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Ranch Market -2- May 13, 2010 <br /> Claim No. 15211 <br /> B. Monitoring Well Information <br /> Well Designation Date Installed Screen Interval Most Recent DTW <br /> feet b s Se 08 <br /> MW-1 Dec 98 ? 31.18 <br /> MW-2 Dec 98 ? - <br /> MW-3 Dec 98 ? 31.60 <br /> MW-4 Dec 98 ? 32.22 <br /> MW-5 Aug00 ? 31.51 <br /> MW-5d Aug00 ? 32.50 <br /> MW-6 Aug00 ? 30.17 <br /> MW-7 Aug00 ? 32.13 <br /> MW-8 Aug00 ? 31.65 <br /> MW-9 Aug00 ? 34.96 <br /> AS-1 Jul 02 ? 21.12 <br /> • MTBE THREAT CLASSIFICATION: A <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 /> Se 08 <br /> TPH-g NA NA 180,000 86,000 5 <br /> TPH-d NA NA NA NA 56 <br /> Benzene NA NA 20,000 270 0.15 <br /> Toluene NA NA 24,000 290 42 <br /> Eth (benzene NA NA 4,400 630 29 <br /> Xylenes NA NA 25,000 6,000 17 <br /> MTBE NA NA 380 7.8 5 <br /> TBA NA NA <2000 5.2 12 <br /> 1,2-DCA NA NA 70 0.7 0.4 <br /> Lead NA NA NA NA 15 <br /> PCE NA 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 /> V. FREE PRODUCT: monitoring well MW-3 has contained up to 0.5 feet of free <br /> product. <br /> VI. SOIL AND GROUNDWATER REMEDIATION <br /> A. Soil Excavation: unknown volume <br /> California En vironmentai Protection Agency <br />