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PACIFIC <br /> ENVIRONMENTAL <br /> GROUP INC. I_ <br /> [[ <br /> I,t 4 .V <br /> PM 1: 20 <br /> November 2, 1995 <br /> Project 305-135.1D <br /> Mr. Harlan Knoll <br /> San Joaquin County Public Health Services <br /> Environmental Health Division <br /> P.O. Box 2009 <br /> 1601 East Hazelton Avenue <br /> Stockton, California 95201 <br /> Re: Work Plan-Monitoring Well Abandonment <br /> Shell OR Products Company- Bulk Terminal <br /> 3515 Navy Drive <br /> Stockton, California <br /> WIC No 104-5804-0300 <br /> Dear Mr. Knoll: <br /> • This letter presents a work plan prepared by Pacific Environmental Group, Inc. <br /> (PACIFIC)for the abandonment of one groundwater monitoring well (DW-1) at the site <br /> referenced above (Figure 1). This work plan has been prepared on behalf of Shell Oil <br /> Products Company as requested by the San Joaquin County Department of Public Health <br /> Services. <br /> SCOPE OF WORK <br /> The purpose of this work plan is to provide a description of abandonment procedures for <br /> Well DW-1. This well is located near Navy Drive in the southern portion of the site <br /> (Figure 1). Currently, groundwater is approximately 11 feet below ground surface (bgs). <br /> The well is screened to a total depth of 55 feet bgs. The boring log with well <br /> construction detail, and site safety plan are presented as Attachment A. The well <br /> destruction permit application is presented as Attachment B. <br /> WELL DESTRUCTION PROCEDURES <br /> The monitoring well will be destroyed using a method tentatively approved by the <br /> Regional Water Quality Control Board - Central Valley Region during a phone <br /> conversation with PACIFIC on October 27, 1995. The well casing will be perforated <br /> • throughout the screened section to ensure complete infiltration of the filter pack with <br /> grout. The grout will consist of a mixture of neat cement and 5-percent bentonite. The <br /> well casing will be backfilled with grout through a tremie pipe beginning at the bottom of <br /> 2025 Gateway.Place, Suite 440, San Jose,California 95110 (408)441-7500 FAX (408) 441-7539 <br />