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Frontier Transportation -3- April 30, 2009 <br /> Claim No. 12886 <br /> IV. MAXIMUM DOCUMENTED CONTAMINANT CONCENTRATIONS <br /> Contaminant Soil m /k ESLs Water (ug/L WQOS <br /> Maximum Latest Shallow Industrial2 Maximum Latest (ug/L) <br /> Soil Dermal (Sep 08) <br /> Residential <br /> (mg/kg) (mg/kg) <br /> TPH-g NA NA 83 450 FP 67,000 5 <br /> TPH-d NA NA 83 450 FP NA 56 <br /> Benzene NA NA 0.044 0.27 FP 2,100 0.15 <br /> Toluene NA NA 2.9 210 FP 560 42 <br /> Eth (benzene NA NA 2.3 5.0 FP 3,200 29 <br /> Xylenes NA NA 2.3 100 FP 6,900 17 <br /> MTBE NA NA 0.023 65 FP 11,000 5 <br /> TBA NA NA 0.075 320,000 FP 800 12 <br /> 1,2-DCA NA NA 0.0045 0.48 FP <10 0.4 <br /> LeadNA NA 200 750 FP NA 15 <br /> PCE NA NA 0.37 0.95 NA NA 0.06 <br /> TCE NA NA 0.46 4.1 NA NA 1 0.8 <br /> 1 Environmental Screening Levels(ESLs)Shallow Soil<3m,Groundwater is source of Drinking Water. <br /> 2 ESLs,Shallow Soil Screening Levels,Groundwater not source of Drinking Water,Commercial Use, Direct Exposure, <br /> Worker <br /> NA Not Analyzed, Not Applicable,or Data Not Available <br /> Woo Water Quality Objectives <br /> FP Free phase product in site wells <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 Environmental Protection Agency <br /> A <br /> ed Recyc%d Paper <br />