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Grant Family Trust -2- `''I May 28, 2008 , <br /> Claim No. 8590 <br /> B. Monitoring Well Information <br /> Well Designation Date Installed Screen Interval Most Recent DTW <br /> feet b s Jan 08 <br /> MW-1 ? ? 7.37 <br /> MW-2 ? ? 8.71 <br /> MW-3 ? ? 8.33 <br /> MW-4 ? ? 7.02 <br /> MW-5 ? ? 8.19 <br /> MW-6 ? ? 8.14 <br /> MW-7 ? ? 7.93 <br /> MW-8 ? ? 8.20 <br /> • MTBE THREAT CLASSIFICATION: C <br /> • LAND USE DESIGNATION: commercial/ industrial <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 /> m /k (mg/kg) Jan 08 <br /> TPH-g NA NA NA NA NA 3,500 5 <br /> TPH-d NA NA NA NA NA NA 49 <br /> Benzene NA NA 0.64 1.4 NA 1,800 0.15 <br /> Toluene NA NA 520 520 NA 28 42 <br /> Eth (benzene NA NA 400 400 NA 190 29 <br /> Xylenes NA NA 270 420 NA 293 17 <br /> MTBE NA NA 32 70 NA 31 5 <br /> TBA NA NA NA NA NA <25 12 <br /> 1,2-DCA NA NA NA NA NA <2.5 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: unknown volume <br /> B. In-Situ Soil/ Groundwater Remediation: none identified <br /> California Environmental Protection Agency <br /> ZJ'Rccyc%d Paper <br />