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Stephen's Marine -2- MW February 28, 2011 <br /> Claim No. 12858 <br /> B. Monitoring Well Information <br /> Well Designation Date Installed Screen Interval Depth to Water <br /> (feet bgs) (feet bgs) <br /> Oct 2010 <br /> MW-1 Jan 98 5-20 - <br /> MW-2 Jan 98 5-20 _ <br /> MW-3 Jan 98 5-20 _ <br /> MW-4 Jan 98 5-20 - <br /> MW-5 Jan 98 5-20 9.71 <br /> MW-6 Jan 98 5-20 - <br /> MW-7 Jan 06 5-20 8.70 <br /> MW-8 Jan 06 5-20 9.35 <br /> MW-9 Jan 06 5-20 9.04 <br /> MVV-10 Jul 08 5-20 8.50 <br /> MW-11 Jul 08 5-20 g 23 <br /> MW-12 Jul 08 5-20 9.19 <br /> MW-13 Jul 08 28-33_—I__ 9.00 <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 u /L WQOs <br /> Maximum Latest Maximum Latest (ug/L) <br /> Oct 2010 <br /> TPH- NA NA 6,900 5,000 5 <br /> Benzene NA NA 420 21 0.15 <br /> Toluene NA NA 270 23 42 <br /> Eth (benzene NA NA 230 12 29 <br /> Xylenes NA NA 680 23.5 17 <br /> MTBE NA NA 26 <1 5 <br /> TBA NA NA 7.5 <10 12 <br /> 1,2-DCA NA NA 2.7 <0.5 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 /> W00s: 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: unknown volume <br /> B. In-Situ Soil/ Groundwater Remediation: none identified <br /> California Environmental Protection Agency <br /> .n <br /> Cd Recycled Paper <br />