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Mr. Travis Marshall <br />Mr. Kent Walter <br />Ms. Wendy Cheung <br />Page 6 of 6 <br />project. In fact the open annulus at well TM -4 is not unlike numerous wells completed within the Uinta <br />hydrostratigraphic unit elsewhere in the basin which have open intervals extending through the Uinta <br />Formation and transition zone as much as 400 feet or more. <br />To prevent long -term exposure of the unsaturated strata within the Uinta Formation to groundwater <br />produced within the transition zone at well TM -4, AMSO has modified the abandonment procedure for <br />the well as shown in the well abandonment diagram in Attachment E. The diagram indicates that the 1.9- <br />inch tubing will be cut at a depth just above annulus cement (approximately 1,800 ft) using wireline <br />methods and then removed from the well. It is anticipated that any cement in the annulus between the <br />surface and 700 ft will not inhibit removal of the 7 5/8 -inch casing from the free point. Abandonment <br />procedures will include methods to determine free point of the casing, presumably at a depth at or above <br />approximately 700 ft bgs. Once the free point is determined, the 7 5/8 -inch casing will be cut and <br />removed. The well will be grouted with a cement - bentonite grout (bentonite will not exceed 5% by dry <br />weight). Grout should fill the remaining 1.9 -inch tubing and 7 5/8 -inch casing and all uncased borehole <br />space. <br />The abandonment procedure for well TM-4 is summarized as follows: <br />1. Determine the free point of the 1.9 -inch tubing <br />2. Cut and remove the 1.9 -inch tubing <br />3. Determine the free point of the 7 5/8 -inch casing <br />4. Cut and remove the 7 5/8 -inch casing <br />5. Pump and place a cement - bentonite (bentonite not to exceed 5% dry weight) grout into all open space <br />in the well. Bring grout to surface and top -off as needed. <br />6. Remove cellar ring and cut surface casings below existing grade. <br />7. Set well monument marker, if required, and regrade surface. <br />If the 7 5/8 -inch casing cannot be cut and removed above the 700 ft depth, then the casing will be plugged <br />with cement - bentonite grout and the annulus will be plugged as best possible using surface tremie <br />methods. <br />If you have any questions regarding the cement logs and evaluations discussed herein, please contact me <br />at (970) 625 -2227 or by email at Roger.Day(a1iamso.net. <br />Sincerely, <br />American Shale Oil, L.L.C. <br />44, .4 <br />Roger L. Day <br />Vice President of Operations <br />Attachments <br />