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Valley Motors _2_ April 25, 2008 <br /> ' <br /> Claim No. 12540 <br /> B. Monitoring Well Information <br /> Well Designation Date Installed Screen Interval Most Recent DTW <br /> feet b s Dec 07 <br /> VM-1 Jul 96 ? 32.30 <br /> VM-2 Jul 96 ? 31.83 <br /> VM-3 Jul 96 ? 32.38 <br /> VM-4 Au 98 ? 31.67 <br /> VM-5 A r03 <br /> ? 31.92 <br /> VM-6 Apr 03 ? 31.99 <br /> VM-7 Apr 03 ? 31.40 <br /> VM-8 Apr 03 ? 31.98 <br /> • MTBE THREAT CLASSIFICATION: N <br /> • LAND USE DESIGNATION: residential and commercial <br /> • ESTIMATED WATER QUALITY OBJECTIVES (WQO'S) FOR SITE: Per the <br /> Water Quality Control Plan (Basin Plan) for.the Sacramento River Basin and the <br /> San Joaquin River Basin (Fourth Edition). <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) (mg/kg) Dec 07 <br /> TPH-g NA NA NA NA 110,000 16,500 5 <br /> TPH-d NA NA NA NA 9,680 NA 49 <br /> Benzene NA NA 0.64 1.4 10,000 19.5 0.15 <br /> Toluene NA NA 520 520 22,000 1,200 42 <br /> Eth (benzene NA NA 400 400 4,900 1,380 29 <br /> Xylenes NA NA 270 420 19,000 3,210 17 <br /> MTBE NA NA 32 70 1,140 NA 5 <br /> TBA NA NA NA NA NA NA 12 <br /> 1,2-DCA NA NA NA NA NA NA 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 Remediation: none identified <br /> • METHOD: soil vapor extraction <br /> • DURATION: 2005 through Nov 06 <br /> California En vlronmental Protection Agency <br /> P.a Recycled Paper <br />