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BJJ Co. -3- April 7, 2008 <br /> Claim No. 380 <br /> C. Groundwater Remediation: <br /> • METHOD: oxygen releasing compound (ORC) in backfill added in Jun 99 <br /> D. Groundwater Trends: <br /> • Benzene trends are shown below: <br /> Claim 380 <br /> 1400 <br /> 1200 .. <br /> 1000 '. <br /> ? 800 <br /> E N 600 _ nntiry s <br /> { <br /> m" <br /> 400 <br /> 200 �.. .��.._._._ <br /> 0 <br /> a��O ���p��� a�A� tom tAh �� �A6 �� �A� <br /> O PQ O QQ O Q� O P� c � O vs C '' <br /> Time <br /> VII. SENSITIVE RECEPTOR SURVEY: no wells identified within Y2 mile.of the site <br /> Vill. COMMENTS AND JUSTIFICATION FOR RECOMMENDED ACTION <br /> Ik 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: ORC added to backfill <br /> E. Contaminant Exposure Pathway Evaluation. unknown <br /> .. <br /> F. Recommendation: The Fund recommends that the San Joaquin County LOP <br /> direct the Responsible Party to assess remedial technologies and the potential of <br /> hydrocarbons to migrate into nearby buildings. The Fund will review this site <br /> next year to track progress. <br /> --- <br /> Kirk Larson, P.G. Date Obert Trommer, C.H.G. Date <br /> Technical Review Unit Chief, Technical Review Unit <br /> 916 341-5663 916 341-5684 <br /> I4 <br /> f California Environmental Protection Agency <br /> Q.nj Recycled Paper , <br />