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portions of Units 2, 3, and 4, in addition to the lower part of Unit 1, will likety be projected into the adjacent pit. Lastly, dozers, trucks and shovel will be utilized to remove the remaining overburden/interburden material down to the top of the Lower Dako[a Coal. Where blending or normal burial are ineffective (as defined by the Regraded Spoil Monitoring Program), Unit 1 overburden will be selectively handled to replace afour-foot root growth medium at the regraded spoil surface. In these situations, unsuitable spoil will be topdressed with a minimum of four feet of suitable material [includes replaced topsoil thickness). Lastly, ameliorating reclamation practices will primarily be utilized in those areas where unsuitable spoil reaction, acid-base potential, particle size, saturation percentage, salinity, or sodicity values are ident'rfied by the regraded spoil quality control program. Reclamation practices will include either a selectively handled suitable spoil topdressing or incorporating adequate quantities of agricultural grade limestone. Regraded Spoil Monitoring Program. In order to provide a feedback system to check the reliability of the overburden sampling and analysis program, a regraded spoil sampling program will be initiated. The upper four feet of regraded spoil will be sampled prior to topsoil replacement with a hydraulic soil sampler, a bucket auger, or other suitable equipment to ensure that a suitable root growth medium is provided. Two representative samples, each representing a two-foot depth increment, will be collected by or under the supervision of a soil scientist from a 60 degree slant grid system with 30afoot centers. The vertical sampling increments will be O.O to 2.0 feet and 2.0 to 4.0 feet. The soil scientist will also inspect the surface spoil between grid points. If a significant change in spoil characteristics is observed between grid points, additional sample sites will be located. Regraded spoil will also be visually inspected for compaction, possible root growth problems, and the potential for slippage at the topsoil/spoil interface. The lateral and vertical sampling intensities will be mare closely evaluated once sufficient samples are collected to determine the degree of sample variability. This sampling program will ensure that the top four feet of regraded spoil is non-toxic and chemically/physically suitable to enhance plant growth. Regraded spoil samples will be analyzed for the following parameters to determine spoil suitability: pH, acid base potential, particle size (texture), saturation percent, EC, and SAR. The parameter list is based upon the baseline information acquired during the premine overburden sampling program (Section 2.04.6). The parameter list will be more closely evaluated once sufficient samples are collected to determine the degree of sample variability. This approach will help to eliminate unnecessary and unwarrantable analyses cost and data duplication. This parameter list represents those characteristics of the overburden and interburden which may affect plant growth on regraded spoil. Laboratory procedures and suitability criteria will be identical to those described in Peabody Attachment 6-1, Tables 6-1-2 and 6-1-3.