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i i • � � <br /> Table B-2 <br /> Dual-Phase Extraction Estimated Mass Removal <br /> Time Oil Company <br /> 14000 East Highway 88 <br /> Lockeford,CA <br /> TPH as Gasoline Benzene <br /> Average Incremental Cumulative Average Incremental Cumulative <br /> Hours Average Influent Pounds pounds Influent Pounds pounds <br /> Extracted Flow Rate Concentration Removed Removed Concentration Removed Removed <br /> Well ID (hours) (scfm) (ppmv)" (lbs)' (lbs)* (ppmv)° (lbs)' (lbs)* <br /> Int#1 290 380 420 773 773 19 003 003 <br /> Inf#2 220 488 360 005 778 2 000 003 <br /> Inf 43 110 395 1,400 1014 1792 5 003 006 <br /> Inf#4 115 462 950 824 2616 46 003 009 <br /> TOTAL HOURS EXTRACTED 735 <br /> TOTAL POUNDS REMOVED 2616 009 <br /> Explanations <br /> scfm=standard cubic feet per minute <br /> (ppmv)=parts per million by volume <br /> MTBE=Methyl-tenary butyl ether <br /> TPH=Total Petroleum Hydrocarbons <br /> Note <br /> Density of benzene=7 3 pounds per gallon <br /> Density of gasoline=61 pounds per gallon <br /> a=Values reported in both parts per million by volume(ppmv)and Mg/M3 by laboratory <br /> *Estimated mass removal calculations based on an average extraction rate of 20 scfm per well <br /> 770T 4391100 00011KMEPITime Oil Lockeford DPE Test Tables&Graphs As 518102 <br />