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Table 1. Soil Vapor Extraction and Treatment System Influent Data ARCO Station 2093, Tracy, California Start-up dale: 1/4196 Sample Average flow Days in Down days Percent Influent concentration,pprnv Removal rate,lbs/day Net renlovaFibs&gallons date Period rate,clin period in period operational T1111-G B TPl l-G !3 TPM-G 13 12/15/95 Source test NA NA NA NA 1200 57.0 70 0.5 NA lbs NA lbs. 1/4/96 Startup 95 20 19.6 2% 1455 NM 52 NM 22 lbs NA lbs 1/26/96 1/4196-1126/96 95 22 0.1 99% 931 NM 33 NM 722 lbs NA lbs 2126/96 1/26/96-2/26/96 75 31 22 31% 713 NM 20 NM 189 lbs NA lbs 3/27/96 2126196-3127196 75 30 30 2% 713 NM 20 NM 9 lbs NA IUs 4/15/96 3127196-4115/96 74 19 0 100% 605 NM 17 NM 317 lbs NA lbs 5/2/96 4/15/96-5/2196 76 17 11 36% 584 NM 17 NM 103 lbs NA lbs 1 5/15/96 512196-5115/96 60 13 3 81% 582 NM 13 NM 137 lbs NA lbs 613/96 5/15196-6/3/96 63 19 11 41% 482 NM 11 NM 89 lbs NA lbs 6121196 5/15196-6121'196 70 37 28 25% 533 NM 14 NM 131 lbs NA lbs Totals and averages 4/15196-6121/96 69 105 52 50% 557 NA 14 NA 776 lbs 0 lbs for reporting period 125 gals 0 gals Totals and averages '12/15/95-6/21/96 76 208 123 41% 780 57 27 0.5 1718 lbs 0 lbs cumulative 277 gals 0 gals 7 :.:. . :-NM_=.not measured. —.m Sample calculations: . Removal rate calculation: Ibs/day=(gm/mole)*1bs/day=(gm/mole)*(untole/mole)*(moles110E+6 umoles)*(10E+3 mg/gm)*(1.177 mole/cubic feet)*(2.20464OC-6 IWin g)*(60 min/hr)*(cubic tcet/nlin)*(24 hrs/da ) where(gm/mole)is molecular weight:(umoles/mole)is ppm influent concentration;molecular weights ofTPH-G and Benzene are 100.2 and 78.1,respectively For pounds cumulative removal we used the removal Ib/day result and multiplied it by the dilTerence in the number of days between the current and previous sampling event. Gallons removal calculation: gallons removed=lbs* gallon/density in lbs(density for TPII-G is 6.2,benzene is 7.32) k� I fE:IARCO$M%WvrkcopyNG 1955VES2093.XLWt 5