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All existing sampling points in the program are shown in the figure included as <br />Attachment D. Currently, water levels are measured monthly in the existing wells, and <br />samples for chemical analysis are taken from these same wells on a monthly basis. <br />Operational Considerations: <br />Land Disturbance: There will be no new surface disturbance, other than temporary <br />while the four (4) monitoring wells are drilled. <br />Drilling: The four (4) water monitoring wells will be air - drilled. See Attachment B <br />for water monitoring wellbore sketch information. The drainage holes will be drilled <br />using water. <br />Water Discharges: The four (4) water monitoring wells will be air - drilled, so no <br />water discharge will be associated with the drilling. The drainage holes will be <br />drilled with water. Water used for drilling the drainage holes will be extracted from <br />surface water on the property, using ExxonMobil's existing water rights. No drilling <br />additives will be used, and this water will be returned to the surface water system as <br />part of the mine outflow. <br />Wellbore abandonment: Water monitoring wellbores drilled under this Technical <br />Revision will be abandoned by sealing them with standard oil -field cement. See <br />Attachment B for Reclamation costs. If casing is not required for the drain holes, <br />they will be abandoned as -is with no additional plugging operations needed. If casing <br />is required, they will be abandoned by filling with standard oil -field cement. See <br />Attachment C for Reclamation Costs. <br />Timing for Drilling: <br />Pending DRMS approval, ExxonMobil plans to commence drilling these water <br />monitoring wells and drain holes in November, 2010, or as soon as DRMS grants <br />approval. <br />Financial Warranty: <br />The Exxon Mobil Corporation financial warranty currently in place will cover this <br />drilling and all reclamation costs. <br />Verification: <br />The undersigned, executing this application on behalf of Exxon Mobil Corporation, <br />verifies that the foregoing information is true and accurate and commits to the <br />Technical Revision Submittal <br />