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Cherokee Truck Stop -2- April 7, 2008 <br /> Claim No. 8109 <br /> • SOIL TYPES: interbedded and intermixed sand, silt, and clay <br /> B. Monitoring Well Information <br /> Well Designation Date Installed Screen Interval Most Recent DTW <br /> (feet b s) (Aug07 <br /> MW-2 Mar 01 65-85 62.82 <br /> MW-3 Mar 01 65-85 63.55 <br /> MW-4 Mar 01 65-85 62.70 <br /> MW-5 Mar 01 55-75 63.88 <br /> MW-6 Mar 01 55-75 63.75 <br /> MW-7 Dec 02 87-92 63.49 <br /> MW-8 Oct 05 65-75 63.44 <br /> MW-9 Oct 05 95-105 63.67 <br /> S11 Jun 06 70-100 63.57 <br /> S12 Jun 06 70-100 63.03 <br /> S13 Jun 06 70-100 - <br /> • MTBE THREAT CLASSIFICATION: X <br /> • LAND USE DESIGNATION: residential and commercial <br /> • ESTIMATED WATER QUALITY OBJECTIVES (WQO'S) FOR SITE: Perthe <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) (Aug07 <br /> TPH-g NA NA NA NA 3,400 300 5 <br /> TPH-d NA NA NA NA 350,000 <50 49 <br /> Benzene NA NA 0.64 1.4 17 <0.5 0.15 <br /> Toluene NA NA 520 520 13 <0.5 42 <br /> Eth (benzene NA NA 400 400 24 <0.5 29 <br /> Xylenes NA NA 270 420 200 <0.5 17 <br /> MTBE NA NA 32 70 8.3 110 5 <br /> TBA NA NA NA NA 9.6 <10 12 <br /> 1,2-DCA NA NA NA NA 510 350 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 /> California E'n vironm ewlalProlecliolr.Qgezicy <br /> P.a Recyc%dPnper• <br />