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Yamada Bros Inc. �� -2- June 24, 2008 <br /> Claim No. 17042 <br /> B. Monitoring Well Information <br /> Well Designation Date Installed Screen Interval Most Recent DTW <br /> feet b s Jan 08 <br /> MW-1 Sep00 5-25 5.18 <br /> MW-2 Sep 00 5-25 4.88 <br /> MW-3 Sep 00 5-25 4.81 <br /> MW-4 Jun 04 5-25 5.90 <br /> MW-5 Jun 04 5-25 5.52 <br /> MW-6 Jun 04 5-25 4.48 <br /> MW-7 Jun 04 5-25 5.91 <br /> • MTBE THREAT CLASSIFICATION: N <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 Water (ug/L WQOs <br /> Maximum Latest Z270 <br /> Industrial Maximum Latest (ug/L) <br /> (mg/kg) Jan 08 <br /> TPH- NA NANA 3,000 800 5 <br /> TPH-d NA NANA <50 NA 49 <br /> Benzene NA NA 1.4 9.5 <0.5 0.15 <br /> Toluene NA NA520 9.2 <0.5 42 <br /> Eth (benzene NA NA400 50 <0.5 29 <br /> Xylenes; NA NA 420 216 <0.6 17 <br /> MTBE NA NA 32 70 310 <0.5 5 <br /> TBA NA NA NA NA <10 <1 12 <br /> 1,2-DCA NA NA NA NA <17 NA 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 0.11 110 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 /> B. In-Situ Soil/ Groundwater Remediation: none identified <br /> California Euvirommenta/ProtecSoa Agency <br /> an <br /> P.a Recyc/edPape, <br />