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Application for Technical Revision to MLRB Permit 80-47 <br />Page 6 of 7 <br />Corehole abandonment: When coreholes drilled as part of these tests are no <br />longer needed they will be abandoned by sealing them with standard oil field cement. <br />Equipment: The following equipment will be required to carry out the <br />experiments. <br />• General truck-mounted drilling equipment and facilities as required for drilling the <br />fractured hole, connector hole, and monitoring holes. <br />• Temporary lighting for work inside the commercial mine. <br />• Water tanks for water used in drilling. ' <br />• Small-scale versions of typical oil-field pumps, tanks, and slurry mixing equipment <br />necessazy to hydraulically fracture the oil shale. <br />• Smal]-scale cement mixing and pumping equipment. <br />• Portable electric generator to energize the fracture. <br />• Readout/recording equipment for temperature and electrical sensors. <br />• Readout/recording equipment for safety electrical monitors. <br />• Office trailers (no on-site living accommodations) <br />Environmental Protection: Since no oil shale will be converted to oil and gas, no <br />hydrocarbons will be released to the environment. Nevertheless, the atmosphere in the <br />mine will be tested twice during each work shift for both safety and environmental <br />reasons. During drilling and fracturing operations appropriate spill prevention measures <br />will be used to insure that no contaminated water is released into surface water. <br />Personnel: It is expected that the maximum number of people working on site at <br />any given time will be fifteen. <br />Timing for Experimental Work <br />ExxonMobi]'s planned timing for activities associated with this work is listed in Table 1. <br />Table 1. Planned Timing of Electrofrac Heater Construction Tests <br />Activi Timin <br /> <br />Initiation of Water Monitoring Program June 2007 <br />Baseline geological mapping and geophysical tests July -August 2007 <br />Early Fracture Pretests October 2007 <br />Drilling and Fracturing for Initial Ex eriments January -February 2008 <br />Electrical Ener In ut to Initial Experiments 15 or 2" Quarter 2008 <br />Financial Warranty: <br />The Exxon Mobil Corporation financial warranty currently in place will cover this <br />experimental work. <br />