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W. Graffigna Jr. and Wham Graffigna -2- -.0w May 2, 2011 <br /> Claim No. 13578 <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 � Nov 99 45-65 60.30 <br /> MW-2 Nov 99 45-65 60.62 <br /> MW-3 Nov 99 45-65 60.43 <br /> MW-4 Nov 99 45-65 61.21 <br /> MW-5 Apr 04 45-65 - <br /> MW-6 Jul 03 45-65 60.33 <br /> MW-7 Jul 03 80-90 60.50 <br /> MW-8 Dec 05 45-65 60.80 <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 'he <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 /> Oct 2010 <br /> Tf'H-g� NA NA 180,000 <50 5 <br /> Benzene NA NA 1,000 <0.5 0.15 <br /> Toluene NA NA 100 <0.5 42 <br /> Eth (benzene NA NA 58 <0.5 29 <br /> Xylenes NA NA 1.700 <0.5 17 <br /> MTBE NA NA 180,000 <1 5 <br /> TBA NA NA 500 <10 1,200a <br /> 1,2-DCA NA NA <0.5 <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 /> WQOs Water Quality Objectives <br /> According to GeoTracker, wells <br /> California Department of Public Health Response Level <br /> V. FREE PRODUCT: none identified <br /> VI. SOIL AND GROUNDWATER REMEDIATION <br /> A. Soil Excavation: unknown volume <br /> (alilbrz a.Ehi;Zronmcntal Protection Agency <br /> Cl�Recpcled Paper <br />