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Three Palms Grocery -3- April 30, 2009 <br /> Claim No. 13455 <br /> D. Groundwater Trends: <br /> • 1 ,2 DCA trends are shown below: <br /> 1,2-DICHLOROETHANE Results for MW1 <br /> 45 -77 <br /> 40I1 <br /> 35 —t - 81 <br /> 30 {I 83 d <br /> -- 85 <br /> � 25 -� _. c <br /> 5 20 - 87 <br /> m <br /> 15 89 Ck <br /> 10 ----r--- - - _.-- -991 <br /> S --- --' -- — 93 <br /> 0 --- I 195 <br /> - 1,2-DICHLOROETHANE Depth to Water <br /> VII. SENSITIVE RECEPTOR SURVEY: three wells identified within 1/2 mile of the site <br /> VIII. COMMENTS AND JUSTIFICATION FOR RECOMMENDED ACTION <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: San Joaquin County LOP has directed the <br /> Responsible Party to submit a Corrective Action Plan by 27 May 2008. The <br /> Responsible Party conducted a vapor extraction pilot test in Sep 07 yielding <br /> approximately 174 pounds/day of TPH-G. <br /> E. Contaminant Exposure Pathway Evaluation: unknown <br /> F. Recommendation: <br /> In May 2008, the Fund made the following recommendation: The Fund concurs <br /> with the San Joaquin County LOP that the Responsible Party submit a Corrective <br /> Action Plan. The Fund will review this site next year to track progress. <br /> UPDATED, May 2009: By letter on 4 December 2008, the San Joaquin County <br /> approved soil vapor extraction. The Fund concurs and will review this site next <br /> year to track progress. J <br /> Kirk Larson, P.G. Date 'Robert Trommer, C.H.G. Date <br /> Technical Review Unit Chief, Technical Review Unit <br /> (916) 341-5663 (916) 341-5684 <br /> California Environmental Protection Agency <br /> .ti <br /> Pia Recycled Paper <br />