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Gene Gabbard Inc. 4k -3- May 2, 2008 <br /> Claim No. 13324 <br /> C. Groundwater Trends: <br /> Benzene trends are shown below: <br /> Claim 13324 <br /> 35 <br /> 30 <br /> 25 <br /> m <br /> 20 <br /> a t MJV-3 <br /> H <br /> 15 <br /> M 10 <br /> 5 <br /> 0 <br /> o� o� o° o° o° o° o`' 05 0` 05 0 00 <br /> Time <br /> VII. SENSITIVE RECEPTOR SURVEY: no wells identified within '/z mile of the site <br /> Vlll. 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: moderate monitoring history <br /> D. Remediation Summary: free product removal <br /> E. Contaminant Exposure Pathway Evaluation: unknown <br /> F. Recommendation: The Fund concurs with the San Joaquin County LOP that <br /> the Responsible Party must conduct regular quarterly monitoring for a full <br /> hydrologic cycle including all appropriate analytes and to assess the potential for <br /> soil vapor migration into nearby structures. The Fund will review this site next <br /> year to track progress. <br /> Lek( 6 <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 /> • :d Recyc/ed Paper <br />