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R&L Business Manage, -nt -2- 1 May 30, 2008 <br /> Claim No. 8828 <br /> B. Monitoring Well Information <br /> Well Designation Date Installed Screen Interval Most Recent DTW <br /> feet b s Se 07 <br /> MW-1 Dec 95 40-60 26.80 <br /> MW-2 Dec 95 - 27.46 <br /> MW-3 Dec 95 36-56 28.04 <br /> MW-4 Dec 95 25-45 26.68 <br /> MW-5 Dec 97 25-45 26.97 <br /> MW-6 Dec 98 70-80 27.55 <br /> MW-7 Jan 00 70-80 27.58 <br /> .MW-8 Jan 00 70-80 . 26.38 <br /> VW1 Dec 96 25-45 28.14 <br /> VW2 Dec 96 25-45 27.74 <br /> VW3 Dec 96 25-45 27.53 <br /> VW4 Dec 96 25-45 27.90 <br /> EW1 Jun 03 30-60 - <br /> EW2 Jun 03 30-60 27.19 <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 /kg) PRGs Water (ug/L WQOs <br /> Maximum Latest Residential Industrial Maximum Latest (ug/L) <br /> (m9/k9 (mg/kg) Se 07 <br /> TPH-g NA NA NA NA 260,000 <50 5 <br /> TPH-d NA NA NA NA NA NA 49 <br /> Benzene NA NA 0.64 1.4 41,000 <0.5 0.15 <br /> Toluene NA NA 520 520 58,000 <0.5 '42 <br /> 'Eth lbenzene NA NA 400 400 18,000 <0.5 29 <br /> Xylenes NA NA 270 420 24,000 <0.5 17 <br /> MTBE NA NA 32 70 1,100 6.6 5 <br /> TBA NA NA NA NA 47 NA 12 <br /> 1,2-DCA NA NA NA NA ND NA 0.5 <br /> Lead NA NA 400 800 NANA 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 /> Cs rornia Environmental Protection Agency <br /> • Z,'}Recycled Paper <br />