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1 1 <br /> Table 3 <br /> Vapor Extraction System Start-Up Data <br /> Unocal Station No 6981 <br /> 4707 Pacific Avenue <br /> Stockton, CA <br /> Bestrnnin�I Date - -- <br /> Ending <br /> -- <br /> Ending Date 22-Sept 94 <br /> Total Operation (days) 0 <br /> Total Operation (hours) 0 <br /> Operational hours to Date 0 <br /> TPH-G Concentratrone <br /> Influent (ppmv) 2,000 <br /> Effluent (ppmv) <3 8 <br /> Benzene Concentrations <br /> Influent (ppmv) 44 <br /> Effluent (ppmv) <0 031 <br /> Flow Rates <br /> Influent from VEW (scfm) 143 <br /> Total intake (cfm) 231 <br /> TPH-G Extraction Data <br /> Extraction Rate (lbs/day) 69 38 <br /> Product Recovered (lbs) 0 <br />• Product Recovered to Date (lbs) 0 <br /> Product Recovered to Date (gal) 0 <br /> Benzene Extraction Data <br /> Extraction Rate (Ibslday) 1 83 <br /> Product Recovery (lbs) 0 <br /> Product Recovered to Date (lbs) 0 <br /> Product Recovered to Date (gal) 0 <br /> Emrssron Data <br /> TPH-g Emission Rate (lbs/day) <0 27 <br /> Benzene Emission Rate (lbs/day) <0 0026 <br /> TPH-g Destruction Efficiency (%) >99 81 <br /> Benzene Destruction Efficiency(°rb) X99 18 <br /> ppmv = parts per million by volume <br /> Vow = Vapor Extraction Wells lbs = pounds <br /> scfm = standard cubic feet per minute gal = gallons <br /> lbs/hr = pounds per operational hour NS = Not Sampled, Recovery data Calculated <br /> lbs/day = pounds per day ND = None Dectected Recovery data calculat <br /> NA = not Applicable <br /> NM = Not Measured <br /> Notes 1 Molecular weights used in recovery calculation are 65 for TPH-G and 78 for benzene <br /> 2 Densities used in recovery calculations are 6 0 lbs/gal for TPHG and 7 25 lbs/gal for benzen <br /> 3 Average influent and effluent rates are calculated <br /> 4 Total intake is as measured by the system and includes influent from VEW, as well as dilutio <br /> GeoStrategies Inc. <br /> Page 1 <br />