Document JN5NDRm7rLyOMNqEYOaeYqjJv

FILE NAME: Dow Chemical (DOW) DATE: 1958 Apr DOC#: DOWOIO DOCUMENT DESCRIPTION: AIHA Journal with Asbestos Standard AMERICAN Industrial Hygiene association Volume 19 APRIL 1958 Number 2 T he C ontrol of a L ead H azard in th e S ilver sm ith in g Industry .. Leonard D. Pagnotto and Harold Bavley I nstrument Developments in H ealth P hysics..................................... F. E. Adley Studies on the T oxicity of ii-Propyl N itrate Vapor......................................... SO W illiam E . R inehart, Robert C. Garbers, Earle A . Greene and Robert M . Stoujer Noise Exposure Evaluation........................................................................................ 84 Edward W. Poth and Carl J . Weinberg (with a C ritique by K. C. Stewart) T he T oxicology of an Aniline-Furfuryl Alcohol-Hydrazine Vapor Mixture 91 Keith H . Jacobson, W illiam E. Rinehart, Henry J . Wheelwright Jr., M artin A. Ross, Jackie L. P a p in , Robert C. D aly, Earle .4. Greene and W illiam A. Groff N uclear Safety and I ndustrial H ygiene in the F abrication of N uclear F uel E lements............................ H'. B. H a m s and L . R. Solon ............................................... The E ffectiveness of Sand as a F ilter Medium........................................... R. E. Yoder and F. M . Empson 197 C r iter ia for E st a bl ish in g S hort T erm P e r m issib l e I n g estio n of F allout Material................. .......................... . ................................................................. m Gordon M . D unning * C u r r e n t P r o b l e m s i n t h e F ie l d o f R e s p ir a t o r y P r o t e c t io n ....................................... 121 E. C. Hyalt R espirator P roblems in Atomic E nergy P ractice................................................. 123 G. W. C. T a il and T . H . Byington A D iscussion of the Bureau of Mines Approval Schedules for R espiratory Protective De v ic e s.................................................................................................... 126 S. J . Pearce A Comparison of Performance Standards and T ests Specified by B ureau of Mines Schedule 14F and by the Chemical Corps for the M9A1 Mask . . 130 Gerald J . Fleming R espiratory P rotection Equipment Developments by the U. S. Army Chem ical Corps...................................................................................................................... 140 A llan L. West T he R espirator P roblem--anI ndustrial H ygienist's Vie w p o in t .................... 149 Harry S. Jordan H ygienic Guides Series............................................................................................... 154 N ews o f Local Sections............................................................................................. 164 American I ndustrial Hygiene Association J ourn al, published bi-monthly for the American Industrial Hygiene Associa tion. Dohrman H. Byers, Editor: Jack C. Radcliffe, Associate Editor; Lloyd E. Cordon, -Vetos Editor. Editorial Offices, 1014 Broadway, Cincinnati 2, Ohio. Subscription 41-50 per year in the United States; 47.75 per year in Canada; 48.25 per year in alt other foreign countries. Single copies $1.50. 6 Copyright, 1058, by The Williams St Willdna Co. Entered us second class matter at the post office at Baltimore, Md. The American Industrial Hygiene Association Journal reserves the right to edit all advertisements and to refuse advertising copy when it does not meet the high standards adopted by the Associa tion. " ? EdX-HIjBI'Tj I PLAINTIFF'S o S I I Industrial Hygiene Journal C RECOMMENDED CONTROL PRO CEDURES: To prevent exposure to high concentrations of amorphous silica dust, process ventilation and/or en closure are the best_ means of control. For some operations a dust respirator approved by the U. S. Bureau of Mines may be satisfactory. IV. Specific Procedures A. FIR ST AID: None. B. SPECIAL MEDICAL PROCEDURES: (1) Preplacement: Clinical and chest radiographic examinations should be made on all persons prior to job assignment. (21 Periodic: Since there is only lim ited information about the harmful effects of amorphous silica in in dustry, exposed personnel should have careful periodic medical ex aminations, including chest x-ray. Pulmonary function testing may be useful. (3) Treatm ent: No satisfactory treat ment other than removal from ex posure, and therapy for any com plicating infection. GI V. Literature References 1. Cooper, W. C., et al: Industrial Hy giene Foundation Transaction Bulletin No. 3 0 ,1S2-194. 2. D r in k e r , P. vxd H a tch, T.: Industrial Dust. McGraw-Hill Co., Inc. New York, 1954. 3. F raser, D. A .: AM A Arch, of bid. Hyg and Occ. Med., S : 412, 1953. ' 4. Lv m bie, J. S.: Ind. Med.. 7: 470,193S. 5. P alicard, A . and C o llet, A .: AAL4 Arch, of Ind. Hyg. and Occ. Med., 9: 3S9, 1954. 6. Sc h e pe r s, G. W. H., et al: AM A Arch, of Ind. Health, IS: 125, 1957; ibid, 16: 203, 1957; ibid, 16: 280, 1957: ibid. 16: 363, 1957; ibid, 16: 499, 1957. 7. S mart, R. H. and An d e r s o n , W . M.: bid. Med. and Surg., 21: 509, 1952. 8. T e b b e n s, B. D. and B eard, R. R.: AM A Arch. bid. Health. 16: 55,195". 9. U. S. Public Health Service; California Department of Public Health; Nevada State Health Department; Oregon State Board of Health: Progress Report of Study of Pneumoconiosis Hazards in the Diatomite Processing Industry. 1955. Asbestos I. Hvgier.ic Standards A.' RECOM M ENDED MAXIMUM AT MOSPHERIC CONCENTRATION (8 hours): 5 million particles per cubic foot of air (M PPC F).1 (1) Basis for Recommendation: Experi ence in industry/ *' *' " and ani mal experiments.1, ' B. SEVERITY OF HAZARDS: (1) Health: Long continued inhalation of asbestos dust results in a form of pneumoconiosis known as asbesto?i>. The primary effect of inhala tion is an interstitial pulmonary fibrosis. The disease is characterized by asbestos bodies in the lungs and sputum. Based op roentgenological examinations, asbestosis can be clas sified as minimal, moderate, and advanced. It is a serious disease in some instances, but more frequently it remains nondisabling for many years, even without appreciable symptoms, as long a? some other serious disease does not supervene to cause death.* Chief symptoms of advanced asbestosis are variable cough, dyspnea, substernal chest pains, decreased chest expansion, weakness, emaciation, clubbed fin ger tips, and curved fingernails. Any appreciable decrease in the amount of asbestos dust in the breathing atmosphere will cause a decrease in the incidence and severity of asbestosis. Individual suceptibilitv varies.* There have been reports of an increased incidence of lung can cer in person;- with asbestosis.3 (2) Fire: None. C.SHORT EXPOSURE TOLERANCE: Not applicable; II. Significant Properties A fibrous magnesium calcium silicate which occurs in various combinations as white, greyish or greenish masses, either compact or of long silky fibers, flax-like and readily separated. About 95% of commerical asbes tos is chrysotile, which is derived from serpentine, and is n hydrous magnesium 162 silicate containing from 12 to 14 per cent water of crystallization. III. Industrial Hygiene Practice A. RECOGNITION: The spinning and weaving of asbestos, in combination with other textiles for fire proof and heat resistant cloth, results in dust exposure. I t may be used by itself or combined with other materials for valve packings, gaskets, boiler lagging and pipe cover ing, protective clothing, shielding ma terials, and as automotive brake linings. In the building industry it is used in the manufacture of asbestos cement products, heat insulating, and fire proofing materials. B. EVALUATION OF EXPOSURES: As bestos dust may be sampled with the electrostatic precipitator or by the unpinger methed using alcohol or alcohol and water, as the collecting medium,*'* and dust counts made by the standard light field technique.* The recommended marimnm atmospheric concentration of 5 M PPCF is bared upon the impinger sampling procedure. C. RECOMMENDED CONTROL PRO CEDURES: Prevention of asbestosis depends entirely upon preventing ex posure to concentrations of dust suffi ciently high to produce the characteris tic reaction. Enclosure ot local exhaust ventilation are the principal means of dust control. U. S. Bureau of Mines ap proved dust respirators may be worn as protection for some operations. IV. Specific Procedures A. FIRST A ID : None. B. SPECIAL MEDICAL PROCEDURES: (1) Preplacement: Clinical and radio graphic chest examinations prior to job assignment. (2) Periodic: Exposed personnel should April, 1958 have periodic clinical examinations for signs and symptoms of asbes tosis. These should include exami nation of the sputum for asbestosis bodies, and chest x-rays of good quality. (31 Treatm ent: No satisfactory treat ment other than removal from ex posure and therapy for any com plicating infection. V. Literature References 1. American Conference of Governmental Industrial Hygienists: AM A Arch, oj I n i. Health, 16: 261, 1957. 2. C artier, P a u l ; A M A Arch, o) Ind. Health, 11: 204, 1955. 3. D oll, R .: Brit. J. Ind. Med., IS: 8, 1955. 4. D r e e se n , W. C., et &1: Public Health Bulletin No. 241, Supt. of D oc, Wash ington, D . C , 1938. 5. D r in k er , P . and H atch, T.: Industrial Dust. McGraw-Hill Book C o, In c , New York, 1954. 6 . F airhall, L awrence T .: Industrial Toxicology. The Williams & Wilkins C o , Baltimore, A id, 1957. 7. Kino, E. J, et al: Thorox I, p. 188, 1946. S. Lynch, 2L M .: A M A Arch, of Ind. Health, 11; 185, 1955. 9. McPheeters, S. B.: J . Ind. Hyg. & Tax., 18 : 229, 1936. 10. P ace, R . T . a n d B loomfield, J. J .; Pub. Health Repts. 5S: 1713, 1937. 11. Patty, F rank A .: Industrial Hygiene and Toxicology, Vol. 1. Interscience Publishers, In c , New York, 1948. 12. Smith, K. W , A M A Arch, of Ind. Health, IS: 198, 1955. 13. Vorwald, A. J , et al: A M A Arch. Ind. Hyg. and Occup. Med. S: 1, 1951. Because oj space limitations, it is impossible to list all methods of exposure evaluation. The selections have been made on the basis of current usage, reliability, and applicability to the usual industrial type of exposure. Any specific evaluation and/or control problem will involve professional judgment. This can best be done by professional industrial hy giene personnel. Respiratory protective devices are commercially available. Their u , however, should be confined to emergency or intermittent exposures and not relied upon as primary means oj hazard control. A relative scale is used or rating the severity of hazards; nil, low, moderate, high, and extra hazardous.