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refers to monument monitoring at gas well locations in minimal detail <br />regarding location and position, monitoring frequency, the start and end of <br />the monitoring period, etc. Please provide more detail in Exhibit 24 <br />concerning the use of subsidence monuments at each structure to be <br />undermined. <br />29. On page 2.04-11 c (1/10/11) it appears that the first two sentences needed to <br />be deleted to flow with existing and revised text. Please review and <br />correct as necessary. <br />30. Please provide a new page vi, List of Maps, indicating new revised <br />dates for the pertinent maps revised under this revision. <br />31. On page 2.05-59, paragraph one refers to the "Anderson" well. Should this <br />well be the "Armstrong" well? Please correct as necessary. <br />Our decision deadline for TR-56 has been extended to May 18, 2011, as <br />requested, to allow time for a response and review of the same. If you have <br />questions, please call me. <br />Since ely, <br />64,t-? <br />Kent A. Gorham <br />Environmental Protection Specialist III