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Table 5 <br /> Extraction and Emission Rates <br /> ARCO Service Station No 2130 <br /> 7906 North EI Dorado Street, Stockton, California <br /> Extraction Rate from Emissions Rate to Destruction Removal Cummulative TPHG <br /> ' Date Wells lbs/da Atmosphere lbs/da Efficiency, % Removal lbs <br /> TPHG Benzene TPHG Benzene TPHG Benzene Period Total <br /> 07/17/95 0 0 0 0 0 0 0 0 <br /> 08/29/95 2730 049 294 0 03 89 94 1,174 1,174 <br /> 09/22/95 3925 064 4 31 0 04 89 93 799 1,973 <br /> 01/24/96 1725 016 1 83 0 02 89 89 226 2,199 <br /> 02/21/96 9 94 004 1 050 0 002 95 95 381 2,579 <br /> 03/13/96 NC NC NC NC NC NC NC INC <br /> 06/18/96 1428 006 067 0 003 95 95 1,175 3,754 <br /> 08/26/96 11 64 0 01 016 0 002 99 83 894 4,649 <br /> 12/04/96 1472 004 0 61 0 002 96 94 1,147 5,795 <br /> 03/20/97 1274 Oil 060 0 002 95 98 1,105 6,900 <br /> 06/30/97 11 97 007 0 38 0 001 97 97 1,075 7,975 <br /> 09/30/97 1407 0 003 1 00 0 002 93 40 560 8,535 <br /> 11/24/97 1089 0 003 096 0 002 91 46 574 9,109 <br /> 1 st quarter 98 System remained off due to low BTEX/TPHG levels in soil vapor <br /> NC=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 Ib <br /> Daily benzene emissions shall not exceed 0 02 Ib <br /> Sam le Calculations <br /> Ext rate from wells=23 W/min x 170 mg/m3 x(mal 35 3145 ftp)x 1 Ib/454,000 mg x 1,440 min/day=0 35 Ib/day <br /> (Ib/day) <br /> Des, 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 The extraction amount for the first period was not <br /> (Period-lb) 2 averaged with the pre-treatment extraction rate <br /> of 0 Ibs/day <br /> Cum Extraction = 1 24+ 3 56 = 4 80 Ib <br /> (Total-lb) <br /> ' 1 1ARG01vern121301engmcermg12130 5VE&other calcs kjb XLS <br /> Extract&Emiss <br /> ' 11/17/2003 <br />