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Mr. Steve Self - 2 - March 26, 1991 set forth in public documents or plans, such as permits or approvals issued by local, state or federal agencies, the permittee must modify the Mined Land permit to eliminate discrepencies. Modifications of this nature would be accanplished through the permit revision process. Blowing Coat Oust and Potentia] Hydrologic Impacts A review of the hydrologic baseline information contained in the Eastside permit document and the upstream and downstream surface water monitoring conducted by Eastside since 1985 supports your assertion that the Eastside operations have not diminished the water quality in Harvey bap or the Farmer's Ditch below the mine. Data from indicator parameters such as conductivity, pH, total dissolved solids, sulfate and sodium, which could possibly be elevated as a result of mine water discharge or leaching of drainage water through coal fines, have been examined. The data does not indicate that detectable trends exist. These evaluations were based on a same day comparison of upstream and downstream sampling stations, and on a comparison of baseline data with subsequent monitoring data. Compliance with the aRDroved air pollution control plan and permit should be sufficient to minimize the hydrologic impacts associated with blowing coal dust and to prevent material damage to Farmer's Ditch water which is used for both domestic and agricultural purposes. The Division will insure that this is the case through regular site inspections, periodic hydrologic monitoring and consultation with the Air Pollution Control Division (AP CD ), We have requestd that APCD conduct a site inspection upon resumption of mining operations. The surface water description and hydrologic impact mitigation sections of the permit application will need to be revised to acknowledge and describe the domestic use of Farmer's Ditch water. These sections should also discuss the potential impact of the operation on the domestic use. This information should be included within a technical revision application to be submitted no Later than May ], 1991. Since the letter which Eastside sent to Farmer's Ditch shareholders did not specifically inquire as to whether the water was used for drinking, tine impact evaluation in the technical revision application should include the assumption that the water is usea for drinking. To summarize, we are requesting the following .in.fnranation Documentation cf county approval a~~d to::'ii ~~:atian of EasttsidF c:oa1 Company's intent to mine at a limited pradriction level, or submittal of a Notice of Temporary Cessation by April 15, 1991. 2. Submittal of a technical revision application addressing domestic use of Farmer's Ditch water and potential impacts of the Eastside Mine on that use by May 1, 1991,