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TABLE A-1 <br /> HAZARD EXPOSURE GUIDELINES <br /> PG&E THORNTON GAS DEHYDRATOR STATION <br /> SAN JOAQUIN COUNTY, CALIFORNIA <br /> COMPOUND CAL OSHA PEL 1990-91 ACGIH TLV <br /> Benzene 1 ppm (TWA) 10 ppm (TWA) <br /> Toluene 100 ppm(TWA) 100 ppm(TWA) <br /> 150 ppm(STEL) 150 ppm(STEL) <br /> Ethylbenzene 100 ppm(TWA) 100 ppm(TWA) <br /> 125 ppm(STEL) 125 ppm(STEL) <br /> Xylenes 100 ppm(TWA) 100 ppm(TWA) <br /> 150 ppm (STEL) 150 ppm(STEL) <br /> Gasoline 300 ppm(TWA) 300 ppm(TWA) <br /> 500 ppm (STEL) 500 ppm(STEL) <br /> Diesel None None <br /> NOTES: 1.Table includes possible contaminants which may be encountered based on available <br /> information. <br /> 2. CAL OSHA = California Occupational Safety and Health Administration. <br /> ACGIH = American Conference of Governmental Industrial Hygienists. <br /> PEL = Permissible Exposure Limit. <br /> TLV = Threshold Limit Values. <br /> TWA = Time Weighted Average (8—hour) <br /> STEL = Short Term Exposure Limit. <br /> cca/9-23-92/8"a/JAWP12 A-2 <br />