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Harry's Auto Mart -2- August 2, 2010 <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) (May 2010 <br /> MW-1 Feb 01 ?-63 49.28 <br /> MW-2 Feb 01 ?-60 48.90 <br /> MW-3 Feb 01 ?-60 48.95 <br /> MW-4 Feb 01 ?-60 48.67 <br /> MW-5 Dec 03 ?.-76 47.57 <br /> MW-6 Dec 03 ?-75 48.00 <br /> MW-7 Dec 03 ?-76 47.62 <br /> MW-1d Dec 03 ?-101 49.28 <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 Water (ug/L WQOs <br /> Maximum Latest Maximum Latest (ug/L) <br /> (May2010 <br /> TPH-g NA NA 280,000 120,000 5 <br /> TPH-d NA NA NA NA 56 <br /> Benzene NA NA 25,000 8,200 0.15 <br /> Toluene NA NA 34,000 9,500 42 <br /> Eth (benzene NA NA 11,000 4,900 29 <br /> Xylenes NA NA 44,000 19,600 17 <br /> MTBE NA NA 140 <1 5 <br /> TBA NA NA 130 <10 12 <br /> 1,2-DCA NA NA 1,700 600 0.4 <br /> Lead NA NA NA NA 15 <br /> PCE NA NA NA NA 0.06 <br /> TCE NA NA NA NA 0.8 <br /> NA Not Analyzed,Not Applicable,or Data Not Available <br /> WQO Water Quality Objectives <br /> FP Free phase product in site wells <br /> V. FREE PRODUCT: none identified <br /> VI. SOIL AND GROUNDWATER REMEDIATION <br /> A. Soil Excavation: unknown volume <br /> California Environmental Protection Agency <br />