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l <br /> Bank of Stockton -3- April 21, 200$ <br /> ,Chaim No.. 1878 <br /> C. Groundwater Remediation: <br /> • METHOD: air spargi 'g <br /> • DURATION: FE'c.05 through present j <br /> D. Groundwater Trends: <br /> • Benzene trends are shown below <br /> Claim 1878 <br /> 25000 <br /> a, <br /> 20000 <br /> m <br /> 15000 i.�_MW-7 <br /> N 10000 - —®—MW-86 <br /> c <br /> 5000 . <br /> 0. <br /> MM M d. V, 'IT LO L O O O <br /> O O O O. O O O O O O. O. O O. <br /> (6 75 <br /> O (0 O M 3. O (6 O (6 .• . <br /> -' Z -' Z 2 .-' Z -' Z <br /> Time <br /> VII. SENSITIVE RECEPTOR SURVEY: one well identified within '/z mile of the site <br /> VIII. COMMENTS AND JUSTIFICATION FOR RECOMMENDED ACTION <br /> A. Site [description: fueling facility for wood products manufacturer <br /> B. Site History: the extent of groundwater contamination is-defined <br /> C. Groundwater Monitoring Summary: strong monitoring history <br /> D. Remediation Summa soil vapor extraction and airs ar in <br /> Summary: p p 9 g. . . : . . . . . . . .. . . i <br /> E. Contaminant Exposure Pathway Evaluation: unknown <br /> F. Recommendation The Fund concurs with the continued operation of the soil <br /> vapor extraction and air sparging system. The systems should be reevaluated j <br /> periodically and maximized as necessary to achieve Water Quality Objectives in. . <br /> a timely manner. The Fund .will review this site next year to track progress. <br /> k4 <br /> KK 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 /> • �C1 Recycled Paper <br />