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Regional Office + 4585 Pacheco Boulevard INTERN TLO N Martinez,California 94553-2233 ® 510-372-9100 CORPORATION Fax: 510-372-5220 February 29, 1996 IT Project No. 190916.011 ' Ms. Mary Maeys San Joaquin County Environmental Health Department 304 East Weber Street Stockton, CA 95201 Work Plan for Monitoring Well Abandonment Activities Pacific Bell Facility 345 North San Joaquin Street Stockton, California Dear Ms. Maeys: IT Corporation (IT) was retained by Pacific Bell to generate this letter work plan for the abandonment of three two-inch diameter groundwater monitoring wells and two two-inch j diameter vapor monitoring wells, at the above referenced Pacific Bell Facility located in Stockton, California (Figure 1). These wells are no longer in use and closure requirements have been met (as per our phone conversation on February 8, 1996). The following letter work plan discusses planned well abandonment procedures and disposition of the waste materials generated during completion of abandonment activities. Field Procedures Prior to commencement of work, a Tailgate Safety Meeting will be held to ensure that the proper site safety precautions are.observed. This safety meeting will be conducted in accordance with the site-specific health and safety plan. Abandonment activities will be performed by representatives of Gregg Drilling and Testing, Incorporated (a C-57 licensed driller), under IT supervision. A well abandonment permit will be obtained from your office as well as an encroachment permit from the City of Stockton, prior to commencement of field activities. The well box and cover at each of the five wells will be hammered out using heavy hand ' tools. Each well will then be over-bored to its total depth, utilizing an eight-inch outer diameter hollow-stem auger attached to a B-61 drill rig. Groundwater monitoring wells MW- w 1T Corporation is a wholly owned subsidiary of International Technology Corporchon 111