Document 70JQybzvX6ngXZjGEvxxQZygE

RULES AND REGULATIONS COMMONWEALTH OF PENNSYLVANIA DEPARTMENT OF HEALTH ' CHAPTER 4 Article 432 Regulations Establishing Threshold Limits in Places of Employment .Under llie proviMious* of the Administrative Code Act or April 9. 1929. I'.I-- 177 the following Rules and Regu hit ions of the Department of Health are hereby amended this l8lh day of August, 196-1- Seclxon 3, paragraph J, is amended to read as foliovs: J. 'Threshold Limit Value" shall mean the maxi mum average atmospheric concentration of con taminant to which workers may be exposed for an eight hour working day. (These values are set forth in Tabic 1 hereof, which tabic is a part of these regulations.) Section 3 is amended by adding a new paragraph, *'L", as follows: L. "Short-Term Limit" shall mean the maximum atmospheric concentration of a contaminant to which a workman may be exposed for a specified ahort-iime period. The concentration represents an upper limit of exposure for the specified time and assumes that there are sufficient recovery periods between episodes for recuperation. The daily average exposure to the contaminant, including these_cpisodcs, shall be such that the threshold limit value set forth in Table 1 shall not be exceeded. (These values arc set forth in Tabic 2 hereof, which table is a part of these regulations.) The title and paragraph A of Section 5 ate amended to read as follows: Section 5. Threshold Limit Values ami Shorl-Term Limits imn-Cl.. ;-t\2 (Revised Aug. 18, lOM) A. No employee shall be exposed to atmospheric concentrations of contaminants which conecntra tions may give rise to occupational disease Tables 1 and 2 shall be used for the determiaa lion of permissible levels. Table 1 (Supplement 1964) Tbe following Threshold Limit Values as con tained in Table 1 are hereby changed to tead a: follows: Substance Dimethylformamide--Skin Hydrogen sulfide Methyl mercaptan Nitric acid Phosgene Selenium compounds (as Sc) Yttrium S-hour maximum average exposure. Mg. per1 P.P.M.* Cu.M. 10 10 10 2 0.1 -- -- -- -- -- -- 0.2 1 The following Threshold Limit Values are hereby added to Tabic 1: -" . - Substance tert. Butyl chromate (as Cr03)--Skin Camplior PLAINTIFF'S EXHIBIT W1-QQ3&1 8-hour maximum average exposure P.P.M. * Mg. pet' Cu. M. -- 0.1 --2 ufcoN/iKurc PLAINTIFF'S EXHIBIT ftftQCn.eOl * Tabic I. (Continued) Substance 8-hour imaximum average exposure Mg. pcrk P.P.M. * Cu. M. T)I)VP (o,o*Dimcthy!-2,2dichlorovinyl phosphate) . -- Endrin (1,2,3.4,10,10-hcxachloro-6,7*cpox)'* 1,4,4a, 5, 6,7,S,Sa*octa hydro-1,4,endo*5,8*dimethanonaphthalene) -Skin -- Heptachlor (l,4,5,6,7,8,8a-hepta- chloro-3a,4,7,7a-tctrahydro- 4,7-roethanoindcne) -- Oil mist (mineral) - 1 0.1 0.5 5 "Parts of vapor or gas per million parrs of air by volume at 25C and 760 mm. Hg. pressure. ^Milligrams of dust, fume, or mist per cubic meter of air. Tbe following new Table 2 is added: Substance Maximum average exposure for the time period specified Mg. perk Time in P.P.M. * ' Cu. M. minutes Acetic acid - 40 Ammonia 100 Amyl acetate 200 Beryllium -- ' Boron trifluoride 1 Bromine 0.4 Butyl acetate 300 Butylamine 5 Carbon tetrachloride . 25 Chlorine 3 Chlorine trifluoridc 0.1 Chloroacetaldehyde 1 _ -- -- 0.025 -- -- -- -- -- -- -- -- 5 30 30 5 5 30 30 5 30 5 5 5 Substance Maximum average exposure for the time period specified Mg. per1* Time in P.P.M. Cu. M. minutes Chloroform 400 Cyanide (as'CN) -- 1,1-Dichloroethnnc ' 200 Dichloroethy! ether Diglycidyl ether 35 0.5 Ethyl benzene '200 Ethylene glycol dinitrate and * Nitroglycerin Fluoride 0.2 -- Formaldehyde Hexonc (MICK) 5 400 Hydrazine 1 Hydrogen chloride .5 Hydrogen sulfide 20 Iodine 0.1 Methyl acetate 400 . Methyl chloroform (1,1,1-trichIoto- ethane) 1,500 Methyl mercaptan 20 Nitrogen dioxide 25 Ozone 1 Perchloroethylcne 200 Selenium compounds (as Se) -- Sulfur dioxide 20 Sulfuric acid -- ToIylene-2,4-di iso cyanate (TDI) 0.02 Trichloroethylene Vinyl chloride 200 500 -- .5 -- -- -- '-- ' 30 30 ' 30 30 5 30 -- 10 -- -- -- -- -- 30 30 5 5 30 5 5 5 5 -- -- -- -- 0.3 3. ` - 5 5 '5 30 30 . 30 . 5 5 5 30 *5 . Parts of vapor or gas per million parts of air by volume at 25* C and 760 mm. Hg. pressure.' ^Milligrams of particulate per cubic meter of air. ^. ' 2 ` IMID-Cli.-I* i 12 (lvvvi.sj.il Aiig. IS, I*y6 COMMONWEALTH OF rEHNSTLVAKIA DEPARTMENT OF HEALTH DtVISlOH Or OCCUPATIONAL HEALTH HTClEniC I.TFOnOATIOM GUIDE HO. ? ASUKSTOS PROPERTIES; Aikcitoi li composed of A cumber of different mineral* which it* silicates of variable composition, but basically are of a form ot hydrous magnesium silicate. Their chief characteristic is a structure composed of long, parallel, flexible fibers, capable of repeated longitudinal subdivision. Many varieties arc sufficiently flexible to be spun Into yarn or woven e modified textile machinery. Manufacturing processes can cause this min eral to break up into many minute particle*. THRESHOLD LIMIT VALUE (acceptable atmospheric concentration for * *-bour work period): 5 million particles per cubic foot of air. . ..... MEDICAL ASPECTS: * '' 'Long continued inhalation of nabestos dual may result in n form of pneumoconiosis known as nsbestosls. The primary effect of such Inhalation Is n condition ot pulmonary fibrosis. A characteristic finding of asbestosis is tho presence of asbestos "bodies'* in the lungs and sputum. Complete roentgenologic study of the chest and histopathological findings are necessa: to establish tbc presence of this disease. The question of whether or not there is any relationship between the inhalation of asbestos dust and cancer of the lung ie still under discussion but more and more evidence is accumu lating that exposure to asbestos libera may cause cancer of the lung. PREVENTION: a. Preplacement: Occupational history is a neces sity. A compieti physical examination, including a chest x-ray. should be emphasised. b. Periodic Examination: A physical examination, together with a chest x-ray film, should be given about once a year. Cases wh> pathologic lung changes have occurred should be relocated from employment in dusty operations. EXPOSURE CONTROL: a. All dust-producing operstions should be equipped with local ex haust ventilation. Where possible, isolation or segregation of t operation should be observed, together with the use of wet raeth Housekeeping should be maintained with a view to preventing an' accumulation of deposited dust. 'Vacuum methods of cleaning ar preferred, and should be performed ,,off-shif:`,or when least exposure to plant personnel would occur. C. Where other methods of control are no: feasible, dust respirato of a type approved by the U.S. Bureau of Mines for protection . against pr.eumoconios is-producing dusts, should be supplied to those employees subjected to the dusty atmosphere. ' 4. * periodic determination of the dint level* of tin plant tlmos r-jld be made to aaccrtiin the efficiency of the control met U **. - nm - H1H-19041 P Rev. 7/64 cckscimealth of Pennsylvania, OF.PAP.TUEKT OF HEALTH DIVISION OF OCCUPATIONAL HEALTH HTCILMC iriFO.TUATIW CUIDE FO. 77 rnt'uN.u. r.nsnit.vruuY i-mmirrivi: ihji-m-munt Thi guide is prcitnitd as a summary of general information esnccrning personal respiratory protectivo equipment. OTHER PUBLISHED INFORMATION: Many comprehensive publications art available on the subject ot respiratory protective equipment. These include: 1. ASA Code tor Head. Eye and Respiratory Protection Z 2. 1-1959. - - ~ Amerieon Standards Association. 10 East 40th Street. Ntw Tork. . 2.- Respiratory Protective Equipment. Bulletin 226. U.S. Depart ment ot Labor. Bureau of Labor Standards, Washington. D.C. ' 3. .Respiratory Protectivo Devices Manual. Braun, and Brumfield, Inc.. Box 1203, Ann Arbor, Michigan. 4. Respiratory Protective Devices Approved by the Bureau at Mlaea. U.S. Department ot th- Interior. Washington, D.C. 5. Respiratory Devices for Protection Against Inhalation ot Dust, Mists, and Lour Vapor Concentrations of Certain Pesticides. Agricultural Research Service. U.S. Department ot Agriculture. Washington. D.C. USE AS A CONTROL MEASURE: Personal respiratory protective devices should never be substituted for effective engineering control of airborne contaminants. They ahould be Considered an interim mechanism until more effective control is Installed. At best, they should be used as a last resort for protection of the individual workman. There are certain circumstances where it is neither economical nor practical to control a hazard beyond the use of personal respiratory pro tection. These situations are generally of an intermittent nature, however, and rarely extend throughout an entire workday^ Examples include: the ad justment of valves in a contaminated atmosphere: the periodic machining el certain highly toxic materials; the cleaning of vibrating screens; and miscel laneous. infrequently recurring maintenance operations. The cost of re ducing the concentration of contaminants in these operations or areas to acceptable levels would be prohibitive and the actual exposure time is gensrally of short duration. It is recognized also that respiratory protectivo equipment ie an important adjunct to primary control measures. In general, personal respiratory equipment is designed for a specific purpose and should be used only for the purpose for which it is intended. It interposes a barrier between the man and his environment insofar as air contaminants arc concerned. . Such equipment consists of gas masks T '' `tut. t ) L. r i mechanical filters, chemical cartridges, supplied nir-tine masks, eetfccntainrd air lupplici, hose mask*, and combination* of these. Vill*- v. pan mash and chemical cartridge tvpr respirators 3 re not fur me there is a itffn itntv of nwci in the air. There arc also limit* *f contam ination, above which the cliicicncy o! a respirator is not capable of pro tecting the wearer. These limits are specified by the manufacturer, for example, "not be used in atmospheres containing more than 0.1 per cent Contaminant by volume". Also, If a contaminant is capable of being ab sorbed through the akin, adequate protection of the workman may require the use of-protective clothing including complete suits. In addition to res piratory protective devices. TYPES OF EQUIPMENT: Based on (ho function of the equipment, these devices may be grouped aa air-purifying and atmosphere-supplying respirators. -- .Air-purifying respirators Include: * - ---- MECHANICAL FILTERS - These units generally consist of a face-piece and a filter. They sre designed to remove dispersoids from the air. Most fil ters may be used only once snd must be discarded when particulate builds up. Some, however, may bo "blown free" and reused. Detergents, soaps and solvents destroy the properties of the filter; consequently, the manufac : turer's instructions concerning cleaning should bo followed. Tba U.S. Bureau of Klines approves filtcre for protection against pneumoconiosis-producing and nuisance dusts and certain fumes aad mists. CHEMICAL CARTRIDGES - These units are designed to remove gases snd vapors from the air within certain limits. A small amount of sorbeat ia present in the cartridge. The sorbent varies with the type of gas and vapor and muat be effective for the specific contaminant. CAS MASKS - These units are equipped with a canister o( oibents fitted to a full facs-picec which covers the eyes, nose and mouth. The canisters are color-coded for specific application to a particular contaminant or combina tion of contaminants. Surplus military gas masks are not designed for in- . dustrial use. MOUTHPIECE RESPIRATORS - These units arc single cartridges with a nose clip to prevent breathing through the Bose. They are designed primar ily to permit escape from a contaminated atmosphere during an emergency situation. Atmosphere-supplying respirators include: HOSE MASKS - These units are used for respiratory protection in any at mosphere provided that enough air is supplied to the wearer. They may be equipped with or without blowers. The blower should supply fresh, uocontammated air, free of oil mist and toxic gassa. AIR - LIN E RESPIRATORS - These units are used in any atmosphere not immediately hazardous to life. Compressed air Is fed to the mask in two types d supply, continuous flow and demand flow. Aa with the hose mask, the compressed air supply should be uncontaminated. Abrasive blasting respirators and supplied air hoc-ds and suits are variations of airrline res pirators. N )  plitd air-line mVi, idlolnation* of three. Filter.- J2> or* are nnt for m wl.en are also limit* of conUm* ftr -tor not capable of prol .ified by the manufacturer, for itaining more than 0. 1 per cent mutant is capable of being abion of the workman may require mplete suits, in addition to ree- !' -nent, these devices may be grouped 2 respirators. i * rally consist of a face-pisce and tnerseids from the air. Most fil1.carded when particulate builds | ' and reused. Detergcote, soaps filter; consequently, the maaulachould be followed. * filters for protection against -its and certain fumes and mists. re designed to remove gaees and A small amount of sorbent is -es with the type of gss aid vapor -eiinant. A a canister of sorbents fitted to f. ~i mouth. The canisters are \T contaminant or combina- > n. -a are not designed for in- are single cartridges with a _os*. They are designed primartmoiphtrs durirg an emergency include: ^splratory protection In any atird to the wearer. They may be >er ehould supply fresb. unconi es. - need in any atmosphere not f sir Is fed to the mask in two i flow. As with the hose mask, iminated. Abrasive blasting ' are variations of air-line res- ------ 1 SELF-CONTAINED BREATHDfCI APPARATUS - Such a unit is similar to `an air-line respirator except that the air or oxygen supply is from a cyl inder carried by the wearer. The supply of air or oxygen is limited, and the apparatus is heavier and bulkier, but greater mobility over greater' distance is possible with these onits. In general, use of these units re quires that the user be well trained in their operation and be in excellent physical condition. PROGRAM: *. The chief complaint concerning the uee of respiratory protective de- vicee Is that of discomfort. Fit is important for two reasons. First, the device fnils if a tight fit is not maintained between the face-piece and the wcarer'e face. Second,, poorly fitting respirators become intolerable to the wearer. - The selection of the proper device should be the responsibility of a trained person who bovi the extent of the hazard, the limitations of various types of respirators and the conditions under which the devices will be used. Workmen who use respirators should receive thorough instruction In cluding the operating principles of the devices and their limitations, adjust ment and fit, and when and where they are to be used. After instruction, supervision over the use of respirators is mandatory. All respiratory equipment should be maintained in a dean and sani' tary condition. It should be periodically cleaned, sterilized and inspected. Respirators should not be passrd from one man to another unless sterilisa tion is assured. A mask fitted to one person may not fit another. Worn parts should be replaced only with parts specifically designed for the par ticular respirator. Equipment for exclusive use in emergencies should be inspected periodically to asaurc operable condition at all times. UNAPPROVED" RESPIRATORS: Respirators are classed as 'approved" by the U.S. Bureau of Mines and as "acceptable" by the U.S. Department of Agriculture with certain provisions. The U.S. Department of Agriculture states that mechanical filter and chemical cartridge respirators do not provide needed protection from inhalation of pesticide dust, mist, end vapors for use by (1) those for mulating or mixing pesticides in closed or inadequately ventilated spaces, and (2) those applying pesticides, including serojols, in greenhouses. Gas masks, hose mills with blower or self-contained air-supply units must be used in these instances. Wany commercially available respirator* are neithar "approved" Stor "acceptable". This may be because they failed to pas* testing procedures er because they were never Submitted for testing. Respirators are purchased frequently without rrgard to their ability ' to do the job. Price consideration should not be the deciding factor. For obvious reasons, a piece of sponge or gsuxe should not be purchased for use where there is exposure to toxic dusts; a respirator approved for dust should uot be used to protect thr workman from a toxic gas or for spray-painting operations. Some respirator* will protect a hay fever sufferer from pollen./ but will rot protect a workman from the effects of industrial dust. Use of "unapproved" or improper respirators can produce a fcelinf false eecurity, causing a workman to expose himself to a situation which he would otherwise avoid. PRECAUTIONS: If a respirator" is judged to Ic inefficient fur the job, rc-novc It and obtain the proper device for your application. Also, be careful with chem ical canister* and cartridges. These have a limited shelf life. If you have a problem or arc uncertain as to the proper type of respiratory protective equipment needed, contact the Division of Occupa tional Health. Pennsylvania Department of Health, for consultation. - 7B4 HIH-19128 P RULES AND REGULATIONS COMMONWEALTH OF PENNSYLVANIA DEPARTMENT OF HEALTH r ' .CHAPTER 4 Article 432 > : Regulations Establishing Threshold Limits in Places of Employment (Reviled Aug. 20, 1063) i ; J J f 55 3 s* I ? I Regulations Establishing Threshold Limits in Places of Employment Under ihc provision* of the Administrative Code Act or April 9, 1929, 1*. L. 177, the following Rule* and Regulations of the Department of Health adopted the 27th day of Oct., 1961. (Revised Aug. 20. 1963) ' ... Section 1. Purpose. The purpose of these regulations and standards is to prescribe minimum requirements and standards for the maintenance of occupational health in places of employment in Pennsylvania. * Section 2. Application ' * These regulations and standards shall apply^to every place of employment. Section 3. Definitions `* A. "Atmospheric contaminant" shall mean a harm ful substance or material in air usually occurring In the form of a dust, fume, gas, vapor, or mist. B. "Department" shall mean the Department of. Health, Commonwealth of Pennsylvania. C. "Dust" shall mean finely divided solid particles . dispersed in air and having been formed by mechanical means such as grinding, crushing, blasting, and drilling. .. D. "Fume".shall mean solid panicles dispersed in air resulting from some chemical or physical proc ess that involved a change of state, such as com bustion, sublimation, or evaporation and conden sation. E. "Gas" shall mean a formTess fluid occupying the space of enclosure. F. "General or dilution ventilation" shall mean ventilation provided to dilute the concentration of dusts, fumes, gases, vapors, or mists in the . ' atmosphere or all or part of the place of employ ment. G. "Local exhaust ventilation" shall mean that type of ventilation in which suction is applied at the point or generation of dusts, fumes, gases, vapors, and mists. H. "Mist" shall mean liquid droplets suspended in air. I. "Place of employment" shall mean a location or site where an individual possesses employment in a trade, occupation, or profession for the sake of monetary gain. J. "Threshold Limit Value" (Maximum Allowable 1 average atmospheric cnnrnurauuii ui cu.-num. inant to which worker* may be exposed for an eight hour working day. (These values are set forth in Table 1 hereof, which table is a part of these regulations). K. "Vapor" shall mean any liquid, except water, which when held in suspension in air will revert to its original liquid state after release from heat, chemical action, or pressure conditions. 1 Section 4. Employer's Duties A. Every employer shall install and provide such control measures and protective equipment as is required tor^;he protection of health. B. Every employer shall inform and periodically instruct his employees regarding known hazards and proper methods for utilizing industrial hy- , giene control measures which arc provided. G. When it is necessary for an employer to provide .protective equipment, such employer shall provide an approved means for cleaning and steriliz ing such protective equipment, and the employer thalfcaihc such'equipment to be maintained in a clean and sanitary condition. Respiratory equip ment shall not be passed from one man to another until such equipment is clean and sterilized. When filter or cartridge type respirators are used, ' such employee shall have such respirator for his own exclusive use. Respiratory equipment and replacement units shall be stored, when not in use, in approved containers. D. When employees are exposed to compounds c ipable of causing occupational disease by inhalation and/or skin or mucous membrane absorption, the department may require their employer to pro vide physical examinations and other tests for them at periodic intervals. 1 I I Section 5. Threshold Limit Values N A. No employee shall be exposed to atmospheric concentrations of contaminants which concentrations may give rise to occupational disease. Table 1 shall be used for the determination of permis sible levels. B. Exposures to atmospheric contaminants or adverse environmental conditions not referred to in Section 5A shall be controlled when necessary * to protect health. j *^ 1 j { J Section 6. Air Recirculation and Discharge A. No air from any local exhaust ventilation system may be recirculated without express approval by the Department. 2 snail be such that no nir contamination will cme any window, door, or other opening of any wur area in quantities sufficient to create a healt hazard to or in such area. Section 7. Tanks and Vessels A. No individual shall be permitted to enter a tan or closed vessel until it has been ascertained the the atmosphere in the tank or vessel contains a adequate quantity of oxygen and that atmospher contaminants have been diluted to safe concentre tions. B. If the oxygen content of the air and the quantit ' of atmospheric contamination are not determinee entry to the tank or vessel shall be prohibite unless the workman Is equipped with an air tie. respirator, a safety harness and safety line, an< that another employee be stationed outside th tank or vessel to remove the workman in the tan! or vessel should he experience difficulty. Section 8. Housekeeping A. The interiors, exteriors, and environs of building where hazardous materials are used, stored, o handled, shall be cleaned and maintained in sue! a manner as to prevent harmful exposure tt hazardous materials. B. Employees engaged in such cleaning operation and all others who may be exposed shall wca protective equipment as is required. The cleanin; operations should be done by suction apparatus. C. Where wet processes are used, reasonable drain age should be maintained. False Boors, plat forms, mats, or other means of safe footing shoulc be provided. Section 9. Labeling Adequate identification, warning, and caution label shall be applied to all containers of hazardous chcm seals. Substance &-hour maximum average exposure Mg. per* P.P.M.* Cu. M. Acetaldehyde 200 Acetic acid * 10 -- Acetic anhydride 5-- Acetone 1,000 -- Acetonitrile 40 --. Acetylene tetrabromide 1-- Acrolein 0.1 Acrylonitrile--Skin 20 --` Aldrin (J, 2, 3,4,10,10-hexa- chloro-1. A, 4a, 5, S, Ba-hexa- . ' hydro-1,4, 5,8-dimethano- naphthalene)--Skin Allyl alcohol--Skin - . -- ____ .0.252 ' 1-------- Allyl chloride 1-- Allyl glycidyl ether (AGE) 10 -- Allyl prapyl disulfide Ammonia 2-- 50 -- * Ammonium sulfamatc (Ammate) -- 15 . Amyl acetate 100 .-- Amyl alcohol (isoamyl alcohol) 100 -- Aniline--Skin 5 ' Antimony 0.5 ANTU (alpha naphthyl thiourea) -- 0.3 * Arsenic -- 0.5 Arsine 0.05 m-- Barium (soluble compounds) -- 0.5 Benzene (benzol)--Skin 25 -- Benzyl chloride 1-- Beryllium Boron oxide Boron trifiuoride ;-- 0.002 -- 15. 1 mm Bromine 0.1 -- Butadiene (1,3-butadiene) 1,000 MM 2-Butanone (methyl ethyl ketone) 200 2-Butoxy ethanol (Butyl -- CellosoUe) 50 mr~ Butyl acetate (n-butyl acetate) 200 -- Butyl alcohol ten. Butyi alcohol Butylamine n-Butyl glycidyl ether (BCE) Butyl mercaptan 100 100 5 50 10 -- MM MM MM * MM p-tert. Butyholuene Cadmium oxide fume Calcium arsenate Carbon dioxide Carbon disulfide--Skin Carbon monoxide 10 . - - 5,000 20 100 MM 0.1 1 __ ____ * A5 .*i' Substance 8-hour maximum average exposure Mg. pcrk P.P.M.* Cu. M. Carbon tetrachloride--Skin Cblortlanc (l,2,4,5.6,7,B,8- 10 * ectachloro-33,4,7,7a-tctra- hydro-4,7-methanoindcne) Chlorinated camphene, 60% -- Chlorinated diphenyl oxie: -- Chlorine 1 Chlorine dioxide 0.1 * 'Chlorine trifluoride 0.1 Chloroaectaldehyde 1 x Chlorobenzene (monochloro- * b'enzene) 75 Chlorobromomethane. 200 Chlorodiphcnyl (42% Chlorine) --Skin -- Chlorodiphcnyl (54% Chlorine) --Skin -- Chloroform (trichloromethane) 50 1-Chloro-l-nitropropane 20 Chlorepicrin 0.1 Chloroprene (2-chloro- * 1,3-butadiene) Chromic acid and chromates 25 * (as CrO,) Cobalt -- -- Crag (R; herbicide (sodium 2*[2,4-dich!orophenoxyl ethanol hydrogen sulfate) -- Crcsol (all isomers)--Skin Cyanide (as CX)--Skin 5 -- Cyclohexane 400 Cyclohexanol Cyclohexanone '. 50 . 50 Cyclohexene 400 2,4-D (2,4-dichlorophenoxy- acetic acid) -- DDT (2.2-bis (p-chloropheny!)- 1,1,1-trichloroe thane)--Skin -- Decaborane--Skin 0.05 Diacetone alcohol (4-hydroxy- 4-methyl-2-pentanone) 50 Diborane 0.1 1,2-Dibromoethane (Ethylene * dibromide) ~ 25 o-Dichlorobenzene 50 f-Dichlorobenzenc 75 Dichlorodifluoromethane . 1,000. 1.1-Dichloroethane 100 -- 0.5 0.5 0.5 -- -- -- ---- - --' --* 1 0.5 -- -- -- -- 0.7 0.5 15 -- 5 -- -- -- -- 10 ' 1. -- -- i 'J able 1. (Conlif.-rd) Substance 8-hour maximum average exposure Mg. pe P.P.M.* Cu. M 1,2-Dichloruethane (ethylene - dichluride) . 50 1,2-DichIoroethyIene 200 Dichloroethyl ether 15 Dichbromonufiuoromcthane 1,000 1,1-Dichloro-l-nitroethane 10 DichlorotetraSuoroethane 1,000 Dieldrin (1,2,3,4,10,10-hexachlort>-6,7-epoxy-1,4,4a,5,6.7. 8,S*-octahydro-l,4,5,S- dimethanonaphthalene)-- Skin . --' Diethylamine 25 Difluorodibromomethane - 100 ' Diglycidyl ether (DGE) Diisobutyl ketone 0.5 50 ' Dimethyl acetamide--Skin 10 Dimethylaniline (n-dimethyl- aniline)--Skin 5 Dimelhylformamide 20 1,1-Dimethylhydrazine--Skin 0.5 Dimethylsulfate--Skin Dinitroberuene--Skin Dinitrotoluene--Skin 1 _ Dinitro-o-creio!--Skin -- Dioxane (diethylene dioxide) 100 Dipropylene glycol methyl ether 100 EPX (o-ethyl o-p-nitrophenvl thionobenzenephosphonate)-- Skin -- Ethyl acetate Ethyl acrylate--Skin -- Ethyl alcohol (ethanol) Ethylamine Ethylbenzene Ethyl bromide Ethyl chloride Ethyl ether Ethyl formate Ethyl mercaptan Ethyl silicate Ethylene chlorohydrin--Skin Ethylenediamine Ethylene glycol dinitrate 400 25 . 1,000 23 ' 200 200 1,000 400 100 20 100 5 10 (Combined ECDX + NC) --Skin Ethylene imine--Skin Ethylene oxide 0.2 * 5 50 * . -- -- -- -- .-- 025 _ _ -- I 13 02 --- 0.5 _ mrnrn *l . __ _ . 7 Jm Va. .<a,`u . ir b . it , l h i . , a t i .m <!iU t4 i >>h . i i f t > B liJ A l> lu ll l i t e >i tU 4 r iiit'nm lt Table i. (Ccnhnunj) Substance E-hour maximum average exposure 'Mg. per* P.P.M.* Cu. M. 2-Ethoxyethanol (Ccllosolve) 200 2-Ethoxyethylacctate (Ccllosolve acetate) Fcrbam (ferric dimethyl 100 dithiocarbamate) Ferrovanadium dust -- Fluoride a-- ' Fluorine 0.1 Fluoratriehloromethane * 1,000 * Formaldehyde 5 . Furfural 5 Furfuryl alcohol 50 Gasoline 503 Cl/cidol (2,3-Epoxy-1-propanol) 50 Heptane (n-heptane) 500 Hexane (n-hexane) 500 Hexanone (methyl butyl ketone) 100 scc-Hcxy! acetate 50 Hexone (methyl isobutyl ketone) 100 Hydrazine--Skin 1 Hydrogen bromide 3 `Hydrogen chloride 5 Hydrogen cyanide--Skin 10 Hydrogen fluoride 3 Hydrogen peroxide, 90% 1 Hydrogen selenidr 0.05 Hydrogen sulflde 20 Hydroquinonc --_ . Iodine Iron oxide fume '. 0.1 _ Isophorone 25 Isopropylamine S Isopropyl glycidy! ether (ICE) 50 Ketene Lead * 0.5 Lead arsenate Lindane (hexachlorocyclohexane, gamma isomer) Lithium hydride -- Magnesium oxide fume Malaihion (o.o-dimethyl dithiophosphate of diethyl mereaptosuccinate)--Skin Manganese Mercury--Skin Mercury (organic compounds)-- Skin Mesityl oxide 25 - 15 1 2-5. '--' -- _ '_ *_ _ _' _ r--- 2 15 --, -- 0.2 0.15 - 0.5 0.025 15 15 5 0.1 0.01 -- 8 . Tabic 1. (Continual) Substance E-hour maximum average exposure Mg. per* P.P.M.* .Cu. M. Methoxychlor (2.2-di-p-methoxy' phenyl-1,1,1-trichloroethane) -- 15 Methyl acetate 200 Methyl acetylene 1,000 Methyl acrylate--Skin 10 Mcthylal (dimethoxymethane) 1,000 Methyl alcohol 200 Methyl bromide--Skin 20 Methyl cellosolve (2-meihoxy----- ' ____ _ ethanol) 25 .Methyl cellosolve acetate (ethylene glycol monomethyl * ether acetate) Methyl chloride 25 100 . ** -- -* Methyl chloroform (1,1,1trichlorocthane) Mcthylcyclohexane Methylcyclohexanol Methylcyelohexanonc Methyl formate 350 . 500 100 100 100 --* " " " ;-- Methyl isobutyl carbinol (methyl amyl alcohol) Methyl mercaptan cMethyl styrene Methylene chloride (dichloro- methane) Mor.omethyl aniline--Skin Molybdenum (soluble com 25 20 100 500 2 --r -- -- -- .-- pounds) (Insoluble compounds) Naphtha (coal tar) Naphtha (petroleum) e Nickel carbonyl 200 500 0.001 5 IS Nicotine--Skin Nitric acid p-Nitroaniline--Skin . 10 1 0.5 . Nitrobenzene--Skin Nitroethane Nitrogen dioxide 1 100 5 Nitroglycerin (combined EGDN +' NG)--Skin Nitroroethane 1-Nitropropane 0.2 100 25 2*Nitropropane 25 Nitrotolucne--Skin 5 Octane Osmium tetroxide 500 0.002 Ozone 9 "Table 1. (Cenlint'td) Table). (Continual) Substance 8-hour maximum average exposure Mg. perw P.P.M.* Cu. M. Substance 8-hour maximum average exposure Mg. pe: P.P.M.* Cu. M Parathion (o,o. dicthyl-o-pnitrophenyl thiophosphatc)-- Sulfur dioxide Sulfur hexafluoride 5 1.000 .-- -- Skin Pentaborane Pentachloron.iphthalene--Skin Pentachlorophenol--Skin -- 0.005 -- -- 0.1 -- 0.5 0.5 Sulfuric acid Sulfur monochloride Sulfur pentafluoridc Sulfuryl fluoride -- 1 " 0.025 5 1 -- -- Pcntanone (methyl propyl 2,4,5T (2.4, 5-Trichloro- . ketone) 200 -- phenuxy-acetic acid) -- 10 . Pentane 1,000 _ * TEDP (tetraethyl dithiono- Perchloroethylenc (tetrachloro- .... - ------ - - - - - - . ... _ pyrophosphate)--Skin .- -- `..... . 0.2 Cthylene) 100 --' TEPP (tetraethyl pyrophosphate) . Perchloromethyl mercaptan 0.1 --Skin -- 0JJ5 Pcrchloryl fluoride Phenol--Skin 3 5-- Tellurium .. 1,1,2, 2-Tctrachloroethane-- -- . 0.1 Phenyl glycidyl ether (PCE) 50 Skin 5-- Phenylhydrazine--Skin 5 Tctrahydrofuran 200 -- Phosdrin (2-carbomethoxy-l- . Tctranitromethane 1 ' -- methyl vinyl dimethyl Tetryl (2, 4,6rtrinitrophenyl-- phosphate) -- 0.1 methylnitramine) --Skin -- l-S Phosgene (carbonyl chloride) Phosphine . 1 0.3 --- Thallium (soluble compounds) --Skin * 0.1 Phosphoric acid Phosphorus (yellow) Phosphorus pentachloride Phosphorus pentasulflde Phosphorus trichloride* -- -- ---- 0.5 1 0.1 1 1 Thiram (tctramethyl thiuram disulfide) Titanium dioxide Toluene (toluol) o-Toluidine--Skin -- -- 200 5 ' 5 15 '-- -- Picric acid--Skin -- 0.1 Platinum (soluble salts) -- 0.002 Propyl acetate 200 Propyl alcohol (isopropyl alcohol)1 400 Propyl ether (isopropyl ether) 500 n-Propyl nitrate 25 Propylene dichloride =* .(1, 2-dichloropropane) 75 Propylene imine--Skin 25 Propylene oxide 100 -- Pyrethrum Pyridine Quinone --` 5 0.1 "5 Rotenone (commercial) :-- 5 Selenium compounds (as Sc) -- * 0.1 Sodium fluoroacetate (1 OS0)-- -* - Skin Sodium hydroxide Stibihe -- -- 0.1 ? 0.05 2 -- Stoddard solvent .Strychnine 500 --- ' -- 0.15 Tolylene*2,4-diisocyanate 0.02 -- Trichloroethylene 100 -- ' Trichloronaphthalene--Skin --- - S 1, 2, 3-Trichloropropane 50 -- t 1,1,2-Trichloro 1,2, 2-trifluoroethanc 1,000 -- Triethybmine 25 . -- ' Trifluoromonobromomethane 1,000 __ Trinitrotoluene--Skin - 1.5 Triorthocrcsyl phosphate 0.1 Triphenyl phosphate ___ 3 Turpentine 100 Uranium * (soluble compounds) (insoluble compounds) Vanadium 0.0 0.2 (VjOj dust) (VjOj fume) Vinyl chloride (chloroetnylene) 500 0.5 0.1 Vinyl toluene 100 Warfarin (3-(cr acetonylbeniyI]-4- e) 100 hydroxy coumarin) -- 0. i 10 u *-</ Substance S-hour maximum average exposure Mg- per* P.P.M.* Cu. M. Xylene (xylol) Xylidine--Skin Yttrium Zinc oxide fume Zirconium compounds (as Zr) 200 5 _ -- -- -- -- 5 5 5 NOTE: The word "Skin" following a substance's name indicates that the substance can penetrate the skin to cause systemic effects. Parts of rapor or gas per million parts of air by volume at 25* C and 760 mm Hg pressure. `Milligrams of particulate per cubic meter of air. Mineral Dusts Substance Silica Crystalline Quartx (threshold limit calculated from the formula) Cristobalitc (same) Amorphous, including natural diatomaccous earth Silicates (less than \ % crystalline silica) Asbestos M ica Soapstone Tale Portland cement Miscellaneous (less than 1% crystalline silica) M.P.P.C.F.* 250 ' %SiO,-t-5 20 5 20 ~ 20 20 50 . 50 Millions of particles per cubic foot of air based on impinger samples'countcd by light-field techniques. 12