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wells within this region to extend out beyond a one mile radius <br /> from the planned point of injection. Because our calculations <br /> suggest the injected fluids will migrate less than 1/4 mile away <br /> from the well bore, this will provide more than adequate <br /> protection. <br /> Also, to insure the safety and reliability of the injection zone <br /> and as a standard procedure in the permitting process, the zones <br /> of injection will have injectivity tests performed prior to the <br /> granting of a permit for continuous operation by Federal, State, <br /> and local authorities. <br /> To more pictorially illustrate the subsurface conditions and how <br /> it relates to the question of waste disposal suitability, Exhibit <br /> No. 3 shows in three dimensions a block of the subsurface <br /> surrounding the PSE property. Again, the sandstones discussed <br /> are in yellow and brown. The injected fluids shown in red, are <br /> Cr isolated from the surface groundwater (blue) by confining layers <br /> of clay (gray) . The stippled areas at shallower depths are <br /> likewise sandstone bodies interlayered in clay-rich rocks <br /> (non-colored areas) . These clay layers will also aid in <br /> preventing any vertical migration of fluids to the near surface <br /> groundwater. <br /> In addition to geological structures which will protect the <br /> drinking water, construction of the injection well is done in a <br /> fashion as to afford maximum protection to the drinking water. <br /> Typical well construction is shown in Exhibit No. 4 and is _ <br /> discussed below. <br /> A well is constructed in stages. First a hole is drilled to a <br /> level below all drinking water. A steel pipe, known as casing, <br /> is installed the full length of the well bore and cemented in <br /> place. This provides a barrier of cement and steel to protect <br /> Lthe drinking water. <br /> WILSON ZUBLIN INC. <br />