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__ _ _ _ -_ _ <br /> N <br /> Stallworth Auto Detail -2- April 23 , 2008 <br /> Claim No . 12235 <br /> I <br /> B. Monitoring Well Information <br /> Well Designation Date Installed Screen Interval Most Recent DTW <br /> feet b s Dec 07 <br /> MW-1 a Jan 06 19-39 27 . 90 <br /> MW-1 b Jan 06 29-49 28. 26 <br /> MW- 1 c Jan 06 12- 134 28 .48 <br /> MW- 1d Jan 06 139-149 28 . 91 <br /> MW-2 Jun 00 29-49 28 . 11 <br /> MW-3 Jun 00 2040 29 .41 <br /> MW-4 Jun 00 19-39 28 . 16 <br /> MW-5 Jun 02 18-38 28 . 55 <br /> MW-6 Jun 02 19-39 29 . 11 <br /> MW-7 Jun 07 60-70 29 .65 <br /> MW-8 Jun 07 59-69 29 . 05 <br /> • MTBE THREAT CLASSIFICATION : C . <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 PRGs I Water (ug/L WQOs <br /> Maximum Latest tNA <br /> Industrial Maximum Latest (ug/L) <br /> (mg/kg) Dec 07 <br /> TPH- NA NANA 470, 000 190, 000 5 <br /> TPH-d - NA NANA 92000 52, 000 49 <br /> Benzene NA NA 1 .4 50,000 21 , 000 0. 15 <br /> Toluene NA NA520 160, 000 98,000 42 <br /> Eth (benzene NA NA 400 28,000 11 ,000 29 <br /> Xylenes NA NA 270 420 1823000 34 , 000 17 <br /> MTBE NA NA 32 _ 70 500 < 1 5 <br /> TBA NA NA NA NA ND <10 12 <br /> 112-DCA NA NA NA NA 390 220 0. 5 <br /> Lead NA NA 400 500 NA NA 15 <br /> PCE NA 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 : unknown volume <br /> California En vironmonta/ Protection Agency <br /> Zo'* Recycled Paper <br />