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Three Palms Grocery -2- _ May 2, 2011 <br /> Claim No. 13455 <br /> B. Monitoring Well Information <br /> Well Designation Date Installed Screen Interval Depth to Water <br /> (feet bgs) (feet bgs) <br /> (Apr 2010) <br /> MW-1 Jun 99 71-91 Dry <br /> MW-2 Jun 99 71-91 Dry <br /> MW-3 Jun 99 72-92 Dry <br /> MW-4 Oct 05 130-140 90.81 <br /> MW-5 Oct 05 130-140 90.40 <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 /> Mar 2011 <br /> TPH-g NA NA 310 <50 5 <br /> Benzene NA NA 1.2 <0.5 0.15 <br /> Toluene NA NA 0.8 <0.5 42 <br /> Eth (benzene NA NA 1.4 <0.5 29 <br /> Xylenes NA NA 7.8 <0.5 17 <br /> MTBE NA NA <5 <0.5 5 <br /> TBA NA NA <20 <5 1,200 <br /> 1,2-DCA NA NA 40 <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 /> a 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 /> B. In-Situ Soil Remediation: <br /> • METHOD: soil vapor extraction <br /> • DURATION: May 2010 through present <br /> • TPH-G INFUENT CONCENTRATION: 136 ppmv (Oct 2010) <br /> C. Groundwater Remediation: none identified <br /> California Environmental Protection Agency <br /> 0a Recycled Paper <br />