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Table 1. Summary of Groundwater Extraction System Data, ARCO Station 2133, Stockton, California <br /> Start-up date 4/18/1991 <br /> Date Reporting Effluent concentration, /I Pounds removed (a,b) Total volume, ,overage <br /> sampled period TPH B T E X TPH B T E X purged, gall ons b flowrate, gpm lb <br /> 11/25/92 11/16192-12/15192 170 0 74 <05 1 4 16 010 000 000 000 0 01 72500 1 7 <br /> 12/16/92 12/16/92.1115/93 650 <0 5 053 21 48 000 000 000 000 000 <br /> 12/30/92 12116/92-1115/93 700 <0 5 0 57 1 5 65 000 000 000 000 000 <br /> 1113193 12116/92-1115/93 760 570 088 23 73 046 000 000 000 004 72500 1 7 <br /> 1127193 1116/93-2115193 1400 14 <05 <05 170 000 000 000 000 000 <br /> 2/10193 1/16/93-2/15/93 1600 190 63 22 210 283 034 0 11 004 037 212486 4 8 <br /> 2124193 2/16/93-3/15193 160 2 0 5 <03 <05 000 000 000 000 000 <br /> 3/10193 2/16/93.3/15/93 1100 89 21 1 160 1 14 009 002 000 017 124320 3 1 <br /> 4114/93 3116/93-4/15/93 1500 85 18 5 180 1 35 008 002 000 0 16 108364 2 4 <br /> 5125/93 4116193-5115/93 1100 120 36 16 190 058 006 002 0 01 0 10 63102 1 5 <br /> 6/10193 5116/93-6/15193 1200 130 46 20 190 1 89 0 20 007 003 030 189207 4 2 <br /> 7115193 6116193-7115193 1100 110 27 10 140 98465 24 <br /> Cumulative removal, lbs, 128 7113 13 1 41 0 33 3 12 <br /> Cumulative removal (c), gallons 1 463 105110 23100510501 <br /> (a) Pounds removal calculation <br /> lbs removed - (µg/L)'(g/1,000,000 µg)"(Ib/454 g)"(3 76 L/gal)"(gallons pumped) <br /> To calculate pounds removal for a reporting period If several sampling events occurred In one period, we used the effluent concentrations <br /> that had the highest TPH value <br /> (b) Pounds removed, total volume purged, and average flowrate data are reported In units per reporting period <br /> (c) Gallons removal calculation <br /> gallons removed = lbs " gallon/6 2 lbs <br /> I <br /> L <br />