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Groundwater Monitoring Well Installation <br /> Section 2 <br /> removable cap will provide the protective surface casing. This casing will be cemented in place <br /> from approximately two feet above ground surface to a depth of four feet. A 3.5 x 3.5-foot <br /> square or 3.5-foot diameter circular, 4-inch thick concrete pad will be poured surrounding each <br /> well. For completions in or near public or private roads,the wells will be completed with a <br /> traffic rated Christy box, cemented in place with concrete and slightly above grade. Cement will <br /> be pored around the Christy box and finished such to promote the shedding of surface water <br /> away from the wells. <br /> Well Cap—2-inch diameter expandable, lockable pressure plugs. <br /> Transition Seal—Approximately two feet of bentonite chips or peI lets will be placed on top of <br /> the filter pack providing a transitional seal from the filter pack to the sanitary surface seal. <br /> Surface Seal—All attempts will be made to place a neat cement or cement grout sanitary seal <br /> from the ground surface to a minimum depth of 20-feet bgs and extending to the top of the <br /> bentonite transition seal. However, if a shallow seal is required, it will extend to a minimum <br /> depth of 6 (six)feet below ground surface. <br /> Figures 2-2 and 2-3 depict the typical monitoring well completion details anticipated for the site. <br /> Additionally, special attention shall be given to the construction of the monitoring well to <br /> minimize the potential for contamination of any materials used in the installation. <br /> April 2008 Woodbridge Sanitary District <br /> WBSD07-002 2-5 Groundwater Monitoring Well Installation Workplan <br />