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Den's Auto Repair -2- "✓ March 3, 2011 <br /> Claim No. 10841 <br /> B. Monitoring Well Information <br /> Well Designation Date Installed Screen Interval Depth to Water <br /> (feet bgs) (feet bgs) <br /> (Aug2010 <br /> MW-1a Sep 97 60-65 22.95 <br /> MW-1b Sep 97 25-45 22.93 <br /> MW-2a Sep 97 60-65 23.39 <br /> MW-2b Sep 97 25-45 23.13 <br /> MW-3a Sep 97 60-65 24.20 <br /> MW-3b Sep 97 20-40 24.13 <br /> MW-4 Feb 06 110-120 23.60 <br /> MW-5 Feb 06 60-65 22.98 <br /> MW-6 Feb 06 60-65 23.75 <br /> MW-7 Feb 06 110-120 23.55 <br /> MW-8 Oct 2010 108-118 23.95 <br /> MW-9 Oct 2010 60-65 24.25 <br /> MW-10 Oct 2010 60-65 2 3.77 <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 /> Feb 2011 <br /> TPH-g 1,500 NA 33,000 36,000 5 <br /> Benzene 1.6 NA 8,400 700 0.15 <br /> Toluene 3.5 NA 200 19 42 <br /> Eth (benzene 27 NA 1,000 42 29 <br /> Xylenes 590 NA 1,500 113 17 <br /> MTBE <0.15 NA 2,160 <1 5 <br /> TBA <0.5 NA 1 650 1 <10 12 <br /> 1,2-DCA <0.1 NA 1 42 1 17 0.5 <br /> NA: Not Analyzed, Not Applicable or Data Not Available A? fl' <br /> mg/kg: milligrams per kilogram, parts per million <br /> ug/L: micrograms per liter, parts per billion <br /> WQOs: Water Quality Objectives <br /> V. FREE PRODUCT: none identified <br /> VI. SOIL AND GROUNDWATER REMEDIATION <br /> A. Soil Excavation: unknown volume <br /> California Environmental Protection Agency <br /> 0 Recycled Paper <br />