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• Topsoil Redistribution Proper site preparation will precede reapplication of topsoil and subsoil in all reclaimed azeas. Areas disturbed by mining will be subjected to final grading, but will remain in rough condition to assist stability and resist slippage of topsoil after reapplication. Leaving the graded surface in a roughened condition will also improve moisture permeability between the soil/spoil interface. Compacted areas such as roads will be ripped to a depth of 18 inches. The timing of topsoil and subsoil reapplication will be dependent on completion of backfilling and grading. It will be advantageous for reapplication to take place just prior to fall or spring seeding windows. Topsoil and subsoil will be removed from stockpiles using front-end loaders, dozers and trucks. Subsoil will be spread evenly over spoil using dozers and motor graders working along the contour wherever possible. This will be followed by reapplication of topsoil over subsoil using the same technique and equipment. Areas with steep slopes such as the contour mining areas in Lorencito Canyon may preclude redistribution along the contour. Topsoil will then be graded to ensure a uniform and stable thickness consistent with reclamation and revegetation requirements. Prior to seeding, topsoil will be chisel-plowed in order to alleviate compaction and promote water infiltration. Prior to reapplication of stockpiled topsoil and subsoil, representative samples will be • subjected to physical and chemical analyses as required by sections 4.06.2(4) and 4.06.5 of the regulations. Nutrients or other soil amendments will be applied to soil and overburden materials to be used in reclamation if testing indicates deftciencies. Sampling of replaced soils will take place within one year of reclamation. Samples from depths of 0-12 inches and 12-24 inches will be collected on 500 foot centers throughout reclaimed areas. Analyses of the physical and chemical parameters listed in Section 4.06.2(4) of the regulations will be conducted. Atwo-foot thick veneer of low SAR (sodium adsorption ratio) growth medium will be spread over any azeas where the SAR exceed 15. In general, all topsoil and usable subsoil stripped and stockpiled for each facility will be redistributed evenly across that facility. In the unlikely event that a significant surplus of soil has been stockpiled in a specific location it will be utilized in the reclamation at a site deemed to have a topsoil deficit. For the Jeff Canyon Surface Mine, it is estimated that approximately 0.85 feet of topsoil and subsoil (an average of 0.7 feet stripped plus a 20% swell factor) will be evenly respread over the reclaimed area. Additional usable soil may be recovered from areas where mapping shows that less soil or no soil is available. Recovery of this additional soil during stripping will increase the thickness of the respread material. n U LorencitoPmt-PMT(475)Nov2002.wpd Z.OS-59 (revised 2.19.03}