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' a potable water supply was conducted. A 2-inch water supply line was <br /> discovered on the west site of Building 5 (refer to Figure 2). A high pressure <br /> fire protection water line existed on the east side of Building 5. The <br /> Halliburton pump truck was filled from the 2-inch water supply line. It is our <br /> understanding that water at the Lodi Facility is from the local municipal <br /> ' drinking water supply (verbal communication with a City of Lodi Water and <br /> Sewer Department employee during an Underground Service Alert check). <br /> Jet grouting operations were completed the afternoon of June 3, 1992. <br /> Equipment used for the jet grouting operation was demobilized on June 3. <br /> A backhoe, dump truck, concrete saw equipment and construction crews were <br /> mobilized to the site on June 11, 1992 to complete the well abandonment <br /> services. This equipment and these crews were demobilized on the same day. <br /> 1 <br /> 2.0 WELL ABANDONMENT METHODOLOGY <br /> 2.1 Equipment - Equipment utilized to complete the jet grouting abandonment <br /> procedure included the following: <br /> ' o Mobile B-52 rig drill with a manual 4-jaw rod chuck supplied by BSK <br /> ' & Associates; <br /> o Two-ton flatbed support truck supplied by BSK & Associates; <br /> o Recirculating Cement Mixer - RCM® System (Model HT-400) <br /> cementing trailer supplied by Halliburton Services; <br /> ' o Twin-bin, dry grout-mix truck supplied by Halliburton Services; and, <br /> ' o High-pressure grout swivel, HP 90 (13/a-inch nominal O.D.) drill stem, <br /> and jetting subs and bits supplied by Halliburton Services. <br /> 2.2 Procedure - The first step in the abandonment procedure called for alignment <br /> of the rig drill rod chuck over the monitoring well casing. Upon completion <br /> of this initial step, a jetting bit and sub was connected to a length of HP90 <br /> ' drill stem and positioned through the rod chuck. Subsequently, lengths of drill <br /> stem were added until the bit was near the bottom of the well at which time <br /> the high-pressure grout swivel was connected to the stem. The swivel was <br /> attached to a guide cable running the length of the drill rig tower with a chain <br /> to limit rotation of the swivel. The swivel hose was connected to the RCM® <br /> cementing trailer which, in turn, was connected to the truck containing the dry <br /> grout-mix. <br /> The dry grout-mix was transferred pneumatically from the twin-bin truck to <br /> the RCM® cementing trailer (pump truck) where the dry powder was mixed <br /> 2 <br /> &Associates <br />