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B oyett Petroluern -2- October 19, 2007 ' <br /> Claim No. 14172 <br /> 4 <br /> B. Monitoring Well Information <br /> Well Designation Date Installed Screen Interval Most Recent DTW <br /> (feet b ) (Jun 07) <br /> MW-2 Sep 99 15-25 17.13 <br /> MW-3 Sep 99 15-25 17.33 <br /> MW-4r _.Se 2 99 10-25 16.36 <br /> MW-6 Dec 00 10-25 17.34 <br /> MW-7 Dec 00 10-25 17.61 <br /> MW-8 Jan 01 10-25 17.62 <br /> MW-9 Jun 01 40-50 17.31 <br /> MW-10 Oct 03 10-25 1 17.28 <br /> MW-11 Oct 03 29-39 17.51 <br /> EW-1 Oct 03 29-39 17.60 <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 mg/kg) PRGs Water(ug/L) WQ0s <br /> Maximum Latest Residential Industrial Maximum Latest (ug/L) <br /> (mg/kg) (mg/kg) (Jun 07) <br /> TPH-g NA NA NA NA 280 <50 5 <br /> TPN-d NA NA _ NA NA NA NA 49 <br /> Benzene NA NA 0.64 1.4 37 <0.5 0A5 <br /> Toluene NA NA 520 520 19 <0.5 42 <br /> Ethylbenzene NA NA 400 400 53 <0.5 29 <br /> Xylenes NA NA 270 426 90 <1 17 <br /> MTBE NA NA 32 70 27,000 <0.5 5 <br /> TBA NA NA NA NA NA NA 12 <br /> 1,2-DCA NA NA NA NA ND <0.5 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 11_0_ NA NA 0.8 <br /> PRGs LISEPA 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 /> N%R-- <br /> C,?Afiornio 1,,"n;,irt?tyirienti]Protectioit Agency <br /> Z4, R.'y"'d Piper 0 <br />