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• 0 • . Table 5 Summary of Soil Vapor Extraction and Treatment System Data,ARCO Station 2133,Stockton,California Continuous operation began on 1111195 Sample Average flow Days in Down days Percent Influent concentration,ppmv Removal rate,lbs/day Net removal,lbs&gallons date Period rate,cfm period in period operational TPH-G B TPH-G B TPH-G B 1111195 Source test 100 l 00 100% 590 17 22 1 005 22 lbs 00 lbs 2/9/95 1111195-219195 80 29 10 97% 480 45 144 Oil 403 lbs 29 lbs 3/28/95 2/9/95-3128/95 80 47 370 21% 160 0 7 48 002 48 lbs 02 lbs Totals and averages 1111195-3128195 87 77 38 51% 410 2 138 006 473 lbs 3 2 lbs for reporting period 76 gals 04 gals Totals and averages 1/11195-3128195 87 77 38 51% 410 2 138 006 549 lbs 36 lbs cumulative 89 gals 05 gals Sample calculations Removal rate calculation lbs/day=(gm/mole)*(umolelmole)*(moles110E+6 umoles)*(10E+3 mg/gm)*(1 177 mole/cubic feet)*(2 204640E-6 lb/mg)*(60 minlhr)*(cubic feet/min)*(24 hrs/day) where(gm/mole)is molecular weight,(umoles/mole)is ppm influent concentration,molecular weights of TPH-G and Benzene are 100 2 and 78 1,respectively 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 gallons removed=lbs*gallon/density in lbs(density for TPH-G is 6 2,benzene is 7 32)