Document aBmkNKE5a4zEdX5NB55mje0Qa

PLAINTIFF'S EXHIBIT MON-2402 Threshold Limit Values For 1967 RECOMMENDED AND INTENDED VALUES Adopted at the 29th Annual Meeting of the American Conference of Governmental Industrial Hygienists, Chicago, Illinois, May 1-2, 1967. LAM021599 B0C3207 6113 18456 Substance epm* MpM*** + 1, l, 2-Tiichlwo*than - Skin Tiichloioethyiene........................... Trichloromethane. sec Chloroform Trictiloionaphthalene - Skin 1.2. 3 Tnchloropiopane 1.1.2-TrichlOfO 1,2.2-lnlluoioethane Tnethylamme.................... Tnfiuoiomonobroroomethane................... 2. 4.6-Tnmttophenol see Pictic acid 2.4,6-Tnnitiophenylmethylmtrarmne. see Tetiyl ............... Trinitrotoluene - Skin Triorthocresyl phosphate........... Tnphenyl phosphate.................. Turpentine............. t Uranium (soluble confounds) . . (insoluble compounds) ... C Vanadium (VzOs dust)............................ (VjO fumel Vinyl benzene, see Styrene........... C Vinyl chloride ......... Vmylcyanide, see Aciylomtnle Vinyl toluene....................... Warfarin .................................................... + Xylene (xylol) ........................................... Xylidine * Skin............ .................... Yttnum........................................................ Zinc oxide fume..................................... Zirconium compounds (as Zr) ................. 10. 45. 100 535 - 50 1.000 25 1,000 5 300 ? 600 100 6,100 - 15 - 0.1 -3 100 560 - 0.05 - 0.25 - 0. 5 - 0.1 500 1.300 100 480 - 0.1 100. 435. 5 25 --1 -5 -5 Radioactivity: For permissible concentrations of radio isotopes 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 S, 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 adden dum of April 15, 1958. * 1967 Addition 14 RESPIRABLE OUSTS EVALUATED BY COURT Substance m. p. p. c- 1. * SILICA. Crystalline Quartz, Threshold Limit calculated from the formula........................ 250 *Si0 2+ 5 Cnstobalite '* " " Amorphous, including natural dtatomaceous earth....................... 20 + Tiemolite.....................-............................ 5 SILICATES (less than 1* crystalline silica) Asbestos...................................... 5 Mica.............................................. 20 Soaostone ..................................... 20 Talc.............................................. 20 Portland Cement........................... 50 GRAPHITE (natural). 15 "Inert" or Nuisance Particulates SO (or 15 mg m3 whichevet is the see Appendix O smaller) Cenvefsien facto** mppcf x 35.3 = million particles per cubic metei - particles per c.c. Million* ef particle* per cubic fast ef air, based en impinge* *#sies counted by light-field technics. The eercentage ef crystolline eilice in the farmwie i die amount determined from air-beme somple*. sicept in these instances in which ether method* here been shewn te be applicable. B0CG20S 15