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Center Street Parts -3- March 24, 2008 <br /> Claim No. 4423' <br /> C. Groundwater Remediation: <br /> • METHOD: air spa rging <br /> • DURATION: Nov )03 through Nov 05 <br /> D. Groundwater Trends: <br /> • Benzene trends are shown below: <br /> Claim 4423 <br /> 350 ; <br /> 300 <br /> 250 <br /> a <br /> 200 <br /> d 150 -t-_MW-2] <br /> N <br /> 100 <br /> CD <br /> m 50 <br /> a <br /> Off` Off` off` : Oh Oh O� OHO OHO <br /> qp ,���aA Q ,ate��� CpQ <br /> Time <br /> VII. SENSITIVE RECEPTOR SURVEY: no wells identified within Y2 mile of the site <br /> VIII. COMMENTS AND JUSTIFICATION FOR RECOMMENDED ACTION <br /> A. Site Description: former bakery, parts store <br /> B. Site History: the extent of groundwater contamination is defined <br /> C. Groundwater Monitoring Summary: strong monitoring history <br /> D. Remediation Summary: soil vapor extraction and air sparging <br />! E. Contaminant Exposure Pathway Evaluation: unknown <br /> F. Recommendation: The San Joaquin County LOP approved a work plan for <br /> additional assessment in Feb 2008. The Fund concurs with the additional . <br /> investigation and will:review this 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 /> II (916) 341-5663 . (916) 341-5684 <br /> f <br />} California Environmental Protection Agency. <br /> �a Recycled Psper <br />