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• Liagot Khan -3- May 4, 2009 <br /> Claim No. 14872 <br /> • DURATION: Aug 04 through May 06 <br /> • VOLUME OF GROUNDWATER EXTRACTED: 979,409 gallons <br /> • MASS OF HYDROCARBONS REMOVED: 0.65 pounds of TPH-G <br /> D. Groundwater Trends: <br /> • Benzene trends are shown below: <br /> BENZENE Results for MW4 <br /> 2000 j 2 <br /> 1800-- <br /> 1600- <br /> 1400- <br /> 800 1600 1400 -_ _� 6 <br /> 1200 --- .ID <br /> Z 1000 ---— 8 <br /> 75 <br /> a) 800 — - <br /> 10 <br /> 600 ----- <br /> 400 _—_, ___.__._.. _ r <br /> 200 12 <br /> — <br /> _. <br /> -- — BENZENE Depth to Water <br /> VII. SENSITIVE RECEPTOR SURVEY: no wells identified within '/2 mile of the site <br /> VIII. COMMENTS AND JUSTIFICATION FOR RECOMMENDED ACTION <br /> A. Site Description: former retail gasoline station <br /> B. Site History: the extent of groundwater contamination is defined <br /> C. Groundwater Monitoring Summary: strong monitoring history <br /> D. Remediation Summary: groundwater extraction <br /> E. Contaminant Exposure Pathway Evaluation: unknown <br /> F. Recommendation: <br /> In May 2008, the Fund made the following recommendation: The Fund <br /> recommends this site be considered for closure providing the potential for soil <br /> vapor migration is assessed and determined safe for prescribed site activities, <br /> public participation and fee title notifications are conducted, and the monitoring <br /> wells are appropriately abandoned. <br /> • The source of the UST release has been identified and removed. <br /> • The site has been adequately characterized. <br /> California Environmental Protection Agency <br /> ID <br /> ;.a Recycled Paper <br />