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WORK PLAN FOR <br /> DESTRUCTION OF OFF-SITE GROUNDWATER MONITORING WELL ATR-12 <br /> FOR ARCO FACILITY 2093, TRACY, CALIFORNIA <br /> This work plan has been prepared by Brown and Caldwell on behalf of ARCO Products <br /> Company (ARCO). The proposed work is to provide for the destruction of the off-site <br /> groundwater monitoring well ATR-12 in the vicinity of ARCO Facility 2093, located at 3425 <br /> Tracy Boulevard, Tracy, California. The work plan will be submitted to ARCO, the County <br /> of San Joaquin Environmental Health Division (County), and the California Regional Water <br /> Quality Control Board (RWQCB). The proper destruction well permit will be obtained prior <br /> to destroying the off-site groundwater monitoring well. The Site Safety and Health Plan <br /> (SSHP) prepared from a master plan for all northern California ARCO stations with site <br /> specific information, dated December 20, 1994, will be implemented and retained on-site <br /> during the field work. <br /> This work plan describes the methods to be used in the field to destroy the off-site <br /> groundwater monitoring well. This plan proposes a project schedule for work at the site and <br /> the timely submittal of a site summary report to the County and RWQCB after the completion <br /> of this work. <br /> SITE BACKGROUND <br /> Well ATR-12 is an off-site up gradient well that was installed in 1990. The well is <br /> constructed of PVC casing and is approximately 25 feet deep. Well ATR-10 is also an-up <br /> gradient well constructed in 1990. Both of these wells have been sampled on a quarterly basis <br /> since they were installed. Hydrocarbons have not been identified in either well since sampling <br /> began. Well ATR-12 is not accessible for sampling because of a faulty traffic box. The San <br /> Joaquin County Public Health Services, Environmental Health Division (County) has verbally <br /> approved the destruction of well ATR-12 rather than replacement of the traffic box based on <br /> the historical analytical results and the presence of the other up gradient well (ATR-10). <br /> SCOPE OF WORK <br /> This section describes the proposed scope of work for the destruction of off-site groundwater <br /> monitoring well ATR-12. Figure 1 shows the location of well ATR-12. <br /> This report was prepared in accordance with the standards of the environmental consulting industry at the time it was <br /> prepared. It should not be relied upon by parties other than those for whom it was prepared, and then onty to the <br /> extent of the scope of work which was authorized. This report does not guarantee that no additional environmental <br /> contamination beyond that described in this report exists at the site, <br /> 26401REP0RTS12640-01.WP <br />