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rl <br /> Table 5 <br /> Extraction and Emission Rates <br /> Former ARCO Service Station No. 2168 <br /> 441 West Charter Way, Stockton, California <br /> Extraction Rate Emissions Rate Destruction Cummulative TPHG <br /> Date (lb/dav) (Ib day) Efficiencv, % Removal (lbs) <br /> TPHG Benzene TPHG Benzene TPHG Benzene Penod Total <br /> 1/24/97 11854 2 1 039 00003 997% 99 98% 267 267 <br /> 2/20/97 6160 1 6 0 13 0 002 1 99 8% 999% 1240 1507 <br /> 3/20/97 31 43 0 T—r 004 0 001 9996/o 99 8%j 373 1880 <br /> C=Not calculated <br /> Mass of TPHG removed and Cumulative mass removed calculation are based on analytical <br /> results and average flow rate for the quarter <br /> Air Permit Limits <br /> DRE shall be at least 95% <br /> Daily TPHG emissions shall not exceed 48 0 lb <br /> Daily benzene emissions shall not exceed 0 02 lb <br /> Sample Calculations <br /> Ext rate from wells=23 ft3/mm x 170 mg/m3 x 0 028 m3/ft3 x 1 Ib/454,000 mg x 1,440 min/day=0 35 lb/day <br /> Ib/day) <br />. Dest Removal = 0 35-0 0118 x 100=96 6% <br /> (Efficiency-%) 035 <br /> Cum Extraction = 0 13+0 35 Ib/day x 15 days = 3 6 Ib <br /> Period-Ib) 2 <br /> Cum Extraction = 124+3 56 = 4 80 lb <br /> (Total- 1 b) <br /> N IxIs10805111406\061796M I xis Rev 0 5/7/97 <br />