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• TABLE A-1 0 <br />HAZARD EXPOSURE GUIDELINES <br />PG&E McMULLIN GAS DEHYDRATOR STATION <br />SAN JOAQUIN COUNTY, CALIFORNIA <br />COMPOUND CAL OSHA PEL <br />1990-91 ACGIH TLV <br />Benzene 1 ppm (TWA) <br />10 ppm (TWA) <br />Toluene 100 ppm (TWA) <br />100 ppm (TWA) <br />150 ppm (STEL) <br />150 ppm (STEL) <br />Ethylbenzene 100 ppm (TWA) <br />100 ppm (TWA) <br />125 ppm (STEL) <br />125 ppm (STEL) <br />Xylenes 100 ppm (TWA) <br />100 ppm (TWA) <br />150 ppm (STEL) <br />150 ppm (STEL) <br />Gasoline 300 ppm (TWA) <br />300 ppm (TWA) <br />500 ppm (STEL) <br />500 ppm (STEL) <br />Diesel None <br />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 />A-3 <br />