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Chevron Products Company • 4 <br /> Chevron Service Station 20-0764 4747*West Lane Stockton Califomia Aoril 5 2002 <br /> The groundwater monitoring wells will be destroyed in accordance with the California Well <br /> • Standards,Bulletin 74-90. The wells will be pressure grouted from the bottom up using tremie <br /> pipe, the top five feet of the wells will then be drilled out, the well boxes removed, and the wells <br /> completed to the surface with concrete. Appropriate permits will be secured from SJPHS prior to <br /> the work being performed and appropriate agency notification will be made before the work is to <br /> be performed. <br /> If there are any questions regarding the contents of this site assessment,please call Brian Silva of <br /> SECOR at (916) 861-0400 extension 240 or Bob Cochran of Chevron at(925) 842-9655. <br /> Sincerely, <br /> SECOR International Incorporated <br /> Brian Silva William E. Brasher, P.E. <br /> Project Manager Senior Engineer <br /> Attachments: Table 1 —Groundwater Analytical Data(Monitoring Wells) <br /> Table 2—Slug Test Results <br /> Figure 1 —Site Location Map <br /> Figure 2—Site Map <br /> Figure 3 —Groundwater Elevation Contour Map, November 13 and 14, 2001 <br /> Figure 4—Groundwater Elevation Contour Map, January 10, 2002 <br /> Attachment A—Field and Laboratory Procedures <br /> Attachment B—Groundwater Monitoring Well Development and Sampling Field <br /> Data Sheets <br /> Attachment C—Boring Logs and Well Construction Details (Monitoring Wells) <br /> Attachment D—Laboratory Analytical Reports and Chain-of-Custody <br /> Documentation(Monitoring Wells) <br /> Attachment E—Data Plots and Analyses for Slug Tests <br /> Attachment F—Cone Penetration Test Data Logs <br /> Attachment G—Laboratory Analytical Reports and Chain-of- <br /> Custody Documentation(CPT Borings) <br /> cc: Bob Cochran, Chevron Products Company, San Ramon, CA <br /> Marty Hartzell, Regional Water Quality Control Board, Sacramento, CA <br /> i <br />