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Best California Gas -4- May 2, 2011 <br /> Claim No. 13729 <br /> A. Site Description: active 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: soil vapor extraction <br /> E. Contaminant Exposure Pathway Evaluation: Responsible Party's consultant <br /> concluded that, "existing contamination do not pose a vapor intrusion risk" <br /> F. Recommendation: <br /> In May 2008, the Fund recommends that the San Joaquin County LOP direct the <br /> Responsible Party to assess remedial groundwater technologies and implement <br /> active remediation to achieve Water Quality Objectives in a timely manner. The <br /> Fund will review this site next year to track progress. <br /> UPDATED, May 2009, the Fund continues to recommend that the San Joaquin <br /> County LOP direct the Responsible Party to assess remedial groundwater <br /> technologies and implement active remediation to achieve Water Quality <br /> Objectives in a timely manner. The Fund will review this site next year to track <br /> progress. <br /> UPDATED, May 2010, by letter on 4 May 2010, the San Joaquin County LOP <br /> approved a groundwater extraction pilot study. The Fund concurs and will review <br /> this site next year to track progress. <br /> UPDATED, May 2011, this retail gasoline station remains active and is <br /> completely paved. The Responsible Party concluded that residual hydrocarbons <br /> do not threaten public health or the environment and estimates water quality <br /> objectives will be achieved in less than ten years. Remaining groundwater <br /> contamination is confined to the source area and the nearest municipal water <br /> well is greater than 1,000 feet from the site. The Fund recommends that the San <br /> Joaquin County LOP review this site for closure. <br /> YXCI� <br /> Kirk Larson, P.G. Date Robert Trommer, C.H.G. Dat <br /> Engineering Geologist Senior Engineering Geologist <br /> Technical Review Unit Chief, Technical Review Unit <br /> (916) 341-5663 (916) 341-5684 <br /> California Environmental Protection Agency <br /> Z4' Recycled Paper <br />