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not it is an aquifer in the proposed mining area. If SCC is proposing that the Twentymile Sandstone is not an aquifer in the area of the proposed mine, then information should be submitted to support that. This is where a more specific identification of geologic units monitored at the Yoast Mine and how these units compare stratigraphically with regional stratigraphy and aquifers would be beneficial to the Division's review of the permit application package. 19) The response to this comment is adequate. 20) See comment #18. 21) The response to this comment is adequate. 22) The response to this comment is adequate. 23) The response to this comment is adequate. 24) The response to this comment is adequate. 25) The response to this comment is adequate. Tab 15 - Hydrologic Monitoring Plan 49) SCC's monitoring plan for YTC32 and YTC33 is acceptable. SCC should be advised, however, that the Division will not likely approve a technical revision which eliminates monitoring of the Trout Creek Sandstone Aquifer, because the requirement for monitoring the aquifer is intended to verify the operator's prediction of no impact or minimal impact to the aquifer. Without monitoring data, this prediction cannot be verified. 50) The response to this comment is adequate. Tab 17 - Probable Hydrologic Consequences 54) The response to this comment is adequate. 55) The response to this comment is adequate. 56) The response to this comment is adequate. 57) a) The response to this comment is adequate. b) The response to this comment is adequate. c) The response to this comment is adequate. d) The response to this comment is adequate. e) The response to this comment is adequate. f) The response to this comment is adequate. g) The response to this comment is adequate. 59) This question has not yet been addressed.