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March 5, 2009 <br /> Central CA Traction Co <br /> Claim No. 16496 <br /> B. Monitoring Well InformationTW <br /> Date Installed Screen Interval Most Recent D' <br /> 7VV_elI Designation t �S) Jun 08) <br /> (fee <br /> 35-5 <br /> Sep 00 <br /> j�f W-2 <br /> Se 00 <br /> 35-50 <br /> MW-3 Sep 00 <br /> MW-4 Nov 01 <br /> ? <br /> MW-5 Jun 08 9 <br /> ? <br /> Jun 08 <br /> MW-6 <br /> 50.98 <br /> MW-7 Jun 08 <br /> • MTBE THREAT CLASSIFICATION- X <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) ESLs Water.(yq VVID�Os <br /> Maximum Latest Shallow Industrial 2 Maximum Latest (ug/L) <br /> (1999) Soil, (Jun 08) <br /> Residential Dermal <br /> rrig/kg) (mg/kg) <br /> TPH-g NA_ NA 83 450 2,000 <50 5 <br /> TPH-d 22,000 12,000 83 450 94,000 320 56 <br /> Benzene_ 12 28 0.044 0.27 28 0.77 015 <br /> Toluene 11 NA 2.9 210 22 <0.5 42 <br /> Ethylbenzene61 NA 2.3 5.0 550 <0.5 29 <br /> Xylenes <1.2 NA --2.3 100 2,400 <0.5 17 <br /> MTBE <1.2 NA 0.023 65 35 <0.5 5 <br /> TBA NA NA 0.075 320,000 <5 NA 12 <br /> 1,2-DCA NA NA 0.0045 0.48 <1 NS 0.4 <br /> Lead NA NA 200 750 NA NS 15 <br /> PCE NA NA 037 0.95 NA NA 0.06 <br /> TCE NA NA 0.46, 4.1 NA NA 08 <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 /> WOO Water Quality Objectives <br /> FP Free phase product in site wells <br /> V. FREE PRODUCT: none identified <br /> V1. SOIL AND GROUNDWATER REMEDIATION <br /> A. Soil Excavation.- 10,400 tons of contaminated soil was excavated in 2005 <br /> B. In-Situ Soil/ Groundwater Remediation- none identified <br /> VII. SENSITIVE RECEPTOR SURVEY- five wells identified within '/z mile of the site <br /> Cafitbraia Environmental Protection Agency <br /> Cli Recycled Paper <br />