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i Fremont Plaza Storage -3- June 23 , 2011 <br /> . Claim No . 1696 <br /> I <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 : Jul 94 through 1996 <br /> • MASS REMOVED : 15 , 000 pounds of TPH-G <br /> C . Groundwater Remediation : <br /> • METHOD : In-situ chemical oxidation pilot study proposed <br /> D. Groundwater Trends : Benzene trends are shown below, source and down <br /> gradient , respectively <br /> BENZENE Results for MW-9 <br /> 70000 - <br /> 60000 - <br /> 05 - <br /> 0000 - 1 r <br /> 60000 – <br /> so0oo - — _ --- <br /> 40000 - -- <br /> v'. 30000 - <br /> 20000 ' . <br /> yz <br /> ; 0000 <br /> I �.�. BENZENE <br /> BENZENE Results for MW-8 <br /> 7000 - -- <br /> BOO( <br /> 000 sow <br /> ^ 5000 - Or <br /> 4000 <br /> r <br /> y <br /> 3000 - <br /> . ..______. <br /> - 2000 <br /> rr <br /> a o' Ook <br /> '4a•. BENZENE - <br /> California Environmental Protection Agency <br /> p„d Recycled Paper <br />