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Three Palms Grocery -3- - May 9, 2008 <br /> Claim No. 13455 <br /> D. Groundwater Trends: <br /> • 1,2 DCA trends are shown below: <br /> Claim 13455 <br /> 45 <br /> 40 <br /> 35 <br /> 30 -- - __ - r--7�:] <br /> Ma 25 -20 <br /> cs! 15 - <br /> 10 <br /> 5i - - - <br /> �O`5 \A`5 <br /> Time <br /> VII. SENSITIVE RECEPTOR SURVEY: no 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: The Fund concurs with the San Joaquin County LOP that <br /> the Responsible Party submit a Corrective Action Plan. The Fund will review this <br /> site next year to track progress. <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�iri iroamentalProlectionflgency <br /> �.a Recvc%dPQper <br />