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JMarch 14., 2008 <br /> James Langston <br /> Claim No. 367 <br /> B. Monitoring Well Information <br /> Well Designation Date Installed Scrf et btsrval Most Dec 07 Recent DTW <br /> MW-1 Mar 99 ?-27 1539 <br /> MW-2 Mar 99 ?-27 15.70 <br /> MW-3 Mar 99 ?-27 15.65 <br /> MW-4 Mar 99 9-27 15.62 <br /> MW-5 Dec 00 ?-30 15.29 <br /> MW-6 Dec 00 ?-30 15.70 <br /> MW-7 Dec 00 ?-30 15.75 <br /> MW-8 Dec 00 ?-30 15.57 <br /> DPE-1 Jun 07 ?-25 15.31 <br /> DPE-2 Jun 07 ?-25 14.64 <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- NA NA NA NA 32,000 11,000 5 <br /> TPH-d NA NA NA NA NA I NA 49 <br /> Benzene NA NA 0.64 1.4 540 160 0.15 <br /> Toluene NA NA 520 520 480 26 42 <br /> Eth (benzene NA NA 400 400 2,000 73 29 <br /> Xylenes NA NA 270 420 11,000 120 17 <br /> MTBE NA NA 32 70 200 <1 5 <br /> TBA NA NA NA NA <25 <10 12 <br /> 1,2-DCA NA NA NA NA <0.5 5.5 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 /> Woo Water Quality Objectives <br /> V. FREE PRODUCT: none identified <br /> VI. SOIL AND GROUNDWATER REMEDIATION <br /> A. Soil Excavation: 3,000 tons of contaminated soil was excavated in Aug 95 <br /> California En vironmentai Protection Agency <br /> • P.a Recyc/ed Paper <br />