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i <br /> Chapin Brothers Inc. -2- February 25, 2010 <br /> Claim No. 557 <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 Jul 09 <br /> MW-1 Jan 94 17-30 14.00 <br /> MW-2 Jan 94 15-35 13.26 <br /> MW-3 Jan 94 15-30 13.00 <br /> MW-4 Jan 94 15-35 14.18 <br /> MW-5 Mar 96 6-25 15.02 <br /> MW-6 Apr 97 10-30 13.14 <br /> MW-7 Apr 98 5-25 13.21 <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 /> Jul 09 <br /> TPH-g NA NA 200,000 12,000 5 <br /> TPH-d NA NA NA NA 56 <br /> Benzene NA NA 45,000 5,600 0.15 <br /> Toluene NA NA 40,000 37 42 <br /> Eth (benzene NA NA 34,000 32 29 <br /> Xylenes NA NA 18,000 22 17 <br /> MTBE NA NA 150 <1< 5 <br /> TBA NA NA 140 <10 12 <br /> 1,2-DCA NA NA 240 180 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 /> WQO Water Quality Objectives <br /> FP Free phase product in site wells <br /> V. FREE PRODUCT: MW-1 and MW-4 in Jan 95 <br /> VI. SOIL AND GROUNDWATER REMEDIATION <br /> A. Soil Excavation: unknown volume <br /> California Environmenta/Protection Agency <br /> CJ Recycled Paper <br />