any statement from him toward liberalization to the present situation would be almost the last word in needed changes changes SUTO020' alla AppendixC As to your second point that is standards for stippling I an less enthusiastic Stipple cells in the blood in lead poisoning or othervise partly may be regarded as accident^ By means do they represent the total mumber of red cells containing basophilic material The number of stipple celle formed in lead poisoning in my opinion is a frail indes of the severity of lead poisoning or the imminence of its appearance The artificial clumping of all basophilic material in red cells basophillic aggregation test is much superior but still should be regarded chiefly as & screening procedure Regularly we make use of this procedure in group exmminations of suspects and with highly helpful results We would never rely upon this as a final criterion in diagnoses It is my thought that you should neither press the item of stipple cell standardization nor place too much emphasis on its conclusive value in diagnoses No less positive results are quite helpful along with several other items such as quantitative lead determinations in urine in an appraisal of the diagnostic situation weaewnr ew eweeweenewe ewer wr eerwwnwernrerrrreeereeeo There are two small objections to your including my recent letter in your compilation on tolerable lead exposure levels The first of these is that I do not want to appear to be working behti hen bad ck of the 2-37 committee The second is that the very figure that I mentioned for 6 few load compounds may not be regarded as an exact one and is not based on actual experience While I do believe that the standards should not be uniform for all lead compounds and should be liberalized for many I do not vant to be crediteads spon ans y exo actrhii gh n figg ure at this time If this present letter be included along with the earlier one for discussion purposes I will have no objection to the use of both awaaeemnanweew ewww ew ee eee eee eee we www ener ewww enree H.H. Schrenk With reference to your question regarding the permissible limit of lead I appreciate very definitely problems involved There are a large variety of lead compounds and the permissible limits for individual ones could vary widely It seems to me that this question might well be placed before mittes 237 again as well as before the G.I.H. Committes The question of stippled cells might also be placed before 237 because I believe that most of the people who have worked with this procedure are members of the committee and therefore the committee would be in a position to discuss the subject intelligently <~-a= eeee eo ewwe wor ow ew ww eww ee weer rrrnrrwreenrnene | iia SUT0020 8 _ . fmt A 8 Mr. Bloomfield Dr. Cranch Prof. Drinker Dr. McConnell Dr. McCord Dr. Schrenk -5- mena Appendix C June 28 1948 of June through writers The following are further comments on the subjects of my letter 30 in all received since that date As I have not cases gone the formality of asking permission to quote the names of the are omitted and their contributions to the discussion stand on their own merits ( July 2 1948 Personally I believe that if different compounds of a given element vary greatly in the magnitude of their toxic effects due consideration should be made in establishing M.A.C. values As you know we have had relatively no experience with lead sulfide here but we have had a little with lead chromate and also some with lead frit I believe that adequate studies for these substances should be made and if the results warrant a conclusion that the order of toxicity is substantially lower than that of the more soluble forms of lead higher M.A.C. values should be established for the compounds in question Actually I feel that the situation is not as serious with lead as with some of the other elements since urine analyses are a pretty the On of the hazard in case of this metal the good index of the degree other hand with compounds of cadmium beryllium chromium and possibly this additional tool is of much less value Other elements manganese warrant consideration but such as arsenic mercury and fuorides also with these urine analyses are more useful I do not feel however that we are at present in a position to establish the different M.A.C. values on the basis of purely chemical prop- such as solubility- data It would be desirable in each case to eharvteieast least two individual studies of a given substance made by different groups before considering any proposals for such changes With regard to stippled or stipple cell courts I cannot speak with much authority but there does appear to be room for improve- ment in technique and interpretation of results eee eww mew wwe ww ewe ae wee eae While I do not agree with all of Fairhall's reasoning I cannot too much with his conclusions I ses very little point in leaning disagree too heavily on statementa made by Kehoe in 1925 and 1927. Quite a bit of lead flowed out of the ladle since that time I am willing to accept SUTO020 06- Appendix C of as a major premise the fact that there are differences in the toxicity of various lead compounds Until the mechanism these differences is pretty clearly understood I would be reluctant design arbitrary standards for the different ones The simple criterion of solubility in body fluids is not I think conclusive evidence It is perfectly possible that some of these materials differ in toxicity for reasons which have nothing to do with their solubility In some instances a lead exposure involves only one single lead compound but it it certainly not uncommon to have two or more compounds involved It might be possible to establish the three zones for various compounds as suggested by Carey McCord but I question the advisability of establishing separate MAC's on the basis of our present knowledge After all if a shop can be ventilated down to a 6 mg level it is not too difficult to get the level on down to 1,5 mg For this reason I feel that it might be adivsable as Fairhall suggests to leave the matter more or less to the . common sense of the industrial hygienist Setting up separate standards would inject considerable confusion into the subject and you might be faced subsequently with the necessity of trying to change them which as you know is not angeasyy process I refuse to be drawn into the controversy on stippled Even if you have a standard method of counting them it remains a criterion for evaluating exposure while instituting a survey for more exact laboratory procedure cells poor some Of course am with you on the a I importance of makicn leg ar distinction between the allowable amount in the air of lead compounds of toxicity There was some effort to do this when the standard vas set by Committes 237 making it cover only metallic lead lead carbonate lead sulphate lead oxides lead nitrate and lead chloride But it is hard to see how an atmoshpere could become impregnated with metallic lead and a distinction should be made between the basic car- bonate and the carbonate between the basic sulphate and the sulphate Both the basic compou arn e d mos re soluble in the body fluida than the straight compounds so it would be unfair to impose the same standard Old Dutch on mines where the carbonate and sulphate occur and plants where Process white lead and sublimed white and blue lead are produced counting As to the question of standardizing the stippled cell test that is certainly desirable but of course the method must then be standardized Teleky did that I think in Germany You might ask hin The method is very simple as I remember it especially the way of rapid meee ee me ew ee ww ew ee eK ew eee rrennrreraeeeeeaeee SUTO020 " | lf {a ahi Ge -7- a Appendix C July 6 1948 Since I am constitutionally against standardization for its own sake I am sympathetic to the question you raise as to adequacy of the present MAC for all forms of lead Just as Fairhall says the figure was determined statistically for lead oxide and has been applied to other forms in- cluding some which perhaps go too far Moreover there is growing evidence in certain industries indicating that higher levels may be tolerated without practical trouble However the present figure is so well known and the objective so good that I would firming quantitative evidence now I would emphasize the need hesitate to suggest any changes without cOBSo instead of advocating changes in the MAC for such studies industry from actual experience and in the laboratory axeweeuswaeawwwwwaewwene 2ewwwrewwwrernrwwroennrenree _ Jul6y 1948 First there can be no doubt that the practical hazards of occupa- tional lead exposure vary tremendously with the chemical composition and physical state of the compound or compounds suspended in the air breathed by workmen I have never said or thought anything to the contrary It is obvious that galana suspended in the air in connection with mining operations presents a quite different problem from that of the same concentration of metallic lead and lead oxide distributed in the atmosphere of a melter foundry 1.5 . exces1s.5 mg per This wholly of is in One is substantially harmless The other in the concentration periods per 10 meters is dangerous for prolonged exposure in two years is not a question of solubility a matter of state of subdivision and shape of particle No doubt part the solubility and ) are important compound the physical factors chemical reactivity 1.e. nature of the chemical factors of the practical hazard of lead compounds also influence the matter tremendously Second when we speak of toxicity we must be sure whereof ve are speaking Toxicity in the toxicological laboratory may have meanings utterly unrelated or only indirectly related to practical hazard When I spoke correctly of the toxicity of tetraethyl lead I was talking about " the lethal properties of a material that was known to have been absorbed and about the effects upon the functions of tissues incident to the pre- sence therein of a known quantity of lead I did not undertake to say what its final form or chemical combustion in the tissues might be My purpose in the article cited was only to point out that when one administers lead chloride or lead acetate dissolved in water intravenously the mortality among experimental animals corresponds to that which results from the intravenous injection of a corresponding quantity of lead as lead tetraethyl I did not say and in fact did not discuss in this relationship the practical industrial hazards of tetraethyl lead Toxicity in relation to a call or a collection of cells in the body is one thing The potential toxicity of a material outside the body on the skin tract or even in the respiratory tubes and air cells in the alimentary is quite a different matter since any evidence of toxicity depends upon the ability of the material to gain access to the tissues From then on what happens will upon where it goes and how it is disposed of but if it does not get in it exerts no practical threat The general biologiat knows this SUTO020 -8- Appendix C unicellular and has long since pointed out that there tween the toxicity of a substance for is no necessary relationship be- unicellular organisms and that for unicellular complex forms of animal life Third there are very few sound clinical and experimental data in relation to the various compounds and subdivisions of compounds repre- sented individually or collectively in industrial environments whereby we can set tolerances I and my associates have the most precise and best correlated data available on this matter I am sure in relation to a mumber of situations but with one exception namely that of exposure to tetraethyl lead they are not qualitatively and quantitatively adequate for the purpose We regard this problem as requiring extensive investigation and we have planned a program of human experimentation along this Line comparable to our work on the ingestion of lead Until this is done by ourselves and others on a comprehensive scale in the laboratory or in industry tolerances cannot be set with much better background than now exists Fourth a standard not related to the environment but to the extent of the lead absorption could be set up with every assurance that it will stick indefinitely This cannot be done in relation to stippling or to quantitative estimates of basophilic material in the blood for these physiologic responses are not dependent primarily or solely upon lead absorption There is no point whatever in adding confusion to the existing confusion by promoting reliance upon any such procedure One will have to measure by appropriate specific analytical means the extent of the absorption of lead as shown by the lead concentration in certain body fluids When this is done no important consideration need be given to the nature of the exposure or to the compound involved Danger or the lack of it can be expressed adequately in these matters 1.e. basophilic material in the blood and lead concentration in blood urine etc. the data are available to prove my statements and therefore no serious question of fact exists Here we return to the problem of toxicity There can be from lead which very serious doubt that the extent of the risk of poisoning the body quantity which has actually been absorbed into relates to the and absorbed not to the nature of the compound to which the individual vas There exposed may be an exception to this but for the lower levels of absorption and accumulation in the body this statement can be prolongedas accepted valid with little or no doubt Thus if we were to resort to such a standard we could ignore all controversial and confusing matters related to the toxicity solubility state of subdivision of the several industrial lead compounds and devote our attention to the maintenance of safe conditions for the met Finally I do not believe it is either practical or necessary to undertake at this time to set standards with respect to maximm allowable concentrations of various containing industrial materials in the atmos phere of working establishments Bloomfield's standard a considerable im- over that of Duckering as promulgated by Legge is largely a pb roe vemn enc t h reasonable approximation of the general situation aIntd rteoloatleosw to certain conditions and not to others It is at once too high SUTO020 -9- Appendix C But it serves a useful purpose among the initiated and hurts the cause very little among the dogmatic and ignorant Until we are in better position to substantiate other figures we had better leave it alone We do not need a new standard of this kind nearly so much as we need performance in line with the implications and purposes of the present With reference to the suggestion of substituting separate standards for lead compounds of differing toxicity I am inclined to agree with Fairhall's and McConnell's comments Although considerable clinical and engineering data support the M.A.C. of 1.5 mg per 10 cubic meters of air in the instance of lead oxides and fumes analogous data for the less . toric compounds is not as complete or convincing Standardization of stippled cell counting technique offers a lot of room for debate I'm not in position to give an opinion as to the suitability of the 37 Committee considering this problem I would think however it might be tackled through some other agency Perhaps a thorough appraisal of existing procedures plus some developmental research is necessary Possibly a special study could be set up by hematologists or clinical pathologists ae we ewemrwewewwew we wwe wwe ew we we ww5wnmwwennwerwrewe July 13 1948 It is my feeling that there is wide variation in the toxicity of certain lead compounds and while I realize that we do not know too much about the various compounds and their degrees of toxicity we can neverthe- { lana in my opinion make a start by picking out two or three or four of the . more widely divergent compounds from the point of view of toxicity and attempt to assign levels for them based on the lmown facts I believe this subject should be explored at the earliest possible opportunity in order to delineate those parts of the field which may be segregated as to their toxic levels and in this way really get down to the nub of the question I do not delude myself into thinking that we can do a complete job but at least wa can do a partial job with the important substances . With reference to stippled cell counts I believe there is every reason for going forward into a standardization of the method materials and technique for making stippled cell counts A great deal of importance is certainly attached to such counts by a great many of the men in the field and , methods should be standardized at this time . tek -10- Appendix C ~ ee! July 14 1948 I am in sympathy with the idea that the American Standards Association should take up the subject of stipple cell counts The uniformity of procedure with standards to aim at for stipple cell evaluations would be a very real help Many physicians would be glad of authentic help on this question In Boston we have been troubled by a reputable commercial laboratory's announcement that its head physician will go into court and testify that one stipple cell makes a diagnosis of lead poisoning Obviously this can lead to very serious trouble I quite agree that one MAC will not cover all compounds and cer- tainly those for galena and lead silicate should be revised upwards To fati o l do so in light of the evidence from the gaml inee s wn oulda be to ignore definitive evidence _ As to Fairhall's comments on Kehoe's statement the point at issue is the interpretation of the word toxicity From the practical point of view no one believes that all compounds are equally likely to produce poisoning waaweeeea we wee e e ew wwe nm n ewerw nr we eete enw rnne rrr w ere eerw rs We are at the moment going over a paper which we have practi- cally completed on our past experience with regard to development of lead intoxication and its relation to lead urine analyses We are reporting on 406 cases of exposed workers whom we have observed over the last five or six years to more or less substantiate our opinion that present MAC's are too low In this group 64 men or 16.3 developed lead intoxication and many of these maintained lead excretion rates in excess of 400 micrograms per liter for long periods before intoxication occurred and there were many men outside of this group who had high excretion rates over long periods of te time time without ever developing intoxication As to standards for stippling it is my feeling that if such a situation could be accomplished it should be of great value I am not unmindful of the various opinions regarding the value of the stipple count yet no one would dare to disregard its significance I like the way McConnell answered this part of your inquiry -11- Appendix C July 23 1948 4 of I think that it is clear to most us that maximum allowable concentration values will eventually have to be established on the basis of molecular configuration rather than the elemental state This is already being practiced widely in respect to organic compounds but for some strange reason has not been applied in any appreciable extent to those compounds ron- taining basically inorganic elements such as lead fluorine and arsenic Certainly the toxicity of arsenic varies widely with compound formation Li its toxicity in arsene is vastly different than its toxicity in mapharsen Those of us who have done animal work on lead compounds know that here too the nature of variation can there is a tremendous variation in toxicity depending upon the compound In the inorganic series of compounds the usually be referred in qualitative fashion to the solubility of the compound the toxicity decreasing with the solubility Practical field experience in controlling lead exposures has clearly demonstrated the difficulties associated with the use of maximum allowable concentrations based or atmospheric values alone Many lead operations are intermittent in character and the establishment of weighted means of exposure is virtually impossible Practical field experience has also clearly indicated that blood abnormalities cannot be used as criteria of excessive lead absorption since every blood test which I know of is likely to become negative in case of prolonged exposure to excessive levels of lead On the other hand estimating absorption rate by urinary excretion values atmospheric particularly when applied to a group of workers has proven to be very reliable and valuable Although we continue to take the ordinary samples around lead using operations for the past four or five years we have usually based our exposure evaluation upon the urinary lead content We are using the worker as a sample collecting device Interpretation of urinary values is usually made on the average of a group of similarly exposed workers since there may be considerable variation among individuals from day to day even though the exposure level remains the sama Urinary excretion rate criteria automatically compensate for variations in solubility rates of the several lead compounds I feel that a supplementary maximum allowable concentration value should be established based upon urinary excretion rate and fixed in the neighborhood of 0.15 mg per liter value You refer in your letter to a list of limit values for lead compounds which we set up here a number of years ago These were a portion of a proposed regulation for the protection of workers exposed to lead and its compounds It is quite detailed and extensive This regulation has never been put into effect as written but it does incorporate the basic principle of recognizing differences in the action of lead compounds The lead compounds were divided into three classes 1 2 and 3 The maximum allowable concentrations were 0.15 0.3 an~-0.45 mgs per M respectively Class 1 included such soluble compounds as lead acetate lead nitrate lead formate and lead tetraethyl Class 2 included such compounds -~i2- , AppendixC conservative lead metal the several oxides of lead lead carbonate and lead chromate us Clasa`3 contained the very sparingly soluble compounds such as lead sulfide lead silicate lead titanate and lead tartrat^' In the light of accumulated of .45 mg per 1 M3 experience I am inclined to believe that the limit value for class 3 compounds is unnecessarily SUT0020 , farz farz phe& AMERICAN STANDARDS NOTIC NOTIC NOTIC 7 ASSOCIATIO ASSOCIATIO 70 East Forty 6" Street New York 17 N - wee CS 241 November 15 1950 Personnel or ASA Sectional Committee on SAFETY CODE FOR EXHAUST SYSTEMS 29 Sponsors American Industrial Hygiene American Society of Heating Engineers National Association of Fan Association and Ventilating Manufacturers Scope Standards for the design of equipment to provide a operation and maintenance safe atmosphere by remov- ing harmful substances from their point of produc- tion or issuance and by safely disposing of such substances and such supplementary standards on personal protection as may be necessary prescribe methods for the protection MATIC MATIC Chairman Theodore P. Hatch MATIC Secretary MATIC . Organization Aff MATIC Represented -- -- ---- Aff MATIC MATIC Nation Classification American Conference Division of Governmental Industria Governmental Hygienists OR Chief D Division of Industrial Hygiene Illinois Dept of Public Health 1800 West Fillmore Street Chicago 12 Illinois OR American OR Foundrymen's S.C. Massari Technical Director 3 Sobiety American Foundrymen's Society 222 West Adams Street Chicago 6 Illinois American Industrial Theodore F. Hatch 4 Hygiene Associa- tion University of Pittsburgh Graduate School of Public Health Pittsburgh 13 Pa alternate . Allen D. Ind.Hyg.Engr Medical Department Bethlehem Steel Corp. Bethlehem 7a American Public Allen D. Brandt Ind Hyg Engr 3 Health Association Medical Department Sethlehem Steel Corp. Bethlehem Pa SUTO020 -20 CS 241 November 15 1950 we Organization Represented American Electro- platers Society Liaison Name and Business Affiliation Classification E.R. Bowerman Sylvania Electric Products Physics Laboratory Box 6 Bayside L.I. N.Y. Inc alternate M.B. Diggin Hansom Munning Mattawan New Jersey Co. American Society of William M. Wallace II 3 Heating and Ventilating Consulting Engineer 126 East Parrish Street Engineers Durham N.C. alternate H.E. Ziel Albert Kahn Associated Architects & Engineers New Center Building Detroit 2 Michigan Inc. American Society of Mechanical Engineers Arthur C. Stern Division of Industrial Hygiene N.Y. Department of Labor 30 Center Street New York N.Y. American Society of William F. Weber Hazards Engr E Safety Engineers Western Electric Co. 100 Central Avenue Kearny New Jersey Association of Reuel C. Stratton Supervising bad Casualty and Surety Companies Accident Preven- Chemical Engineer Engineering and Inspection The Travelers Insurance Co Div tion Department Hartford 15 Conn Dust Control Equipment Association John M. Kane American Air Filter Louisville 8 KY Co. Inc. alternate 3.S. Parsons President Parsons Engineering Co. 2545 East 79 Street Cleveland Ohio SUTO020 y [ 15 7 T [ J 57 ) -3- > we JS 241 November 15 1950 Organization Represented Federal Security Agency Public Health Service Name and Business Affiliation Classification Charles D. Yaffe 3 Acting Chief Field Headquarters Division of Industrial Hygiene Federal Security Agency Public Health Service 1014 Broadway Cincinnati 2 Ohio alternate Ronald E. Bales Division and Address 18 above Foundry Equipment 1.0 Vedder Manager Dust A Manufacturers Control Department Association Pangborn Corporation Hagerstown Maryland alternate P.C. Morey Parsons Engineering 2545 East 79 Street Cleveland Ohio Corp. International O.G. Stam Ind Hygienist 3 Acetylene Associa- Industrial Toxicology Department tion Bakelite Corporation Bloomfield New Jersey alternate International Association or Governmental Labor Officials Dr. A.G. Cranch Industrial Toxicologist Union Carbide & Carbon Corp. 30 East 42 Street New York N.Y. Arthur A. Farrell w N.Y. Department of Labor Div of Industrial Safety Service Empire State Building New York 1 N.Y. alternate Frederick Weber Div or Ind Safety Service Empire State Building New York 1 N.Y. ls Manufacturing H.L. Miner Manager Chemists Associa- Safety & Fire Prevention Division tion of the U.S. E.I. duPont Nemours & Co. Inc. 5019 duPont Building Wilmington Del vA en SUTO020 a ~+= CS 241 November 15 1950 Organization Represented National Associa- tion of Pan Manufacturers Name and Business Affiliation Classification A H.M. Fisher Westinghouse Electric Corp. Sturtevant Division Hyde ark Boston 6 Mass alternate E. Szekely Bayley Blower Co. Milwaukee Wisconsin National Associa- C.R. Williams Chief ? tion of Mutual Industrial Hygienist Casualty Companies Liberty Mutual Insurance Co. Loss Prevention Department 175 Berkeley Street Boston 17 Mass alternate National Electrical Manufacturers Association alternate) National Foundry Association National Paint Varnish and Lacquer Association Inc. J.C. Stennett Director Accident & Fire Preven- tion Division National Association of Mutual Casualty Companies 91 Michigan Avenue Chicago 11 Illinois 3.W. Monroe 3 7.0 Box 2025 Buffalo 5 New York m S. Finch Ge ral Electric Co. Schenectady Schenectady 5 New York L.E. Roark Exec Vice Pres 3 National Foundry Association 120 La Salle Street South Chicago 3 Illinois E.E. Hoffman Director 3 Industrial Finishers Division National Paint Varnish & Lacquer Association Inc 1500 Rhode Island Avenue N.W. Washington 5 D.C. Te entr SUTO020 Loi ! -- - Stand 03 241 November 15 1950 Organization Name and Business ' Affiliation Classification H Represented National Safety Council William Witheridge 3 Ventilation Consultant Research Laboratory Division General Motors Corp. P.O. Box 188 North End Station Detroit 2 Michigan alternate) William F. O'Connor Department of Chemistry Fordham University New York 98 N.Y. 7.S. Department of Hylton R. Brown Senior Engr Ad Interior Bureau Eastern Experiment Station or Mines J.S. Bureau of Mines College Park Maryland alternate H.B. Humphrey Mining Bureau of Mines New Interior Building Hashington 25 D.C. Engr J.S. Department of William G. Griffin 93 Labor Bureau Bureau of Labor Standards of Labor Standards Washington 25 D.C. alternate) R.P. Blake Bureau of Labor Standards Washington 25 D.C. U.S. Navy Department Bureau of Ships 3 Bureau of Ships Navy Department Washington 25 D.C. Members Leslie Silverman Asst Prof of Industrial Hygiene School of Public Health Harvard University 55 Shattuck Street 3cston 15 Mass Dr. Leonard Greenburg 3 Executive Director Div of Industrial Hygiene N.Y. Department of Labor 30 Center Street New York ) 7 i SUTO020' re 15 PHG JS 241 November 15 1950 CLASSIFICATION IMOAMM Manufacturers IMOAMIMOAMM Employers 1000 Employees Governmental Bodies IMOAMM Independent Specialists IMOAMM Insurance Representatives Total 25 ae SUTO020 fr Lf oy - bud Y el pr | t ( 57 57 ) \ tie4 . land ST AMERICAN S ASSOCIATION ame. sem 70 East Forty Street New York 17 N. ASA f wi EY Se i^' , lee 29/59 le ~n PRIVATE COMMITTEE DOCUMENT A NOT FOR PUBLICATION AOL MINUTES OT Nee ASA SECTIONAL COMMITTEE ON SAFETY CODE heey FOR EXHAUST SYSTEMS 2g a nn 6 608k April 27 1951 oom wee dee Subject to Confirmation A meeting of the Sectional Committee on Safety Code Systems 29 was called to order by Mr. in Room 2946 of the ASA offices ON ON ON ON Chairman for Exhaust at 10 a.m. Hatch T.F. Chairman Bowerman E.R. Brandt Allen D. Brown Hylton R. Stern Arthur C. Tilden P.V. OR OR W.G. Griffin OR Weber W.F. OR Taffe C.D. OR \ OONN ON ACT American Industrial Hygiene Asen American Electroplaters Society ACT American Public Health Asen ACT U.S. Bureau of Mines ACT ACT 5 American Society of Mechanical Bureau of Labor Standards Engineers American Society of Safety Engineers U.S. Public Health Service A3A Staff Lamb Henry G. Acting Secretary 1. Subcommittee on Solid Materials Handling The chairman re- ported that Mr. John Kane to attend this meeting but chairman of this subcommittee had been had talked with him about a month ago unable Mr. Kane was having some difficulty in arranging the facts and information available in accordance with the general setup which had been agreed upon for these standards It had been hoped that one standard could be de- veloped for all solid materials handling but Mr. Kane had found such differ- ences between the handling of grain and the handling of foundry materials that he had questioned if all of these substances could be included in a single standard Mr. Stern suggested that Mr. Kane be requested to develop a draft for the foundry operations and a separate draft for grain handling Ze suggested that perhaps after these drafts had been prepared certain similarities might become evident whereby in the future it might be possible to pick out the common characteristics in order to develop a single standard for materials handling operations He realized that in addition to the common characteristics there might be some special characteristics with re- gard to one or more of the particular industries which would require individ- tal consideration SUTO020 | | r ; -2- , i i 59/59 ' April 27 1951 Mr. Brown recalled that ventilation problems in grain caniling caniling included some elements which were not present 27 OTT OF Lr 143tries probably simply act as storage agente for grain which Many elevator operators Rust do not own When grain is received entilation to take ! applied before the grain 13 weighed the elevator operatora wild terested in having a maximum of ventilation in the thought than also entrap some grain Weighmasters Association This had been such a problem in the had now put in strict rules that the ventilation before weighing is under the control of the welgnmaster After the grain has been weigned the elevator operators want to apply as little ventilation as possible both to prevent entrapment of grain and also to prevent excess drying of the grain After storage the elevator operatora have which would retube 153 weight to return or ship out the same weight of grain that they received The chairman suggested that grain handling operations they could dust with comparatively small volume if hoods were properly placed in provide effective control or the of air movement It was agreed that Mr. Kane should proceed with his subcommittee work in order that he might present the full 29 Comite Committee with traits on grain handling and foundry operations for further study 2. Subcommittee on Surface Coating Operationa The chairman re- ported that he had talked with Mr. Silverman 89 chairman of mittee Mr. Silverman had made very little progress as yet the but subcom- noped to work on it during the summer and have a report or a draft ready for distri- bution to the full 29 Committee early this fall Mr. Bowerman stated that he had been instructed by the American Electroplaters Society whom he represented to urge the the work on surface coating operations as they were much completion or needed by the electroplating industry 3. Subcommittee on Fundamentale The chairman reported that the replies received from the letter which he had sent to all members of the 29 Committee as 29/53 on December 3 had shown an overwhelming majority in favor of having the subcommittee on fundamentals continue 103 present work on a good practice manual Te also reported that many of the members al80 believed that there was a need for a document on fundamentals and that this subject should not be neglected The chairman believed that there was a real need for a statement on fundamentala with regard to ventilation work We believed that this should bodies go into and the such fundamental laws of paysirs as the entrapment of air whereby the amount of theory of faliing ventilation dcpenus upon the height of the fall and the theory of air movemente es if of radiation from a hot body It was his thought that Vokyodly * non- cerned had a real concept of these fundamentals ventilation but in the original design of buildings layout of processes would greatly reduce that many fundamental changes the amount of ventilation requared SUTO020 1 Whil +4 29/59 that perhaps the best theoretical design for ventilation would be arrange the processes and equipment that the required ventilation duced to zero and no ventilation system would be required at all to 90 was re- fr Brandt as chairman of the subcomsubcomitemsuibctomtmietteee reported that bis subcommittee had sincerely tried to make ar 3ion of the present jocu- ment on fundamentals but the more they worked on it the more it took the shape of a good practice manual He had thought that it would be possible to develop a standard on fundamentals and keep all or the other material in an appendix but the other members of the committee had not agreed with him They now had a draft nearly ready for presentation to the 29 Committee It included nine sections on such subjects as shape and design or hoods properties involved in capturing certain substances collectors inspection and maintenance of equipment This draft would not make specific reference to any particular industry as he had under- stood that the 29 Commi would develop special codes for each particu- lar industry as it was needed Mr. Taffe presented the Z9 Committee with a copy of Industrial Ventilation -- a manual of recommended practice published by the American Conference of Governmental Industrial Hygienists January 1951 The Committee appreciated this document and agreed that the copy should be kept in the ASA library for reference purposes of all parties concerned Mr. Taffe raised the question ase to how the present work of the ittee on fundamentals would relate to the work already done by the ACGIH Mr. Brandt replied that he had not yet had an opportunity to study the ACCIE code He had obtained a copy and planned to study it in detail It was his thought that the work of the subcommittee on fundazentals could be coordinated with the work already done by the ACGIB to that there should be comparatively little duplication of effort Mr. Brown Buggested that in addition to the work already done he believed that it would still be necessary to have some kind of a document on fundamentals of exhaust systems Mr. Brandt said that it had been bis experience with plant engineers that most of them were not too much concerned with fundamentals What they really wanted to know was how to solve their specific problem A few engineers had a real intellectual curiosity and wanted to do a good job out many other engineers wanted to make a decision as soon as possible and frequently called in the equipment manufacturers and leaned upon them heavily for the design of the complete installation The chairman suggested that perhaps there had been some difference of the concept by the various members of the committee as to what vas meant by the term fundamentais De was concerned about the fada- rentals of the flow of fluids in pipe and such other subjects as the persement of particles Mr. Brandt stated that he had some of these dissub- jects in the present draft Mr. Bowerman stated that as far as the clectroplating work was concerned be mew that many of the people in that industry were looking for a single document where they could find direct requirements for > 1 7 SUTO020 $ hs. te 19/59 April 27 1751 would ventilation He hoped that this include legal requirements if any the necessary information on design and such other fundamentals as might of help in the layout of equipment and the design of procesbe6 Because materials used in electroplating the ventilation prociem nad the present real interest in become a major problem in this industry and there was how the cost of this ventilation could be reduced The chairmar asked if there were a need to set up a new subcommittee on fundamentals at this time while Mr. Brandt's committee vas working on the good practice manual that no additional subcommittee on this subject subject should be agreed Iatutw ha os rized at this time with the thought that the members of the 29 Com- to review the draft which Mr. mittee should first have an opportunity Brandt's committee was now preparing Mr. Branat stated that he hoped ris subcommittee could have a draft ready for distribution by early September vouid L. New Subcommittees Ar Stern recalled that in 1948 a special subcommittee had considered various industrial operations and had submitted to the full 29 Committee as 29/31 wated April 20 1940 listing 1i troeptoarltof 10 different industrial processes which might warrant coralderation by the 29 Committee Ie recalled that four subcommittees were estaolished two or three years ago one subcommittee nad now completed 103 work and the three others vere making such progress that their work would probably be completed within the next year He suggested that this be a good time to initiate work on one or more of the other subjects men- tioned in their report with the thought that each of the aubcommittees required two or three years to complete a subject Consideration was then given to the following subjects Mechanical Cutting and Abrading Operations Abrasive Blasting Operations Rock Cutting Operations Molten Materials Handling Operations Chanical Process Operations Labor The chairman recalled that in the past consideration had been given to various subjects from two points of view -- first the apparent need for the code in question and secondly the availability of information recessary for preparing the code Mr. Tilden reported that the Bureau of Standards was developing courses of inspection for labor inspectors on various subjects He ves now developing such a course on chemical ~azar~-s work which could be one on chemical md he would therefore appreciate any onerations This course was intended to prepare inspectors in porrodceerstshat they would understand the normal chemical hazards union would be found in the average small industrial piant rather than preparing them for activity in a large chemical plant The chairman suggested that such a standard night not be too much helip in the development of this course since the standard would only be concerned with exhaust ventilation and not all of the other safety requirements for chemical operations The secretary recalled that at present there was a conflict tween the requirements of American Standard Safety Code for the Use and Protection or Abrasive Wheels 37-1-1947 and American Standard ing Polishing and Buffing Equipment Sanitation Z43-1941 He suggestel be > - ... SUTO020 ~-- t ~ Sy 4 19/59 that when any work was done on the first subject should endeavor to resolve this conflict that the subcommittee After further considerable discussion it was agreed that a zew subcommittee should be established on the subject Mechanical Cutting and Abrading Operations It was understood that this subject would include all operations involving cutting machining sanding grinding polishing buffing snagging saving or other similar operations on vood plastics rubber metal or other solid materials cut not including abrasive blasting or rock cutting It was also agreed that a new subcommittee should be established on the subject of Abrasive Blasting Operations This subject would include the process of blasting metal or other materials by means of abrasive or etallic particles for the purpose of removing sand rust scale or paint to produce certain finishes or change the physical characteristics or the aterial It was agreed that no further subcommittees on process operations be initiated at this time 5. Ventilation and Operation of Surface Tanks 29.1-1951 . Stern reported that as chairman of the auncommittee v^ ichhad developed this standard he had received a request for an interpretation with regard to 2.1.1 In the middle of this paragraph there was a sentence as follows The relative explosion hazard is measured in terms of the open flash point flash point of the substance in the tank in degrees Fahrenheit Appendix A had included the flash points of many chemicals but many of these flash points had been determined by the closed cup method rather than by open method He recalled that in both the work of his subcommittee and the work of the 29 Committee there had been a change or thinking between some of the earlier drafts and the final draft concerning the open ethod and he believed that the present standard did not truly reflect the thinking or the committee In the general discussion which followed it was explained that both open and closed cup methods were used to determine flash points and that the difference in methods might account for a difference of 5 to 10 degrees Fahrenheit in the temperature of the flash point and that this difference probably was not too important as far as the use I this standard vas concerned Upon motion by Mr. Stern seconded by Mr. Brandt it was VOTED that in any reprinting of the 29.1-1951 standard the words open and flash point be deleted in 2.1.1 so that the sentence would read The relative explosion hazard is measured in terms or the flash point of the substance in the tank in degrees Fahrenheit with the understand- ing that this should be considered an editorial correction SUTO020 4 | oj = 4 29/59 April 27 1951 the Next Meeting It was agreed that plans should 5. Plans for held some time in be made for a meeting of this sectional committee to be the that at that time drafts or reports from September with the hope to the full committee three subcommittees now active might be presented The meeting was adjourned at 1:15 p.m. 3OL PHG May 2 1951 Zenry G. Lamb Acting Secretary 29 Comittee SUTO020 baka} bana aa} AMERICAN STANDARD ASSOCIATION an INCORPORAL 70 East Forty Street New York 17 N. Y. ASA PRIVATE COMMITTEE DOCUMENT NOT FOR PUBLICATION MINUTES ale ASA SECTIONAL COMMITTEE ON ALLOWABLE CONCENTRATIONS OF TOXIC DUSTS AND GASES 237 May 18 1954 Subject to Confirmation The meeting was called to order by the Chairman Dr. Wm P. Yant at 10:10 a.m. in Rooms 2944-46 of the ATION ATION East 45 Street New York 17 N.Y. Yant Wm P. Chairman Berger L.B. alt for Present USDMIatBMh ATION ATION ATION ATION Blake R.P. for Alice Hamilton Bowditch Manfred Cook Warren A. Cranch A.G. OR Dooley Allan Drinker Philip alt for OR Gurney S.WY , Carey P. Schrenk H.H. Sehl Fred W. Smyth Henry F. Jr. Snell M.A. Stckinger H.E. Liaison Stratton Reuel C. von Oettingen W.F. Laubly C.S. American Lumbermens Mutual Casualty Low Frank S. Foot Machinery & Chemical Corp. Co. ) Math CSA MA) Math Math MatL ACSC USPHS MMaattLL Ainsworth C. ASA Staff Lamb Henry G. Secretary 237 ASA Staff Absent Bishoff F.M. Cralley Lewis Drinker Cecil K. Elkins Hervey B. Foulger John H. Greenburg Leonard Haggard H.W. DA MMaattLL IAGLO HCA ACGIH MatL Hatch T.F. Machle Willard Nelson Norton Osborn S.H. Sands F.W. Vosburgh B.L. Math Math MatL CSPHANA NSC Math ing all Since a long period of time had elapsed since the last meet- of the Z37 Sectional Committee upon suggestion of the Chairman those present introduced themselves indicating which organizations they represented SUTO020 157 78S 2 2 C 237/264 May 18 1954 that the Approval 163. of Minutes Min 145 The Secretary reported minutes of the last meeting nad been circulated as 237/244 Upon motion duly made and seconded by Mr. Gurney it was VOTED that the minutes of the June 29 1949 meeting 237/244 be approved as circulated Status of Technical Subjects under 2-7 The Chairman re- called that a Status Report of the various teconical subjects under the scope of the 237 committee had been circulated to the members Inese subjects needed review from prior to the meeting 237/263 and methods methods the standpoint of content concentration references This report 237/263 was discussed in detail as shown in Min 164 through Min 191 164. Carbon Monoxide 237.1 Min 18 Mr. Cook believed that the values already contained in the Z37.1 standard were good and should be reaffirmed He approved the idea of having two concen- trations listed one for an hour day a nigher one for a snorter period of time There was some discussion as to the wording of the clear that if an employee were exposed to standard so as to make it low concentration for a long period of time then it would be dan- a gerous to have him exposed to the higher concentration even for a fundamental question since it applied short period of time to all of the gases This was a It was generally agreed that the Editorial Comwriting the standard mittee would have to explain this situatbieonww rh ie tn ten which would say in It was suggested that a statement might effect that both concentrations could be used providing the average for the entire time interval was less than the lower concen- et xr pa ot siuorne Some of the members believed the 400 ppm value should be included with the stipulation that it be used for only a short time Others believed that time might be lost from work by allowing an em- ployee to be exposed to such a hign concentration even for so short tile a time since he could not then go into a lower concentration for remainder of his hour day Upon motion by Mr. Cook seconded by Dr. Irish it was VOTED that the Z37.1-1941 standard on Maximum Allowable Concentration of Carbon Monoxide be reaffirmed of the The Secretary explained that this vote would have letter ballot full committee and that upon approval have to be reviewed from the standpoint of style and format had changed somewhat since 1941 to go to it would which committee It was agreed that Z37.1 for comments with regard should be sent to to references and the sectional methods as snown in the text SUTO020  237/264 - 3 May 18 1954 seconded cussion 165. Hydrogen Sulfide upon motion by Mr. Cook Z37.2 Kin 20 by Dr. After a Drinker brief aisit was VOTED that the American Standard Allowable Concentration of Hydrogen Sulfide 237.2-1941 be reaffirmed after a canvass of the sectional committee for comments regarding references and methods that the 166. Carbon Disulfide 237.3 Min 21 It was pointed out American Conference of Governmental Industrial Hygienists the concentration of the American Standaru on Carbon agreed Disulfide with Disulfide Upon motion by Dr. McCord duly seconded it was VOTED that the American Standard Allowable Concentration of Carbon Disulfide 237.3 1941be reaffirmed 167. Benzene 237.4 Min 19 Mr. Cook suggested that this standard be referred to subcommittee for revision with a recommendation that an effort be made to suggest a concentration in round numbers such as 100 50 25 10 or 5. He hoped that intermediate figures be avoided in order to denote the lack of preciseness in these could figures Upon motion by Mr. Bowditch seconded by Dr. Irish it was VOTED that the American Standard Allowable tration 237.4-1941 further of Benzene mittee for be assigned to a subcomstudy and revision proposed 168 Cadmium 237,5 Min 156 The Chairman explained that there had been an American War Standard on this subject but it had | been withdrawn It was now up to the committee to decide whether or not a standard should be published for trial use and comment should be for oxides of Dr. von Oettingen suggested that the standard cadmium Dr. Drinker pointed out that although cadmium rather than for Causium he approved of the presebnrteactohnecdentrItatw ia os n ffourrthceaurmisuumggoesxtiecuesby Dr. von in itself could not be that the word fumes be used Mr. Cook suggested that the Oettingen standard for dusts of cad- - committee consider setting up a separate out the present proposed mium compounds Dr. Drinker suggested sending standard on Cadmium Oxide Fumes and later sending out another sep- arate document for straight cadmium compounas . SUTO020 57 4 . a 237/264 4 May 18 1954 was Upon motion by Mr. Cook seconded by Dr. von Oettingen it an it it was VOTED that the committee go ahead with a standard on Cadmium Oxide Fumes in the meantime that the subcommittee study the need for and possibility of a standard on Cadmium Compound Dusts Upon motion by Dr. Lanza seconded by Dr. von Oettingen VOTED that the present standard be submitted to letter ballot of the committee as a regular standard rather than as a proposal for trial use and criticism The many comments subcommittee committee believed that in this way they would which could be used as a basis for revision by receive the Hr Gurney stated that from his experience during the past few years he believed the concentration now contained in the 237.5 standard could be higher However since the standard was going out to letter ballot anyway it was generally agreed to wait until all comments had been received from the members 169 Manganese 237.6 Min 126 Dr. McCord pointed out that as with Cadmium any standard on Manganese should read Manganese Dioxide rather than as Manganese only There was some controversy to whether 40 to 50 miligrams would be a safer concentration or as whether 60 miligrams was safe as stated in the present standaru was Upon motion by Dr. Drinker seconded by Mr. Stratton it : . . VOTED that the American Standard Allowable Concentration of Manganese 237.6-1948 be reaffirmed with a change from Manganese to Manganese Dioxides 170 Chromic Acid and Chromates 237.7 Min 48 Dr. Irish asked if this standard included aichromates He stated that during the past they had had trouble with that dichromates under for chromates and the enromic present level However he believed safe He even believed that acid the level of abcoovnecentthrisatiloenvelwas of 1 mg p 10 c.m. was in actual exposure somewhat practice SUT0020 237/264 5 May 18 1954 endl Dr. Lanza read a statement from the Public Health Service which stated in effect that those exposed to chromates and dichromates dichromates in the process of manufacture come up with a susceptibility to lung cancer several times greater than the average population Since it was unknown why this situation existed Mr. Bowditch suggested including a statement in the standard that it did not include consideration of cancer and a reference to the USPHS publication Dr. McCord suggested also the exclusion of allergies from chromium from skin contact and possibly from inhalation Upon motion by Dr. Irish seconded by Dr. McCord it was VOTED that in view of the many unknown technical factors this standard be referred to a subcommittee for further study and review 171. Mercury 237.8 Min 48 The committee was in general agreement that the present concentration for Mercury was satisfactory with the possible exception of some of the newer organic compounds Upon motion by Mr. Cook seconded by Dr. von Oettingen it was . VOTED that the American Standard Allowable Concentration of Mercury 237.8-1943 be reaffirmed with the new title of Mercury and Its Inorganic Compounas 172 Arsenic and Arsine 237.9 Min 152 The Chairman explained that the American War Standard 237.9-1943 had been with- drawn because the concentration of 1.5 mg p 10 c.m. had been con- sidered too low a value 5 mg p 10 c.m. was the value now being used generally It was up to the committee to decide whether there was a need for a regular standard on arsenic and possibly arsine It was agreed that the subjects should be separate and that a standard on arsine should be developed It was pointed out by was very toxic and people were be careful of it no matter what several of those present that arsine afraid of it Therefore they would the concentration was There was some discussion on whether the standard should be on Arsenic or on Oxides of Arsenic Dr. Drinker suggested Arsenic and Its Inorganic Compounds for a title Dr. McCori reculled wat die castings caused many injuries because of the arsenic used in metal Upon motion by Dr. McCord duly seconded it was VOTED that a subcommittee explore the two items of arsenic and arsine and bring in separate reports SUTO020 \ , 5 Te a 237/264 6 May 16 1954 Dr. Drinker suggested that Mr. Hervey B. Elkins be put on the subcommittee He believed that Mr. Elkins knowledge would be that a representative of extremely valuable Mr. Low suggested should also be Oldberry Electric Chemical Company in Niagara Niagara Falls on the committee 173. Xylene 237.10 Min 129 Mr. Gurney pointed out that although the present concelnetvrealtiocnausfionrg Xyirlreinteat2i0o0n ppMmr. wa Boswditch Bowditch safe it was an uncomfortable that the committee stick to health standards He believed stuhgagteswtheedre comfort levels were known they might be added as secondary information Upon motion by Mr. Stratton seconded by Dr. Irish it was VOTED that the American Standard Allowable Concentration of Xylene 237.10-1948 be reaffirmed 174 Lead and Certain of Its Inorganic Compounds 237.11 Min 158 Mr. Bowditch as Chairman of the subcommittee on this subject reported that his subcommittee was now composed of the fol- lowing members Mr. Hervey B Elkins Dr. Jonn H. Foulger Mr. William G. Hazard Dr. Robert A. Kenoe Dr. Sherman S. Pinto and Mr. Herbert E. Stokinger The subcommittee nad now started considera- tion of possible changes in the present 237.11 either in the form of a revised single standard or the substitution of several standards for lead compounds of varying toxicity through correspondence between subcommittee members He stated that his subcommittee was open for The Chairman suggested that comments from the whole suggestions sectional committee might prove valuable and that the members might wish to refer to Minute 158 of the previous meeting for further dis- cussion on this subject Upon motion by Mr. Bowditch duly seconded it was VOTED that the report of the subcommittee be submitted the whole Z37 sectional commitree for comment which should be returned to Mr. Bowaitch 175 Toluene Toluene Z37.12 Min 79 Mr. Gurney believed that although the concentration of 200 ppm as stated in this standard - a safe level it was also an uncomfortable one As with the was standard it was decided to write the standard according to Xylene added information concerning comfort health levels with Upon motiobny Mr. Gurney seconded it was VOTED that the same subcommittee the Xylene standard should Toluene standard which was to reconsider also reconsider the SUT0020 |f7 7 " " 237/264 7 May 18 1954 q 237.13 176. Oxides of Nitrogen Min 76 Kr Stokinger remarked that the ACGIH had now differentiated between the levels of toxicity of the various oxides of Nitrogen NO2 appeared to be the worst and they had suggested a concentration of 5 ppm for it Upon motion by Dr. McCord seconded by Mr. Cook it was VOTED that the subject be referred to a sideration of Oxides of subcommittee Nitrogen 237.13 for further con- Dr. Drinker suggested that Mr. Grey from the Army Chemical Center would have a considerable amount of knowledge on this subject and might be good to have on the subcommittee 177. Methanol 237.14 Min 74 Mr. Cook approved the present concentration of 200 ppm for Methanol Mr. Gurney suggested 400 ppm based on experience with spirit duplicators and from the wood heel industry He believed 200 ppm was unnecessarily low Upon motion by Mr. Cook seconded by Dr. Irish it was VOTED that the subject of Methanol be referred to a subcommittee for review of the present knowledge of it 178. Styrene Monomer 237.15 Min 151 Dr. Irian stated that although 400 ppm was a safe concentration for styrene Monomer from the health point of view 100 ppm was more practical for comfort Mr. Low suggested the standard be sent out as a petce standard since it was widely used Upon motion by Mr. Sehl duly seconded it was VOTED that the Z37 committee process this and send it out as a regular standard including a state- ment concerning 100 ppm a comfort level _ Formaldehyde 179. Z37.16 Min 38 There was considerable discussion concerning the difference between the health and comfort levels of this concentration Mr. Berger stated that 10 ppm was uncomfortable Dr. Irish stated that ne celieved even as low as 5 ppm was uncomfortable Dr. Cranch stated that 20 ppm nad at one time been considered safe but that the comfort factor nad brought it down to 10 ppm He believed also that 5 ppm was the comfortable level Dr. McCord reported that Formaldehyde was a sensitizing agent and that certain individuals became nignly alergic to this SUTO020 <b] \ | 4 1 264 8 May 18 1954 Upon motion by VOTED Dr. Cranch seconded by Mr. wer Deeley it was that 237.16 be referred to a subcommittee with a recommendation that the 10 ppm be used with a note that stating the some people comfort level as lower and may become sensitized by it 180. Carbon Tetrachloride 237.17 Kin 150 The Chairman explained that at one time the 237 committee nad discussed tuis subject in considerable detail but notning nad been developed on it other than a statement which had been prepared and distributed to interested parties 237.17 In view of the additional informa- tion available at the present time it was up to the committee to decide what should be done Dr..Irish commented that 25 ppm was a good maximum value for carbon tetrachloride but if an average value was needed it should be dropped to 10 ppm Dr. von Oettingen said that he had been impressed by the low exposures that nad poisoned people who had been drinking alcohol Upon motion by Mr. Cook seconded by Mr. Low it was VOTED that the subject of Carbon Tetrachloride 237.17 be referred to Dr. von Oettingen's subcommittee for further study with a request that a standard be prepared on the basis of information now available 181 Methyl Chloride Z37.18 Win 122 Dr. Irish stated and it was generally agreed that the present standard was satisfactory as published in 1949. This statement was based on experience Upon motion by Dr. Irish seconded by Mr. Schrenk it was VOTED that American Standard Allowable Concentration of Methyl Chloride 237.18-1949 be reaffirmed 182. Trichloroethylene Z37.19 Min 112 It was stated that the concentration of 200 ppm was the same figure as published by the governmental group However Dr. Irian believed that the general out average of 200 ppm was close to the top level Mr. Blake pointed Mr. that some people show high susceptibility to trichloroethylene Schrenk remarked that the ACGIH had dropped their figure of 200 ppm and then had gone back to it during the past year There was definite evidence that a concentration of 100 ppm was safe A department store had sold a large quantity of a rug cleaner containing trichloroethylene and from which there had been no poisoning e 237/264 + 9 May 18 1954 y Dr. Irish reported that on continuous long exposure of animals there had been an effect on growth with concentrations not far from 200 ppm He preferred a concentration of 100 ppm Mr. Gurney believed that a MAC of 100 ppm could be maintained on vapor degreasers and that figures higner than this were an indication of poor performance Upon motion by Dr. McCord seconded by Mr. Cook it was VOTED that the Chairman should appoint a subcommittee which would consider trichloroethylene and methyl chloroform in separate reports 183. Acrylonitrile Acrylonitrile Acrylonitrile 237.20 Min 99 It was explained by the Chairman that this subject nad been considered by the committee but had been dropped because of lack of information There was a suggestion to send out the present araft for comment Mr. Cook be- . lieved that some information might be obtained from William E. McCormick of B.F. Goodrich concerning this subject Dr. von Oettingen thought it would be better to receive comments from Mr. McCornick before circulating the draft to the committee it was Upon motion by Dr. Irish seconded by Dr. von Oettingen VOTED 237.20 that the present draft on Acrylonitrile be referred to a subcommittee for further study 184. Silica Min 146 The Secretary read the letter ballot which had been sent to the committee in November 1944 and which had resulted in five negative votes Mr. Cook remarked tua since 1950 the governmental industrial hygiene people anu many other had been comparing dust exposures within the limits published groups with its effect or lack of effect upon by the governmental group His experience was that 5 20 and 50 mppef n^s a those people felt to be as close to the situation as concept which was generally out that possible with the data now available It was pointed the whereas the ASA made a change at 35 percent free tilica govern- mental group used 50 percent Mr. Cook believed that 50 percent was because there were many mineral a better figure than the 35 percent in the 35 to 38 range At 50 percent there were less dusts that were natural minerals There was considerable discussion as to what the percentage should be in different operations thMers.e Esetragnedrarddisdn'Htebeallsioevesttahtaetd coal mining operations could meet consideration to ultra that light field counting did not give proper SUTO020 237/264 10 May 18 1954 particles fine Standard on the Mr. Cook believed that if there were an American subject it would givecommittee a tool to work with for controlling conditions Dr. Drinker suggested that the committee adopt the levels since they mad already done the researcn of the governmental group that if this committee were to do research work work He believed information and on this subject they would come up with the same stated that he it would be a waste of time However Mr. Gurney did not believe the governmental figures would meet practical every- day problems They were still getting silicosis claims on cases where the values nad been less than the governmental standards AS a rough estimate he suggested half the governmental values as a safe level Mr. Snell pointed out that there would always be some cases of silicosis because of individual susceptibility Dr. von Oettingen asked if the committee couldn't consider sizes since he believed that was as important as the the particle content of silica Mr. Cook believed that the breadta of a limit of precision of the knowledge set up for a dust Evsheonuladlthionudigchattehe tpherelsaecnkt knowledge was not precise on the subject scientific basis for a standard on bilica he believed there was a American Standard would be He felt that a publication as a tentative a contribution to the control of dust exposures Dr. Irish suggested that the whole subject be submitted to new subcommittee so that it could be reworded to make it of some use with the qualification of lack of information as a tentative standard Mr. Bowditch agreed that some kind of a statement snould the government had a definite be prepared even if it were to state that standard which could be used but the Z37 committee did not believe they had enough information to develop a standard Upon motion by Mr. Cook seconded by Mr. Bowditen it was VOTED that this matter of silica dust be submitted to a subcommittee with a request that it submit a report one month before the next meeting of the full sectional committee 185. Cyclohexane Cyclohexane Cyclohexanol Cyclonexanone Methylcyclo- . hexane Methylcyclohexanol Methylcyclonexanone Nitroethane 2that drafts Min 153 and 154 The Chairman explained Nitropropane these substances had been prepared under a tentative standard on and sent to all members of the 237 committee He read . procedure the introduction to these tentative standards The Secretary ex- that it would now be possible to turn these over to the Edi- plained then send them to letter ballot of the whole torial Committee and to ask Dr. Kenoe first if he wished committee The Chairman preferred to revise any of the values his subcommittee had set up 4 a SUTO020 0194 0194 019 0194 4 0194 0194 0194 a a ~ 237/264 11 May 18 1954 Upon motion by Mr. Bowditch seconded by Mr. Gurney it was VOTED al that Dr. Kenoe be asked if he still was ment with the present figures or if he revise them in agreewished to 186. Radium and Radon Gas Min 148 It was noted that Dr. Greenburg as chairman of the subcommittee on this subject mad prepared a draft which had been sent out to this committee Comments on the draft had been sent to Dr. Greenburg but he had not yet replied There was some question as to whether or not Dr. Greenburg still wanted to be on the committee since his change of assignment in work Mr. Stokinger remarked that he would like to accept the decisions of the National Bureau of Standards on this subject Hom over it was pointed out by Mr. Stratton that the Nob expressed its valu^'s in a form that would be difficult for the 237 committee to use Before making a change the views of the whole sectional committee would have to be considered The Chairman agreed to write to Dr. Greenburg on this subject 187 Chlorine Min 155 Mr. Stratton's subcommittee nad prepared a statement on this subject which recommended a concentration of 3 ppm See 237/263 Mr. Low stated that 20 ppm was low enough for health Dr. Irish reported that carefully controlled ex- periments with humans exposed to between 3 and 5 ppm for four hours had produced reactions sometimes there was difficulty in breathing or a bronchial response Mr. Stratton explained that the figure of 3 ppm in his report was a compromise figure His subcommittee believed 3 ppm was as close on the nigh side as they could recommend He had nothing further to add to that report In answer to a question from Mr. Cook Dr. Irish stated that he did not know whether 2 or 3 ppm were a better value thougn ne did believe 3 ppm was getting very high Mr. Schrenk believed that if it were set at 2 ppm the ACGIH might go along with this value If it were set at 3 ppm they might not go along with the committee and then there would be two different figures in use On the basis of new information it was believed that the value should be stated at 2 ppm rather than at 3 ppm Upon motiobny Mr. Cook seconded by Dr. Irish it was VOTED that the report be a level of 2 ppm submitted to letter ballot at 188 Fluorine and Fluorides Min 147 It was reported that at the last meeting the committee na decided there was not enough information available at the time to develop a standara on this subject Mr. Low believed that the first job for the committee was to break this | SUT0020 79% . ae 237/264 12 May 18 1954 characteristics subject down into the difference in between ous fluorine compounds fluorine HF inorganic fluorides the variThe hazard from certain fluorides hydrofluoric acid etc. was not so much from direct exposure as from absorption into vegetation so Stamford Research and Institute had been working on this suSbtjamefcortd Mr. Stokinger believed that until the committee got beyond the solubility point there was no point in trying to differentiate between the different fluorides He reported the results of a three- day symposium on this subject at Kettering Laboratory asked refer The Chairman believed that the subcommittee should be to study the subject further Therefore it was agreed to the subject back to the subcommittee 189. Smyth in which ject of glycol tion available Glycols The Chairman read a letter from Mr. Henry it stated that his subcommittee had gone over the sub- tests and decided that there was not enough informa- to develop a standard bring would Nitromethane 190. this matter to The Chairman remarked that he would the attention of Dr. Kehoe in the nope that he take it up with his subcommittee 191. Sulphur Dioxide Min 117 The Chairman reported that he would reactivate the subcommittee on this subject Kin if 192. General Policies Concerning Form and Content of Pro- posed Standards 143 Dr. Irish asked the committee couldn't come up with a better concept of what it meant by Standard He believed such a definition was necessary before the members could intelligently decide on certain specifications The Chairman suggested that the committee adopt the term Industrial Hygiene Standard as a name rather than Maximum Allowable Concentration However he believed that Industrial Hygiene to be - Standard would have defined and suggested for a definition 7 Standards of good practice Mr. Bowditch suggested the use of Threshold limits as used by the ACGIH However von Oettingen pointed out that since different individuals varied susceptibility certain chemicals it would be impossible to set an absolutely safe limit In any stand- ard prepared by the committee it should be made clear that the concentration stated might be all right for the average person but harm- ful to a sensitive individual He did not think such a standard in should be considered legal a court Nr insertion of the words the average worker Eowditch suggested the to clarify this situation . There was considerable aiscussion as to which of the follow- ing three terms should be used Occupational Health Standards Occu- pational Hygiene Standards or Industrial Hygiene Standards Mr. a 4 ip SUT0020 | 7 lg 237/264 13 May 18 1954 went Bowditch preferred the tern Occupational Health rather than Industrial Hygiene Mr. Cook stated that industrial was a broader term tuan occupational in that it included any activity Dr. von Oettingen said that sometimes things which were occupational were not industrial Several of the members pointed out that although industrial hygiene had been the common term used over the country in the past occupational was coming more and more into common usage Upon motion by Mr. Cook duly seconded it was VOTED that the term industrial hygiene used to describe the values which was discussing standards be the committee There was some discussion as to whether the maximum con- centrations should be for safety or for comfort It was realized that the standard should be based on an hour working day sometimes a reference indicating that a higher exposure would be safe for a shorter period of time would be appropriate It was generally agreed that the concentration for safety be the basis of the standard with the understanding that a reference indicating a comfort concentration where applicable might also be included Mr. Bowditch suggested committee to work out a preamble be submitted to letter ballot of that the Chairman appoint a sub- or a format for the standaras to the committee He believed the let- ter b^lloton the format would have to be taken before the committee could actually draw up any standards The Chairman appointed Nes rs Bowditch Cook Irish Kay and Schrenk to this subcommittee There was considerable discussion concerning a separate publication in which various questions alta regard to Z37 could be discussed The publication could be made available as an introuuction to anyone who might inquire about the Z37 standard It was also brought out that references in the standards were important in order to show the background that had been considered by the committee in arriving at its decisions Upon motion by Dr. Irish duly seconded it was unanimously . VOTED that the Z37 sectional committee adopt the idea of giving references in the completed standards - as a basis for their reasons There was some discussion as to whetner concentrations of metallic fumes should be stated in milligrams as had been done in the past or whether this of a milligram per cubic meter as used by the recalled that 10 c.m. was about the amount of per 10 cubic meters should now be in tentns ACGIH Dr. von Oettingen air inhaled auring 3 hours of exposure SUTO020 079 237/264 14 May 18 1954 Mr. Stratton preferred the use of 10 c.m. He pointed out that from the biochemists point of view 1 c.m. was easier However in selling the standard to industry 10 c.m. would be easier from a psychological point of view in that the allowed milligram would not then be in decimals In answer to a question from the Chairman Dr. Drinker stated that the governmental groups mad not yet discussed this question Some of the members stated both 1 c.m. and 10 c.m. were being used in the same plant . Mr. Ainsworth reminded the group that the whole purpose of the American Standards Association was to coordinate the ideas of all groups The fundamental job of the ASA was to correlate the different ideas presented He believed that the 237 committee should take a leadership in this subject since it would want its standards to be the standards of the whole country Dr. Drinker agreed that uniformity was more important no matter which figure was decided upon Upon motion by Dr. Irish seconded by Mr. Stratton it was VOTED that the 237 Sectional Committee contact other organizations to try to get their opinions and eventually get some uniformity as to mether to 1 c.n. tiontsions or 10 c.m. as a basis for concentra- 193. Style and Format for Standards Min 81 Dr. McCord remarked that as soon as this committee had settled on a real defini- tion and explanation of what it meant by Industrial Hygiene Standards he hoped that this information could be given wide publicity It might be reported in an article in the magazine Industrial Hygiene and Toxicology He also hoped that this could be published in sev- eral other magazines so as to get just as wide publicity as possible Mr. Ainsworth suggested that the subcommittee on this sub- ject might wish to consider the possibility of naving a single document which would be an introduction to all of the 237 standarus with the idea that each individual standard might be published on the ... front and back of a single sheet He reported that this system was now being used in one of the ASA projects on photograpny were they had many single sheet standards on photographic cuemicals Dr. Oettingen remarked that in the field of photograpny most of the chasers would be interested in standards for several chemicals von purwhere- as in industrial hygiene there would be a large number of people uno might be interested in only a single standard from the Z37 committee Mr. Bowditch remarked that in his work he might nave occasion to send out 50 copies of a single standard from 237 and that if this system were used then he would also nave to mail out 50 copies of the introduction The Chairman suggested that if the Z37 standards * SUTO020 |? 7 o ae SsB 237/264 15 May 18 1954 were published that they were tion It was on single sheets there might be a simple statement to be used in connection with the published introduc- agreed that these ideas should be referred to the sub- committee for further study of 194. ElectOi ffo icen rs Min The Chairman reported to the committee that Dr. C.D. Selby had resigned as Chairman of the committee and also asked to be relieved of his duties as a member He appointed a temporary nominating committee consisting of Messrs Drinker Chairman McCora and Bowditen to nominate a new chairman After consultation Dr. Drinker as chairman reported that the nominating committee had suggested the name of Mr. H.H. Senrenk There being no further nominations from the floor upon motion by Dr. Drinker duly seconded it was VOTED that Mr. H.H. Schrenk be elected Chairman of the 237 Sectional Committee and that the committee accept with regret the resignation The Nominating Committee was discharged 195. Plans for Next Meeting Min 162 The Chairman be- lieved that order for work of the 237 committee to go forward successfully there should be two meetings of the Executive Committee and two meetings of the full Sectional Committee a year After some discussion it was agreed to hold the meetings of the sectional com- mittee in the middle of May and sometime in the Fall The date or Friday November 19 1954 was definitely set for the next meeting to be held in Pittsburgh This would be in conjunction with the Industrial Hygiene Foundation meetings Adjournment The meeting was adjourned at 4:20 p.m. HGL 6-15-54 Henry G. Lamb Secretary 237 Sectional Committee AMERICAN STANDARDS.SOCIATION STANDARDS.SOCIATION CORPORATED 70 East forty Street New York 17 NY NY oO roa 29/77 4511 4511 . ; Zed* PRIVATE COMMITTEE DOCUMENT ~~ HOT FOR PUBLICATION PES Safety ASA Sectional Committee on Code for Exhaust Systems 29 Safety December 1 1954\ . Subject to Confirmation by so order 2846 of the meeting of the 29 the Chairman ir ASA offices Sectional Committee was called 2.F. Hatch 10 a.m. in Room ne lembers Presant Hatch I.F. Chairman Andresen 1.V. Witheridge W.N. for W.N. for Condy N.S. alt Wallace Gowerman E.R. Dr Brandt Allen y wa MSC i MSC ASHVE ASHVE AES AAPIHHAA Fisher .. Kane .. icDaniel P.N. for 0.G. Stam Stern Arthur C. Stratton Reuel C. Williams C.A. NAFM OCEA IAA ASME ACSC NAMCC Others Present Diggin M.B. alt KES Robinson K.E. alt Lamb Henry G. Acting Secretary ASA Staff AIHA fembers Absent Brown H.R. Turke Frank Farrell A.^ . Greenburg Leonard Griffin .G Hoffman E.E. Massari S.C. liner d.L. USDI CIO IAGLO MAL BLStds NPVELA AFS MCA Morse I.M. Navy Department Roark 1.2 Silverman Leslie Vedder 7.0 leber Nm Yaffe C.D. ACGIH MFA MAL FEMA ASEE USPHS) 7, Approval or Minutes The Secretary reported that the minutes of the last meeting eld April 27 1951 nau been circulated as 29/59 to the members No corrections or additions had been received iv SUTO020 |/_ nT leaky -2- 59/77 December 1 754 Upon motion by Mr. Stern July seconded it was VOTED _. that the minutes of the April 27 1951 meeting 29/59 Je approved as circulated 3 Scope The Secretary gave a crier review of one expansion of the 29 scope and the withdrawal 01 the 35 project Whereas the 29 project had been active and nau published two documents the Z5 project on Ventilation Code nau done very little work The sponsors of the 25 project had suggested that Z5 be withdrawn that the part on ventilation ce included In the A53 project on Building entilation and that the part operation cluded in the 29 scope This Code Requirements for Light and on industrial be in- suggestion nad been submitted to suggestion witnarawn ASA and as a 153 scope had result the 25 project had been been expanded to include mechanical une ventilation and the scope of 29 had been expanded to include general ven- tilation as follows Standards for the design operation ana maintenance of equipment to provide a safe atmosphere in industrial sanufacturing or construction operations cy removing narmful substances by either local exhaust or general ventilation and by safely disposing or such substances ana suen supplementary standards on personal protection as may be ecessary to prescribe methods for the pro- section of workers A discussion followed concerning the broad implications of this enange in scope The Lecretary explained that if the Committee wished to nave its scope changed it could present suen a re- quest to the Ab^ for consideration Mr. Stern pointed out that the present scope permitted the committee to go as far as wiey wanted on the subject without actually getting into air conai- tioning which would be included under the 53 project The Gembers believed that the 53 and 19 projects would not overlap but that they should conform to each other After & comparison or the old and new 29 scopes It was agreed to accept the present 39 scope for the committee 9 Report of Subcommittee on Fundamentals Min 3 Brandt around 1951 sion of the as Chairman of the succommittee reported Glab the members had met Fundamentals Code quite citen to consider a The subcommittee ad gone revi- into into great detail on the revision and Dr. orang believed the coue had become too broad and had gotten away from the original pur- cose of Fundamentals Recently less and less had been done cy his subcommittee Since the feeling seemed to be that the need for such a code which nad existed in 1936 no longer existed and because the feeling seemea 50 uf that recently there w.4a SUTO020 kl i 1771 bhekay ens -3- 29/77 December 1. 1354 been more published on this subject subject Dr. Branat suggested that the subcommittee be distanced or or organized with an entirely different group with a different diferent point of view In answer to a question from Mr. Stern Dr. Branat admitted that the question of whether the present code should je revised reaffirmed or withdrawn nad not seen discussed The Chairman stated that whereas the Fundamentals had served a useful purpose in the past it was revising if it were not withdrawn fact that so little nad teen now now out of date and needed The Secretary reviewed the about the subject subject when the document American was published Standard but that it sad not even been approved published merely as a report ADA as WAS still receiving requests for the Peport and believed something should be done about it ie went on to suggest that if the Report were withdrawn it might be of help if a report could be prepared which listed presently available information on this subject - a bibliograpny Mr. Gowerman stated that in the electroplating engineers with industry entilation work was often done little or no experience and ke believed by that If the Report were not revised that at least a cibliograpny would be useful Ir Fotinson agreed that the same situation existed in his experience that although the material might te available it either wasn else it just wasn't being t available used Spon to all who a question needed it or from Mr. Kane the Secretary explained that although such a bibliograpny procably would not be suitable for approval as an American Standard it would make excellent appendix material to a revised Report There was some discussion as to whether an American Standard on this subject might conflict with the ACGIH Manual or whether it might simply ce a cuplication and therefore not worthwhile Mr. Sondy also suggested that the committee Light develop something whion would ce in conflict with but the Chairman noped that they they standard would state be so codes funda- rental it would transcena the differences in state requirements Dr. Brandt suggested that if the Report as it now stood were published there would be a considerable amount ci good practice material contained in it Hr Lowerman Lelievea so strongly that a standard was needed ne suggested the standard be finished with thought to inclusion or a separate publication concerning good practice Mr. Stern pointed out that the main Question 20 issue was whether or not ^ definite neeQ for such a Standara existed Dr. Brandt recalled that the chly reason ne had suggested dis- banding the subcommittee was bey bey didn't believe a nega existed especially considering so much material was avallucie It was finally agreed that from evidence presented at this meeting a real need for such Estanward Estanward did actually exist Mr. Bowerman suggested that since so much work on revision had already been lone 15 might be worthalle to con- inue with revising it Ar Stern suggested that the subcom- mittee might wish to start a the existing document or could start completely from scraten Dr. brandt believed They that SUTO020 ( 1717 L : l om 49/77 4m December 1. 2754 -ince so much work nad already been cut it should not be dropped The Chairmen the actual fundamentals n^d not caurged ing them had changed Fact and conctueration into one revision that elleved ..o0 Gougn points of lew should ce given regard- to 5A15 Dr. Brandt stated that if the subcommittee were 00 cc0- sinue with its revision the at the sectional committee members would want to know exactly wanted included ne believed that in this way only could the subcommittee accomplish +..6 ,oF th out getting into too much detail a good practice Ar Stern believed that since the two subjects of fundamentals an good practice merged so closely 10 Acuid ..ave to committee to keep them separave Sr. Brandt ce up FO the sub- agreed to get als Subcommittee together for the purpose of reviewing Meir hork and revising the Fundamentals feport 10. Jeport of Subcommittee on Solid Materials mundling Min that 1 his Mr. Kane as Chairman oi the subcomm166ce subcommittee had been inactive since 1950. reported elore Cha time jood jood they had practice done much research unu had information cowever when so they included onto onto some the three groups of operations ian action set up cy rotating equip- lent entrained Less clear de air and static effect the fundamentals cecame explained that the situation varied in different Industries and that althougn ventilation experts in these in- dustries were getting more and more cown on paper there was still very little information on this subject Mr. Aane ala ce- Ileve however that the phase of fundamentals of materials handling material might be a possible subject to work was now available at this time He on since more thought a fundamen- sal document would be a good thing to nave available for the uspose of warning people of the possible canger involved unless they had had actual experience with similar problems He went on to say that some experts nad information available on materials nanuling in four ies A similar group had evaluated good practices in grain _ feed mill and flour mill industries The information nad looked good and r^d con- siderable value from a materials anuling point of view HOW- ever they had discovered considerable Hill Mutual Fire Prevention ureau and disagreement Letween the their subcommittee con- requirentes cerning experience requirentes The subcommittee a bried to encourage ventilation enginners with stature a CLC^ground CLC^ground 60 help them with their proclem - hese men Lau Leen located 50 Jar spart that it naa not been tossicle for them to get together to discuss the problem dr Committee be formed in cruer Aane recommended mat U to approach the problem new subwith new igor and ideas The Chairman suggested that since Svailable in industry it mint be advisable to use that sation for examples This would LE in the noue of getting getting in- Formation that would eventually become independent ci industry concerning There was considerable discussion need for a standard on this subject ia te samples CI sae need fr Stern suggested that the subcommi00~ wud St 13s Cost difficult problems end circuite ch for of ent nu 76- Cearch SUTO020 9 3 734 a, -- ~ 69/77 69/77 December 1 0754 Upon recommendation by Dr. Granat One sectional com- nittee asked the subcommittee to continue with All they n^d together standard - with newly available terlal on the original basis for cul ana to Reconsider the material inuling out in the event that a standard could not te developed on that basis that it then be put on an industry casis Nr Rane agreed to go ahead with the word 11 Report of Subcommittee on turfice Coating Operc- tions Min 2 Ir Ltern reported enairman of this subcommittee m deeting but nad authorised had 50 the or Jeside Silverman been unable to attend this report 50 the sectional com- mittee for nim Ar Stern stated that the last document put out by the subcommittee was dated June 1953 a vage supplement to the draft of the proposed Stanu^rd ..e celleved that the araft pretty was well before it could suvanced anu did not need much more word on it be completed E nu no specific instructions and didn't believe ne was in 0 position to commit e subcom- ittee He suggested however that ur Silvermasked Silvermasked Silvermasked to expedite the pace with which draft was a consolidation of 415 Subcommittee operated task group reports some of Que which vere zore nearly complete than others Dr. Williams agreed to speak to Dr. Silverman about this matter 12. Election The Chairman recalled that ne nad sub- aitted his resignation as chairman of the 2 sectional committee some time chairman and that ago A nominating it was now necessary to elect committee was appointed upon a new their recom- mendation Er Stratton moved it was duly seconded and unani- lously TOTED that the new Chairman of the 29 Committee be Mr. Stern and Mr. Je the Vice Chairman Sectional Fobinson Ir Stern took the cnair It was recalled that Mr. cented the AIHA on this committee ceconded it was unanimously daten Upon nad previously repremotion duly made and VOTED that Hr large 7.F. Maton be elected a memberon the 29 Sectional Committee 13 Plans for Jext Meeting Min b It was decided that the next meeting ol ..e sectional committee could be 10 as soon as reports from the a7ious SULCOmittees could bE com- pleted A tentative date was et lor day 19 -955 14. Subcommittees on Mechanical Cutting ww E Operations and Abrasive supera supera in my THE Chir can recalled that at 1.12 ..50 ing me 5. cujus mal cod Given t the establimment 1 Se 540 additional additional committees SUTO020 5 254 -9- 7 7/77 December 1. -754 The Secretary read in in of the minutes of the woril 27 1951 ceeting Mr. Hatch in Australia it had sported that seen proposed sb the Silicosis Conference that the Conference recommend that regulations te abrasive material adopted proniciting the use ci band This ac teen on the basis that the us an dust problem would be impractical Mr. eliminated However since the the au Sroved Sroved Sroved Sroved naten believed that initiation of wu Subcommittee Subcommittee Subcomite on abrasive plasting operations would be appropriate Upon motion by Mr. Kane culy seconded . Yas VOTED that work on the the subjects of mechanical cutting and abrading operations and abrasive plasting operations de initiated by the 29 sectional committee The Chairman willing tions Chairman suggested that Lernaps Mr. B.C.L. to chairman a sutcommittee on abrasive He agreed to appoint committees committees committees on jemeon woulu be clasting clasting clastinclagsting operalese two subjects 25. Ventilation and Operation of burrace Tanks 19.1-1951 Min by tabulations be appropriate standard The 5 Jr. Mane stated Chatte Chatte had been impressed it made by New fora State and wondered if it would to include that is supplemental data in the 49.1 Chairman believed it would be better to refer the standard back to the subcommittee a with a recommendation that the members consider inclusion of the tabulations Jpon motion by Mr. Stratton quly seconded it was VOTED that the 29.1 supcommittee Surface Tank standard with review a view the Opento revision The Chairman appointed Mr. Bowerman as chairman of this sub- Committee The meeting adjourned at 1 p.m. of the Chair subject to the call Heury From Heury J. From From Henry G. Lamb noting secretary Sectional Committee 29 CL - 8-10-54 _ _ SUTO020 * ! 8 Laat - ~ AMERICAN STANDARDS INCORPORATED SSOCIATION < 70 East Forty Street New York 17 N. Y SA - otra 274 NOT FOR PUBLICATION MINUTES + a ASA Sectional Committee on Allowable Concentrations of Toxic Dusts and Gases 237 Subject to Confirmation The meeting was called to order ATION ATION Chairman Dr. ATION ' William P. Yant at 1:35 p.m. in the Conference Ropes ' offices 70 East 45 Street New York N.Y. ASA ATION Yant Wm P. Chairman Bowditch Manfred Cook Warren A. Cranch A.G. Dooley Allan E. . Foulger FOR Irish Don D. ; McCord Cares ATION , H.H. , Henry F. Jr. Snell M.A. Stratton Reuel C. von Oettingen W.F. Vosburgh B.L. Math Math Math ACSC AICE Math Math FOR Others Present Low Frank S. Westvaco Division Food Machinery & Chemical Corp. Lamb Henry G. Secretary ASA Staff Absent Math Bishoff F.X. DA Kay Kingsley Liaison CSA Brown Hylton R. .- USDI Kehoe R.A. AIHA Cralley L.J. APHA Lanza A.J. MatL Drinker Philip MatL Machle Willard Math Elkins H.B. IAGLO Osborn S.H. CSPHANA * * Greenburg Leonard ACGIH Sands F.W. NSC Gurney S.H. NAMCC Sehl Fred W. Natl Haggard H.W. . Stockinger H.E. USPHS os . Hatch Theodore F. Math 210 Approval of Minutes of Last Meeting Win 196 _ The Secretary reported that the minutes of the meeting of November 19 1954 had been circulated to all mem1b9e5r4s coas nc2er3n7i/n2g71MinDurt.e v 20o2n Oettingen had written on December 20 SUTO020 0754 0754 007574 54 0754 237/274 on page 7. state that mittee was centration He stated that one sentence should be corrected to he had reported that all willing to accept 10 ppm rather than as a maximum but one member of his subcom- as an average allowable conallowable concentration Mr. Warren Cook by letter of December 21 1954 nad advised that on page 11 he had mentioned his interest in regard to enlorinated hydrocarbons Mr. Irish by letter of January 24 1955 had recalled that in Minute 208 Dr. H.H. Schrenk was actually enairman of the subcommittee and he had only been appointed a temporary chairman for the meeting on November 19 because Dr. Schrenk had been unable to be active at that moment Dr. Cranch also recalled that in Minute 197 the third paragraph on page 3 should show that he had also received comments from Mr. McDaniel He explained that Mr. McDaniel ciation was not a member of the Manufacturing Chemists Asso- . : : . With these corrections the minutes were approved as circulated Carbon Sulfide 237.2 211. Carbon Monoxide 237.1 Hydrogen Disulfide 237.3 Manganese 237.6 Mercury 237.8 Methyl 237.18 Min 197 The Chairman recalled that these standards were to have been reviewed by the Editorial Committee as far as bibliography etc. was concerned The subcommittee had finished its work and was waiting for the format to be decided upon reported tary letter 212. Cadmium Oxide Fumes 237.5 Min 198 The Secre- that 27 affirmative votes nad been received on the ballot 237/270 which had been sent out on this question The ballot could now be closed and the information submitted to a subcommittee to be written up in the new style with a maximum acceptable concentration of 0.1 milligram of Cadmium per cubic meter of air The Chairman agreed to appoint this subcommittee 213. Xylene 237.10 Toluene 237.12 Styrene Monomer 237.15 Formaldehyde 237.16 Min 199 It was reported that Dr. Smyth's subcommittee had considered the comfort levels of these substances and had the information ready for the Editorial Commit- tee to write up in the new format that pare tee 214. Lead Z37.11 Min 200 Mr. Bowditch reported he had not been able to get his subcommittee together to prea detailed report for submission to the Z37 sectional commit- He would do this requesting comments from the members Oxides 215. of Nitrogen 237.13 Min 201 The Chairman reported that Dr. Stockinger had submitted a draft of changes to his subcommittee but had not yet advised the ASA of any definite conclusions It was decided that no action should be taken on this subject until Dr. Stockinger's draft was ready and submitted to the sectional committee for comment SUTO020 Cate] woo fTao;mi ; -3- 237/274 May 13 1955 chloroform 237.19 Dichloromethane , 216. Carbon Tetrachloride 237.17 Min 202 TrichloroTetrachloroethylene Ethylene dichloride Methyl chloroform Dichloromethane Min 203 Br von Oettingen reported that his subcommittee had all these standards except the one for Methyl chloroform ready to be written up in the new style They did not have sufficient information as a basis for arriving at a decision on commercial Methyl chloroform because of the addition of stabilizers He understood that Mr. Irish would get some in- formation together on this subject The Chairman suggested that Dr. von Oettingen's subcommittee wait until they had information on the stabilizers before doing any more work on this subject Dr. von dseeclifded Oettingen agreed that when on the new style he would the Editorial Committee nad write up the final drafts him- 217. Silica Min 204 and his subcommittee were ready to they had copies of the new style It was reported prepare a draft that Mr. Drinker as soon as 218. Radium and Radon Gas Min 205 It was recalled that at the last meeting Mr. Harris and Mr. Stratton had agreed to prepare the final editorial details in accordance with comments which had been received and submit a revised draft to the Secretary for submission to the sectional committee for letter ballot action The Secretary reported that he had received a revised draft from Mr. Harris It was agreed that in preparing the final standard mention would have to be made of the people on Dr. Greenburg's original subcommittee which considered this subject Thanks were extended to Mr. Harris and Mr. Stratton for finishing this work 219. Cyclohexanol Methyl- Methylcyclohexanol Cyclohexanone cyclohexane Methylcyclohexanol Methylcyclohexanol Methylcyclohexanone Nitroethane Methylcyclohexanone Nitropropane Nitromethane Min It was reported that these standards were ready for final letter ballot action and it was suggested that Kehoe be requested to get the standards in final form for submission to ASA 220. Mr. Stratton's torial format subcommittee Min 207 subcommittee had this The Chairman reported that standard ready for the edi- Work 221. standards in need of is shown in Minutes in Progress Ine Chairman recalled other revision Discussion these substances 222 through 229 inclusive 222. Benzene 237.4 Min 167 It had been agreed that a subcommittee be appointed to study a possible revision of this standard The following names were suggested as possible members Hervey B. Elkins L.T. Fairhall Dr. Horace W. Gerarde Dr. Leonard Greenburg F.W. Sands H.H. Schrenk -4- 274 May 13 1955 168 .It 223. Cadmium Dust Min 168 It had been agreed that a subcommittee be created to study first the need for a standard on dust from cadmium compounds and if it were decided that a need existed to recommend a MAC value The following names were suggested as possible members of the subcommittee Anna M. Baetjer S.W. Gurney Dr. Harriet L. Hardy Dr. Dudley Irwin Dr. Frank Princi 224. Chromic Acid and Chromates Z37.7 Min 170 The Chairman recalled that the meeting of May 18 1954 nad authorized the appointment of a subcommittee to review and study this subject The following names were considered for membership on this subcommittee Anna M. Baetjer Willard Machle Dr. Norton Nelson Some representative of both the Public Health Service and the Berylium Corporation were suggested explained vestigate In answer to a question from Kr Cook the Chairman that a subcommittee on this subject would have to inthe feasibility of evaluating the extent of the hazard before writing the standard 237.9 225. Arsenic and Arsine Kin 172 It was sug- gested that these two subjects should be considered separately During the war there had been a standard on arsenic but since then it had been withdrawn and had never been reinstated The Chairman suggested that a subcommittee be formed to explore the need for standards on these subjects The following names were suggested for a subcommittee Edward Leb Gray Kenneth M. Morse K.W. Nelson or Dr. Sherman S. Pinto Dr. L.N. Spolyar Methanol 237.14 226. Hin 177 The Chairman re- called that the present concentration for this substance was 200 ppm and a question had been raised as to whether this was too low and might be raised to 400 ppm The following names were suggested for a subcommittee Dr. A.G. Cranch Hervey B. Elkins Dr. J.H. Foulger or R.G. McAllister Dr. Carey P. McCord H.H. Schrenk Dr. Foulger suggested that someone from the hat industry might be helpful .227 Acrylonitrile Z37.20 Min 183 A draft had been prepared on this subject but because of insufficient information it had never been submitted for approval A year ago it had been decided to organize a subcommittee to study this subject further Names suggested for members of a subcommittee were as follows William R. Bradley or Boyd C. Shaffer W.E. McCormick someone from duPont and from Union Carbide and Carbon Corporation someone Cranch and Dr. Smyth agreed to look into this situation 228. Fluorine and Fluorides Min 188 A year ago it had been decided to d~ lay standardization on this subject until more research had been done Mr. Low reported that several laboratories were now working on this subject such as University of Washington University of Oregon Stamford University and Battelle Hemorial Institute People suggested for future subcommittee work on this subject were Harold Hodge Dr. Dudley Irwin E.J. Largent Norton Nelson H.E. Stockinger SUTO020 Yoo es -5- 237/274 May 13 1955 Min 191 229. Sulphur Dioxide Min 191 The following names were suggested to form a subcommittee to study this question Mary Amdur Isador Greenwald Norton Nelson Dr. Sherman S. Pinto or John N. Abersold Joseph F. Freon Jr. E.E. Evans of duPont had been suggested by Dr. Machle Dr. Foulger doubted if Mr. Evans would have much information available on this subject 230. New Substances Min 157 The Chairman recalled ; that the Safety Standards Board had suggested to the Z37 sectional committee that it look into the following three substances as possibilities for standards Butadiene The Chairman asked whether the members be- lieved there was a need for a standard on this subject He be lieved it mostly caused explosion hazards Messrs Smyth and Cook pointed out that as far as their experience was concerned they did not believe there was a need for a MAC It was agreed that 237 recommend to the SSB that there was very little need for a toxicity standard on butadiene and that the explosion nazard was most important . Bervlium Mr. Cook reported that to his knowledge there had been no case due to berylium where exposures had been less than 1 or 2 gamma per meter Mr. Bowditch mentioned that one company had put special warning labels on shipments of berylium they had sent out Mr. Nelson said that the AEC used two standards on this subject one for inside the plant and one outside Hr Cook believed that there was enough data on this subject so that something could be done in the 237 committee about arriving at a MAC for berylium oxide He felt that if the committee could not agree on a standard it might at least make , a statement on this subject It was agreed that the 237 committee should explore this situation and in the meantime tell the SSB of their decision People suggested for a subcommittee on this subject were Merril Eisenbud Harry Foreman or Dr. Thomas L. Shipman Dr. Harriet L. Hardy Dr. G.W.H. Schepers James H. Sterner C.R. Williams Alkali Dusts and Mists Mr. Irish believed this was a broad subject and Mr. Smyth agreed saying it was too broadwas Members of the sectional committee suggested that some- time the committee might prepare a standard on ammonia Other members suggested that work on this subject be deferred until a later date It was agreed that Dr. von Oettingen's subcommittee should study the subject of methyl bromide Dr. von Oettingen remarked that it might take the members quite while to develop that a standard on this subject It was suggested Dr. Kehoe be requested to submit information on chlorinated hydrocarbons in accordance with the suggestion by Mr. Cook at the last meet- . le 7 SUTO020 x -: | -. -6- 237/274 May 13 1955 Mr. Irish stated that his company had been working on many additional substances this work to the ACGIH and They nad provided information on they also reporting it to the Z37 committee simply for information purposes Mr. Irish to provide this information for the 237 committee and as as it is received it will be duplicated and circulated to agreed soon the mem- bers of the 237 committee It was agreed that these substances could be grouped so that they might be handled by about four subcommittees Mr. Irish asked for volunteers to serve on nis subcommittee with him Mr. Smyth volunteered to work on some of these subjects Mr. Irish also requested that each member of the 237 committee study the values he had suggested send their comments to him He would sincerely appreciate opinions from other members of the committee on these levels . 231. General General Policies Hin 192 There was general discussion concerning the membership of the 237 committee and several suggestions were offered for additional members Format 232. Style and for Standards Min 193 The committee reviewed document 237/273 which had been mailed to the members as a proposed foreword for the American Standard Acceptable Level as submitted by Mr. Schrenk chairman of the subcommittee It was agreed that maximum allowable concentration be changed to maximum acceptable concentration This would still leave the abbreviation HAC Mr. Irish did not believe there was enough explanatory material about hazards in logical factors should be that this paragraph could paragraph 2.3 He believed the physiofurther explained Dr. Schrenk agreed be expanded to be more informative Mr. Low wondered if the committee were going to write one specification for inhalation and another for skin absorption or whether all information on a given subject would be included in a single standard The Chairman commented that if more were - known about skin absorption then these could be written into the standards It was agreed that all information on a given substance be included in a single standard om . Dr. Foulger asked whether the 237 committee could add in paragraph 3.2 that where hazards other than inhalation were in- volved a special paragraph outlining the hazards be added The Chairman stated that it was intended that this be put into para- graph 2.3 in discussing the material and its hazards e pare It was agreed that the Editorial Committee snould second draft of the foreword in accordance with this : cus ion cussion predis- 233. Election of Officers Min 194 The Chairman ap- pointed a nominating committee consisting of Dr. McCord as chair- Mr. Bowditch and Mr. Cook to consider the replacement of man the present chairman Dr. McCord gave a report of their decision They were not willing to accept a resignation from the present SUTO020 -7- 237/274 May 13 1955 Chairman They felt that like to nominate Dr. W.P. tion for one year hence ensuing year if there had to be a vacancy they would Yant as Chairman with no further elec- Dr. Yant accepted chairmanship for the 7 accepted agreed to which was 234. Plans for the Next Meeting Min 209 It was hold the next meeting in Pittsburgh on November 18 the Friday ending the week of the meetings of the Indus- trial Hygiene Foundation Dr. Schrenk agreed to make the to hold the meeting at the Mellon Institute There would committee meetings in the morning and the full sectional plans be sub- com- mittes would meet in the afternoon Adjournment The meeting adjourned at 4:00 p.m. HOL NF La J. Lb ab Henry G. Lamb Secretary Sectional Committee 237 SUT0020 ~ American StandARDASSOCIATION StandARDASSOCIATION INCORPORATED 70 East Forty Street New York 17 N. Y. . BA 237/276 August 8 1955 June 20 1955 Proposed Foreword for American Standard Acceptable Level of Exposure Acceptable Concentrations For many years it has been recognized that there are levels of concentration of atmospheric contaminants to which a person may be exposed without known ill effects or discomfort In view of the impracticability of maintaining uncontaminated air in most industrial situations concentrations of contamination have been accepted for many materials commonly encountered in industrial operations These con- ee centrations in themselves do not represent a scale of rela- ~ tive hazard from toxicity They represent the concentra- tions of contamination below which ill effects are unlikely to be experienced by any but hypersensitive individuals These concentrations are usually based upon data obtained by one of the following procedures 1 3 3 4 Laboratory tests on animals medical Laboratory tests Environmental and medical human subjects medical investigations in plants Some combination of the foregoing methods A common feature of these procedures is that the experimental exposure shall correspond to the normal work pattern This should be taken into consideration also in the application of maximum acceptable concentration values Three criteria have governed in the establishment of these concentrations 1} - 2) 3 Organic or other tissue changes Functional reactions which have no discern- ible untoward effects on health but cause impairments such as incoordination and increased proneness to accidents Discomfort or adverse sensory effects In those cases where the concentrations have been established on the basis of organic changes it is logical SUTO020 ae Panel le The 1 e omens as ame ilo wom Cr =~ ~ A -2- 237/276 August 8 1955 x to assume that repeated exposure to concentrations signifi- cantly in excess of the acceptable concentration probably would produce injury Where the level has been established on the basis of a functional change or discomfort it is logical to assume that exposure to concentrations not greatly exceeding the acceptable concentration would not necessarily produce material injurious effects Hence it is important to understand the criteria upon which any such concentration has been established . While the purpose of the acceptable concentration is to minimize health hazards its immediate use is for guidance establishing engineering procedures to prevent objectionable concentrations of toxic or obnoxious materials from being present in the air of work places Comparison or the results of air analyses with these concentrations indicates acceptable conditions or otherwise the need extent and urgency of control measures Sampling and analysis should be carried out by competent personnel using an acceptable method which will provide a reliable measure of exposure Air analyses in conjunction with acceptable con- centrations serve as a measure of exposure - not as a means of diagnosis of occupational disease Such diagnoses should be based on a consideration of all factors including results of clinical and physical examination as well as of air analyses and a knowledge of toxicologic effects of the materials kept In in mind the application of that the standards it should be . 1 : 2 3 4 5 The acceptable concentrations serve as stand, ards of good practice They serve as engineering guides for design and operation . They should be applied and interpreted by competent individuals with a full under- standing of the basis and limitations of theinformation on which the standard is It is advised that these standards are con- . sidered to be guides toward good hygiene but are not suitable for the establishment of legal requirements to The levels are applicable only to exposure to a single substance In the case of exposure to mixtures the effect may be increased or decreased and controls should be based on : the specific situation JHE e SUT0020 AMERICAN STANDARDS ASSOCIATION INCORPORA 70 East Forty Street New York 17 N. Y. ASA . 237/296 To the Members of Sectional Committee Z37 ,, correction to Minutes of Meeting Gentlemen You will recall that we have just sent you minutes of the meeting of December 6 237/295 We now find that an error was made on page 9. We are enclosing a corrected page 9. Will you please use this as a replacement in the minutes of this meeting Very truly yours HOL NF Encl 00 Alternates Organisations HerG. rLayu Sectional Committes 237 Ce ana _ o AMERICAN STANDARSTANDARSSASSOCIATION : INCORPOR 70 East Forty Street New York 17 N. Y. ' kunilhy kunilhykunilhy kunilhy 237/295 NOT FOR PUBLICATION ASA Sectional Committee on Acceptable 237 Concentrations of Toxic Dusts and Gases 237 December 6 1956 Subject to Confirmation The meeting was called to order by the Chairman Dr. William P. Yant at 10:05 a.m. in Rooms 2944-46 of the ASA offices Yant William P. Chairman Schrenk H.H. Vice Chairman Bowditch Manfred Brown Hylton R. Gralley Lewis J. Elkins H.B Irish Don D. Kay Kingsley Liaison Ainsworth Cyril ASA Staff Gurnham C. Fred alt Holts John C. Guest Members MatL MatL Math USDI APHA Present Low Frank S. alt McCord Carey P. alt to Robert A. Nelson Norton Sunds F.W. to J.H. Kehoe Foulger MCA IMA AIHA MatL NSC TAGLO Stokinger H.B. Liaison Math Stratton Reuel C. CSA von Oettingen W.F. USPHS ) AIChE MatL Others Present McCollister D.D. Guest AIChE Lamb Henry G. Secretary ASA Staff USDI Members Absent Abernethy D. Bishoff P.M. Liaison Cook Warren A. Drinker Philip Greenburg Leonard Hatch T.F. Lansa A.J. BLS Machle Willard . ' DA Osborn S.H. ASSE Sehl P.W. . MatL Smyth Henry F. Jr. ACGIH Vosburgh B.L. MatL Williams C.R. MatL MatL CSPHA _ MatL MatL Math NAMCC 249. Approval of Kinutes of Last Meeting Min 235 The Chairman re- called that the minutes of the November 18 1955 meeting had been circulated to . all members as Z37 There no corrections or additions the minutes were approved as circulated . 250. the American Standards posed standard sponsor Carbon Tetrachloride 237.17 Min 240 The Chairman reported that Association had received the formal submittal cthis pro- - from the U.S. Public Health Service which was acting endorsing SUTO020 ite 13 13 mined 237/295 251. Formaldehyde Z37.16 Min 237 The Secretary reported that the draft of this standard had been sent to letter ballot in December 1955 and three negative votes had been received Lewis J. Cralley had voted in the negative questioning as to whether the technical work on Formaldehyde would support a MAC of 10 ppm Hervey B. Elkins had voted in the negative He believed that a standard for the comfort level should be shown first in the standard and that the 10 ppm based on potential organic changes should be only mentioned afterwards Dr. McCord had voted in the negative because paragraph 3.1 had shown acceptable concentration " rather than maximum acceptable concentration It was agreed that this was an editorial matter which would be taken care of and Dr. McCord asked to be recorded as having changed his vote from no to yes basis of hand the Dr. von Oettingen commented that if a discomfort level were set up on the a disagreeable odor he believed that that was one thing If on the other comfort level were set up on the basis of irritation to the eyes and if - this irritation were so severe that people could not see what they were doing or where they were going this might cause accidents in the plant On that basis it might be a very important consideration Dr. McCord believed that certain people were allergic to Formaldehyde and he wondered if the standard was concerned with allergies Dr. von Oettingen believed this question had been taken care of in the preamble where it was stated that the concentrations were the maximum below which ill effects were unlikely to be ex- perienced by any but hypersensitive individuals : There was some discussion concerning the difference between the health leval and the comfort level agreed that the safe level be was generally agreed that the Dr. Irish pointed out that the committee had already the standard and the comfort level be separate It negative votes received on this ballot had been given due consideration Upon motion by Dr. Schrenk seconded by Mr. Stratton it was that it was the sense of this meeting that a consensus had been reached concerning a standard on Formaldehyde and that it should now be submitted to the ASA for approval as American Standard Dioxide 237.13 - 252 Oxides of Nitrogen Z37.13 Min 239 The Secretary reported that _ the draft on Nitrogen Committee with letter ballot 237/293 had been referred to the 237 Sectional Up to the time of this meeting there had been 22 affirmative votes one ballot marked not voting and one negative vote The voting ballot had been submitted by Hylton R. Brown representing the U.S. Bureau of Mines With it he had submitted a letter explaining that Mr. L.B. Berger alternate on this committee for the Bureau of Mines had also questioned some of this standard and Dr. John C. Holtz who was in charge of diesel testing at their Pittsburgh Station had raised several technical questions concerning both the methods of test which had been shown in the standard and also the maximum acceptable concentration of 5 ppm particularly in its relation to the use of diesel engines in mining or other underground operations SUTO020 237/295 -3- December 6 1956 Dr. Dr. Foulger had voted in the negative because in his opinion the proposed level of 50 ppm NO for 3 - 5 minutes exposure was high He reported some of the experiments in the Haskell Laboratory in 1941 and other observations concerning this level Copies of the letter from Mr. Brown including Dr. Holtz's comments and the letter from Dr. Foulger had been sent to the chairman and vice chairman of the 237 sectional committee and also to Dr. Stokinger chairman of the subcommittee which had developed this standard Mr. Brown had brought Dr. Holtz to this meeting and Dr. Holtz very kindly presented his technical comments for the benefit of all members present Dr. Stokinger commented that the present draft was on the single item of nitrogen dioxide whereas the previous standard had covered oxides of nitrogen in general He understood that the Army Chemical Center had reduced its own standard for nitrogen dioxide to 5 ppm The members appreciated the presentation made by Dr. Holtz and asked many questions in order to clarify their thinking After further considerable discussion it was understood that the letter ballot 237/293 would be withdrawn in order that this draft could be referred back to Dr. Stokinger and his subcommittee so that they night further study the comments from Dr. Foulger and the Bureau of Kines Trichloroethylene Dichloromethane 253. Iylene 237.10 Toluene 237.12 Styrene Monomer 237.15 Min 237 Trichloroethylene 237.19 Tetrachloroethylene Ethylene dichloride Methylene Min 240 The Chairman reported that drafts of these been sent to the secretary for submission to the sectional committes for letter ballot action 25. Carbon Monoxide 237.1 Hydrogen Sulfide 237.2 Carbon Disulfide 237.3 Manganese 237.6 Mercury 237.8 and Methyl Chloride 237.18 Min 236 Dr. reported that drafts of these standards were still in the hands of the Editorial Committee He had asked various individuals on his Editorial Committee to each work on the draft of one substance and he hoped that these drafts would soon be ready to send to the secretary working Bensene 255. Benzene 237.4 Min on this substance reported with his letter of November 245 Dr. Elkins chairman of the subcommittee that he had sent the secretary a draft on 9. His subcommittee had brought down the level from 100 ppm to 25 ppm The members felt that with this change there would be a desirable factor of safety and they had therefore made the change Upon motion duly made and seconded it was VORED that this draft be sent to letter ballot action after put it in final form the the sectional Editorial committee Committee for had SUTO020 0139 0139 et 0139 237/295 -4- December 6 1956 4 237.5 256. Cadmium Min 212 The Chairman stated that he would set up a subcommittee to review the present standard It was the intention that the com- mittee would develop one standard on cadmium oxide fumes and the committee would the need for a standard on cadmium oxide dusts There had been csoonmseidseurggessetpiaornastelthyat the standard for fumes be at the level of 0.1 milligram of cadmium per cubic meter It was thought that perhaps a different level might be used for the dust his 257. Methyl Chloroform Min 240 Dr. von Oettingen reported that subcommittee had developed a draft on commercially pure methyl chloroform Most of the brand name products on the market included other chemicals as inhibitors and asked for instructions from the 237 sectional committee as to what they should he use of Dr. Irish said that his company had studied this solvent with and without an inhibitor and could not find any difference in the results He recalled that in the past the 237 committee had prepared standards for the commercially pure products and had not developed standards for mixtures He believed that in connection with methyl chloroform the subcommittee should still stick to the commercially pure substance and not get involved in a mixture which would result from the inhibitors He did not believe that the American Standard should mention brand names Dr. von Oettingen said that he would send his draft to Dr. Irish to be checked and it could then be sent on to the Editorial Committee It was agreed that this standard should be on methyl chloroform as such 258. Methyl Bromide Min 247 Dr. von Oettingen said that his subcommittee had prepared a report on this substance and had agreed on the MAC as 20 ppm However two members Dr. Stokinger and himself had been concerned because 30 ppm in a larger group of persons was safe and perhaps 20 ppm was a low concentration He asked for the opinion of the members of the sectional committee Mr. McCollister said that they were satisfied with 20 ppm concerned Mr. Low believed that there had been some bad cases due to skin contact with methyl bromide The Chairman recalled that this subcommittee had in the past discussed the possibility of enlarging its scope to include dermatitis but had come to the conclusion that it had plenty of work to do for the present if it still limited its scope to matters of inhalation Mr. McCollister stated that they had no evidence of systemic effects from skin contact but were with the problem of inhalation Dr. Irish said that he believed that a splash of this chemical on the skin produced a definite hazard but he had no evidence of absorption through the skin into the body Dr. von Oettingen presente,a draft on methyl bromide as the work of his . subcommittee fe SUTO020 Tg- aT. 237/295 -5- December 6 1956 ra Upon motion by Mr. Dooley seconded by Dr. McCord it was VOTED that the MAC for Methyl Bromide be set at 20 ppm and that the draft of this standard should be sent to letter ballot of the sectional committee for final action as soon as the Editorial Committee had put it in final form 259. Chromic Aoid and Chromates 237.7 Min 246 a written report from subcommittee as follows Dr. Nelson submitted 1. There is no new information known to the would suggest a better value for ,, asailrritation the present standard of 0.1 mgm subcommittee which and perforation than 2. Exposures to chromium chemicals are associated with increased incidence of lung cancer Neither the specific materials nor the con- centrations responsible for this increase are known Consequently there is no present basis for setting standards applicable to lung cancer 3. It is recommended that a Effort be made to secure new information for substantia- tion or revision of the present standard insofar as nasal irritation is concerned It appears that several plants may now be in a position to provide such information It would be useful to the subcommittee to have an official letter from the Z37 committee urging industrial cooperation in the collection and systematic analysis of current plant experience b At such time as this new information is at hand the present standard should be reissued on that basis and should include a statement explicitly noting that the standard has no relevance to hazard of lung cancer The Chairman suggested that the members might be continually on the lookout for information concerning the relationship between this substance and cancer Dr. Nelson was authorized to write to various places for information in order to prepare a more formal recommendation for the sectional committee lead 260. Lead 237.11 Min 238 Mr. Bowditch reported that he had sent a draft to the secretary on November 29. His subcommittee had unanimously approved a value of 0.5 milligram of lead per cubic meter of air for lead chromate and sulfide They had also recommended that the standard for metallic lead and all other of its inorganic compounds be 0.2 milligram of lead per cubic meter of air His main question was with regard to the acceptable concentration His subcommittee had unanimously approved the value however he had received comments from Messrs Kehoe and Hazard concerning lead silicate Dr. Elkins said that he nad ... SUTO020 | lai Tid| 237/295 06- December 6 1956 4 some doubt as to be good evidence therefore not as whether that it toxic or not this should was not soluble in be included and believed there should water that it was not absorbed and Dr. Schrenk thought that experience concerning the hazard of lead silicate versus lead oxide might be of help to the committee The Secretary suggested that if the concentration were accepted as it now stood then a revision could be begun immediately after approval He thought this might be returned to the subcom mittee before submission to final letter ballot The Chairman wondered how long it would take for the subcommittee to get information on silicate Dr. Nelson pointed out that the other standards in the 237 series had been on the books for a long time and he wondered if they had been restricted Mr. Bowditch said that they needed to distinguish between the more soluble lead oxide and the chromate Dr. Elkins said that only sulfide and chromate had been changed in Massachusetts In answer to a question from Dr. Schrenk Dr. Stokinger stated that their level was close to that of the ACGIH The Chairman said Dr. Kehoe felt that he did not like to change values already set but that in this case he thought they were not going outside the bounds of safety Upon motion by Dr. Nelson seconded by Dr. Schrank it was VOTED that the values set up in the draft submitted by Mr. Bowditch be accepted In accordance with a suggestion from Dr. Schrenk Mr. Bowditch agreed to write to his subcommittee telling them of the various commenta he had received and asking for their opinions concerning inclusion of lead silicate " 261. Radium and nothing new to report from something definite down on Radon Gas Min 242 Mr. Stratton his subcommittee He said that he paper within two months stated that he had would try to get 262. Chlorine Min 244 port on this substance either His Low and although they had approved new style Mr. Stratton said that he had nothing to resubcommittee consisted of Messrs Irish and the values they had to prepare a draft in the Methyl- 263. Cyclohexane Cyclohexanol Cyclohexanone Methylcyclohexane cyclohexanol Methylcyclohexanone Nitroethane Nitropropane Nitromethane Min reported reported that Dr. Kehoe was working on these compounds , and had re- to him that drafts had been ready before the new format had been approved Dr. Kehoe had agreed to revise the drafts in accordance with the new format but 243 as yet they had not been received 264. Acetylene Tetra Bromide Dr. von Oettingen said that he had agreed to write a standard for this substance but as yet there was no published data He felt that when the committee wrote a standard it should have informative literature available for references so that the users could judge for themselves Dr. Irish stated that they had finished work on this subject and it would be published eventually Dr. von Oettingen said he would hold up work on this substance until data had been published on it SUTO020 |G 79 237/295 mittee safe 265. Para Dichlorobenzene Dr. von Oettingen said that his subcomhad studied this substance and had thoughtthat a level of 50 ppm would be This had been suggested because a report from Dr. Irish had indicated that 70 - 80 ppm might be objectionable and might cause severe pain Dr. Irish reported that his company had done further work on this question and now believed that the maximum acceptable concentration could be set at 75 ppm Mr. McCollister reported that some of the work on this substance had been published in 1956 and that they had concluded that pain at the lower level mentioned was not significant and they now believed that 80 - 100 ppm would be the pain level and therefore believed that 75 ppm would be acceptable for a standard Dr. von Oettingen stated that his subcommittee would give this further consideration 266. Silica Min 241 The Chairman recalled the report from Dr. Drinker which been circulated to the members as 237/294 He recalled the history of | work on this subject which had begun in 1935 and which had been discussed many times since then The Secretary reported that several letters had been received commenting upon 237/294 Tovember 29 Warren A. Cook believed that this was an simplification He favored using three groups of dust similar to that in the ACGIH classification but there might be some value in limiting the dust in the 5 percent to 50 percent free silica group to 10 million particles per cubic foot He also suggested that wherever possible the percentage of free silica should be based upon the concentration of samples of atmospheric dust rather than of the parent rock November on the composition also believed that 28 Lewis J. Cralley questioned the setting of airborne levels of parent material and the large groupings in the standard He there should be a distinction between amorphous and crystaline . forms of free silica November 26 Charles R. simple rock classifications could although this had worked well for standard on silica content of the Williams did not believe that the use of two be applied generally throughout the United States New York State He also questioned basing the parent rock November 16 B.L. Vosburgh commented that some of the porcelain used by his company was in the 10 - 40 percent range and he questioned the size of the steps He suggested four steps as follows Above 50 25 - 50 - 25 Under 5 percent percent percent percent - 5 -10 -20 -50 million million million million particles particles particles particles November 13 Theodore F. Hatch did not believe that Drinker's proposal would serve for all of the silicosis problems across the country He suggested that there should be a certain amount of leeway for the application of common sense Personally he had been using four steps whereby the highest silicosis risks he tried to limit to 2 million particles for moderately high risk 5 - 10 million particles for low silicosis risk 10 - 20 million particles and for no evidence of silica he tried to keep to less than 50 million SUTO020 A fa Tid 3 Cw. we 237/295 -8- December 6 1956 November 19 Willard Machle in general concurred with Drinker's draft but believed that some silicates might be convented to free silica and therefore there might be some question in the use of the parent rock November 14 Carey P. McCord called attention to the hazards of exceedingly fine silica and that the present light field technique of counting would not include these fine particles He also commented on the wide variations within each of the two classifications November 13 F.W. Sehl suggested that threshhold limit of 5 million particles of pure from this point depending on the percentage of the committee might consider a free silica using a sliding scale free silica in the dust November 13 the composition of the commented on the large Hervey B. Elkins preferred to see the standard dust in the air rather than the parent rock jumps in the standard based on He also November 9 Manfred Bowditch was not in favor of the large steps in the standard Mr. Dooley said that he had just received five letters two of which favored the report and three which opposed it He said he would have copies of these letters sent to the secretary for the record Mr. Snell wondered what would be gained by accepting Dr. Drinker's report The Chairman thought it should be possible to develop a standard considering the fact that there was dust control going on every day He wondered what new approach the committee could take There was considerable discussion concerning the phrase parent rock in Dr. Drinker's report Dr. McCord pointed out that it was impossible to set up any standard which would prevent all silicosis Dr. McKay said that his group had been measuring quarts in city air and found that it ran 5 - 10 percent in most of their samples Dr. Cralley thought that a statement were limited to quartz on the basis of current to be given to air borne He thought it would first rather than to talk about generalities on quartz might be good but if it knowledge consideration would have be better to consider quartz at Dr. Nelson recalled that Dr. Lanza's subcommittee on this subject had be- be lieved that airborne dust should be analyzed simplification seemed unnecessary Dr. Lanta's proposal had been that a tentative standard should set up using the . light field technique of measuring as follows . exposures particles where the 5 million particles per cubic foot less than 10 microns in diameter f^,rall where the dust content was 35 percent or more free silica 10 million for dust containing 5 - 35 percent free silica and 50 million particles * dust content was less than 5 percent free silica SUTO020 } ti |fJ7 7. 237/295 + tea Upon motion by Dr. McCord seconded by Dr. Nelson it was VOTED that the committee favored the earlier reports of Dr. Lanza's subcommittee over the more recent report of Dr. Drinker The secretary was instructed to advise Dr. Drinker of this action decide what further action if any he wanted to take and let him 267. just what name where possible trade name for General Policies Min 248 There had been some discussion as to should be used for certain compounds It was generally agreed that a good sound chemical name should be used and if there was also a the same substance then this should be shown in parentheses after- wards such as Dichloromethane Methylene chloride 268. Persormel The Chairman reported that Howard Haggard had recently retired and had resigned from the committee There had been two or three other deplations from the membership Consideration was given to the addition of new members to the committee There was a general discussion of several namel Finally upon motion duly made and seconded it was VOTED that Anna M. Bastjer Eugene H. Krackow Sherman S. Pinto Frank Princi C. Boyd Shaffer Thomas L. Shipman and John A. Zapp Jr. be invited to serve as members on the 237 Sectional Committee 269. Sponsorship The Chairman recalled that the 237 Committee had sectional committee under the ASA Procedures This been organized as an autonomous but that each individual meant that the over committee did not have a sponsor standard developed by the committee had to be referred to some organization which would submit the standard to ASA for approval thus acting as an endorsing sponsor He raised a question as to whether this committee should continue as an autonomous sectional committee or whether the committee should now come under the administrative sponsorship of some national organization as sponsor for the whole project . - had been mittee had come Mr. Ainsworth recalled that when the 237 project had been initiated it decided that the best procedure to use was the autonomous sectional comThat was in 1938 and since that time several additional organizations into the picture and there had also been many other changes Mr. Bowditch suggested that it might now be satisfactory to invite the Public Health Service and the Department of Labor to sponsor this project The Chairman thought this subject was closer to the hygienic field and Mr. Schrenk suggested that the American Industrial Hygiene Association would be a good sponsor * cy SUT0020 lf Ta -10- 237/295 December 6 1956 1 - government since it cut across the whole field including government industry and insurance Mr. Cralley suggested that the American Conference of Governmental Industrial Itygienists might act as sponsor in order to give proper coordination since that organization developed its own standards Dr. McCord suggested that the Industrial Medical Association might act as a sponsor It was also suggested that the Industrial Hygiene Foundation might be in a position to serve as sponsor Upon motion duly made and seconded it was VOTED that it was the sense of this meeting that the 237 Committee should terminate its autonomous status and that a single organization should be invited to serve as sponsor for this project Upon further motion duly seconded and by secret ballot it was VOTED that the American Industrial Hygiene Association should be invited to sponsor this project It was agreed that if by chance the AIHA did not wish to accept this invitation then the Industrial Hygiene Foundation should be invited 270. Election Dr. Yant recalled that he had been chairman of the 237 Sectional Committee for about 15 years and because of the pressure of other work he had found it necessary to resign this job He had appointed a nominating committes consisting of Messrs Drinker Smyth and Bowditch to consider a slate for chairman and vice chairman Mr. Bowditch reported that the nominating committee had suggested Dr. Schrank as chairman and Dr. Irish as vice chairman There being no further duly Nelson duly seconded it was nominations from the floor upon motion by Dr. that Dr. Schrenk be elected Chairman and Dr. Irish be elected Vice Chairman of the 237 Sectional Committee Dr. Yant turned the chair over to Dr. Schrenk Mr. Bowditch moved a vote of grateful appreciation to the past chairman and this was voted wholeheartedly by all present Mr. Ainsworth recalled the years of service which Dr. Yant had given to the committee and expressed the great appreciation of the ASA for all he had done . Adjournment The meeting adjourned at p.m. HGL NP HuS. r Secrey tary . Henry G. Lamb Secretary Sectional Committee 237 2-28-56 es oa SUT0020 (5 - INCORP TED 70 East forty Street = New York 17 N. ASA November 8 1956 To the Members of Sectional Committee Z37 Silica Dust Gentlemen Committee Concentra- the You will recall that a Subcommittee on Maximum Acceptable tion of Silica Dust has been headed by Philip Drinker By letter or January he has asked for an expression of opinion from the members Z37 concerning the following proposal for Section Section 3 1 Acceptable Concentration 3.1 The acceptable concentration of silica dust in air breathed shall not exceed 5 million particies per cubic foot if the free silica content of the parent rock or dust source contains 10 or more of free silica The acceptable concentration shall not exceed 50 million if the parent material contains less than 10 free silica In his letter Mr. Drinker recalls that this draft departs from the usual silica standard such as the U.S. Public Health Service or the American Conference of Governmental Industrial Hygienists by coming out and making two simple rock classes cne above and the other below 10 free silica in the parent rock Mr. Drinker has taken this idea : from the New York State codes Will the members please advise the secretary of any have concerning this proposal Unquestionably this furtner discussion at the meeting of December 6 comments they may will come up for Very truly yours HGL CC Alternates Organizations Henry G. Lamb Secretary Sectional Committee 237 SUTO020' AMERICAN STANDARD ASSOCIATION INCORPORATED 70 East Forty Street New York 17 N. SSA 19/90 NOT FOR PUBLICATION AINOTES ASA Sectional Committee on Safety Code , f for Exhaust Systems 29 SS December 1957 Subject to Confirmation The meeting was called to order at 10:10 a.m. by the Chairman dr Arthur 3. Stern in Room 5928 of the Grand Central Terminal Building New York City fembers Present Stern Arthur C. Robinson K.E. Albisser Robert Jaken Sydney Brown Hylton R. Jurke Frank - Chairman Vice Chairman H. ASME NSC MCA USN USBM CIO McDaniel P.W. Peeps J.J. Tracy .E Vedder 4.0 Weber Herbert J. Others Present TAA NSFFEA AMCA FOMA AFS indresen V. Caplan Knowlton Lamb Henry G. - alternate for National Safety Council J. - Chairman Subcommittee on Fundamentals Acting Secretary Sectional Committee 29 - ASA Staff Xembers Absent Califf Jack Jarnes K.H. Branat A.D DuBruq R.C. ' Fidelius W.R. Carlock N.B. Gleason R.P. ACGIH IAGLO MatL AIHA APHA HMA AES NPVIA ASSE Greenburg Leonard Griffin A.G. Hatch T.F. Hosey A.D. > Liaison houghton J.A Sheeran C. Silverman Leslie Stratton Reuel C Wallace W.M. MatL USBLS MatL USFHS ) NAMOC FA , MatL ACSC ( ASHAE ites 5 Approval of Minutes of the meeting of December , M^n25` The Secretary 1955 had been circulated tions or additions had been received reported that as 29/85 No the mincorres- Upon motion by Mr. Albisser seconded by Mr. Andresen it was OTED that the minutes of the Decmber December , 1955 meeting on approved as circulated SUTO020 i | ad In ~~ 0990 0990 Taramer ? 1957 36. recalled that Subcommittee for some time on Solid Matema Sanasing donn Kane nad teen 6. Men it). The Kanwar 00 oln.s Shee anc had finally lieved that reported that neither he nor the other it was practical to develop a standard members on this of 7_3 SibcommitteSibcoe m it e bes 3uc8tt nad 19- signed as chairman and Mr. Richard Dennis of the Harvard School of Public Health had been appointed as chairman 4 vee.Ps out apparently nothing had been done since thar Mr. Brown recalled that Regulations for the Installation of Blower and Exhaust Systems for Dust Stock na Yador Removal NFFA 91 BFU 91 had caen 15mitted to the American Standards Association inder the Existing Standards Metnia and had been approved as American Standard 213,1-1950 He was interested in the relationsnip of this document to the work of the 29 Sectional Committee It was stated that the NFPA document had been concerned with those features of exhaust systems which might propagate did not seem to be any actual fire from one part of a overlap between the work cuilding of the to another and there NFPA Committee and the 19 Sectional Committee Inere did however appear to be enough mutual interest between these two committees so that the Chairman asked Mr. Brown if he would act us lisison man between these two of them Mr. Brown accepted Col7b29 since he was already a member of born After considerable frtner 11scussion and without formal vote it was ananimously agreed that the Subcommittse ... ...Sa... Sa Material Handling snowd ce timed on the basis that there was a need for such a standard non- It was realized that the work of most of the subcommit ses under this project depended very largely upon the interes energy am effectiveness of tra chairmen of the subcommittees and there wad some question as To who might be chairman of this particular subcommist ubcomite tsubceommiettee wn The fiture After further 4531 Ar Robinson was asked to conta Mr. Alex Granarn of the National Engineering Company in Chicago and ask nom i re would be willing to ce crairman of this subcom- mittes ll of the members of the 23 Sectional to consider possible members of this such membership to the se.retary surcommittee Committee to were urgently requested their suggestions for 37 Subcommittee on Surface Surface Coating Opera Min So, The Scary reported that ne had telepached the s,, airmanthes lant mmittee Doctor Leila Silverman of the Harvard 3 noci of Putt Health 1 7 " Si verman *c-ld new atrend this meeting ne also tion to this meeting could not ils suc Complete -he work of his = m 28 for presenta- e nadonsidered nadonsidered severa orals and with a certain amount of work on the part of the chairman he would protably be in a tion to submit a draft for consideration of ne Z3 So mmittee that 08 W ->.1 1 to worK ON The Secretary was requested to write to Detox : complete the work of his subcommittee Sliverman and urge 351_2lment 351_2lment nim to 8 Subcommittee R fr Lapointe had been appointed .+ there was not even a se subcoMPULS organized .. e nad *, 0 The Oatman rei_ resigned ofc he present 73 me "2,3 Sul i 22 22 bild ce 36 FL SUTO020 3< 39/90 December ~ 1357 with operations such as the coating of cardboard .. eun facture of artificial leather No member present had any suggestions sugestions might have the interest to carry on the work of this subcommittee time and the manto whe present After further discussion upon motion by Mr. - seconded c7 Mr Weber VOTED that the 29 Sectional Committee would postpone work " the subject of roller coating for the time being 19. Subcommittee on Abrasive Blasting Operations Min 1. recalled that Mr. Barnes nad teen chairman of this subcommittee out ^ committee had been formed but no meetings of the subcommittee cad The Chairman had resigned been ned Without a formal vote it was agreed that the work of this subcommittee should be continued It was agreed that Mr. Vedder should be invited to serve as chairman ch this subcommittee Corations 40 Subcommittee on Mechanical Cutting and Abrading The Secretary reported that he had telephonea to Mr. Tack Bachairman Man 28 Bachairman of the subcommittee Mr. Baliff had seen unable to attend this meeting meeting de nad a130 ad- rised that due to changes within his own department he was now finding it difficilt to carry on effectively the work of this subcommittee His subcommittee nad neid one meeting some time ago but more recently had been inactive Mr. Weber had been a member of the subcommittee and was quite familiar with this subject Upon invitation by the Chairman Mr. Weber pted chairmanship of this subcommittee All members of the 29 Sectional Committee are urged to send to Mr. Weber suggestions of those who they believe would be able to help in the work of this subcommittee of Surface 1. Subcommittee on Ventilation and Operation Oper Talin , 29.1 Min 27 The Chairman recalled that he had asked Mr. Hoverman to serve as chairman of a subcommittee to review the American Standard Safety Cide for Ventila- tion and Operation of Surface Tanks Z9.1-1951 Mr. Boermar had since had a change in his duties and had resigned as chairman of this succommit'sus ccommeit'se Mr. Robinson thought that ore way to namie this work would be to send copies this standard to about half a dozen people who were definitely interested in this standard and ask if they had any suggestions for vv ion in the andard at this time He suggested George Hama Jim Barrett and ETA Balf who recr~ sented governmental agencies and some people within the inst In 1 carry out this work it would be necessary to have an acti airman cr this sub- Committee Upon inv tion from the Chairman Mr. Anarssen en to be harmar of this subcommittee 42. Subcommittee on Fundamentals Min 10 Mr. bar bar as airman of this subcommittee nad recently provided multilith plates 1 a raft These mad been duplicated in the offices of the ASA Z9 39 a cobles We 11stributed to those present at the meeting SUTO020 |. ha: t ~ncead -4- -4- 39/90 December 6 1957 Mr. Caplan reported that his subcommittee nad questioned ject of Fundamentals should be the scientific fundamentals or the mentals The Committee nad decided that the most useful document whether the subpracticing fundawould be the practicing fundamentals and the members had developed this draft on that basis The part beginning on page o was the tables and illustrations which would be appendix material The appendix materia snown in this particular draft was merely illustrative of the material which would be put in the appendix out there probat y would be several changes cetween the present draft and the final document This document had only been been no opportunity to duplicated a couple days before the meeting send copies to the members in advance of the and there meeting naa Mr. Caplan therefore asked the committee merely to consider the document on a general basis rather than to be concerned with individual wording of individual paragraphs It was recalled that this draft now nad sections on the following =. 1 sil. 17 J, 71 TII VIII 1 Scope and Definitions Plant Construction and Exhaust Hoods Layout Exhaust Ducta Air Cleaning Flant Exhausters Construction and Installation Operation and Maintenance Checking Operation of Local Exhaust Systems Hthout formal vote the committee agreed that all of these nine sections were appropriate and that Mr. Caplan and his subcommittee had done an excellent job on the development of this fundamental information Section I was reviewed more or less in detail On Section II Mr. Tracy stated that he was very happy to see information included there or Make Air Mr. Burke stated that he believed such as this draft on Fundamentals and ne its early completior that there noped that was the a real need for a document committee would work toward After considerable Jeconded it was further discussion upon motion by Mr. Robinson quly VOTED that it was the sense of this meeting that 1 the draft 29/89 should be referred to all members and Alternates of the 29 Sectional Committee for comments 2 a deadline should be set up on the basis of two mo 73 from the time that the copies are sent out 3 the comments should be sent to Mr. Knowlton J. Calm as chairman of the subcommittee are of Mallinckroat- Tranum Division P.O. Box ui2 St. Charles Maryland eto SUTO020 Pe -5- 09/90 December 6 1957 4 Mr. Caplan and his subcommittee should review the ' comments received should prepare a revised craft and send the revised draft to the Secretary of the 29 Sec- tional Committee and 5 the Secretary upon receipt of this draft was au- thorized to send the draft to final letter ballot action of the Z9 Sectional Committee without further meeting of this committee for cussion waiting for purposes of any dis- 43. General Policies Min 33 Mr. Burke was disturbed at the number of subcommittees which had not produced any tangiole results since the last meeting or this sectional committee two years ago He wondered if the trouble was that each chairman of the subcommittee had been permitted to point his own subcommittee da suggested that the Z9 Sectional Committee appoint all of the members of the subcommittees The Chairman remarked that in the work as presently laid out a great deal of responsibility devolved upon the chairman of the subcommittee He recalled that on the Subcommittee on Abrasive Blasting Operations the complete personnel or the subcommittee had been established and reported two years ago out because the chairman had resigned no one had called a meeting of this subcommittee and no work had been done He believed that the real key to future activity was in obtaining interested and aggressive chairmen of these subcommittees in order that they would call meetings of the subcommittee and get the various members to prepare material for future standards Mr. Andresen asked as to whether any work had ever been done on ventilation in the chemical industry The Chairman reported that several years ago a special subcommittee had been set up to plan a program of work This subcommittee had made a formal report dated May 4 1948 which had been on the basis of developing standards for processes rather than for individual industries It was hoped that a standard for a given process would be effective in any industry concerned with that process and that the work would develop more effectively on that basis rather than to have a single standard for instance for the chemical industry In line with this arrangement the report of May 4 1948 had included a recommendation that at sometime a subcommittee should be initiated on the subject of chemical processes such as reacting filtering centrifuging distilling and other similar operations Mr. Andresen was happy to know that such a subject had been given consideration and agreed that no new subcommittee on this particular subject should be initiated initiated at this time The Chairman recalled that the present officers of the had been in office for some time and he suggested that perhaps so change in the officers sectional committee there should be Joon motion by Mr. Burke seconded by Mr. Weber it was unanimously VOTED that the present officers namely Mr. A.C. Stern as ' Chairman Mr. K.E. Robinson as Vice Chairman and Mr. Henry G. Lamb as Acting Secretary ce elected SUTO020 aT d thd 7 7 hy \] ee 29/90 ; ode December 6 1957 The Chairman recalled that at the present time there were four memberslarge on this committee Mr. K.H. Barnes Doctor Leonard Greenburg Professor Theodore F. Hatch and Doctor Leslie Silverman Without formal motion it was agreed that Messrs Hatch and Silverman should be continued as members The committee suggested that letters be sent to Doctor Leonard Greenburg ana to Mr. K.H. Barnes asking if they were still active enough in the field of ventilation and if they had sufficient interest in this work to continue as members large on this committee pon motion duly made and seconded it was 7OTED that Mr. Knowlton J. as a member Caplan be invited to on this committee serve Ar Caplan accepted adjournment The meeting adjourned at 3:10 p.m. subject to the call or JOL NF 12-12-57 Hovery 3. Lamb Ienry G.'Lamb G.'Lamb Secretary Cactional Committee 29 SUTO020 i thakuj male