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APPENDIX B <br /> WELL COMPLETION <br /> The UVB 400 system will be installed to an estimated depth of approximately 44 feet below the <br /> surface Bentonite seals, artificial pack and portland cement grout will be tremied in the order <br /> and dimensions illustrated in Figure 3. The artificial pack will be sized to allow for retention of <br /> 90 percent of the pack in the borehole annulus The UVB 400 casing will rise 2 feet above land <br /> surface, where the vacuum line connection will be made to the blower <br /> The casing used for a UVB 400 system is 16-in nomimal pipe diameter with a minimum wall <br />' thickness of 0 25" The lower screen is a 16-inch nominal diameter Johnson "Irrigator" screens <br /> The slot size of the lower screen should retain 60 percent of the sand pack The upper screen will <br /> be an EA and EEG® double-cased screen <br /> 1 <br /> WP61 73942 WP 1096 TX 2 1 <br />