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,W. <br /> t$ <br /> Coca-Cola Enterprises - West <br /> Job No. 90054 <br /> screen placed above the static water level to allow for water level fluctuations. About 50 to 60 <br /> ra feet of blank PVC casing was added to bring the well to existing surface grade. Following the <br /> installation of the slotted and blank PVC casing, the annulus of each well was packed with <br /> t.� <br /> Number 2/12 RMC: Lonestar silica sand from the bottom of the borehole to a height of about <br /> 2 feet above the top of the well screen. A 2 to 3-foot thick bentonite seal using 1/4-inch <br /> bentonite pellets was placed on top of the silica sand pack and hydrated with about 10 gallons <br /> of potable water. The remaining annular space was then sealed with a cement grout (nine sack <br /> s mix). All groundwater monitoring wells were completed with flush-mounted,water-tight,traffic <br /> i--s rated well vaults set in 2-foot by 6-inch thick concrete pads. The installation permits for each <br /> well are presented in Appendix D. The typical groundwater monitoring well construction <br /> details are illustrated on Figure 4. A summary of the boring and groundwater monitoring well <br /> construction details is presented in Table 1. <br /> 3.5 GROUNDWATER MONITORING WELL DEVELOPMENT <br /> Each groundwater monitoring well was developed to ensure the screen transmits groundwater <br /> that is representative of the groundwater in the surrounding formation and to increase well , <br /> efficiency. All groundwater monitoring wells were developed with a bailer and surge block. <br /> Following surging,.about five well volumes were bailed from the well to remove sediment from <br /> e <br /> the bottom of the well and visually inspected until the turbidity of the discharge was <br /> F <br /> determined by a USTEC hydrogeologist to be the best obtainable. <br /> i <br /> All water from the development process was contained in Department of Transportation (DOT) <br /> Y•9 - <br /> i approved 55-gallon steel drums. Due to very low concentrations of contaminants in the <br /> groundwater as indicated by the analytical results, the development and purged waters will be <br /> 1 <br /> ' aerated on-site. Analytical results are discovered in Section L.2 of this report. <br /> i4. <br /> i ` <br /> 7 <br /> i <br />