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the Toxics Characteristic Leaching Procedure (TCLP), and results are submitted as part of the <br />AHR report. Should Trigen receive coal from a new supply source, additional fly ash and bottom <br />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 in A -Pit. <br />The facilities areas were then topsanded and revegetated. In accordance with CDMG Rule <br />4.11.4, "Disposal of Non -coal Wastes", the coal handling facilities waste debris was buried to <br />between the limits of five (5) feet above the local ground water table and four (4) feet below <br />AOC. The bulk of the waste debris was concrete, metal, rubber, and small amounts of wood; <br />however, no hazardous material or liquid substances were disposed in this manner. <br />The location of the on-site overburden soils (the long-term spoil stockpile area) is shown on the <br />mine plan maps, specifically those presented annually as part of the AHR report (Appendices M- <br />1, Q-1 and L-5). Soil mass balance calculations are also updated annually in the AHR report, to <br />provide information on the availability of overburden soils from the long term spoil stockpile <br />area to supply the required six (6) feet of overburden soils that are placed over the disposed <br />A/MWR. These calculations also confirm that an additional two (2) feet of topsand is available <br />to be placed on top of the overburden soil, to meet the total cover requirement of eight (8) feet. It <br />is unlikely that the long-term spoil stockpile would ever become inactive due to the WCDH <br />regulations, requiring the covering of the A/MWR disposal "face" every 48 hours (the maximum <br />time period). However, if the long-term spoil stockpile did become inactive, or if both A -Pit and <br />B -Pit 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 undisturbed <br />natural terrain, then scarified, topsanded, fertilized and revegetated. <br />The final Reclamation Contour and Drainage Plan Map (Appendix Q-1) has been redesigned as <br />a result of cessation of ash acceptance and will continue to promote positive surface water <br />drainage away from both the A -Pit and B -Pit cell areas. For this reason, the proposed final <br />ground surface contour elevations over the pit cell areas have been modified from those initially <br />shown on the 1986 Reclamation Plan map in order to accommodate the A/MWR disposal and <br />the backfill operations. The proposed final elevation contours are sloped to reduce the potential <br />amount of surface water runoff infiltration into the subsurface and the potential accumulation of <br />infiltrated water within the pits and/or saturation of the disposed A/MWR. The revised design <br />overall serves to improve the final reclamation condition of the two disposal sites. CEC also <br />contends that this is a good business practice now that mining is no longer taking place, and <br />since ash disposal is discontinued. <br />114 06/16 <br />