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Table 4 <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 Cumulative TPHG <br /> Date Wells lb/da Atmosphere lb/da Efficiency, % Removal lb <br /> TPHG Benzene TPHG Benzene TPHG Benzene Penod Total <br /> 07/17/95 15 18 228 2 87 2 87 81 87 152 152 <br /> 08/29/95 38 81 742 295 329 92 96 580 732 <br /> 09/22/95 3881 5 15 5 57 548 86 89 466 1198 <br /> 01/24/96 1508 206 4 11 1 343 97 83 121 1 16888 <br /> 02/21/96 78 01 044 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 56 002 019 0 003 98 85 866 19938 <br /> 08/26/96 1186 001 0 13 0 002 99 80 1150 21088 <br /> 12/04/96 17 78 009 123 0 002 93 97 1183 22271 <br /> 03/20/97 853 0 13 1 0 13 00014 1 98 99 623 22894 <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 famits <br /> DRE shall be at least 95% <br /> Darty TPHG emissions shall not exceed 48 0 Ib <br /> Daily benzene emissions shall not exceed 0 02 lb <br /> Sample Q&jalaDons <br /> Ext-ratt from wells=23 ft'/min x 170 mg/m3 x 0 028 m3/ft3 x 1 lb/454,000 mg x 1,440 murlday=0 35 lb/day <br /> (Ib/day) <br /> Dest.Removal = 0.35-0.0118 x 100=96 6% <br /> (Efficiency-90) 035 <br /> Cum Extraction = 0.13+0.35 Ib/day x 15 days = 3 6 lb <br /> (Period-Ib) 2 <br /> Cum Extraction = 124+3 56 = 4 80 lb <br /> (Total-lb) <br /> N\xls\0805V 140U52097M 1 XIS Mon <br /> 1 <br /> Sheet 3 Rev 0 5120/97 <br />