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Waterloo Food and Fue -3- May 28, 2008 <br />Claim No. 14120 <br />IV. MAXIMUM DOCUMENTED CONTAMINANT CONCENTRATIONS <br />Contaminant Soil (mg/kg) , PRGs Water (ug/L) VVQ0s <br />(ug/L) Maximum Latest Residential <br />(mg/kg) <br />Industrial <br />(mg/kg) <br />Maximum <br />' <br />Latest <br />(Sep 07) <br />TPH-g NA NA NA NA FP 200,000 5 <br />TPH-d NA NA NA NA FP NA 49 <br />Benzene NA NA 0.64 1.4 FP 23,000 0.15 <br />Toluene NA NA 520 520 FP 26,000 42 <br />Ethylbenzene NA NA 400 400 FP 5,000 29 <br />Xylenes NA NA 270 420 FP 33,000 17 <br />MTBE NA NA 32 70 FP 36,000 5 <br />TBA NA NA NA NA FP NA 12 <br />1,2-DCA NA NA NA NA FP 240 0.5 <br />Lead NA NA 400 800 NA NA 15 <br />PCE NA NA 17 130 NA NA 0.06 <br />TCE NA NA 0.11 110 NA NA 0.8 <br />PRGs USEPA Region 9 Preliminary Remediation Goals <br />MCL Maximum Contaminant Levels <br />AL Action Level <br />NA Not Analyzed, Not Applicable, or Data Not Available <br />WOO Water Quality Objectives <br />FP Free phase product <br />FREE PRODUCT: up to 0.47 feet of free phase product noted in site wells <br />SOIL AND GROUNDWATER REMEDIATION <br />Soil Excavation: 100 cubic yards of contaminated soil was excavated in <br />Feb 99. <br />In-Situ Soil Remediation: <br />METHOD: soil vapor extraction <br />DURATION: Dec 06 through present <br />TOTAL MASS REMOVED: 18,073 pounds of TPH-G <br />C. Groundwater Remediation: <br />METHOD: groundwater extraction <br />DURATION: May 03 through present <br />California Environmental Protection Agency <br />%cl Recycled Paper