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Walter Shockley -2- August 10, 2010 <br /> Claim No. 9384 <br /> • SOIL TYPES: interbedded and intermixed sand, silt, and clay <br /> B. Monitoring Well Information <br /> Well Designation Date Installed Screen Interval Most Recent DTW <br /> feet b s Dec 09 <br /> MW-1 Jun 96 14-34 27.12* <br /> MW-2 Jun 96 12-32 27,62 <br /> MW-3 Jun 96 13-33 27.46 <br /> MW-4 Jun 96 8-28 27.60 <br /> MW-5 Oct 02 10-30 - <br /> MW-6 Jun 08 45-50 27.74 <br /> MW-7 Jun 08 45-50 27.35 <br /> MW-8 Jun 08 15-30 27.18 <br /> MW-9 Jun 08 15-30 27.22 <br /> MW-10 Jun 08 15-30 25.03 <br /> MW-11 Jun 08 45-50 30.14 <br /> Free phase product in site wells <br /> • MTBE THREAT CLASSIFICATION: X <br /> • LAND USE DESIGNATION: 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 mIk Water u IL WQOs <br /> Maximum Latest Maximum Latest (ug/L) <br /> (June 2010)" <br /> TPH- NA NA 270,000' NA 5 <br /> TPH-d NA NA 1,500,000 88,000 56 <br /> Benzene NA NA 10 NA 0.15 <br /> Toluene NA NA 2.7 NA 42 <br /> Eth lbenzene NA NA 13 NA 29 <br /> Xylenes NA NA 54 NA 17 <br /> MTBE NA NA 12 NA 5 <br /> TBA NA NA 27 NA 12 <br /> 1,2-DCA NA NA ND NA 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 /> Free phase product in site wells <br /> V. FREE PRODUCT: free product, TPH-D, in MWA and MW-4 <br /> VI. SOIL AND GROUNDWATER REMEDIATION <br /> A. Soil Excavation: unknown volume <br /> CaGlornia Environmental Protection Agency <br />