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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 Ibs/da Atmos here lbs/da Efficiency, % Removal lbs <br /> 'IPHG Benzene TPHG Benzene TPHG Benzene Period Total <br /> 07/17/95 15 18 228 287 2 87 81 87 152 152 <br /> 08/29/95 38 81 742 2 95 329 92 96 580 732 <br /> 09/22/95 3881 5 15 557 548 86 89 466 1198 <br /> 01/24/96 15 08 206 411 343 97 83 121 168$$ <br /> 02/21/96 7801 044 5 12 0 012 93 97 2184 19072 <br /> 03/13/96 NC NC NC NC NC NC NC 19072 <br /> 06/18/96 10 56 002 0 19 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 8 53 0 13 0 13 00014 98 99 623 22894 <br /> 06/30/97 15 81 0 005 0 67 00016 96 67 1375 24269 <br /> 09/30/97 1236 0 002 131 1 <0 0015 89 >25 531 24800 <br /> 11/24/97 833 0 004 1 000 1 <0 0000 100 1 >100 383 25184 <br /> 1st quarter 98 System remained off due to low BTEX/'ITHG levels in soil vapor <br /> 2nd quarter 98 System remained off due to low BT-X/TPHG levels in soil vapor <br /> 3rd quarter 98 System remained off due to low BTEX/TPHG levels in soil vapor <br /> 4th quarter 98 System remained off due to low BTEX/TPHG levels in soil vapor <br /> 1st quarter 99 System remained off due to low BTEXff?HG levels in soil vapor <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 /> RE 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 /> Sample Calculations <br /> Ext rate from wells=23 ft3/min x 170 mg/m3 x 0 028 rn3/ft3 x 1 lb/454,000 mg x 1,440 min/day=0 35 Ib/day <br /> ib/day) <br /> est Removal = 035-00118x 100=96 6% <br /> Effiuencv %) 035 <br /> Cum Fxtraction = 0 13+0 35 Ib/day x 15 days = 3 6 Ib <br /> (Period-Ib) 2 <br /> Cum Extr iclion = 124+z 56 = 4 80 ib <br /> Total lb) <br /> CP1E\ARC0121301Q1RLY12130Q199 XLS <br /> Table 5 T <br />