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WORD PLAN FOR INSTALLATION OF <br /> REINIEDIATION WELLS <br /> ARCO STATION 2093, TRACY, CALIFORNIA <br /> This work plan was prepared for ARCO Products Company (ARCO) for continuing <br /> remediation at ARCO Station 2093, located at 3425 Tracy Boulevard, Tracy, California. The <br /> work plan will be submitted to ARCO before commencing work, and all necessary permits will <br /> be acquired from the San Joaquin County Environmental Health Division (County). Work will <br /> commence within 30 days upon approval of this-work plan by the County. <br /> This work plan describes the methods to be used in the field during borehole drilling and <br /> well installation. The work plan also presents a quality assurance and quality control plan for <br /> sample collection, handling, and decontamination procedures in the field. <br /> PURPOSE <br /> This work plan presents the details for installing three air sparge wells, seven dual <br /> completion soil vapor extraction/air sparge wells (VES), and one dual completion groundwater <br /> monitoring/air sparge well. The purpose of installing these wells is to remediate hydrocarbon- <br /> affected soil and groundwater beneath the site. The proposed well locations are shown on <br /> Figure 1. <br /> INSTALLATION AND CONSTRUCTION OF AIR SPARGING WELLS <br /> The wells will be drilled by Turner Explorations of Rancho Cordova, California <br /> (California C-57 License Number 602720), using a truck-mounted, hollow-stem auger drilling <br /> rig equipped with 8- or 10-inch-diameter augers. Each borehole will be advanced to <br /> approximately 30 feet below ground surface (bgs). One or two soil samples for laboratory <br /> analysis will be collected from each of the "VES" boreholes and borehole S-2. Brown and <br /> Caldwell's (BC's) Standard drilling procedures are described in Appendix A. Borehole cuttings <br /> will be temporarily placed on plastic sheeting and covered with plastic. The disposal of these <br /> cuttings is the responsibility of ARCO. <br /> Underground Service Alert will be notified by telephone at least 48 hours prior to <br /> commencement of work, <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 only to the extent <br /> of the scope of wont 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 /> 75245REPORTSIWOR K PLN <br />