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Three Palms Grocery -2- May 10, 2010 <br /> Claim No. 13455 <br /> B. Monitoring Well Information <br /> Well Designation Date Installed Screen Interval Most Recent DTW <br /> feet b s Jan 2010 <br /> MW-1 Jun 99 71-91 Dry <br /> MW-2 Jun 99 71-91 Dry <br /> MW-3 Jun 99 72-92 Dry <br /> MW-4 Oct 05 1 130-140 94.76 <br /> MW-5 Oct 05 1 130-140 94.41 <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 Water (ug/L WQOs <br /> Maximum Latest Maximum Latest (ug/L) <br /> Jan 10 <br /> TPH-g NA NA 210 <50 5 <br /> TPH-d NA NA NA NA 56 <br /> Benzene NA NA 1.2 <0.5 0.15 <br /> Toluene NA NA 0.8 <0.5 42 <br /> Eth (benzene NA NA 1.4 <0.5 29 <br /> Xylenes NA NA 7.8 <0.5 17 <br /> MTBE NA NA <5 <0.5 5 <br /> TBA NA NA <20 <5 12 <br /> 1,2-DCA NA NA 40 <0.5 0.4 <br /> Lead NA NA NA NA 15 <br /> PCE NA I NA NA NA 0.06 <br /> TCE NA NA NA NA 0.8 <br /> NA Not Analyzed, Not Applicable, or Data Not Available <br /> WOO Water Quality Objectives <br /> FP Free phase product in site wells <br /> MW-1 not sampled <br /> V. FREE PRODUCT: none identified <br /> VI. SOIL AND GROUNDWATER REMEDIATION <br /> A. Soil Excavation: unknown volume <br /> B. In-Situ Soil Remediation: <br /> • METHOD: soil vapor extraction <br /> • DURATION: pending, Mar 2010? <br /> C. Groundwater Remediation: none identified <br /> California Environmental Protection Agency <br /> in <br />