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Jerry and Marleta Castro -4- May 19, 2008 <br /> Claim No. 12325 <br /> C. Groundwater Trends: <br /> • Benzene trends are shown below <br /> Claim 12325 <br /> 7000 -- <br /> 6000 <br /> rn 5000 tMW-1 <br /> � 4000 tMW-2 <br /> N 3000 MW-3 <br /> 2000 MWS <br /> 00 1000 - <br /> 0 - <br /> lz� 03 <br /> Q�� POA dee Q°ej Qe� Poe' ��0 p�°j �e0 Qom°' <br /> Time <br /> VII. SENSITIVE RECEPTOR SURVEY: seven wells identified within 'Y2 mile of the site <br /> VIII. COMMENTS AND JUSTIFICATION FOR RECOMMENDED ACTION <br /> A. Site Description: car wash <br /> B. Site History: the extent of groundwater contamination is largely defined <br /> C. Groundwater Monitoring Summary: strong monitoring history <br /> D. Remediation Summary: none conducted <br /> E. Contaminant Exposure Pathway Evaluation: unknown <br /> F. Recommendation: The San Joaquin County LOP has directed the Responsible <br /> Party to conduct active remediation to achieve Water Quality Objectives in a <br /> timely manner. The Fund concurs with this action and will review this site next <br /> year to track progress. <br /> Kirf,, 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 Enwronmenta/Protection Agency <br /> Qd RecydedPape, <br />