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Waterloo Food and Fuel -3- May 18, 2009 <br />Claim No. 14120 <br />IV. MAXIMUM DOCUMENTED CONTAMINANT CONCENTRATIONS <br />Contaminant Soil (mg/kg) ESLs Water (ug/L) WQ0s <br />(ug/L) Maximum Latest Shallow <br />Soil l <br />Residential <br />(mg/kg) <br />Industrial 2 <br />Dermal <br />(mg/kg) <br />Maximum Latest <br />(Jan 09) <br />TPH-g NA NA 83 450 FP 500 5 <br />TPH-d NA NA 83 450 FP NA 56 <br />Benzene NA NA 0.044 0.27 FP 5 0.15 <br />Toluene NA NA 2.9 210 FP 7.1 42 <br />Ethylbenzene NA NA 2.3 5.0 FP 16 29 <br />Xylenes NA NA 2.3 100 FP 48 17 <br />MTBE NA NA 0.023 65 FP 16 5 <br />TBA NA NA 0.075 320,000 FP 27,000 12 <br />1,2-DCA NA NA 0.0045 0.48 FP <0.5 0.4 <br />Lead NA NA 200 750 NA NA 15 <br />POE NA NA 0.37 0.95 NA NA 0.06 <br />TOE NA NA 0.46 4.1 NA NA 0.8 <br />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 />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, discontinued <br />TOTAL MASS REMOVED: 28,986 pounds of TPH-G (Sep 08) <br />RATE OF TPH-G REMOVAL: 4.76 pounds/hour <br />C. Groundwater Remediation: <br />METHOD: groundwater extraction <br />DURATION: May 03 through present <br />California Environmental Protection Agency <br />fO <br />Recycled Paper