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i <br /> Table 3-3 <br /> Exposure guidelines for Identified Health Significant Site Contaminants <br />' OSHA PEL ACGIH TLV NOISH REL IDLH <br /> Contaminant 8-Hour 15-Minute 8-Hour 15-Minute 8-Hour 15-Minute <br />' (Synonymes) TWA STEL WA STEL TWA STEL <br />' Carcinogen <br /> confirmed <br /> Teratogen <br /> 10 ppm suspect <br />' Benzene 1 ppm 5 ppm 32 Mg/M3 - 0 1 ppm 1 ppm 500 ppm <br /> Diesel fuel - - 350 Mg/M3 - - - Carcinogen <br /> Lowest Carcinogen <br /> Diesel engine feasible <br /> emissions - - - - concentration - <br />' Gasoline 300 ppm 500 ppm 300 ppm 500 ppm CA CA Carcinogen <br /> Gasoline engine <br /> exhaust -f � - _ - - Carcinogen Lead-tetraethyl 0 075 mg/m3 0 1 mglrn3 0 075 mg1im3 40 mg m3 Carcinogen <br /> as Pb <br />' Crystalline -10 mglm3 - 0 05 mghn3 - -0 05 mglm3 - Occupational <br /> Silica(sand) %S102+2 carcinogen <br /> Notes <br /> ACGIH American Conference of Government lndustnal Hygienists <br /> Mg/m3 Milligrams per cubic meter <br /> OSHA Occupational Safety and Health Administration Permissible Exposure Umd <br /> PPM Parts per million by volume <br /> STEL Short-temr exposure lima <br /> TLV Threshold Lim#Value <br />' TWA Time-weighted average <br /> 1 <br /> CiwrrEary6ecAicmirtbrciahPacBel�a,c6ensltelrneaLsrrsP dac <br /> �naar <br />