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<br />5 <br />p. 4-13 The proposal t:o inject fly ash into the cavities is interesting and <br />could become t~eneficial. What are the leaching characteristics of <br />this fly ash? <br />p. 4-25 The effectiveness of the "rubber beds" in sealing small cracks is <br />questionable, especially if under tension. The statement on <br />Page 4-12 that: "the applicant believes that the likelihood of <br />establishing a physical connection between the mine zone and the <br />groundwater system would be low because of rubber beds and competent <br />oil shale" needs to be verified by monitoring, if possible, during <br />the pilot phase. <br />p. 6.6-2 At the top of the second column, it should refer to "overlying a <br />Class III mine zone" rather than Class II. <br />p. 8-2 Is the "Wheatcraft, et. al." reference utilized in the EIS regarding <br />the potential change in groundwater flow as a result of subsidence? <br />