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9 <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 Curnmulative Benzene <br /> Date (lb ay) Ib/da Efficiency,% Removal lbs Removal lbs <br /> TPHG Benzene TPHG Benzene TPHG Benzene Period Total Period Total <br /> 1/24/97 11854 21 039 00003 997% 9998% 267 267 19 19 <br /> 2/20/97 6160 16 0 13 0 002 998% 9990/0 1237 1504 33 52 <br /> 3/20/97 3143 0 4 1 0 04 0 001 999% 998% 378 1882 5 57 <br /> 4/16/97 34 57 0 2 006 0 001 998% 992% 931 2813 4 61 <br /> 9/9/97 5190 01 076 0153 985% NC 4702 7514 9 70 <br /> 10/28/97 23 26 01 060 0 008 974% 932% 831 8345 4 7451 <br /> 11/24/97 1661 0 03 023 0 004 986% 878% 201 8546 0 7487 <br /> 12/19/97 2236 003 073 0 004 967% 882% 150 8696 0 20 7507 <br /> 1/20/98 1936 004 0 43 0 004 978% 900% 289 8985 1 7559 <br /> 2118/98 3535 000 027 0 001 993% 56 0% ��B 9023 0 75 59 <br /> 3/12/98 008 000 004 0 000 47 4% NA 1 9024 000 7560 <br /> C=Not calculated due to high reporting limit on the effluent NA=not applicable,influent and effluent concentrations are<detection limits <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 /> RE shall be at least 95% For 3/20/98,DRE is low due to influent TPHG concetration being low(19 mg/m)and effluent TPHG <br /> concentration being nondetectable(<high laboratory detection limit of 10 mg/m) <br /> Daily TPHG emissions shall not exceed 48 0 Ib <br /> Daily benzene emissions shall not exceed 0 02 lb <br /> am le Calculations for 1/20/98 <br /> xt rate=50 ft3/min x 4900mg/m3 x 0 028 m3/ft3 x 1 Ib/454000 mg x 1440 mWilay=22 lb/day <br /> st Removal = 22-0 49 x 100=97 8% <br /> (Efficiency-%) 22 <br /> Cum Extraction = 22 Ib/day x 15 days(uptime) 3301b <br /> (Period-lb) <br /> Cum Extraction = 330+8696=9026 lbs <br /> (Total-lb) <br /> 21680MRV XLS1Table 6 6/17/98 <br />