Document LgakzoEj2K0mqNoR7N7p0zmQw

FILE NAME: Celanese (CEL) DATE: 1975 Sept 5 DOC#: CEL015 DOCUMENT DESCRIPTION: Company Guidelines for Industrial Hygiene G E N SB V . 1 0-601 INTERNAL LETTERHEAD TO I 1 A M C A N D L O C A T i O N I See attached list FROM 1N A M C AMO L O C A T I O N * Mr. Charles S. Laubly - New York E f E E N C NO. CSL:75-10 R E F E R E N C E NO. j AT 9-5-75 This copy of Guidelines for Industrial Hygiene is submitted to acquaint you with our recommended practices and procedures for monitoring worker exposures to solvent vapors and gases in our plants. The procedures outlined are con sistent with good industrial hygiene practice and meet the present requirements of OSHA. The Corporate Medical Department will be glad to assist you in implementing the monitoring program in your plant. We would appreciate any information regarding the monitoring program presently in force in your plant. CSL:rd Att. Industrial Hygiene HNA 27325 GUIDELINES FOR INDUSTRIAL HYGIENE The added emphasis on occupational health in OSHA brought upon, in part, by the asbestos, carcinogen and vinyl chloride standards means that we are going to have to do more monitoring at the plant level. The Corporate Medical Department has made plant surveys to de termine exposures to noise, dusts, fumes and solvent vapors, and will continue to aid in evaluating any exposure that presents a potential occupational disease hazard. However, the Corporate Medical Department cannot carry on the complete monitoring program prescribed by the OSHA standards--this must be done at the local level. Public Law 91-596 better known as the "Occupational Safety and Health Act of 1970" at the present time requires monitoring only for ex posures to asbestos (1910.93a) and vinyl chloride (1910.93q). However, in Section 5 (a) of the Act, it is implied that each employer should de termine the level of exposure of each employee to workroom contaminants. To be more specific Section 5 (a) of the Act states that "Each employer shall (1 ) furnish to each of his employees employment and a place of employment which are free from recognized hazards that are causing or are likely to cause death or serious physical harm to his employees; (2 ) comply with occupational safety and health standards promulgated under this Act". Section 5 (b) of the Act states that "Each employee shall comply with occupational safety and health standards and all rules, regulations, and orders issued pursuant to this Act which are applicable to his own actions and conduct. In addition, Subpart G - Occupational Health and Control, 1910.93, Air Contaminants of the Rules and Regulations states that, "an employee's exposure to any material listed in Table G-l, G-2, or G-3 of this sec tion shall be limited in accordance with the requirements of the follow ing paragraphs of this section". (See attached pages 1-6). Many of our plants have been monitoring the workplaces where there are exposures to materials covered by the present standards and to those materials presently in Tables G-l, G-2 and G-3. In most instances, where a monitoring program has been established, the Corporate Medical Department has been instrumental in implementing the program and will continue to do so. However, it is not possible for the Corporate Medical Department to have on-going programs for each plant. Therefore, it is suggested that the following guidelines be used to conduct the monitoring programs at our plants: HNA 27S26 1. Chemical indicator tubes certified by N10SH may be used for determining exposures to those materials in Tables G-l and G-2. Indicator tube suppliers such as DrSger, Gastec and Mine Safety Appliances supply NIOSH certified tubes for materials such as CO, CO2 , Cl, H2S , NH3 and NO2 , to mention a few. However, in most situations, until chemical indicator tubes are designated as a satisfactory monitoring device by an OSHA standard, the tubes should be used only as a means to identify a problem and not as an analytical tool. At the present time some industrial hygienis-ts are using chemical indicator tubes for evaluating ex posures to materials found in Tables G-l and G-2. However, these evaluations are made only after a specific tube has been calibrated for the material involved. Until such time that we can calibrate chemical indicator tubes, or NIOSH certified cali brated tubes are commercially available, any chemical indicator tube should be used only in the manner stated in the paragraph (1) above. 2. Worker exposures monitored and evaluated by methods consistent with good industrial hygiene practice should be the ultimate goal of our monitoring programs. As mentioned previously, the Corporate Medical Department will assist the Celanese plants in their surveillance of occupational health hazards by initial surveys and periodic evaluations of exposures, but routine moni toring is best done on a regular basis by plant per sonnel selected by management from among those most knowledgable and in keeping within their work assign ments . 3. Plants conducting or planning their own monitoring pro grams should contact the Corporate Medical Department for guidance relative to acceptable industrial hygiene procedures. 4. Analytical work for monitoring programs is best done on site, but in most instances this is not possible. At the present time most of the analytical work is done by a laboratory accredited by the American Industrial Hygiene Association. Any proposed analytical work for industrial hygiene evaluations should be reviewed by the Corporate Medical Department to assure that the methods of analysis are consistent with good industrial hygiene practice. HNA 27327 Two of our laboratories have expressed an interest in accreditation by the American Industrial Hygiene Association; but until such time that these labora tories are accredited, any analytical services for in dustrial hygiene monitoring which includes sampling methods and laboratory procedures should be reviewed by the Corporate Medical Department. 5. The attached sampling sheet is a suggested form for recording the data significant for an industrial hygiene monitoring program. If you have any questions or comments, please contact the Corporate Manager, Industrial Hygiene. HNA 27328 Page 1 (a) Table G-l: (1) M aterial* w ith nam e* preceded by "C"-- ceiling v a lu e s . An employee's exposure to any material in table G-l, the name of which is preceded by a "C" (e.g., C Boron trifluoride), shall at no time exceed the ceiling value given for that material in the table. (2) Other materials--S-heur time weighted averages. An employee's exposure to any material in table G-l, the name of which is not preceded by "C", in any H-hour work shift of a 40-hour work week, shall not ex ceed the H-hour time weighted average given for that material in the table. T able G - l Substance p.p.m. mg./M* ` A cetaldehyde.......................... 200 Acetic acid............................... 10 Acetic anhydride.................... A ce to n e.......................................... A c e to n itrile ................................... Aoetylene dlchlorlde, see 1, 2- 1,000 Dlchloroethylene...................... . Acetylene tetrabrom lde.............. 1 Acrolein......................................... 0.1 A crylam ide--S k in ........................ Acrylonitrile--Skin...................... 20 A ld rin --S k in ................................. Allyl alcohol--Skin...................... 2 Allyl chloride................................ 1 *C Allyl elycldyl ether (A Q E ). 10 Allyl propyl disulfide................. 2 2-Arnlnoethanol, see Ethanol- a m in e .......................................... 2 -A m ln o p y rid ln e .......................... 0.5 A m m onia................................... 50 Ammonium suUamate (Ani m ate).......................................... n-Amyl acetate............................. 100 sec-Amyl acetate.......................... 125 A niline--S k in ............................... 5 Anisidine (o, p-lsomers)--S k in - Antimony and compounds (as Sb)........................................ ANTU (alpha naphthyl t h i o u r e a ) .................................... Arsenic and compounds (as As). Arsine............................................. 0.05 A tlnphos-m ethyl--S k in ............. Barium (soluble com pounds).., p-nem onulnone. see Q u in o n e.. Rentoyl peroxide....................... . Benxyl chloride.......................... 1 Biphenyl, see D iphenyl............ Blsphenol A, sec IMglycidyl e t h e r .......................................... Boron oxide..................................... C Boron trifluorlde...................... B ro m in e ......................................... Brom oform --S k i n ........................ Butadiene (1. 3-hutadiene)........ Butancthiol. sec Ilutyl mer captan .......................................... 2-Rut:inone.................................... 1 0. 1 0.5 1,000 200 2-Butoxy rihunol (Butyl Cel- iosolve)--Skin ......................... 50 Rutvl acetate (n-hutyl acetate). 150 sec-Butyl acetate.......................... 200 tert-Butyl acetate........................ 200 Butyl alcohol................................ 100 sec-Butyl alcohol.......................... 150 tert-Butyl alcohol........................ 100 C Butylam ine--Skin................... 5 C tert-Butyl chromate (as C rO j)--S k in ................................ n-Butyl glyctdyl ether (B G E ).. 50 Butyl m ercaptan........................ 10 360 25 2.400 14 0.25 0.3 45 0. 5 3 45 12 2 33 15 525 650 in 0.5 0.5 0.3 0.5 0.2 0.2 0.5 ..... 5 15 3 0. 5 2,200 500 240 710 950 950 300 450 300 15 a 270 35 p-tert-Butvl toluene................... 10 Calcium arsenate....................................... Calcium oxide....................................... - C am phor................................... " Carbary! (S e rin )................................... Carbon black.............................................. Carbon dioxide............................. 6.00? Carbon m o n o x id e ................... 50 C h lo rd a n e --S k in ......................... Chlorinated camphene--S kin... Chlorinated diphenyl oxide....... Chlorine..................................... . Chlorine dioxide......................... C Chlorine trifluoride............... . C Chloroacetaldehyde................ a-Chloroacetophenone (phenacylchloride)................. Chlorobcntene (monochloro- b e n t e n e ) ................................... o-Chlorobentylidene malononitrlle (OCBM).......... C h lo ro b ro m o m e lh a n e............... 1 0.1 0.1 1 0.05 75 0.05 200 2-Chloro-l.3-butadiene, see C h lo ro p r e n e ............. -.............. 60 l 5 ..... 3.6 9,000 55 0.5 0. 5 0.5 3 0.3 0.4 3 0.3 350 0.4 1,050 Chlorodiphenyl (54 percent C h lo rin e )--S k in ........................... l-Chlnr<i.2.1-epoxy propane, see 2-Chloroethanol. see Ethylene Chloroethylene. see Vinyl C Chloroform (trlchloro50 l-Chloro-l-nttropropane.............. 20 Chloropicrln................... . . . 0.1 Chloroprene (2-chloro-l,3- butadiene)--Skin........... . 25 Chrom ium , sol. chromic, chromous salts as C r.............- .............. Metal and insol. salts................................ Coal tar pitch volatiles (ben- xene soluble fraction) anthra cene. B aP. phenanthrene, acridine, chrysene, pyrene....................... Cobalt, m etal fume and d u st..................... Copper fum e.................................................. D usts and Mists........................................ Cotton dust (raw )........................................ Crag herbicide....... ............................... Cresol (all lso m ers)-S k in .......... 6 C r o to n a ld e h y d e ............................ 2 Cum ene--Skin.............................. 60 Cyanide (as C N )--Skin..................... C y clo h ex an e................................ 3?? Cyclohexanol................................. 80 Cyclohexanone.............................. 80 Cyclohexene.................................. 300 Cyclopentadlene........................... <5 2, 4-D .........................................*.................. D D T --Skin................................................. D D V P, see Dlchlorvos............ Decahorane--S kin.................... 0.05 D em eton --S k in ..................... Diacetone alcohol (4-hydroxy- 4-methy 1-2-pentanone)......... 60 1.2- dlaminoethane. see E thylenedlam lne.................. D la x o m e th a n e ............................ 0.2 D lb o ra n e ..................................... 0.1 D lbutylphthalate..................... C o-D ich lorobenrene............... 50 p - D Ic h lo ro b e n ie n e ................... 75 Dlchlorodlfluoromethane............ 1,000 1.3- Dlchloro-5,6-dimethyl h y d a n t o l n ............................. 1.1- D lc h lo ro e th a n e ....... 100 1.2-D Ichloroethylene.................... 200 C Dlchloroethyl ether--S k in .. . 15 Dlchloromethane, see M ethylenechlorlde.................... D tchlorom onofluorom ethane... 1,000 C 1,1-Dlchloro-l-nltroethane-- 10 1.2-Dich loropropane, see Propylenedlcnlorlde................. 0.5 240 100 n 7 90 0.5 1 0.2 0. I 0.1 1 1 15 22 6 245 5 1,050 200 200 1,015 200 10 1 ......... 3 0.1 240 0.4 0.1 5 300 450 4,950 0.2 400 790 90 4,200 60 a UNA 97*90 T able G -!--Continued Sub*Une* p.p.m . mg./M> * D lchlorotetrafluoroethane.......... 1,000 7,000 Dlchlorvos (D D V P )--S kin.............................. 1 Dleldrin--S kin....................................... - ........... D tethylam lne................................ 25 75 D lethylam lno ethanol--S k in .. . 10 60 D iethylether, se E th y l e t h e r . . ......................................... Difluorodibrom omethane........... 100 860 C Dlelycidyl ether (D O E )........ 0.6 2.8 Dlhydroxybenxene, see H ydroqulnone.......................................... ................ ........... Dilsobutyl ketone.............................. 50 290 Diisopropylamlne--S k i n .. ........ 6 20 D imethoxymethane, see M ethylal................................................................................ Dimethyl acetam ide--S kin........ 10 35 D lm ethylam lne................................. 10 18 Dlmethylamlnobenxene, see X ylidene................................................................................ D lm ethylanlllne(N -dlm ethyl- anlllne)--S kin............................ 6 25 D lm ethylbcnrene, see X ylene............................................. Dimethyl 1.2-dibromo-2,2-dl- chloroethyl phosphate, (D lbrom )........................................................... 3 D lm ethylform amide--S k in ........ 10 30 2,6-Dlmethylheptanone, see Diisobutyl ketone................................................................ 1.1- D im cthylhydraiine--Skin-- 0.6 1 D im ethylphthalate............................................ 6 D imethylsulfate--S kin................ 1 6 Dlnltrobenrene (all isomers)-- S k in .................................................................... I D in itro-o-cresol--S k in ........................................ 0.2 D iiiltrotoluene--Sktn......................................... 1-5 Dloxane (Diethylene dioxide)-- S kin.............................................. 100 360 D iphenyl........................................ 0.2 1 Dlphenylmethane diisocyanate (see Methylene blsphenyl Isocyanate (M D I).............................................................. . Dipropylene glycol m ethyl ether--S kin................................. 100 600 Dl-sec. octyl phthalate (Di-2- e t h y l h e x y l p h t h a l a t e ) ...................................... 6 E ndrln--S k in ...................................................... 0.1 E p ic h lo r h y d r in --S k i n ................. 5 19 E T N - S k in .......................................................... 0.6 1.2- Epoxypropanc, see Propyloneoxlde.................................................................. 2.3- F.poxy-l-propanol. see G ly c id o l............................................................................... Ethane thiol, see E thylm erc a p i a n ............................................ E thanotam inc................................ 2-Ethoxyethanol--S k in ............... 2-Ethoxyethylacetate (Cello- solve acetate)--S kin................. E thyl acetate................................. E thyl acrylate--S kin.................. Ethyl alcohol (ethanol).............. E thylam ine.................................... Ethyl sec-amyl ketone (5- methy 1-3-hcptanonc)................ E thyl bentene............................... Ethyl brom ide.............................. E thyl butyl ketone (3- H eptanone)................................ Ethyl chloride............................... Ethyl ether.................................... Ethyl form ate............................... C Ethyl m ercaptan...................... Ethyl silicate................................. Ethylene chlorohydrin--S k in .. Ethylcnodlam lnc.......................... Ethylene dibromide, see 1,2- D ibrom oethanc........................... Ethylene dlchlorlde, see 1,2- D lc h lo ro c th a n c ............................ C Ethylene glycol dhiltrate and/or N itroglycerin--S k in ... 3 200 100 400 25 1,000 10 25 100 200 50 1,000 400 100 10 100 5 10 *0.2 6 740 540 1,400 100 1,900 18 130 435 890 230 2,600 1,200 300 25 850 16 25 1 See footnotes a t end of table. Paye 2 Ethylene glyool monomethyl ether acetate, tee Methyl cellosolve acetate................................................................. E thylene Imlne--S kin................. 0.5 1 E thylene oxide.............................. 60 00 E thylldlne chloride, see 1,1- D lc h lo ro e th a n e .................................................................... N -E thylm orphollne--S k in ......... 20 94 F erbam ................................................................. 15 Ferrovanadlum d u st.......................................... 1 Fluoride (as F ).................................................... 2.5 F lu o r i n e .......................................... 0.1 Fluorotrlchlorom ethane.............. 1,000 0.2 5,600 Form ic a d d .................................... 5 9 F urfural--S k in .............................. 5 20 F urfuryl alcohol.................... -- 50 200 Glycidol (2,3-Epoxy-l- 2 - E t h o x y e th a n o l ............. . G uthlon , see Atlnphos- m e th y l............................... H afnium ............................................. H eptachlor--S kin............................. H eptane (n -h e p ta n e )...-. ............ 600 1Iex ochloroelhane--S k i n ............. 1 Hexochloronaphthalene--S k in___ Hexane (n-hexane)........................ 600 0.5 0.5 2,000 10 0.2 1,800 2-Hexanone.................................... 100 410 Hexone (Methyl taobutyl ketone)........................................ 100 410 sec-Hexyl acetate.......................... 50 H ydraxine--S kin.......................... 1 Hydrogen brom ide....................... 3 C Hydrogen chloride................... 5 Hydrogen cyanide--Skin............ 10 300 1.3 10 7 11 Hydrogen peroxide (90%)........... 1 1.4 Hydrogen selenlde........................ 0.05 0.2 H ydroquinonc.................................. 2 C Iodine.......................................... 0.1 1 Iron oxide fum e................................ 10 Isoamyl acetate............................. 100 525 Isoam yl alcohol............................. 100 360 Isobutyl acetate............................ 150 700 Isobutyl alcohol............................ 100 300 Isophorone...................................... 25 140 Isopropyl acetate.......................... 250 950 Isopropyl alcohol.......................... 400 Isopropylam ine............................. 5 Isopropylether............................... 500 980 12 2,100 Isopropyl glycldyl ether (IQ E ). 50 K etene............................................. 0.5 Lead a r s e n a te ...................... . . . . Lindane--S kin................................ L ithium h y dride............................ L .P .O . (liquified petroleum 240 0.9 0.15 0.5 0.025 gas)............................................... 1,000 Magnesium oxide fum e...................................... M alathlon--S kin................................................. 1,800 15 15 Maleic anhydride.......................... 0.25 l C Manganese....................................................... 5 Mesityl oxide................................. 25 100 Methanethlol, see Methyl m ercaptan........................................................................ M e th o x y c h lo r............................................................ ifi , 2-Methoxyethanol, see Methyl Methyl acetate............................... Methyl acetylene (propyne)___ Methyl acetylene-propadlene m ixture (M A PP )...................... M ethyl acrylate--Skin................. Methylal (dimethoxymethane). . Methyl alcohol (m ethanol)......... M ethylam ine................................. M ethyl am yl alcohol, see Methyl tsobutyl carbinol. 200 1,000 1.000 10 1,000 200 10 Methyl (n-amyl) ketone (2- H eptanone)................................ 100 C Methyl bromide--Sirin............ 20 Methyl b u ty l ketone, see 2- H e x a n o n e ....................................... Methyl cellosolve--Skin.............. 25 Methyl cellosolve acetate--Skin 25 Methyl chloroform........................ 350 Methylcyclohexane....................... 600 Methylcyclohexanol..................... 100 610 1,650 1.800 35 3,100 260 12 465 80 80 120 1,900 2,000 470 HNA 27330 T ablb G - l-- C ontinued Substance p.p.m. mg./M` o -M eth y lcy clo h ex an o n e--S fc ln .. Methyl ethyl ketone (M EK), see 2-liutannno............................ Methyl formate.............................. Methyl Iodide--S k in .................... Methyl lsobutyl carblnol--Skin. Methyl lsobutyl ketone, see Hexone.......................................... Methyl Isocyanate--S kin ............ C Methyl m e rc a p ta n -................. Methyl m ethacrylate................... Methyl propyl ketone, see 2- Mentanone................................. . C a Methyl styrene..................... C Methylene blsphenyl Isocyanate (M D I).................... Molybdenum: Soluble com pounds................. Insoluble com pounds............. Monomethyl aniline--Skin----C Menomethyl hydrazine-- S k in ............................................ Morpholine--S k in ....................... Napn th a "(coal ta r)...................... N aphthalene................................ Nickel carbonyl........................... Nickel, metal and soluble empds, as N l............................. N ico tin e--S k in ............................ Nitric ac id .................................... M trlc oxide.................................. b-Nltroanlllne--S k in ................. Nitrobenzene--S kin................... p-Nltrochlorobenzene--S k in ... N ltroethane................................. Nitrogen dioxide......................... Nitrogen trifluoride................... Nitroglycerin--S kin.................. N ltrom ethane............................ . 1- N ltropropane............. 2- N ltropropane............ . Nitrotoluene--Skin.................. . Nltrotrlchlorom ethane, see C h lo ro p lc r ln ........................... O ctachloronaphthalene--Skin O ctane........................................ Oil mist, m ineral..................... Osmium tetroxlde..................... Oxalic acid.................................. Oxygen dlfluoride..................... Ozone............... ........................... P araq u a t--S kin......................... Paratn ion--S kin........................ P e n t a b o r a n e ............................... Pentachloronaphthalene--S k in .. Pentachlorophenol--8k In............. P entane......................................... 2-Pentanone................................... Perchloromcthyl m ercaptan___ Perchloryl fluoride....................... Petroleum distillates (naphtha). P h e n o l--S k in ................................. p-Phenylene diam ine--Skin........ Phenyl ether (vapor)................... Phenyl ether-biphenyl mixture (vapor)......................... Phenylethyiene, see Styrene___ Phenyl glycldylether (P O E )... Pbenylhydrazine--S kin .............. Phosdrln (Mevinphos )-- Skin............................................. . Phosgene (carbonyl chloride)... P h o s p h in e ...................................... Phosphoric acid............................ Phosphorus (yellow).................... Phosphorus pentachlorlde.......... Phosphorus pentasulflde............. Phosphorus trichloride................ Phthallc anhydride...................... Picric acid--S kin..................... Pival (2-Pivaly 1-1,3i n d a n d l o n e ) ................................ r<5o 100 5 25 0.02 10 100 100 0.02 2 0.2 20 100 10 0.001 2 25 1 1 100 6 10 0.2 100 25 25 5 ............. 500 .............. ............. ............... 0.05 0.1 ............... ............... a 005 ................. ................. 1,000 200 0. 1 3 500 6 1 1 10 6 ........... .00....1.3. ........................... 0.6 2 ............ ........ O' 250 28 100 0.05 20 410 480 0.2 6 15 9 0.35 70 400 50 0.007 l 0.6 6 30 6 6 1 310 9 29 2 250 90 90 30 0.1 2,350 5 0.002 1 0.1 0.2 0.6 0.1 1 0.01 0.5 0.5 2,950 700 0.8 13.6 2,000 19 0.1 7 7 60 22 .0.1 04 0.4 1 0.1 1 1 3 12 0.1 0.1 Page 3 P latin u m (Soluble Salta) as P t............................................... Propargyl alcohol--Skin.......... P ropane.............................- ........ n-Propyl acetate....................... Propyl alcohol........................... n-Propyl n itrate........................ Propylene dichloride................ Propylene im lne--S k in ........... Propylene oxide........................ Propyne, see Methylacetylene P y reth ru m ................................. ......... a 002 1 ..................... 1,000 1,800 200 840 200 500 25 110 75 350 2 6 100 240 ................... 5 P y r i d i n e ...................................... 5 15 Q u ln o n e ................. ..................... a i 0.4 R D X - S k ln ............................... ........... 1.6 Rhodium , Metal fume and dusts, as R h .................................................. Soluble salts.................................................. R onnel............................................................... Rotenone (commercial).................................. Selenium compounds (as Se)........................ . Selenium hexafluoride................. a 06 Silver, metal and soluble com pounds............................. ............................. Sodium fluoroacelate (1080)-- Skin................................................................. . Sodium hydroxide............................................. 6 tlb l n e ............................................. 0.1 Stoddard solvent........................ 600 Strychnine......................................................... . Sulfur dioxide................................ 5 Sulfur hexafluoride..................... 1,000 Sulfuric acid...................................................... Sulfur monochloride..................... 1 Sulfur pentafluoride..................... 0. 025 Sulfuryl fluoride........................... 5 Systox. see Demeton . 2.4.5T............................... T an talu m ........................ T E D P --S k in ................. T ellurium ....................... 0.1 0.001 10 5 0.2 0.4 0.01 0.06 2 0.6 2,950 0.16 13 6,000 1 6 0.25 20 10 5 0.2 0.1 T ellurium hexafluoride............... 0.02 T E P P - S k i n ................................................... C T crp h en y ls............................... 1 1.1.1.2- Tetrachloro-2,2-dlfluoro- eth an e.......................................... 600 1.1.2.2- Tetrachloro-l,2-dlfluoroethane.......................................... 600 1.1.2.2- Tetiachloroethane--Skin 6 Tetrachloroethylene, see Per- chloroethylene............................................. Tetrachlorom ethane, see Carbon t e t r a c h l o r i d e ................................ Tetrachloronaphthalene--Skin. . T etraethyl lead (as P b )--S k in .. T etrah y d ro iu ran .......................... 200 Tetram ethyl lead (as P b)-- S k in ............................................................... Tetram ethyl succlnonltrlle-- S kin............................................. 0.6 T etranitrom ethane....................... 1 T ctryl (2,4,fr-trinltrophenyl- m ethylnltram ine)--Skin......................... Thallium (soluble com pounds)--Skin as T1................................. T h lram ............................................................ Tin (Inorganic empds, except oxides...................................... Tin (organic em pds).............. . C Toluene-2,4-diisocyanate........ 0. 02 o-Toluldlne--S kin........................ 6 Toxaphene, see Chlorinated cam phene.............................................. ........ T ributyl phosphate....................................... 1.1.1- Trichlorocthane see Methyl chloroform...................................... 1.1.2- Trichloroethane--Skin..........10 T itanium dioxlde............................................. Trlchloromethane, see Chloro fo rm ............................................................... T r i c h lo r o n a p h t h a le n e --S k in ........................ 1.2.3- Trlchloropropane........ 1,1,2-Trichloro 1,2,2-trifluoro- e t h a n e .......................................... 60 1,000 T rlethylam lne............................... 25 Trifluorom onobrom om ethane... 1.000 2,4,6-Trinltrophenol, see Picric a c i d ................................................................ 0.2 0.05 9 4.170 4.170 35 2 0.075 590 0.07 3 8 1.6 0.1 6 2 0.1 0.14 22 5 45 15 6 300 7,600 100 6,100 HNA 273*1 Table G -l--Continued (b) Table G-2: Page *4 Substance p.p.m. mg./M* * (1) 8-hour time w eighted averages. An employee's exposure to any material listed 2,4,6-Trinitrophenylmethyl- in table G-2, in any 8-hour work shift of a nltram lne. see T e try l........................................................... Trinitrotoluene--S kin....................................... 1.6 Triorthocrcsyl phosphate................................. 0.1 Triphenyl phosphate......................................... 3 T urpentine..................................... 100 660 Uranium (soluble com pounds)......................... 0.05 Uranium (insoluble compounds)........................... 0.26 C Vanadium: 40-hour work week, shall not exceed the 8hour time weighted average limit given for that material in the table. ( 2) A c c e p t a b l e c e i l i n g c o n c e n t r a t i o n s . An employee's exposure to &material listed in VjO i d u s t.......................................................... 0.6 table G-2 shall not exceed at any time dur V jO ifum o................................................................ 0.1 Vinyl benzone, seo Styrene.................................................... ing an 8-hour shift the acceptable ceiling *C Vinyl chloride........................ 600 1,300 concentration limit given for the material Vlnylcyanide, see A crylonitrile............................................. in the table, except for a time period, and Vinyl toluene................................. 100 W a rfa rin ................................................................ 480 0.1 up to a concentration not exceeding the Xylene (xylol)............................... 100 435 maximum duration and concentration X ylldlne--Skin............................. 6 25 allowed in the column under ``acceptable Y ttriu m ............................................- .................. 1 Zinc chloride (um e............................................. 1 maximum peak above the acceptable ceiling Zinc oxide {ume.................................................. 5 concentration for an 8-hour shift." Zirconium compounds (as Z r)......................... 5 1970A d d itio n . (3) Example. During an 8-hour work shift, an * employee may be exposed to a concentration P arts oi vapor or gas per million parts of contami nated air by volume at 25 C. and 760 mm. Hg pressure. of Benzene above 25 p.p.m. (but never above * Approximate milligrams of particulate per cubic 50 p.p.m.) only for a maximum period of 10 meter of air. minutes. Such exposure must be compen (No footnote " c " is used to avoid confusion with sated by exposures to concentrations less celling value notations.) * An atmospheric concentration of not more than than 10 p.p.m. so that the cum ulative 0.02 p.p.m ., or personal protection m ay be necessary exposure for the entire 8-hour work shift to avoid headache. does not exceed a weighted average of 10 As sampled by method th at does not collect vapor. I For control of general room air, biologic monitoring p.p.m. is essential for personnel control. M aterial Table 0 - 2 8-hour time weighted average Acceptable celling concentration Acceptable maximum peak above the acceptable celling concentretlon for an 8-hour shift. ------------------------------------------------- Concentration Maximum duration Benxene (Z37.4-1969)........................................ 10 p .p .m ..............26 p .p .m ... Beryllium and beryllium com pounds 2pg.fM*.............. (Z37.29-1970). 6 m./M>___ C adm ium fume (Z37.5-1970)______________ 0.1 mg./M__. . . . 3 m g ./M '... Cadm ium dust (Z37.6-1970)............................ 0.2 mg./M........... 0.6 mg./M., Carbon disulfide (Z37.3-1968)......................... 20 p .p .m ..............30 p .p .m ... Carbon tetrachloride (Z37.17-1967).............. 10 p .p .m ............ 2 6 p .p .m ... E thylene dlbrom lde (Z37.31-1970)................. 20 p .p .m ..............30 p .p u n ... E thylene dlchloride (Z37.21-1969)................ 60 p .p .m ............. 100 p .p .m . Form aldehyde (Z37.16-1967)............................ 3 p .p .m ...............8 p .p .m ... Hydrogen fluoride (Z37.28-1969)............................. do....................................... Fluoride as dust (Z37.28-1969)........................ 2.5 mg./M............................. . Lead and Its Inorganic com pounds (Z37.11- 0.2 mg./M................................. 1969). Methyl chloride (Z37.18-1969)......................... 100 p .p .m ........ 200 p .p .m ___ Methylene Chloride (Z37.3-1969).................. 600 p .p .m ........ 1,000 p .p .m .. Organo (alkyl) m ercury (Z37.30-1969).......... 0.01 m g./M ... 0.04 m g./M ., Styrene (Z37.15-1969)....................................... 100 p .p .m ........ 200 p .p .m ___ Trichloroethylene (Z37.19-1967)............................. do.........................do............ Tetrechloroethylene (Z37.22-1967).........................do.........................d o . . . . . . . Toluene (Z37.12-1967)....................................... 200 p .p .m ......... 300 p .p .m ... Hydrogen sulfide (Z37.2-1966)..................................................... 20 p .p .m ___ Mercury (Z37.&-1971)..................................................................... 1 mg./10M Chromic acid and chromatea (Z37.7-1971).........................................do ___ 60 p .p .m .......... 10 m inutes. 26 Mg./M..............30 m inutes. 100 p .p .m ............ Do. 200 p .p .m ............ 5 m inutes In any 4 hours. 60 p .p .m ..............6 m inutes. 200 p . p . m . . . . . . . 6 m inutes In any 3 hours. 10 p .p .m ..............30 m inutes. 300 p .p .m ............ 6 m inutes In any 3 hours. 2,000 p .p .m ......... 5 m inutes In any 2 hours. 600 p . p . m . . . '..*. 300 p .p .m ............ ........ d o ................... 600 p .p .m ............ 60 p .p .m .............. 6 minutes in any 3 hours. 6 m inutes In any 2 hours. 6 m inutes In any 3 hours. 10 m inutes. 10 m inutes once only If no other measur able exposure occurs. MMA 0-7Z 2o Page 5 (c) Table G-3: An employee's exposure to any material listed in table G-3, in any 8-hour work shift of a 40-hour work week, shall not exceed the 8-hour time weighted average limit given for that material in the table. T able Q-3--Mineral D usts Substance Mppcf Mg/M1 811IC&: Crystalline: Q uartz (respirable)................ 250 10rag/M %S10*+6 %SiOH-2 Q uartz (total d u st)...................................... 30mg/M> Cristobalite: Use H the value calculated from the count or mass formulae for quartz. Tridym ite: Use H the value calculated from the for mulae for quartz. Amorphous, including natural diatomaceous ea rth ................... % StO i+ 2 20 80mg/M> %S1Q> Silicates (less th an 1% crys talline silica): M ic a ................................................... Soapstone......................................... Talc (non-asbestos-form)... 20* Talc (fibrous). Use asbestos lim it .................................... Trem olite (see talc, fibrous) Portland cem ent............................ G raphite (n atu ral)................... 15 Coal dust (respirable fraction less than 6% SiOj)....................................... For m ore th an 5% SlOi.................................. 20 20 50 2.4mg/M> or lOmgfM* Inert or Nuisance Dust: Respirable fraction............. Total d u s t............................... %SIOr+2 15 6mg/MJ 60 i5mg)M> N ote: Conversion (actors-- mppcfX35.3=million particles per cubic m eter = particles per c.c. Millions of particles per cubic foot of air, based on lmpinger samples counted by light-field technics. ' The percentage of crystalline silica in the formula is the am ount determ ined from air-borne sam ples, ex cept in those instances in which other m ethods have been shown to be applicable. i As determined by the m em brane filter method at 430Xphase contrast magnification. Both concentration and percent quartz for the appli cation of this lim it are to be determ ined from the fraction passing a size-selector with the following characteristics: "C ontaining < 1% quartz; if > X% q uartz, u.so quartz limit. (d) Computation formulae: (1) (i) The cumulative exposure for an 8-hour work shift shall be computed as follows: C ifi + c7\ + . . . c ,r , E = -------------------------------------- 8 where: E is the equivalent exposure for the working shift. C is the concentration during any period of time T where the concentration remains constant. T is the duration in hours of the exposure at the concentration C. The value of E shall not exceed the 8-hour time weighted average limit in table G-l, G-2, or G-3 for the material involved. (ii) To illustrate the formula prescribed in subdivision (i) of this subparagraph, note that isoamyl acetate has an 8-hour time weighted average limit of 100 p.p.m. (table G-l). Assume that an employee is subject to the following exposure: Two hours exposure at 150 p.p.m. Two hours exposure at 75 p.p.m. Four hours exposure at 50 p.p.m. Substituting this information in the for mula, we have 2 X 150 + 2 X 75 + 4 x 50 ----------------------------------------= 81.25 p.p.m. 8 Since 81.25 p.p.m. is less than 100 p.p.m., the 8-hour time weighted average limit, the exposure is acceptable. (2 ) (i) In case of a mixture of air contaminants an employer shall compute the equivalent exposure as follows: where: . is the equivalent exposure for the mixture. C is the concentration of a particular contam inant. 1. is the exposure limit for th a t contam inant, from table G -l, G-2, or G-CI. HNA 27333 Page 6 The value of Em shall not exceed unity ( 1 ). (ii) To illustrate the formula prescribe! in sublivision (i) of this subparagraph, con sider the following exposures: M aterial Actual concentration of 8-hour exposure 8-hour time weighted averace exposure limit Acetoni' (Table G -l) 500 p.p.m. 2-Butanone (Table G -l) 45 p.p.m. Toluene (Table G-2) . . . 40 p.p.m. 1,000 p.p.m. 200 p.p.m. 200 p.p.m. Substituting in the formula, we have: 500 45 40 1.000 + 200 + 200 . = 0.500 + 0.225 + 0.200 E - = 0.025 Since E,, is less than unity (1), the expoure combination is within acceptable limits. (e) To achieve compliance with paragraph (a) through (d) of this section, administrative or engineeringcontrols must first be determined and implemented whenever feasible. When such controls are not feasible to achieve full compliance, protective equipment or any other protective measures shall be used to keep the exposure of employees to air contami nants within the limits prescribed in this sec tion. Any equipm ent and/or technical m easures used for this purpose must be approved for each particular use by a compe tent industrial hygienist or other technically qualified person. Whenever respirators are used, their use shall comply with 1910.134. HNA 27334 INDUSTRIAL HYGIENE SURVEY ! PLANT LOCATION: ____________________________________________ DATE: SURVEY EQUIPMENT USED: _____________________________________________________________ Sample Number DescriptionLpcaUpn pf lesL Sampling Volume Airborne Contaminant Concentration* Actual ___ TLV** TWA*** HNA 27335 ------ - ------------------- --------------------------------------------------------*As ppm or mg/m ; **Threshold limit value; ***Time weighted average