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27. Page 2.05.4-6 discusses the Topsoil Removal, Storage and Redistribution <br />Plan. Again, as in question 19 above, (***THIS NUMBER MAY NEED TO <br />BE CHANGED TO CORRESPOND TO PAR NUMBERING***) there <br />appears to be a discrepancy in the volume of topsoil available for replacement. <br />Please take a very close look at this and provide a detailed discussion of how <br />the volume in the topsoil balance was derived. Additionally, please include a <br />table for the topsoil balance. <br />28. Pages 2.05.4-11 and 2.05.4-12 discuss the Sealing or Management of Mine <br />Openings and Boreholes. The discussion of the sealing of boreholes appears <br />to be adequate. The Division, however, requests that Northfield provide <br />detailed diagrams for each of the possible sealing methods described. These <br />diagrams will add clarity to the discussion and allow for a more accurate <br />calculation of the reclamation cost estimate. <br />This completes my review of the operation and reclamation plan for the Northfield Mine <br />permit application. Once the operator responds with the requested information, I will <br />complete a reclamation cost estimate for the site. Please let m know if you have any <br />questions, need any additional information or would like me to review any additional <br />information. I will a-mail you a copy of this memo for incorporation into a letter to the <br />operator. <br />cc: Sandy Brown <br />