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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 Cummulative TPHG <br /> Date Wells (lbs/dav) Atmosphere(lbs/dav) Efficrencv % Removal(lbs) <br /> TPHG Benzene TPHG Benzene TPHG Benzene Pernod Total <br /> 07/17/95 15 18 2 28 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 38 81 5 15 557 548 86 89 466 1198 <br /> 01/24/96 15 08 206 4 It 3 43 97 83 121 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 0 19 0 003 98 85 866 19938 <br /> 08/26/96 11 86 001 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 8 53 0 13 0 13 00014 98 99 623 22894 <br /> 06/30/97 15 81 0 005 067 00016 1 96 67 1375 24269 <br /> C=Not calculated <br /> Mass of TPHG removed and Cumulative mass removed calculation are based on analytical <br /> • esults 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 lb <br /> Daily benzene emissions shall not exceed 0 02 Ib <br /> Sample Calculations <br /> Ext rate from wells=23 ft3/mm x 170 mg/m3 x 0 028 m3/ft3 1 161454 000 mg x 1 440 min/day=0 35 lb/day <br /> (lb/day) <br /> pest,Removal = 0 35-0 0118 x 100—96 6% <br /> (Efficrencv-%) 035 <br /> Cum Extraction = 0 13+0 35 lb/dav x 15 days = 3 6 lb <br /> (Penod-lb) 2 <br /> Cum Extraction = 124+3 56 = 4 80 lb <br /> (Total-1b) <br /> N WSW805\1 14061061796M1 xls <br /> Rev 0 8/7197 <br />