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,� <br /> Mohammed Mater -2- May 9 , 2008 <br /> 61 Claim No . 14840 <br /> it <br /> II <br /> B. Monitoring Well Information <br /> Well Designation Date Installed Screen Interval Most Recent DTW <br /> (feet bgs) Nov 07 <br /> MW- 1 Mar 04 35-55 27. 12 <br /> MW-2 Mar 04 25-45 26. 74 <br /> MW-3 Mar 04 35-55 a26,90 <br />' MW-4 Mar 04 30-50 26 .87 <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) WQOs <br /> Maximum Latest Residential Industrial Maximum Latest (ug/L) <br /> (mg/kg) (mg/kg) Nov 07 <br /> TPH-g NA NA NA NA 82,000 53,0011 5 <br /> TPH-d NA NA NA NA NA NA 49 <br /> Benzene NA NA 0.64 1 .4 18,000 5,300 0.15 . <br /> Toluene NA NA _ 520 520 4,500 11800 42 <br /> Ethylbenzene NAWNA <br /> 400 400 13100 850 29 <br /> Xylenes NA 270 420 5,200 21700. 17 <br /> MTBE NA 32 70 20,000 6,500 5 <br /> TBA NA NA NA <10 <10 12 <br /> 1 ,2-DCA NA NA NA 190 190 0.5 <br /> Lead NA 400 800 NA NA 15 <br /> PCE 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 : approximately 175 cubic yards of contaminated soil were <br /> excavated in Apr 00 <br /> B. In-Situ Soil Remediation : none identified <br /> METHOD: soil vapor extraction pilot test (Aug 05), considered a viable <br /> remedial technology <br /> C. Groundwater Remediation : <br /> METHOD : groundwater extraction pilot test (Aug 05), considered ineffective <br /> CaliforniaEn vironmenfalP1-OMC1don d9W1CY <br /> �aXecycledPa,Pr <br />