ARCHIVED REPORTS_XR0003706 - Laserfiche WebLink

Home Browse Search

Table 4. Summary of Soil Vapor Extraction and Treat*System Data,ARCO Station 434,Lodi,California Start-up date: 613/91 Sample Average flow Days in Down days Percent Influent concentration,ppmv(a) Removal rate,lbs/day Net removal,lbs& alions date Period rate,cfm eriod in period operational TPH-G B TPH-G B TPH-G B 6/7/94 5/2/94-6/27/94 62 56 0 100% 110 <0.016 3 0 143 lbs 0 lbs 7/6/94 6/27/94-7/6/94 62 9 0 100% 210 <0.016 5 0 44 lbs 0 lbs 8/16/94 7/6/94-8/16/94 62 41 3 93% 261 1.9 6 0 230 lbs 0 lbs 9/9/94 8116/94-9/27/94 63 42 1 98% 230 <0.016 5 0 221 lbs 0 lbs 10/4/94 9/27/94-10/4/94 62 7 0 100% 130 <0.007 3 0 21 lbs 0 lbs 11/3/94 10/4/94-11/3/94 62 30 1 97% 340 <0.083 8 0 228 lbs 0 lbs 12/9/94 11/3/94-12/27/94 62 54 2 96% 110 <0.012 3 0 132 lbs 0 lbs Totals and averages 9/27/94-12/27/94 62 91 3 97% 193 <0.083 4 0 381 lbs 0 lbs for reporting period 61 gals 0 gals .......................................................................................................... ................................................................................................... ............................................................................................................................................................. Totals and averages 6/3/91-12/27/94 93 1303 68 95% 1380 8 52 0 7296 lbs 79 lbs cumulative 1177 gals Il gals Sample calculations: Removal rate calculation: lbs/day=("x"ppmv)*(molecular weight)*("y"cubic feet/min)*(1.557*I OE-7)*(24 hrs/day) where"x"is influent concentration and"y"is average flow rate,cfm For pounds cumulative removal we used the removal lb/day result and multiplied it by the difference in the number of days between the current and previous sampling event. Gallons removal calculation(for TPH): gallons removed=lbs*gallon/6.2 lbs(density for TPH-G is 6.2;however,for Benzene it is 7.32) (a)From start-up through June 1992 influent samples were not taken because there was no sample tap on the inlet to the catalytic oxidizer. Therefore,the influent concentrations(in parts per million by volume)are an estimate. i