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• <br />%-MVIVUrlwuLw�UIILr y rag, <br />Former Chevron Service Station #9-5775, 301 West Kettleman Lane, Lodi, California January 11, 2002 <br />SVE operability exceeded 98.9% during the 4'h quarter. Table 5 and 5.1 present operational <br />measurements and calculated mass removal rates for TPHg and benzene, and MtBE, <br />respectively. <br />During the 4'h quarter, the SVE system removed approximately 65.4 pounds of TPHg, 0.1 <br />pounds of benzene, and 4.2 pounds MtBE. Since operation began, the SVE system has <br />removed an estimated 4,095.3 pounds of TPHg, 85.3 pounds of benzene, and 443.8 pounds <br />of MtBE. Mass removal trends and influent soil vapor TPHg, benzene, and MtBE <br />concentrations versus time are shown on Figures 8 and 9, respectively. <br />SVE system emission data is presented in Table 6. <br />3.3 Estimated Mass of Hydrocarbons in Soil and Groundwater <br />The hydrocarbon mass estimates presented below are an update of results presented within <br />the Problem Assessment Report / Final Remediation Plan (PAR/FRP) Addendum, dated June <br />5, 2001 and sections 3.1 and 3.2 above. Methodology for determining the mass of <br />hydrocarbons adsorbed to soil and dissolved in groundwater can be found within the <br />PAR/FRP Addendum. <br />3.3.1 Estimated Mass of Petroleum Hydrocarbons Adsorbed in Soil <br />The results presented below are based on the calculation.presented within the PAR/FRP <br />Addendum and cumulative 4h quarter 2001 SVE mass removal data. This information is <br />summarized in the following table: <br />lAChevron1957751Periodic MonitoringlQuarterly Progress Reponsl4thQuarter 200114th Quarter -2001 Progress Report.doc <br />Maximum ;Constitient(Concelitratton (p "mqO, <br />Satnpling <br />;' Sep'teiri6er,19 through.Deceiritier'=19;{2001 <br />? <br />Location ` <br />TPHg <br />'Benzene � <br />Toluene' <br />Ethyl= <br />Xylenes <br />1VItBE- <br />benzene <br />INFL <br />24 <br /><0.050 <br />0.31 <br />0.33 <br />4.5 <br />0.5 <br />EFFL <br />10 <br /><0.050 <br />0.11 <br />0.13 <br />1.8 <br />0.12 <br />Explanations: <br />ppmv = Parts per million by volume <br />< Indicates the constituent was not present at or above the method reporting limit shown <br />SVE operability exceeded 98.9% during the 4'h quarter. Table 5 and 5.1 present operational <br />measurements and calculated mass removal rates for TPHg and benzene, and MtBE, <br />respectively. <br />During the 4'h quarter, the SVE system removed approximately 65.4 pounds of TPHg, 0.1 <br />pounds of benzene, and 4.2 pounds MtBE. Since operation began, the SVE system has <br />removed an estimated 4,095.3 pounds of TPHg, 85.3 pounds of benzene, and 443.8 pounds <br />of MtBE. Mass removal trends and influent soil vapor TPHg, benzene, and MtBE <br />concentrations versus time are shown on Figures 8 and 9, respectively. <br />SVE system emission data is presented in Table 6. <br />3.3 Estimated Mass of Hydrocarbons in Soil and Groundwater <br />The hydrocarbon mass estimates presented below are an update of results presented within <br />the Problem Assessment Report / Final Remediation Plan (PAR/FRP) Addendum, dated June <br />5, 2001 and sections 3.1 and 3.2 above. Methodology for determining the mass of <br />hydrocarbons adsorbed to soil and dissolved in groundwater can be found within the <br />PAR/FRP Addendum. <br />3.3.1 Estimated Mass of Petroleum Hydrocarbons Adsorbed in Soil <br />The results presented below are based on the calculation.presented within the PAR/FRP <br />Addendum and cumulative 4h quarter 2001 SVE mass removal data. This information is <br />summarized in the following table: <br />lAChevron1957751Periodic MonitoringlQuarterly Progress Reponsl4thQuarter 200114th Quarter -2001 Progress Report.doc <br />