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• the Toxics Characteristic Leaching Procedure(TCLP), and results are submitted as part <br /> of the AHR report. Should Trigen receive coal from a new supply source, additional fly <br /> ash and bottom ash samples will be collected, analyzed and reported. <br /> The CEC operation regarding the dismantling of the on-site coal handling facilities was <br /> completed in 1996. CEC disposed of all non-salvageable components of these facilities <br /> in A-Pit. The facilities areas were then topsanded and revegetated. In accordance with <br /> CDMG Rule 4.11.4, "Disposal of Non-coal Wastes", the coal handling facilities waste <br /> debris was buried to between the limits of five(5) feet above the local ground water table <br /> and four(4) feet below AOC. The bulk of the waste debris was concrete, metal,rubber, <br /> and small amounts of wood; however, no hazardous material or liquid substances were <br /> disposed in this manner. <br /> The location of the on-site overburden soils (the long-term spoil stockpile area) is shown <br /> on the mine plan maps, specifically those presented annually as part of the AHR report <br /> (Appendices M-1, Q-1 and L-5). Soil mass balance calculations are also updated <br /> annually in the AHR report, to provide information on the availability of overburden soils <br /> from the long term spoil stockpile area to supply the required six (6)feet of overburden <br /> soils that are placed over the disposed A/MWR. These calculations also confirm that an <br /> additional two (2) feet of topsand is available to be placed on top of the overburden soil,. _ <br /> to meet the total cover requirement of eight(8)feet. It is unlikely that the long-term spoil <br /> stockpile would ever become inactive due to the WCDH regulations, requiring the <br /> • covering of the A/MWR disposal "face"every 48 hours(the maximum time period). <br /> However, if the long-term spoil stockpile did become inactive,or if both A-Pit and B-Pit <br /> were to be completely reclaimed before the long-term spoil pile could be completely <br /> utilized, any remaining long-term spoil area soils will be graded and tied into the <br /> undisturbed natural terrain,then scarified,topsanded, fertilized and revegetated. <br /> The final Reclamation Contour and Drainage Plan Map(Appendix Q-1)has been <br /> designed to improve and promote positive surface water drainage away from both the A- <br /> Pit and B-Pit cell areas. For this reason, the proposed final ground surface contour <br /> elevations over the pit cell areas have been modified from those initially shown on the <br /> 1986 Reclamation Plan map in order to accommodate the A/MWR disposal and the <br /> backfill operations. The proposed final elevation contours are sloped to provide <br /> maximum air space volumes for the remaining A/MWR disposal operations in each pit <br /> cell, as well as to reduce the potential amount of surface water runoff infiltration into the <br /> subsurface and the potential accumulation of infiltrated.water within the pits and/or <br /> saturation of the disposed A/MWR. The revised design overall serves to improve the <br /> final reclamation condition of the two disposal sites. CEC also contends that this is a <br /> good business practice now that mining is no longer taking place, and since A/MWR <br /> disposal will continue for several years. <br /> 114 7/11 <br />