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! • <br />Holes planned for hydrologic monitoring well completion are PEDS-20, PEDS-2, <br />PEDS-9, and PEDS-10. These will be completed into the Middle Sandstone, <br />Twentymile Sandstone, and White Sanstones respectively, per our conversation <br />of today. As discussed, the State Engineer's Office will be notified as <br />discussed, and monitoring wells installed under this program will be registered <br />within one year as neccessary. <br />Methods of assuring ability to control and contain water flows of exploration <br />wells - <br />Prior to drilling exploration wells, approximately 60 - 80 feet of 7" I.D. {7 5/8" <br />O.D.) steel surface casing material will be installed and grouted into <br />unweathered and competent strata. The top of the surface casing will be <br />threaded, thereby enabling the opportunity to attach a wellhead with a shut off <br />valve. <br />This configuration of shut off valve and wellhead will allow the ability to restrict <br />any surface flow that normal abandonment procedures cannot control. In the <br />unlikely event that normal cementing and abandonment practices are unable to <br />be completed by on-site equipment, this well cap would be installed to contain <br />the flow. At this point in time Halliburton Well Service Company would be <br />contracted to provide a high pressure grout abandonment. Halliburton typically <br />will adjust calcium levels in the pressure grout system in order to control and <br />adjust cement set times. <br />Typical cementing of flowing wells will be similar to that of non-flowing wells. <br />Drill steel, or 1" pipe will be installed in the well, at or directly above the target <br />aquifer. Cement slurry, or bentonite gel, will then be pumped through the pipe <br />and into the aqufer. After completion of the lower section, a portion of the pipe <br />will be withdrawn from the hole, and the top section of the hole will be grouted. <br />A construction dewatering permit application for the discharge of water <br />encountered during the drilling process has been submitted to CDOH, and is <br />pending. As discussed, water flows will be handled by means of the mud pits <br />or a vac truck until such time as the dewatering permit is issued. <br />Once the dewatering permit is issued, water wil! be discharged in a manner <br />approximating the following: small cuts between mud pits will be made or small <br />PVC pipes will be installed to allow water flow from one pit to the next, in series. <br />The flows will travel the length of each mud pit to take advantage of any <br />increase in settling time. If a flocculant must be added, it will be injected into <br />the first pit. Once flow has travelled through the mud pits, it will be conveyed to <br />the edge of the pad by a small ditch or berm. Small notches, water bars, straw <br />bales, or silt fence segments will be utilized to spread and dissipate flow <br />overland along the ditch away from the pad, and to decrease the potential for <br />erosion. <br />