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Frontier Transportation • -3- • May 9, 2008 <br /> Claim No. 12886 <br /> IV. MAXIMUM DOCUMENTED CONTAMINANT CONCENTRATIONS <br /> Contaminant Soil m k PRGs Water (ug/L WQOs <br /> Maximum Latest Residential Industrial Maximum Latest (ug/L) <br /> (mg/kg) m /k Dec 07 <br /> TPH-g NA NA NA NA FP. 33,000 5 <br /> TPH-d NA NA NA NA FP NA 49 <br /> Benzene NA NA 0.64 1.4 FP 2,120 0.15 <br /> Toluene NA NA 520 . 520 FP 683 42 <br /> Eth (benzene NA NA 400 400 FP 2,360 29 <br /> Xylenes NA NA 270 420 1 FP 6,500 17- <br /> _MTBE NA NA 32 70 FP 2,430 5 <br /> TBA NA NA NA NA FP <10 12 <br /> 1,2-DCA NA NA NA NA FP <0.5 0.5 <br /> Lead NA NA 400 800 FP 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 /> _.. FP Free Product <br /> V. FREE PRODUCT: sheen has been identified in monitoring wells MW-2, MW-3r, <br /> MW-21, MW-22, MW-23, and MW-24. <br /> VI. SOIL AND GROUNDWATER REMEDIATION <br /> A. Soil Excavation: unknown volume <br /> B. In-Situ Soil Remediation: none identified <br /> • METHOD: soil vapor extraction <br /> • DURATION: Jan 00 through present <br /> C. Groundwater Remediation: none identified <br /> California En vironmentalP�oiection Agency <br /> A <br /> �.a iPeryc%d Paper <br />