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-3- • September 2, 2010 <br /> Jerry and Marleta Castro <br /> Claim No. 12325 <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 /> Water u /L WQOs <br /> Contaminant Soil m /k Latest (ug/L) <br /> Maximum Latest Maximum Jun 2010 <br /> TPH- NA NA 200,000 220,000 56 <br /> NA NA NA <br /> TPH-d NA 11,000 600 0.15 <br /> Benzene NA 170 42 <br /> Toluene NA NA34,000 4,900 29 <br /> NA 20,000 17 <br /> Eth (benzene NA NA 26,000 34,000 <br /> X lenes NA 2 900 50 5 <br /> MTBE NA NA <br /> NA 12 <br /> TBA NA NA31 0.5 <br /> NA NA 220 15 <br /> 1,2-DCA NA NA NA <br /> Lead NA NA 0.06 <br /> PCE NA NA NA NA 0.8 <br /> TICE NA <br /> NA Not Analyzed,Not Applicable or Data Not Available <br /> woo 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: <br /> • METHOD 1: groundwater extraction events <br /> • DURATION: Jan 06 and October 06 <br /> VOLUME OF GROUNDWATER EXTACTED: 2,450 and 1,600 gallons <br /> • respectively. <br /> proposed, <br /> • METHOD . soil vapor <br /> extraction rd <br /> approvedwater extrac <br /> bY 13August 2010 letter fromSan Joaquin County LOP. <br /> California Environmental Protection Agency <br /> Zd Recycled Paper <br />