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General Project Description: <br />ExxonMobil Upstream Research Company ("URC"), a subsidiary of Exxon Mobil <br />Corporation, has an ongoing research program into oil shale conversion technology. <br />This process involves fracturing the oil shale rock using conventional oil well fracturing <br />techniques, injecting a proppant that will conduct electricity within the fractures, and <br />establishing an electrical current within the propped fracture which may be used to heat <br />the rock resistively. <br />Revision Description: <br />This Technical Revision to State of Colorado Mined Land Reclamation Board Permit No. <br />M-1980-047 requests approval to: <br />Drill two (2) additional water monitoring wells, to expand ExxonMobil's existing <br />water monitoring program. Attachment B includes survey plats, wellbore sketch <br />and reclamation cost information. Both water monitoring wells (WW-CC-ID 1 & <br />WW-CC-SDI) will be drilled from within the mine tunnels and will sample the <br />B-Groove (assuming the presence of water). These wells will be approximately <br />110 feet total depth. These wells will be used to determine water levels within the <br />B-Groove. <br />Ground and Surface Water Monitoring: <br />While the probability of any impact to ground or surface water from the experimental <br />work is extremely small, ExxonMobil has nevertheless implemented a program of water <br />monitoring to allow early detection of any impacts, should they occur. <br />This request for additional water monitoring wells will expand our existing monitoring <br />program approved in TR 11 and TR 13. The monitoring program is focused on the <br />Mahogany zone at and around the location of the commercial mine site. Its objectives are <br />the early detection of any impacts to either the ground water levels or to ground and <br />surface water quality. Currently, water levels and chemical analyses in all our <br />monitoring wells are measured monthly; this practice will be extended to the two new <br />monitoring wells. <br />Surface water samples are taken and flow rates are estimated monthly at two locations ; <br />1) the outflow of water from the mine entrance, and 2) the most downstream point on the <br />Colony property of the East Middle Fork of Parachute Creek. Sampling of the East <br />Middle Fork of the Parachute Creek is subject to stream flow. There is generally no <br />stream flow leaving the Colony property. This monitoring program has detected no <br />change in ground and surface water quality. <br />M-1980-047 Technical Revision 14 Submittal Page 2