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(Page 2) <br />MINE ID # OR PROSPECTING ID #: M-1978-301 <br />INSPECTION DATE: 10/15/2009 <br />INSPECTOR'S INITIALS THM <br />OBSERVATIONS <br />This inspection was conducted as part of the normal monitoring program established by the Colorado Division of <br />Reclamation, Mining and Safety. <br />This was a partial inspection with the primary focus to observe the field testing of the ElectofracTM process at the <br />ExxonMobil Colony Shale Oil Project. No other components of the mine were inspected on October 23, 2009. <br />Prior to entering the Colony Mine a safety briefing was conducted while the mine air was purged for ten minutes. A <br />fan was brought from the original Colony Pilot Mine to support the field test. The fan is installed to a 24 inch <br />ventilation pipe that runs from the mine bench surface down to the inclined shaft. <br />The ElectofracTM field testing is conducted inside of the north and south drifts of the Colony Mine. The purpose of <br />the test is to determine if fractures located within the Mahogany formation can be modified to become <br />electrically/thermally conductive. Boreholes and various components associated with the testing were observed <br />within the mine. The test was reported to be a success and the fractures within the rock have been determined to be <br />thermally conductive to the testing limits of 140 degrees. The testing temperature was limited in this phase to ensure <br />gasses and kerogen were not liberated from the rock. <br />Water flow was observed at several locations from the roof and walls of the mine and flowing down the incline. The <br />flow from the incline was the largest and was channeled from the incline to the crosscut and then out the north drift <br />to the mine bench. The mine drift lies immediately below the L7, also known as the A Groove aquifer which is the <br />primary source of the mine drainage. The mine has been discharging water since the 1980's when the incline was <br />constructed. The down-gradient water monitoring well that was included in Technical Revision 11 has been <br />installed and was observed during the inspection. <br />No problems or possible violations were observed during the October 23, 2009 inspection. <br />Photos that show the conditions observed during the October 23, 2009 inspection are included at the end of this <br />report. <br />Responses to this inspection report should be directed to Travis Marshall at the Division of Reclamation, Mining <br />and Safety, Grand Junction Field Office, 101 South 3rd Street, Room 301, Grand Junction, Colorado 81501, phone <br />no. (970) 241-2042. <br />I & E Contact Address cc: <br />? CE: <br />NAME: Tom L. Adams <br />OPERATOR: ExxonMobil Corporation <br />STREET: P.O. Box 2567 <br />CITY/STATE/ZIP: Houston TX 77252-2567 <br />? BLM <br />? FS <br />? HW <br />? HMWMD(CH) <br />? SE <br />X Steve Shuey, DRMS <br />X Bill Symington, ExxonMobil