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Bank of Stockton -2- March 3, 2011 <br /> Claim No. 1878 <br /> B. Monitoring Well Information <br /> Well Designation Date Installed Screen Interval Depth to Water <br /> (feet bgs) (feet bgs) <br /> (Sep 2010 <br /> MW-1 Nov 92 35-54 - <br /> MW-4 Nov 92 33-54 - <br /> MW-6 Mar 98 20-45 26.48 <br /> MW-7 Mar 98 20-45 27.12 <br /> MW-813 Mar 98 21-46 27.05 <br /> MW-9 Mar 98 20-45 26.77 <br /> MW-10 Mar 98 20-45 27.66 <br /> MW-11 Mar 98 20-45 27.26 <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 m /k Water (ug/L WQOs <br /> Maximum Latest Maximum Latest (ug/L) <br /> (Sep 2010 <br /> TPH-g NA NA 127,000 12,000 5 <br /> Benzene NA NA 22,500 1,500 0.15 <br /> Toluene NA NA 11,600 1,500 42 <br /> Eth (benzene NA NA 22,500 220 29 <br /> Xylenes NA NA NA 1,500 17 <br /> MTBE NA NA NA NA 5 <br /> TBA NA NA NA NA 12 <br /> 1,2-DCA NA NA NA NA 0.5 <br /> NA: Not Analyzed, Not Applicable or Data Not Available <br /> mg/kg: milligrams per kilogram, parts per million <br /> ug/L: micrograms per liter, parts per billion <br /> WQOs: Water Quality Objectives <br /> FP Free phase product in site wells <br /> V. FREE PRODUCT: none identified <br /> VI. SOIL AND GROUNDWATER REMEDIATION <br /> A. Soil Excavation: 2500 yards of contaminated soil were excavated in June 1991. <br /> California Environmental Protection Agency <br /> CO Recye%d Paper <br />