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Rogor Huckins Jr. -3- May 19, 2008 <br /> Claim No. 12186 <br /> IV. MAXIMUM DOCUMENTED CONTAMINANT CONCENTRATIONS <br /> Contaminant Soil m /k PRGs Water (ug/L Woos <br /> Maximum Latest Residential Industrial Maximum Latest (ug/L) <br /> (mg/kg) m /k Oct 07 <br /> TPH-g NA NA NA NA 290,000 46,000 5 <br /> TPH-d NA NA NA NA 500 NA 49 <br /> Benzene NA NA 0.64 1.4 64,000 11,000 0.15 <br /> Toluene NA NA 520 520 90,000 1,200 42 <br /> Eth (benzene NA NA 400 400 16,000 2,100 29 <br /> Xylenes NA NA 270 420 37,000 7,700 17 <br /> MTBE NA NA 32 70 100 <1 5 <br /> TBA NA NA NA NA 370 <10 12 <br /> 1,2-DCA NA NA NA NA 4,600 120 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 /> WQO Water Quality Objectives <br /> V. FREE PRODUCT: none identified <br /> VI. SOIL AND GROUNDWATER REMEDIATION <br /> A. Soil Excavation: unknown volume <br /> B. In-Situ Soil Groundwater Remediation: <br /> METHOD: soil vapor extraction and air sparging have been approved by <br /> regulators <br /> C"Ornin En vironmenta/Protection Agency <br /> Qt RecycJ d Paper <br />