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was pumped at 10 bbls/minute and wellhead <br />treatment pressures of 800-900 psi. This treatment <br />volume was expected to be sufficient for coke <br />slurry to break out on the mine rib. While the <br />coke-cement slurry did not reach the mine rib, <br />green gelled water was observed exiting the mine <br />rib. <br />29th Oil Shale Symposium Page 6 of 13 October 19-23, 2009 <br />Figure 8. Photographs from the Electrofrac fracture job at EF1. <br />Figure 9. Photographs from the Electrofrac fracture job at EF3.