PERMFILE41144 - Laserfiche WebLink

Home Browse Search

-- -- II I I II I II I II IIII III Doc Date:12/11/2001 sss Rule 4.05 S1is~ 4.05 HYDROLOGIC BALANCE 4.05.9 Impoundments Two of the four impoundmenu constructed for sediment and drainage control were approved by the DMG as permanent facilities in November 1985. They are Pond HG-8 (NPDES outfall No. 004) and the Shop pond (NPDES outfall No. 003). HGCC will either obtain DMG approval for permanent impoundment status for the other two ponds, Explosives Storage area pond (outfal1001) and Landfill area pond (outfall 002), or completely reclaim the ponds. Previous HGCC submittals to DMG (August 12, 1991; TR-60) have demonstrated that the drainage areas for the Shop, Explosives and Landfill ponds all generate zero runoff, hence zero sediment and outflow. References on pond design can be found in Appendix A, Volume II, Exhibit K, Exhibits Volume I and Exhibit U in Exhibits Volume II of the initial permit application. 4.05.13 Surface and Ground Water Monitoring All surface and ground water monitoring during mining was condutted in accordance with DMG approved monitoring plans and methods. Water monitoring equipment, devices and structures were removed in accordance with Rule 4.07 except for wells and devices used for current, ongoing water sampling. Current water sampling procedures and sites aze described below and monitoring sites are shown on Map 4, Environmental Monitoring and Sampling Sites (see map pockets in • Exhibits). Ground Water Section 2.04.7(I/olume IJ, Appendix L (I/olume Sf, and Appendix R ([/plume 1/IIJ of the initial permit application contain information on ground water. Current groundwater monitoring at the mine consists of semi-annual sampling of two monitor wells and semi-annual water level readings of a third well. Well HG-1 is located down dip of the reclaimed shop area, HG2 is located down dip of the reclaimed mine azea and UC-2 is located west of the previous mine facilities area. Wells HG-1 and HG-2 are monitored for water quality and water levels in eazly summer/late spring and again in late summer/eazly fall. Well UC-2 is monitored semi-annually for water levels only. During the January 1987 permit renewal, the MLRD found that ground water monitoring at the mine site had provided adequate quantitative information during the first permit term, but marginal qualitative information due to suspected grout contamination of monitor wells. Consequently, the Division imposed the following stipulation: Stipulation No. 3 THE PERMITTEE SHALL SUBMIT AN EVALUATION OF THE MINE AREA WELLS FOLLOWING DEVELOPMENT WORK AND SUBSEQUENT • MONITORING ON OR BEFORE MAY 15, 1987. SHOULD WELLS CONTINUE TO EXHIBIT CHARACTERISTICS OF GROUT CONTAMINATION, THE PERMITTEE SHALL SUBMIT A REVISED GROUND WATER MONITORING PLAN FOR MONTTORING THE LOWER AND UPPER COAL UNTCS BY MAY 15, 1987. `rK-63 9o/v/46 H\IITPERMITRULEWS.HG 4.05-1 ///166 Sulit*~17YA` P.~01/16 S.ttpm rpl