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T&T Trucking -2- April 28, 2011 <br /> Claim No. 10934 <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 Aug95 70-90 83.48 <br /> MW-2 Aug95 65-80 Dry <br /> MW-3 Aug95 65-80 D <br /> MW-4 Aug95 60-80 D <br /> ASW-1 ? 98-100 - <br /> ASW-2 ? 98-100 - <br /> ASW-3 ? 98-100 - <br /> ASW-4 ? 98-100 - <br /> ASW-5 ? 98-100 - <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 lk Water (ug/L woos <br /> Maximum Latest Maximum Latest (ug/L) <br /> Mar 2011 <br /> TPH-g NA NA 150,000 <50 5 <br /> Benzene NA NA 90 <0.5 0.15 <br /> Toluene NA NA 4.9 <0.5 42 <br /> Eth (benzene NA NA 3.2 <0.5 29 <br /> Xylenes NA NA 1.3 <0.6 17 <br /> MTBE I NA NA 150,000 <1 5 <br /> TBA I NA NA 2,3001 <10 12 <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 /> V. FREE PRODUCT: none identified <br /> VI. SOIL AND GROUNDWATER REMEDIATION <br /> A. Soil Excavation: unknown volume <br /> B. In-Situ Soil/ Groundwater Remediation: <br /> METHOD: soil vapor extraction and air sparging <br /> • DURATION: Apr 2008 through Dec 2010 <br /> • MASS OF TPH-G REMOVED: 6,437 pounds (Dec 2010) <br /> • TPH-G INFLUENT CONCENTRATION: 29 ppmv (Dec 2010) <br /> California Environmental Protection Agency <br /> .aZA'Rerycled Paper <br />