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BJJ Co. -2- J April 7, 2008 <br /> Claim No. 380 <br /> B. Monitoring Well Information <br /> Well Designation Date Installed Screen Interval Most Recent DTW <br /> feet b s Jul 07 <br /> MW-1 Jun 98 ? 6.25 <br /> MW-2 May 98 ? 5.78 <br /> MW-3 Nov 98 ? 6.51 <br /> MW-4 Nov 98 ? 6.13 <br /> MW-5 Nov 98 ? 6.76 <br /> MW-6 Nov 98 ? 6.17 <br /> MW-7 Oct 00 ? 6.28 <br /> MW-8 Oct 00 ? 6.05 <br /> • MTBE THREAT CLASSIFICATION: X <br /> • LAND USE DESIGNATION: 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 /kPRGs Water (ug/L WQOs <br /> Maximum Latest Residential Industrial Maximum Latest (ug/L) <br /> (mg/kg) Jul 07 <br /> TPH- NA NA NA NA 170,000 21,000 5 <br /> TPH-d NA NA NA NA NA NA 49 <br /> Benzene NA NA 0.64 1.4 940 170 0.15 <br /> Toluene NA NA 520 520 4,700 1,000 42 <br /> Eth lbenzene NA NA 400 400 4,900 1,400 29 <br /> X lenes NA NA 270 420 13,000 2,300 17 <br /> MTBE NA NA 32 70 NA NA 5 <br /> TBA NA NA NA NA NA NA 12 <br /> 1,2-DCA NA NA NA NA NA NA 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: unknown volume <br /> B. In-Situ Soil Remediation: none identified <br /> California Environmental Protection Agency <br /> Pia Recycled Paper <br />