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Center Street Parts -2- <br /> March 3, 2009 <br /> Claim No. 4423 <br /> B. Monitoring Well Information <br /> Well Designation Date Installed Screen Interval Most Recent DTVII <br /> feet b s Oct 08 <br /> MW-1 Jul 99 15-35 24.89 <br /> MW-2 Jul 99 15-46 25.25 <br /> MW-3 Jul 99 15-35 25.20 <br /> MW-4 Mar 02 20-40 25.41 <br /> M1/V-5 Apr 08 - 25.50 <br /> VW-1 Mar 02 5-25 23.70 <br /> SP-1 Mar 02 48-50 - <br /> MW-2A May 08 45-55 25.35 <br /> MW-3A Apr 08 48-58 25.45 <br /> MW-5A Apr 08 44-49 25.19 <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 /k ESLs Water (ug/L woos <br /> Maximum Latest Shallow 2 Maximum Latest (ug/L) <br /> Soil' Industrial (Oct 08) <br /> Residential Dermal <br /> (mg/kJ) (mg/kg) <br /> TPH NA NA 83 450 190,000 4,800 5 <br /> TPH-d NA NA 83 450 NA NA 56 <br /> Benzene NA NA 0.044 0.27 20,000 380 0.15 <br /> Toluene NA NA 2.9 210 38,000 21 42 <br /> Eth (benzene NA NA 2.3 5.0 6,400 410 29 <br /> Xylenes NA NA 2.3 100 35,000 73 17 <br /> MTBE NA NA 0.023 65 20 X0.5 5 <br /> TBA NA NA 0.075 320,000 180 6.4 12 <br /> 1,2-DCA NA NA 0.0045 0.48 NA NA 0.5 <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 /> I 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 /> WQQ 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 /> Ca ffornia Ea ronmenW Protection Agency <br /> Recycled Aaper <br />