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Table 1. Groundwater Extraction System Data,ARCO Station 2133,Stockton,California <br /> • Start-up date 4/18/91 <br /> Date Total volume Average Effluent concentration pg/l Net removal lbs&gallons <br /> sampled Period extracted,gallons flowmte o m TPH-G B TPH-0 B <br /> 3/15194 2/24-94-3115/94 225,297 82 830 44 156 lbs 008 lbs <br /> 4/12/94 3/15/94-4/12194 385,000 99 630 34 202 lbs 0 l l lbs <br /> 5/16/94 4/12/94-5/16/94 447,731 94 440 26 l 64 lbs 010 lbs <br /> 6/15/94 5/17/94-6115194 321,668 77 440 28 1 18 lbs 007 lbs <br /> 7/12/94 6/16/94-7/12194 139,889 37 720 45 084 lbs 005 lbs <br /> 9114/94 7112/94-9/14194 542,188 60 310 19 140 lbs 009 lbs <br /> 10/14/94 9/14/94-10/14194 119,570 29 400 27 040 lbs 003 lbs <br /> 11/3/94 10/15/94-11/3/94 84,000 3 1 260 29 018 Ibs 002 lbs <br /> 12/9194 1114/94-12/9/94 509,796 98 <50 <05 NA lbs NA lbs <br /> 1/11/95 12/10/94-1/11195 449,820 98 540 <2 0 202 lbs NA lbs <br /> 219/95 1/12/95-219195 390,900 97 <1000 31 NA lbs 010 lbs <br /> 318195 2/10/95-3/8195 259,500 69 <1000 50 NA lbs 001 lbs <br /> 4/10195 319195-4110195 104,363 23 <1000 32 NA lbs 000 lbs <br /> 5118195 4111/95-5/18/95 259,467 49 590 055 127 lbs 000 lbs <br /> 6/12/95 5119195-6/12195 I01,208 22 760 29 064 lbs 002 lbs <br /> 7/11/95 6112/95-7111195 103,824 23 630 27 054 lbs 002 lbs <br /> 8122195 7/11/95-8122/95 117,357 25 930 44 091 lbs 004 lbs <br /> 9/19/95 8/22195-9119195 112,034 24 700 35 065 lbs 003 lbs <br /> 10/23/95 9/19/95-10/23/95 107,645 23 580 20 052 lbs 002 lbs <br /> 11/15/95 10/23195-11/15/9 95,038 21 530 9 042 Ibs 001 lbs <br /> 12/15/95 11/15195-12/1519 I23,962 27 790 24 082 lbs 002 lbs <br /> • 1129196 12/15/95-1/29/96 231,872 45 560 17 108 lbs 003 lbs <br /> 3115196 1/29/96-3/15/96 0 00 0 0 000 lbs 000 lbs <br /> Totals and averages 12/15/95-3/15196 355,834 24 450 14 1 9 lbs 006 lbs <br /> for reporting period 0 3 gals 001 gals <br /> Totals and averages 4118/91-3115/96 12,097,022 49 716 52 63 9 lbs 5 1 lbs <br /> cumulative 10 3 gals 0 7 gals <br /> Sample calculations <br /> Removal rate calculation <br /> lbs removed-CY'pg/L)*(gtam/1,000,000 pg)*(Ib/454 grams)*(3 78 Lgal)*(gallons pumped) <br /> where' 'is influent concentration <br /> To calculate pounds removal for a reporting period if several sampling events occurred in one penod,we used the effluent concentrations <br /> that had the highest TPH value <br /> Gallons removal calculation(for TPH) <br /> gallons removed a lbs*gallon/6 2 lbs(density for TPH-G is 6 2) <br /> • <br />