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• The NH2 baseline surface water monitoring program is outlined in Appendix 15-1 <br />Currerrt Surface Water Monitoring Activities for NH1 and NH2 Mining Area (July 1987 -Preser~ <br />Monitoring activities currently being conducted at the NH1 and NH2 mining areas are described in <br />Appendix 15-1 through 15~. <br />The current surface water monitoring program at NH2 mining area is similar to the baseline <br />monitoring program. Monthly field parameters are still collected at each surface water site if water _ <br />is present at the time of the field inspection. Monitoring site locations are presented on Exhibit <br />2.04.7-1-A of the approved 1996 Permit Application. <br />The above described ongoing surface water monitoring program for the entire New Horizon Mine <br />operation updates the existing monitoring program as described in the 1987 Annual Hydrology <br />Report. As any changes occur in the monitoring program at NH1 or NH2, they will be reflected as <br />minor revisions to the existing permit. <br />• NPDES Mani6oring <br />Several minor modifications of monitoring points at NPDES monitoring sites were made during the <br />1987 water year. As a result of construction activities (approved by CDMG) at several of the existing <br />sedimentation ponds (001, 002, 003, 004, 005, and 006) during 1987, discharge monitoring for <br />compliance with the New Horizon Mine NPDES Permit (040000213) has been altered for each site <br />with regard to the monitoring point below each pond. The resultant change in monitoring points at <br />Ponds 002, 004, 005, and 006 simply involves present and future monitoring for flow and quality at <br />the spillway outlet (drop inlet pipe) constructed at each pond. However, because of requirements <br />by CDMG for continuous monitoring of flow at the 001 pond (NPDES 001), Peabody reestablished <br />the 001 monitoring point just below the newly constructed spillway outlet shortly after construction <br />activities were completed. The reestablished point for the NPDES 001 monitoring site consists of <br />a sharp rested 90'v-notch weir continuously measured by a Steven's Type-F water level recorder. <br />Monitoring will be consistent with the existing NPDES pemtit monitoring requirements (see Tab 7, <br />Appendix 7-6). <br />• <br />(Revised 1231-96~ 1~3 <br />