Document zz806wKogxVneEd04O6wN7mvz

ro o SOAKC OF LiKt^fOhS la.i-': JaCuvo-i, ,W ts lin-t, JEkt* - . c- A Mr, Richard Henderson Manager, Environmental Hygiene Services lin Research Center 75 Winchester Avenue Hew Haven, Connecticut 06^Ctk VERNON l k'JiL ,, .f April 6, 1970 .y~ -V . Dear Dick: The TLV Committee met last week with V. K. Rowe present and final decision for the TLV for VINYL CHLORIDE was 200 ppm. This, as you will note, was the essential recommendation of Mutchler at the Gordon Conference in I968. Apparently, Dow Ksr.'t seen any new evidence to alter this tentative recommendation. Yours sincerely; Herbert E. Stokinger, Ph.D Chairman Threshold Limits Committee [ 1. OLI 2685 ft /',l - _ 7 - / Threshold Limit Values of Airborne Contaminants Adopted By ACGIH For 1969 AND INTENDED CHANGES OLI 2686 Substance Tellurium hexafluoride .......... TEPP - Skin ......................................... C Torphenyls ............................. 1. 1, I, 2-Tetrachloro-2, 2-di- fluoroethane ........................ 1. 1, 2, 2-Tetrachloro-l, 2-di- fluoroethane .................. 1, 1, 2, 2-Tetrachlorocthar.e-Skin Tctrachlomothylene, see Per- chloroethylene ................................ .. Tetrachloromcthane, sec Carbon iHrachloridc.................................... Tetrachloronaphthalenc - Skin .... ** Tetraethyl lead (as Pb) - Skin .... Tetrahydrofuran.................................. *f Tdrumethyl lead (TML) (as Pb) - Skin...................................................... 1 etramclhyl succinonitrile - Skin . Tetranitromothane............................. Tt-'ry](2, 4, O-trinitrophcnyl- mcthylnilraminc) - Skin................ TL.ilhum (soluble compounds) - Skm........................................... ppm0) 0.02 1 500 500 5 200 0. 5 1 Tm (inorganic empds, except SnH4 and S11O2)................ ................. .. Tin (organic cmpds)......... Titanium dioxide.................................. Toluene (toluol) ................. C Tolvwne-2, 4-dnsocyanate ............ n-Toluidine - Skin ............................. Toxaphene, see Chlorinated cam- phene ......................... Tributyl phosphate ............. 1, 1, 1-Tn hloroethane, see Methyl chloroform....................... 1, 1, 2-Tnchloroethane - Skin ... Tnrnlorocthvlene ............................. TricMoromethane, see Chloro form ............................................... .. Tnchloronaphthalcnr - Skin............ 1, 2, 3-Trichloropropane ........ 1, 1. 2-Trichlnro 1, 2, 2-tri- fluoroethane...................................... Ti ir Ley la mine...................................... Trillu'lromunobromomcthane ..... 2; 1, 6-Trinjtrupnenol see Picric acid.................................................... 2, 4, G-Trinitrophenylmethylni- tramme, sec; Tctryl.................... Trinitrotoluene - Skin.................... Triorthoere^y] phosphate........... .. 200 0.02 5 10 100 50 1,000 25 1,000 ** See Notice of Mended Changes 14 m, M3 M 0.2 0. OS 9 4,170 4,170 35 2 0. 075 590 0. 075 3 8 1. 5 C. 1 5 2 0. I 15 750 0. 14 22 5 45 535 5 300 7,600 100 6,100 1. 5 0. 1 Sub.tonc. Triphenyl phosphate...................... * Tungsten It Compounds, as W Soluble ...................................... Insoluble..................................... Turpentine.................... '............... * Uranium (natural) sol. It insol. compounds as U.......................... C Vanadium (V2O5 dust).................. (V2O5 fume).................. Vinyl benzene, see Styrene........... C Vinyl fchloride............................... Vinylcyanide, sec Acrylonitrile... Vinyl toluene ................... Warfarin ...................................... Xylene (xylol).................... . Xylldine - Skin............................... Yttrium.......................................... Zinc chloride fume ........................ Zinc oxide fume............................. Zirconium compounds (as Zr)....... 100 500 100 100 5 m*/M3 fc> 3 1 5 560 0.2 0. 5 0. 1 1,300 480 0.1 435 25 1 1 5 5 Radioactivity Tar permissible concentrations of radioisotopes in air, see U.S, Department of Commerce, National Bureau of Standards, Handbook 69, "Maximum Permissible Body Burdens and Maximum Permissible Concentrations of Radionuclides in Air and in Water for Occupational Exposure," June 5, 1959. Also, see U.S. Department of Commerce National Bureau of Standards, Handbook 59, "Permissible Dose from External Sources of Ioniz ing Radiation," September 24, 1954, and addendum of Aoril 15, 1958. * 1969 Addition 15 s OLI 2687 Threshold Limit Values of Airborne Contaminants AND INTENDED CHANCES Adopted By ACGIH For 1970 OLI 2688 Subitinct ppm*' Silver, metal and soluble compounds . Sodium fluoroacetate (1080)-Skin........ Sodium hydroxide ................................... SUbine.................. ................................... 0.1 Starch ....................................................... * Stoddard solvent .................................. 200 Strychnine................................................. **C Styrene monomer(phenylethylene) ... 100 Sucrose ..................................................... Sulfur dioxide.......... ................................ 5 Sulfur hexafluoride ................................. 1,000 Sulfuric acid............................................. Sulfur monochloride ............................... 1 Sulfur pentafluoride ............................... 0,025 Sulfuryl fluoride ..................................... 5 Systox, see Demeton ............ . 2, 4, 5 T...................................... . Tantalum ........................................ TEDP-Skin.................................. . Teflon decomposition products Tellurium .................................... . Tellurium hexafluoride ........................ 0.02 TEPP-Skin .............................................. C Terphenyls ............................................... 1 1, 1, 1, 2-Tetrachloro-2, 2-di- fluoroethane......................................... 500 1, 1, 2, 2-Tetrachloro-l, 2-di- fluoroethane......................................... 500 1, 1, 2, 2-Tetrachloroethane-Skin ... 5 Tetrachloroethylenc, see Per- chioroethylene .......................... Tetrachloromethane, see Carbon tetrachloride ....................................... Tetrachloronaphthalene-Skin .............. Tetraethyl lead (as Pb)-Skm................ Tetrahydrofuran ..................................... 200 Tctrameihyl lead (as Pbl-Skin .......... Tetramethyl succmonitrile-Skin ........ 0.5 Tetranitromcthane ................................ 1 Tetryl (2, 4, 6-trinitrophenyl- methylnitramlnel-Skin .................... Thallium (soluble compoumls)-Skin as T1 Thiram .................................................... Tm (inorganic empds, except SnH4 and Sn02) ............................................ Tm (organic empds) .............................. Tin oxide ................................................ Titanium dioxide .................................... Toluene (toluol) ...................................... 200 C Toluene-2, 4-dusocyanate .................. 0.02 o-Toluidme-Skin .................................... 5 Toxaphene, see Chlorinated camphene Tributyl phosphate ................................ 1, 1, 1-Trichloroethane, see Methyl chloroform .......................................... 1, 1, 2-Trichloroerhanp-Skin ............ 10 mg/M^ ^ 0.01 0.05 .2 0.5 D 1,150 0.15 420 D 13 6,000 1 0.25 20 10 5 V 0.1 0.2 0.05 9 4,170 4,170 35 0,100 590 0.150 i) 3 8 1.5 0.1 5 2 0.1 D D 750 0.14 22 5 45 ]) For control cA central room air, biologic monitoring 15 essential for personnel control, 1070 Addition ** Sec Notice of Intended Changes 14 ftubsUBCC Trichloroethylene............................ Trichloromethane, see Chloroform Trichloronaphthalene-Skin ............ 1, 2, 3-Trichloropropane.............. 1, 1, 2-Trichloro 1, 2, 2-trt- fluoroethane.................................. Triethylamine ........... Trifluoromonobromomethane........ * Trimethyl benzene .......................... 2, 4, 6-Trinitrophenol, see Picric 2, 4, 6-Trmitrophenylmethylnitrar see Tetryl...................................... Trinitrotoluene-Skin........................ Triorthocresyl phosphate .............. Triphenyl phosphate........................ Tungsten & compounds, as W Soluble........................................... Insoluble........................................ Turpentine ........................................ Uranium (natural) sol, & insol. compounds as U ............................ C Vanadium (V2O5 dust) .................. . (V2O5 fume) .................. Vinyl benzene, see Styrene............ **C Vinyl chloride .................................. Vinylcyanide, see Acrylonitrile ... Vinyl toluene ............ ....................... Warfarin ............................................ Xylene (xylol)..................................... XyUdine-Skin .................................... Yttrium .............................................. Zinc chloride fume .......................... Zinc oxide fume................................ Zirconium compounds (as Zr) .... Radioactivity: For permissible cc in air, see U.S. Department of C Standards, Handbook 69, "Maximu and Maximum Permissible Conce Air and in Water for Occupational see U.S, Department of Commerce Handbook 59, "Permissible Dose fre Radiation," September 24, 1954, an * 1#70 Addition ** See Notice of Intended Changes 15 OLI 2689 compounds . 0)-Ski n........ ppm ) 0.1 200 thylene) ... 100 5 1,000 1 0.025 5 mg/M3 b) 0.01 0,05 2 0.5 D 1,150 0,15 420 D 13 6,000 1 6 0, 25 20 ...................................... .................... -- -- ....................................... ducts......... ... ................................. .................... ......................... 2-di- 2-di- ne-Skin ... er- -- 0.02 -- l 500 500 5 10 5 0.2 p2 0.1 0.2 0.05 g 4, 170 4, 170 35 arbon .:! dn ., Skin ., ;)-Skin as T1 t S11H4 camphene ' Methyl 200 0.02 5 0.100 J? 590 0.150 i) 3 8 1.5 0.1 5 2 0.1 D D 750 0.14 22 5 10 45 dope monitoring is essential for personnel 14 Substance ppm*1 Trichloroethylene .....................'............ Trichloromethane, see Chloroform .. Trichloronaphthnlcne-Skin .................. 1, 2, 3-Trichloropropane .................... 1, 1, 2-Trichloro 1, 2, 2-tnfluoroethane ........................................ Triethylunune .................................... .. Trifluoromonobromomethane.......... ... * Trimethyl benzene ................................ 2, 4. 6-Trinitrophenol, see Picric acid 2, 4, 6-Trinitrophenylmethylnitramirie, see Tetryl............................................ Trinitrotoluene-Skin.............................. Triorthocresyl phosphate .................... Triphenyl phosphate ............................... Tungsten L compounds, as W Soluble ............................................... Insoluble .................. .............. Turpentine .................... .......................... Uranium (natural) sol. & insol. compounds as U................................... C Vanadium (V205 dust) ........................... (V2O5 fume) ......................... Vinyl benzene, see Styrene.................. **C Vinyl chloride ......................................... Vinylcynnide, see Acrylonitrile.......... Vinyl toluene ........................................... Warfarin............ ...................................... Xylene (xylol)........................................... Xylidine-Skm ........................................... Yttrium ................................................. Zinc chloride fume................................. Zinc oxide fume .. .. ............................. Zirconium compounds (as Zr) ............ 100 __ 50 1,000 25 1,000 25 -- -- -- -100 .. -- -- 500 100 -- 100 5 -- ---- mg/M3 b) 535 5 300 7,600 100 6,100 120 1.5 0.1 3 1 5 560 0.2 0.5 0.1 1,300 480 0.1 435 25 1 1 h 5 Radioactivity. For permissible concentrations of radioisotopes in air, see U.S. Department of Commerce, National Bureau of Standards, Handbook 69, `'Maximum Permissible Body Burdens and Maximum Permissible Concentrations of Radionuclides in Air and in Water for Occupational Exposure," June 5, 1959. Also, see U.S. Department of Commerce National Bureau of Standards, Handbook 59, "Permissible Dose from External Sources of Ionizing Radiation," September 24, 1954, and addendum of April 15, 1958. 1970 Addition ** Sec Notice of Intended Changes 15 OLI 2690