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Table 5 <br /> Extraction and Emission Rates <br /> ARCO Service Station No. 2130 <br /> 7906 North El Dorado Street, Stockton, California <br /> Extraction Rate from Emissions Rate to Destruction Removal Cummulative TPHG <br /> Date Wells lbs/da Atmos here lbs/da Efficiency, % Removal lbs <br /> TPHG Benzene TPHG Benzene TPHG Benzene Period Total <br /> 07/17/95 1518 2 28 2 87 2 87 81 87 152 152 <br /> 08/29/95 3881 742 295 3 29 92 96 580 732 <br /> 09/22/95 38 81 5 15 5 57 548 86 89 466 1198 <br /> 01/24/96 1508 206 4 11 343 97 83 121 16888 <br /> 02/21/96 7801 044 512 0 012 93 97 2184 19072 <br /> 03/13/96 1 NC NC NC NC NC NC NC 19072 <br /> 06/18/96 1056 002 019 0 003 98 85 866 19938 <br /> 08/26/96 1186 001 0 13 0 002 99 80 1150 21088 <br /> 12/04/96 1778 009 123 0 002 93 97 1183 22271 <br /> 03/20/97 853 0 13 013 00014 98 99 623 22894 <br /> 06/30/97 1581 0 005 067 00016 96 67 1375 24269 <br /> 09/30/97 1236 0 002 131 <0 0015 89 >25 531 24800 <br /> 11/24/97 833 0 004 000 <0 0000 100 >100 383 1 25184 <br /> 1st quarter 98 System remained off due to low BTEX/TPHG levels in soil va or <br /> C=Not calculated <br /> . Mass of TPHG removed and Cumulative mass removed calculation are based on analytical <br /> results and average flow i ate 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 021b <br /> m ]e Calculations <br /> Ex t rate from wells=23 f?/rmn x 170 mg/m'x 0 028 mj/W x 1 lb/454,000 mg x 1,440 mm/day=0 35 lb/day <br /> lb/day) <br /> est Removal = 0 35-0 0118 x 100=96 6% <br /> Efficiency-%) 035 <br /> Cum Extraction = 0 13+0 35ley x 15 days = 3 6 lb <br /> Period-lb) 2 <br /> Cum Extraction = 1 24+3 56 = 4 80 lb <br /> Total-1b) <br /> CKC 1,ARCFIIVE1ARC0121301QTRL Y12130g299 xls P""4& <br />