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DIK Enterprises Inc. -5- May 9, 2008 <br /> Claim No. 12992 <br /> D. Groundwater Trends: <br /> Benzene trends are shown below: <br /> Claim 12992 <br /> 10000 <br /> :000000 <br /> 7000 <br /> 6000 , +MW-1 <br /> 5000 KM-2 <br /> N 4000 1 e MW-3 <br /> ami 3000 ` <br /> al 2000 r <br /> 1000 <br /> 0 <br /> 0� Aa Aa 05 A0 d° 00 01 0A <br /> mac SaQQ�a� 5aQ �a� 5aQ far �aQ �a�, 5a� <br /> Time <br /> VII. SENSITIVE RECEPTOR SURVEY: nine wells identified within 'h mile of the site <br /> VIII. COMMENTS AND JUSTIFICATION FOR RECOMMENDED ACTION <br /> A. Site Description: former 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: none to date, soil vapor extraction and air sparging is <br /> pending <br /> E. Contaminant Exposure Pathway Evaluation: unknown <br /> F. Recommendation: The Fund concurs with the San Joaquin County LOP that <br /> soil vapor extraction and air sparging be implemented to achieve Water Quality <br /> Objectives in a timely manner. The Fund further recommends that the <br /> Responsible Party evaluate the necessity of each sampling point and to reduce <br /> the sampling frequency as appropriate to reserve available funds for remediation. <br /> The Fund will review this site next year to track progress. <br /> ,g162 � -- s/1/al <br /> Wirk 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 /> CaliorniaENvironmentalPromctronAgeacy <br /> prj Rerye%dPape� <br />