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0 <br /> Table 1. Soil Vapor Extraction and Treatment System Influent Data <br /> ARCO Station 2093, Tracy, California <br /> Start-up date 1/4/96 <br /> Sample Average flow Days in Down days Percent Influent concentration,ppmv Removal rate,lbs/day Net removal,lbs&gallons <br /> date Period rate,cfin period in period operational TPH-G B TPH-G B TPH-G B <br /> 12/15/95 Source test -- -- -- 1200 570 70 05 -- lbs -- Ibs <br /> 114/96 Startup 95 20 196 2% 1455 -- 52 -- 22 lbs - lbs <br /> 1126/96 114196-1/26/96 95 22 01 99% 931 33 -- 722 lbs -- lbs <br /> 2/26/96 1126196-2/26/96 75 31 22 31% 713 -- 20 -- 189 Ibs - lbs <br /> 3127196 2/26/96-3127/96 75 30 30 2% 713 -- 20 9 lbs -- lbs <br /> 4115/96 3/27196-4115196 74 19 0 100% 605 -- 17 -- 317 lbs Ibs <br /> 5/2196 4/15/96-5/2/96 76 17 11 36% 584 17 - 103 lbs -- Ibs <br /> 5115/96 512/96-5115196 60 13 3 81% 582 -- 13 -- 137 lbs -- lbs <br /> 613/96 5115/96-6/3/96 63 19 11 41% 482 11 -- 89 Ibs -- lbs <br /> 6121196 5/15/96-6/21/96 70 37 35 8% 533 14 21 Ibs -- Ibs <br /> 7/10/96 6121/96-7/10/96 65 37 32 28% 639 -- 16 -- 81 lbs - Ibs <br /> 8/12/96 7110196-8/12/96 68 52 50 7% 1000 25 - 60 lbs -- lbs <br /> 9/16/96 8112/96-9116/96 80 68 61 21% 702 -- 21 157 lbs -- lbs <br /> 10/8/96 9116/96-10/8/96 60 22 20 9% 486 -- 11 -- 21 lbs -- lbs <br /> 11/5196 10/8/96-1115/96 60 28 7 74% 92 -- 2 -- 43 lbs - lbs <br /> 12/20/96 1115196-12120/96 63 45 37 18% 58 -- 1 -- II Ibs -- lbs <br /> 1/13/97 12/20196-1/13/97 55 24 6 75% 23 - 1 -- 9 lbs lbs <br /> System shut off 1/13197-6/18/97 <br /> 6/18197 6118/97-6/30/97 45 12 5 61% 370 6 -- 45 lbs - lbs <br /> 7/24/97 6130/97-7/24197 60 24 23 4% 202 -- 5 5 Ibs -- lbs <br /> 8128/97 7124/97-8128/97 60 35 34 3% 196 -- 4 -- 4 Ibs -- Ibs <br /> 9/10/97 8128197-9130/97 60 33 31 1% 180 -- 4 8 lbs -- lbs <br /> Totals and averages 6/30/97-9/30/97 60 92 88 4% 193 -- 4 -- 17 lbs lbs <br /> for reporting period 3 gals gals <br /> Totals and averages 12/15195-9/34/97 68 744 592 20% 559 -- 17 -- 2054 lbs -- Ibs <br /> cumulative 331 gals -- gals <br /> --=Not available or not applicable <br /> Sample Calculations <br /> Mass extraction rate calculation <br /> Ibslday=("x"ppm)* (I E-6)* (molecular weight lb/lb-mol)*("y"cubic feet/min)* (24 hr/day)*(60 mm/hr)*(lb-mol/380 cubic feet) <br /> where"x"is influent concentration in ppm and"y"is the flow rate in cubic fcet/min <br /> For pounds cumulative removal,the removal lb/day result is multiplied by the number of days between sampling events <br /> Gallons removal calculation(for TPH) <br /> gallons removed=lbs*gallon/6 2 lbs <br /> tE%ARC0SM%Workeopyti8 WVes2093 xiw) <br />