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I <br /> S- <br /> c. Ream the top 50 feet of hole to approximately 36 inches in <br /> diameter; install 30-inch-diameter conductor casing, and grout <br /> backfill from bottom of the conductor to the ground surface. <br /> d. Ream the pilot hole to the final diameter and depth. <br /> e. Conduct caliper(diameter) survey of the reamed hole. E <br /> f. Install production casing, screen, and 4-inch gravel fill pipe into <br /> bored hole. <br /> g. Install gravel pack to 100 feet from the finished ground surface. r <br /> h. Construct a sanitary seal around the well casing extending down <br /> into the well 100 feet from the finished ground surface. <br /> i. Develop well. J, <br /> j. Test pump well. <br /> k. Conduct well plumbness and roundness surveys. <br /> I. Video inspect well with a camera with side scan capabilities. _ <br /> m. Disinfect well and test for bacterial contamination. <br /> n. Perform all specified operations incidental to well construction such <br /> as permits, logs, filing of records, temporary capping, and cleanup. <br /> 2. Construction requirement for this well is: <br /> a. Pilot Hole— 12-inch diameter min. x 1,000 feet (approximately) <br /> b. Finished Bore Hole —24-inch diameter x 1,000 feet (approximately) <br /> c. Conductor Casing - 30-inch diameter <br /> d. Casing Outside Diameter-- 18-inch <br /> e. Sanitary Seal Outside Diameter--24-inch <br /> f. Casing Material —Stainless Steel —550 feet (approximately) <br /> g. Screen Material -- Stainless Steel Wire Wound —450 feet cJ <br /> (approximately) <br /> h. Drilling Method — Reverse Rotary <br /> B. Nested Monitoring Well: (Bid Item No. 2) <br /> 1. The work includes construction of a Nested Monitoring Well (multiple <br /> completion monitoring well) that is gravel packed and provided with four <br /> (4) sampling pipes consisting of well casing and screen, developed and <br /> ted. The work includes: <br /> a. Drill the top 50 feet of hole to approximately 36 inches in diameter, v <br /> install 30-inch conductor casing, and grout backfill. <br /> b. Drill the well to the final diameter and depth. <br /> c. Perform E-log, sieve analyses, water quality sampling, and well <br /> design. <br /> d. Install four (4) separate sample pipes consisting of casing and <br /> screen into the bored hole. <br /> e. Install 4-inch gravel fill pipe into the well 100 feet from the finished <br /> ground surface. "lt <br /> f. Install gravel pack to 100 feet from the finished ground surface. <br /> g. Construct a sanitary seal around the well casing extending down gZ; <br /> into the well 100 feet from the ground surface. 2� <br /> h. Develop each sample section. i <br /> L Conduct well plumbness and roundness surveys. <br /> Division III- i 1 <br />