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, r 1 <br /> Toste Farms -3- May 5, 2009 <br /> Claim No. 14558 <br /> A. Soil Excavation: unknown volume w <br /> B. In-Situ Soil Remediation: none identified <br /> C. Groundwater Remediation: <br /> • METHOD: ozone sparging <br /> • DURATION: Jun 04 through present <br /> D. Groundwater Trends: <br /> • MTBE trends are shown below <br /> METHYL-TERT-BUTYL ETHER (MTBE) Results for MW7 40000 ---W�.-- -- - -- ----- <br /> 5 <br /> 35000- <br /> 30000- <br /> -7 <br /> 5000 300007 <br /> 25000 <br /> c <br /> N 20000 — -- 9 <br /> a <br /> 15000 — _ -- -- o <br /> . 11 <br /> 10000- <br /> 5000 } 13 <br /> a <br /> xc► METHYL-TERT-BUTYL ETHER(MTBE) 04 Depth to Water <br /> 't r' <br /> VII. SENSITIVE RECEPTOR SURVEY: no wells identified'within Y2 mile of the site <br /> VIII. COMMENTS AND JUSTIFICATION FOR RECOMMENDED ACTION } <br /> A. Site Description: 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- ozone sparging <br /> E. Contaminant Exposure Pathway Evaluation: unknown <br /> F. Recommendation: <br /> In May 2008, the Fund made the following recommendation: 'The Fund <br /> recommends that the San Joaquin County LOP direct the Responsible Party <br /> assess the effectiveness of the current groundwater treatment system and <br /> maximize the system as necessary to achieve Water Quality Objectives'in a <br /> timely manner. The Fund will review this site next year t5o track progress. <br /> UPDATED, May 2009: Based on the following criteria, the Fund. recommends <br /> this site be considered for closure providing a health hazard risk assessment is <br /> California Environmental Protection Agency <br /> �.a Recycled Paper <br />