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Harry's Auto Mart -2- May 7, 2008 <br /> Claim No. 15094 <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 Dec 07 <br /> MW-1 Feb 01 ?-63 50.58 <br /> MW-2 Feb 01 ?-60 1 49.84 <br /> MW-3 Feb 01 ?-60 20.23 <br /> MW-4 Feb 01 ?-60 49.98 <br /> MW-5 Dec 03 ?-76 48.87 <br /> MW-6 Dec 03 ?-75 49.31 <br /> MW-7 Dec 03 ?-76 48.83 <br />` MW-1d Dec 03 ?-101 50.56 <br /> • MTBE THREAT CLASSIFICATION: C <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 280,000 120,000 5 <br /> TPH-d NA NA NA NA NA NA 49 <br /> Benzene NA NA 0.64 1.4 25,000 14,000 .0.15 <br /> Toluene NA NA 520 520 34,000 15,000 42 <br /> Eth (benzene NA NA 400 400. 11,000 3,500 29 <br /> Xylenes NA NA 270 420 44,000 19,000 17 <br /> MTBE NA NA 32 70 140 57 5 <br /> TBA NA NA NANA 130 <500 12 <br /> 1,2-DCA NA NA NA NA 1,700 1,700 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/ Groundwater Remediation: none identified <br /> California Environmenta/Protection Agency <br /> P.d Recyc%dPeper <br />