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pack followed by 9-sack, sand-cement slurry grout, tremmied to near the surface. <br /> A 12-inch diameter protective outer casing, cemented with concrete ready-mix, will <br /> complete the sanitary/surface seal. Typical well construction details are shown on <br /> Figure 3. <br /> 3.2 Well Development <br /> The wells will be developed after allowing the grout seal to set for a <br /> minimum of 24 hours. The wells will be developed by air-lifting techniques, <br /> followed by pumping with a submersible pump. A well will be considered <br /> developed when sufficient groundwater clarity is achieved and a minimum <br /> submersible pump purge rate of 20 gpm is maintained for at least thirty minutes. <br /> The submersible pump shall be packed off, isolating it from the upper well, at a <br /> depth no to exceed ten feet above the top of the well screen. The pump will then <br /> be used to withdraw groundwater from the screened section of the well. <br /> 3.3 Well Installation Soil Cutting Sampling <br /> Once the wells have been installed and developed, samples of the <br /> stockpiled drill cutting soils returned to the surface will be collected. One <br /> composite sample from each stockpile will be collected and analyzed for <br /> compounds of concern. Based on the analytical results of these samples, the <br /> stockpiled cuttings will be disposed at a regulated waste disposal facility or will <br /> be spread out on the surface in the vicinity of the well site. <br /> 3.4 Well Surveying <br /> Following well installation and development, the wells will be surveyed for <br /> horizontal control and for vertical elevation in relation to Mean Sea Level. These <br /> elevations, surveyed to 0.01 feet, will be referenced when collecting static water <br /> levels for preparation of groundwater potentiometric surface contour maps. <br /> 6 <br />