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0 0 0 - Table 5. Summary of Soil Vapor Extraction and Treatment System Data, ARCO Station 2133, Stockton, California Continuous operation began on 1/1 1/95 Sample Average flow Days in Down days Percent Influent concentration,ppfnv Removal rate,lbs/day Net removal,lbs& gallons date Period rate,cfm period in period olLerational TPH-G B TPH-G B TPH-G 13 1/11/95 Source test 100 1 00 100% 590 17 221 005 22 lbs 00 lbs 2/9195 1111/95-2/9/95 80 29 10 97% 480 45 144 Oil 403 lbs 29 lbs 3/28/95 2/9/95-3/28/95 80 47 340 28% 160 062 48 001 62 lbs 02 lbs 4/4195 3128195-4/4/95 80 7 00 100% 190 047 57 001 40 lbs 0 1 lbs 5/3/95 414/95-5/3/95 100 29 10 97% 460 12 172 035 482 - lbs 98 lbs 5/15/95 513/95-5115/95 100 12 05 96% 340 88 127 026 146 Ibs 30 lbs 6/12195 5115/95-6112/95 100 28 30 89% 240 18 90 005 225 lbs 13 1 b 718/95 6/12/95-7/8195 100 26 00 100% 140 <0016 52 000 136 lbs 00 lbs 8/22/95 7/8195-8/22195 80 45 00 100% 1200 41 359 096 1618 lbs 43 1 lbs 9/19195 8/22/95-9/19/95 100 28 00 100% 480 <0 016 180 000 503 lbs 00 lbs Totals and averages 6/12195-9/19/95 93 99 00 100% 607 41 197 032 2257 lbs 43 1 lbs for reporting period 364 gals 5 9 gals Totals and averages 1/11/95-9/19/95 92 252 40 84% 428 99 145 0 18 3637 lbs 604 lbs cumulative 587 gals 8 3 gals Sample calculations Removal rate calculation Ibs/day-(gm/mole)*(umolelmole)*(moles/IOE+6 umoles)*(10E+3 mglgm)*(1 177 mole/cubic feet)*(2 204640E-6 lb/mg)*(60 mm/hr)*(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)