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San Joaquin County DIRECTOR <br /> Donna Her an,RENS <br /> ASSISTANT Department DIRECTOR <br /> r. 600 East Main Street Laurie Cotulla,REHS <br /> X Stockton, California 95202-3029 <br /> PROGRAM COORDINATORS <br /> •:.;> = Mike Huggins, REHS, RDI <br /> -- Margaret Lagorio,REHS <br /> Oq O'g b, Website: wwwsjgov.org/ehd Robert McClellon,REHS <br /> Phone: (209)468-3420 Jeff Carruesco, REHS,RDI <br /> Fax: (209)464-0138 Kasey Foley,REHS <br /> 23 July 2009 <br /> Harold & Dena Knowles <br /> c/o Law Office of Patrick D. Riddle <br /> 1811 Grand Canal Blvd Ste 2 <br /> Stockton, CA 95207-8107 <br /> Subject: 102 S Wilson Way <br /> Stockton, CA <br /> The San Joaquin County Environmental Health Department (EHD) has received and reviewed <br /> Workplan for Soil Vapor Investigation & Vapor Intrusion Evaluation (WP), dated 28 April 2009, <br /> prepared on your behalf by Ground Zero Analysis, Inc. (GZA) for the above referenced site. <br /> In the WP, GZA proposes to advance seven direct-push borings to a depth of 5 feet bsg to <br /> collect soil gas samples in accordance with the guidance document Advisory— Active Soil Gas <br /> Investigations issued by the Department of Toxic Substances Control and the Los Angeles <br /> Regional Water Quality Control Board in 2003. An on-site mobile laboratory will be on site to <br /> provide analytical services for the collected soil gas samples. Leak testing protocols will be <br /> implemented. <br /> The EHD approves the scope of work proposed in the WP as adequate and necessary (H&S <br /> 25296.10[c][31) for your corrective actions on your site. Obtain the proper permits and provide <br /> the EHD a minimum of 48 hours advance notice prior to scheduling the field work. Questions or <br /> comments may be directed to Nuel Henderson at (209) 468-3436. <br /> Sincerely, / <br /> BGG+p�,.1/k/ozc- / B-�-c� <br /> Nuel C. Henderson, Jr., PG Margare agono, REHS <br /> Engineering Geologist Program Coordinator <br /> C: James Barton, CVRWQCB 11020 Sun Center Dr. #200, Rancho Cordova, CA 95670 <br /> Gregory Stahl, GZA, 1714 Main Street, Escalon, CA 95320 <br /> Mohammid Asghar, 601 Wade Ave., Modesto, CA 95351 <br /> Tasnim Akhtar, 1514 E. Market St., Stockton, CA 95205 <br /> Work Plan Approval Letter 0709 <br />