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Table 4 Summary of Soil Vapor Extraction and Treatment System Data,ARCO Station 434, Lodi,California ' <br /> TOTAI S <br /> TPH cumulative removal(d),lbs 45413 <br /> Bcncene cumulative removal(d),lbs 143 <br /> TPH cumulative removal,gallons(c) 7325 <br /> (a)r'rom start-up through June. 1992 influent samples were not taken because there was no sample tap on the inlet to the catalytic oxidizer <br /> Therefore,the influent concentrations(in parts per million by volume)are an estimate <br /> (b)from St in-up through April 1992,concentrations measured it the catalytic oxidizer outlet were performed using an organic vapor monitor <br /> calibrated with isobutylene Effluent concentrations from July 24, 1991,through April 28, 1992,are reported in parts per million <br /> by vapor The dark line above June 30, 1992,indicates a change in reporting concentrations As of lune 30, 1992,concentrations are <br /> reported in micrograms per liter <br /> (c) Pounds extracted caluilation <br /> lbs/day—("x"pg/L)*(grant/1,000 000 99)*(]b/453 6 gram)*("y"cubic feet/min) *(1440 min/day)*(28 31 rJcubic feet <br /> where"x"is influent concentration and"y"cubic feet/min is 100 <br /> (d) For pounds cumulative removal we used the removal lb/day result and multiplied it by the difference in the number of days between the next sampling event <br /> (e)Gallons removal calculation(for TPH) <br /> gallons removed—lbs*gallon/6 2 lbs <br /> I <br />