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Gillies Trucking • -3- • May 5, 2011 <br /> Claire No. 1129 <br /> IV. MAXIMUM DOCUMENTED CONTAMINANT CONCENTRATIONS <br /> Contaminant Soil m /k Water u /L WQOs <br /> Maximum Latest Maximum Latest (ug/L) <br /> Dec 0 <br /> TPH- NA NA 1,800 <50 5 <br /> TPH-d NA NA 190,000 410 56 <br /> Benzene NA NA 16 <0.5 0.15 <br /> Toluene NA NA 15 <0.5 42 <br /> Eth (benzene NA NA 10 <0.5 29 <br /> Xylenes NA NA 11 <0.5 17 <br /> MTBE NA NA 100 <0.5 5 <br /> TBA NA NA 5.5 <5 12/1,200- <br /> 1,2-DCA NA NA ND <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 /> Woos: Water Quality Objectives <br /> a California Department of Public Health Notification Level/Response Level <br /> V. FREE PRODUCT: none identified <br /> VI. SOIL AND GROUNDWATER REMEDIATION <br /> A. Soil Excavation: several thousand cubic yards of contaminated soil were <br /> excavated in Jul 90. <br /> B. In-Situ Soil/ Groundwater Remediation: <br /> • METHOD: soil vapor extraction pilot test <br /> • DURATION: September 2010 <br /> • RATE OF TPH-G REMOVAL: 27 pounds/day <br /> C. Groundwater Trends: TPH-D trends are shown below, source area <br /> DIESEL RANGE ORGANICS Results for GT-16A <br /> 1800 <br /> 1600 <br /> 1400 <br /> 1200 <br /> 1000 <br /> H 900 <br /> 600 <br /> 400 <br /> 200 <br /> DIESEL RANGE ORGANICS <br /> California Environmental Protection Agency <br /> Qct Rey,/,d Paper <br />