Document 6Qbw8gbydN9n5v2xXDL2oLz4

PLAINTIFF'S EXHIBIT MON-2399 i - Threshold Limit Values ; of Airborne Contaminants Substance MINERAL OUSTS m.p.p.c.f.** SILICA Crystalline Quartz, Threshold Limit calculated from the formula ....................................... 250 \'Si02+ 5 * Cristobahte ....................... Amorphous, including natural diatomaceous earth ............. SILICATES (less than 1% crystalline silica) * Asbestos, all types ..................................... Mica................................................................... Portland Cement ............................................ Soapstone ........................................................ Talc (non-asbestiform)................................. Talc (fibrous), use asbestos limit........... Tremolite, see asbestos ............................ 5 20 50 20 20 Graphite (natural) .............................................. 1' , * "Inert" or Nuisance Particulates 50 (or 15 mg/M whichever is the see Appendix D smaller) of total dust < 1% SiC>2 Conversion factors mppcf x 35.3 = million particles per cubic meter = particles per c. c. NOTICE OF INTENDED CHANGES (for 1970) These substances, with their corresponding v: prise those for which either a limit has been prop< first time, or for which a change in the "Adop has been proposed. In both cases, the proposed li be considered trial limits that will remain in the 1 period of at least two years. During this time, the Adopted Limit will remain in effect. If, after tv evidence comes to light that questions the appropr the values herein, the values will be placed in the list. Documentation is available for each of these; llERCURY (all form* except alkyl) ...... 0.05 i Substance ppa 2-Acetylaminofluorene-Skln................. - Allyl glycidyl ether................................ 4-Aminodiphenyl-Skin............................ Ammonia .................................................. - Ammonium chloride fume .................... Asphalt (petroleum) fumes.................... - Butyl lactate............................................ Camphor (synthetic)................................ Diazlnon-Skin.......................................... 2-N Dlbutylamino ethanol-Skln............ Dichlorobenztdine-Skin.......................... Diethylene tnamlne-Skln...................... 4-Dimethylimi no azobenzene................ Fibrous glass.......................................... C Formaldehyde.......................................... * Iron pentacarbonyl................................... - Mercury (Alkyl compounds) - Skin___ - Methyl chloride........................................ -Methyl 2-cyanoacrylate.......................... - Methylcylopentadienyl manganese tricarbonyl (as Mn)............................ Methyl demeton-SIdn.............................. Methyl parathion-Skln............................ Phenothlazine-Skin.................................. + Rosin Core Solder, pyrolysis products -- 5 -- 25 - -- l 2 -2 ~ l - g) - 2 0.01 -- 100 2 0.1 -- -- -- -- Ulf/V Al 18 10 5 5 12 0. * 4 Al D 3 0.C 0.C 210 8 0.2 0. 5 0.2 5 0. 1 Styrene....................................................... CSubtllislns (Proteolytic enzymes)........ 100 -- 420 0.0 e) Millions ot particles per cubic toot ot air, based on impinger samples conned by light-field technics. f) The percentage of crystalline silica in the formula is the amount determined from airborne eamplee, except in Uioee inatancea in which other methods have been shown to be applicable. See Notice of Intended Changes for Mineral Duats. 16 Vanadium (VjOj Fume) as V................ Vinyl acetate............................................ Vinyl chloride........................................... Wood dust (non allergenic).................... -10 200 -- 0.0 30 770 5 LAM021594 k 1970 Revision or Addition Capital letter* retar to Appendict* C) < 5*7 u Diameter. No TLV for coarse fibrate ftaaa haa yet been aet. B003202 17 6113 18451