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• <br />In order to expedite the review process, a preliminary adequacy <br />review of the NOI was performed concurrently with the completeness <br />review. The Division's adequacy concerns are listed below: <br />1) Page 14 of the NOI states that surface outside the <br />Federal Coal Lands is private or state owned. However, <br />the surface and coal ownership table, presented in an <br />appendix, does not indicate any lands owned by the state. <br />Please clarify. <br />2) Page 17 of the NOI states that Aspen communities exist <br />within the proposed exploration area. Please indicate <br />whether Aspen communities exist on any of the proposed <br />disturbance areas. <br />3) Page 23 of the NOI states that, "In the event of mid- <br />winter drilling when the ground is frozen, excessive snow <br />would be bladed to the side without disturbance of the <br />soil." It is assumed that the excavation of mud pits <br />would still be necessary. Please commit to salvaging <br />topsoil off the areas to be excavated for mudpits as well <br />as the area immediately surrounding the drillhole in the <br />event of mid-winter drilling. <br />d <br />~~D ~ <br />~~~ <br />~b~ <br /> <br />4) The Division approves the use of suitable bentonite <br />products such as Volclay Grout and Pure Gold Grout for ~ <br />sealing and abandoning drillholes (except for a 7-foot <br />cement plug to be installed from 3 to ten feet below the <br />ground surface). These materials are preferable to <br />cement because of the reduced likelihood of shrinking or <br />cracking, as indicated. in the NOI. <br />5) In order to ensure the integrity of any monitoring wells <br />that are completed as part of the exploration program, <br />any bentonite installed below the screened interval of <br />the well should be installed with a tremie pipe which <br />extends to below the screened interval. Pressure <br />grouting from the bottom of the drillhole is preferred <br />and required when aquifers are present. <br />If you have any questions, please call me at (303) 866-3567. <br />S~ ere_ ~y, <br />G/VtT~- ~~ <br />Barbara L. Pavlik <br />Environmental Protection Specialist <br />cc: Larry Routten, DMG <br />Richard Tifft - Whitewood Geologic Group <br />P.O. Box 881215 <br />Steamboat Springs, CO 80488 <br />