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i <br /> T&T Trucking -2- April 30, 2009 <br /> Claim No. 10934 <br /> B. Monitoring Well Information <br /> Well Designation Date Installed Screen Interval Most Recent DTW <br /> feet b s Oct 08 <br /> MW-1 Aug95 70-90 80.55 <br /> MW-2 Aug95 65-80 Dry <br /> MW-3 Aug95 65-80 Dry <br /> MW-4 Aug95 60-80 D <br /> • MTBE THREAT CLASSIFICATION: A <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 /kg) ESLs Water (u/L WQOS <br /> Maximum Latest Shallow industrial' Maximum Latest (ug/L) <br /> Soil 4 (Oct 08) <br /> Residential Dermal <br /> m Ik (mg/kg) <br /> TPH-g NA NA 83 450 8,500 24,000 5 <br /> TPH-d NA NA 83 450 NA NA 56 <br /> Benzene NA NA 0.044 0.27 <2,000 <0.5 0.15 <br /> Toluene NA NA 2.9 210 <2,00 <0.5 42 <br /> Eth (benzene NA NA 2.3 5.0 <2,00 <0.5 29 <br /> Xylenes NA NA 2.3 100 <2,00 <0.6 17 <br /> MTBE NA NA 0.023 65 87,000 21,000 5 <br /> TSA NA NA 0.075 320,000 2,300 <10 12 <br /> 1,2-DCA NA NA 0.0045 0.48 NA NA 0.4 <br /> Lead NA NA 200 750 NA NA 15 <br /> PCE NA NA 0.37 0.95 NA NA 0.06 <br /> TCE NA NA 0.46 4.1 NA NA 0.8 <br /> 1 Environmental Screening Levels(ESLs)Shallow Soil<3m,Groundwater is source of Drinking Water. <br /> -2 ESLs,Shallow Soil Screening Levels,,-Groundwater not source of Drinking Water,Commercial Use, Direct Exposure, <br /> Worker <br /> NA Not Analyzed, Not Applicable,or Data Not Available <br /> WQO Water Quality Objectives <br /> FP Free phase product in site wells <br /> V. FREE PRODUCT: none identified <br /> VI. SOIL AND GROUNDWATER REMEDIATION <br /> A. Soil Excavation: unknown volume <br /> California Environmental Protection Agency <br /> P.,�Recycled Paper <br />