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' most of the wells are comprised of 1 foot solid casing sealed with slip-PVC caps <br /> secured with threaded stainless steel screws; five wells have threaded-PVC caps <br /> ' (MWM-9 and -13, and MBRMW-1, -2 and -3). The annular spacing between the <br /> well screen and formation was filled with clean No. 3 sand to a depth of 1 to 2 <br /> feet above the screen. The remaining annular space was filled with 1-foot of <br /> ' bentonite chips followed by 7 feet or more of cement grout installed as a sanitary <br /> seal in the space above the bentonite to land surface. <br /> ' The top of the well-casings were sealed with removable plugs to secure and lock <br /> the well. In agricultural fields, the monitoring wells extend above land surface so <br /> as to be readily discernable during agricultural operations, and the casing and <br /> plug are enclosed in a locking monument style hinged well cover set in concrete. <br /> Permanent protective barriers (bollards) were installed surrounding the <br /> monitoring well cover. Monitoring wells located in residential, park, or paved <br /> ' areas were set below grade and the casing and plug enclosed in flush mounted <br /> traffic rated vault boxes with lids. The vault boxes are set so that drainage is <br /> away from the vault. <br /> tTable 3 summarizes the new wells, their drilling dates, and construction details. <br /> This and additional information such as the well casing length, length and <br /> ' position of the perforated interval, thickness, position and composition of the <br /> surface seal, sanitary seal, and sand pack are reported in graphic form on the <br /> ' well boring and construction logs provided in Appendix A. <br /> 1 <br /> i <br />