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<br />Ms. Christine Johnston <br />Mountain Coal Company <br />Page 2 <br />February 27, 1997 <br />minor revision to the permit. The Division provides the following responses to the items listed <br />in MCCs February 10, 1997 letter. <br />Refer to MR-208 deemed incomplete as discussed above. <br />2. The locations of inflows have been shown on maps in previous Annual Hydrology <br />Reports (AHRs); however, the quantity and duration of inflows with respect to specific <br />inflow locations has not been provided. Only a very general discussion of estimated <br />quantity and duration of flow has been provided in the 1993, 1994, and 1995 AHRs. <br />Changing inflow conditions within the mine have produced much lazger quantities of <br />groundwater, which requires proper handling and treatment. Because of the potential for <br />significant off-site impacts as a result of the increased mine inflows, the Division is <br />requesting that more detailed reporting on the quantity and duration of inflows be <br />provided specifically with respect to each location of inflow. . <br />The Division is requesting that MCC specifically identify the location of mine inflows, <br />duration and quantity of inflow at each location of significant inflow, and location and <br />methodology of mine water routing and Bumping of inflow water. The permit document <br />should be revised as appropriate to reflect the methodologies for obtaining the quantity <br />and duration of flow at each location of significant inflow and include a discussion of the <br />procedures and methods used for mine water routing and Bumping. Upcoming AHRs <br />should provide information on quantity and duration of inflows at specific locations, and <br />provide detailed information on the locations and quantities of mine water routing and <br />Bumping. <br />3. The Division acknowledges that MCC will attempt to collect the required field parameters <br />and flow eazlier in the third sampling period. The Division believes that more useful <br />information is provided by obtaining a water sample early in the third sample window <br />rather than reporting a no flow condition late in the third sample window. No further <br />response is required. <br />4. Preparing the AHRs to include compiled and reduced data in the form of tables and <br />graphs is both a useful and acceptable format for report presentation. The Division <br />requests that this format for reporting continue for all future AHRs. To aid the Division <br />in performing its review of future AHRs and to verify compliance, we are requesting that <br />laboratory data sheets and chain-of-custody forms be provided as Appendices to the AHR, <br />beginning with the Water Year 1996 AHR. Please revise the permit document to reflect <br />this change in reporting procedure for future AHRs. <br />