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difference between sample means on the reclaimed area and the reference area when such a difference exist. Appendix 2.4-B has been revised to be consistent with the recommendations in the CDMG guideline. 17. After submitting the revised pages in response to our adequacy issues, P&Mfaxed the Division a page of the SEDCAD+ run for the Trout Creek pump pad sediment control. Please provide the Division with two additional copies for placement in the permit applications on file here. Enclosed with this submittal aze additional copies of the SEDCAD+ run for the Trout Creek pump pad sediment control. This page is to be incorporated into the permit document at the end of Appendix 4.6-P. Response to Comments Dated January 17,1997 As 1 discussed with your earlier today, the Division has further reviewed the Edna Mine permit renewal application. As a result of that review and in addition to the preliminary adequacy cotrcerns previously transnri[ted, ll~e Division is requiring that P&M update the Probable Hydrologic Consequences section of the permit application. P&Mshould update Section 2.5.3, Consequences of Mining, Appendix 2.5-A "Trout Creek TDS Loading Due to Mining" (short term predictions), and Appendix 1.5-8 "Trout Creek Sulfate Loading Due to Mining" so that predictions are based on current conditions. Specifically, P&M should consider the effects on the predictions of monitoring data to date, the development of a spoil spring in the Moffat area, the combination of CDPS outfalls #001, #f-003, and #006 into #007, the addition of the Trout Creek sandstone monitoring well (TRS-I), and the actual extent of mining which took place. The above mentioned section and appendices have been revised to reflect current conditions through 1996. The only item not specifically addressed was well TRS-1 because data from this well is consistent with the statements made in the original discussion regazding the Trout Creek Sandstone. Response to Comments dated May 8, 1997 The following comments address observations of hydrochemical characteristics from recent sampling. These are compared to the narrative of Probable Hydrologic Consequences from the permit and should be included in revision of that section of the permit application document itself. Predicted groundwater TDS to rise to 3000 mg/l (p. 2.5-96).