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JUL 9 '98 16:59 FROM GETT' FR-RYAN INC T4 12094683433 PAGE.006i010 <br /> Work plan for W=Wel!D=t=tion-Tcxo BF 76 Bmmdod F26lity No. 11195 <br /> July 9. 1998 <br /> Tnsh 2: C2SiU8 PerfOMUQU <br /> After the open portion of the well is grouted, the water well casing will be perforated from <br /> a doth of 80 feet bgs to the depth of any sanitary cement seal in the well. The presence <br /> of a cemmt seal will prevent perforation of the cas;elg within the depth interval of the seal. <br /> If no sanitary seal is encountered, the casing will be perforated to the surface. <br /> The casing will be perforated using a Mills perforation tool. The perforations will be <br /> approximately 8.25-inch wide by 3-inch long slots. A set of four perforations will be <br /> made at each one foot of increment of depth within the casing. The four perforations <br /> within a set will b2 placed 90 degrees apart from each other. <br /> Task 3: ire Grouting <br /> FoRowmg prrforution of the well casing, the remaining portion of the water well (80 fc:t <br /> bgs to the surface) will be grouted to the surface with Portland cement grout. The grout <br /> will be placed from the depth of 80 feet bgs to the surface by the use of a tremie pips and <br /> a grout pump. The grout pump will then be plumbed directly to the well casing and <br /> additional grout will be pumped into the well. Pumping pressure will be maintained until <br /> the level of cement in the well stabilizes. All groundwater expelled during the grouting <br /> operation will be contained and stored on-site as described in Task 1. <br /> REFORTING <br /> The results of the water well destruction activities will be documented in a technical report. <br /> Sampling methods, laboratory analytical reports and chain-of-custody documentation for the <br /> groundwater samples oollected from the water well will be included in the report. A copy of the <br /> report will be submitted to the SJCEHD. <br /> ternm.o� 3 <br />