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• r <br /> Ripon Farm Service -2- <br /> April 7, 20 <br /> Claim No. 8431 8 {r <br /> B. Monitoring Well Information <br /> Well Designation Date Installed Screen Interval Most Recent DTW <br /> feet bgs Aug 07 - <br /> MW-1 Ma 94 14-34 23.43 <br /> MW-2 May 94 14-34 23.38 <br /> Mull-3 May 94 15-35 22.88 <br /> MW-4 Oct 95 15-35 23.62 <br /> MW-5 Oct 95 15-35 23.60 <br /> MW-6 May 98 15-30 _ <br /> MW-7 May 98 15-30 <br /> MW-8 Ma 98 15-30 - <br /> MW-9 May 05 15-30 25.60 <br /> MW-10 May 05 15-35 25.52 <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 WQ0s <br /> Maximum Latest Residential Industrial Maximum Latest (ug/L) <br /> (mg/kg) (mg/kg) Au 07 <br /> TPH-g NA NA NA NA 14,000 <50 5 <br /> TPH-d NA NA, NA NA 12,000 NA 49 <br /> Benzene NA NA 0.64 1.4 1,500 X0.5 0.15 <br /> Toluene NA NA 520 520 130 <0.5 42 <br /> Eth lbenzene NA NA 400 400 580 <0.5 29 <br /> Xylenes NA NA 270 420 1,700 <0.5 17 <br /> MTBE NA NA 32 70 560 15 5 <br /> TBA NA NA NA NA 190 <10 12 <br /> 1,2-DCA NA NA NA NA 78 2.4 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 /> WQO 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: none identified <br /> CalrforniaEli virowmerrtal f1-o1ec1roN.4'gewcy <br /> Z,5 Recycled Paper <br />