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! i • <br /> APPENDIX K <br /> POST-REMEDIATION <br /> ESTIMATED MASS CALCULATIONS IN SOIL AND GROUNDWATER <br /> Jackpot Food Mart <br /> 14000 East Highway 88 <br /> Lockeford,California <br /> TPHg MASS IN GROUNDWATER <br /> These mass calculations are based on the average of TPHg concentrations during operation of the SVEIAS system <br /> Estimated area is the same estimated area used to compute pre-remediation TPHg mass estimates (SECOR, <br /> September 8, 1998, Appendix M) <br /> Assume impacted water column extends from 72 to 100 feet bgs, a thickness of 28 feet <br /> AREA 1 (Vicinity of Well MW-1) 2,800 ft2 <br /> CONTAMINANT TPHg <br /> X -CONTAMINANT CONCENTRATION (mg/L) = 359 <br /> N - POROSITY(%) = 02 <br /> A- IMPACTED AREA(ft^2) = 2,800 <br /> H - HEIGHT OF IMPACTED AREA(ft) = 28 <br /> P - POUNDS OF CONTAMINANT (Ibs) = 35.14 <br /> Estimated Total Mass of Dissolved Hydrocarbons 3514 pounds +I-50% 17 6 to 52 7 lbs <br /> Estimated Volume of Dissolved Hydrocarbons 5 0 gallons 50% 2 5 to 75 gal <br /> I TrojectsMme OikockeforM`rableslSCM&Asmt This AslApx K Mass Calcs Page 2 of 2 <br />