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10.1 Mitigation of Friable Rock Deposits <br />It has been noted by DRMS and WFC that occasional deposits of friable shale or claystone <br />deposits are encountered in the Bench 1 overburden during stripping. Since these rock types <br />are undesirable in the Bench 1 material that is placed as either Bench 1 Substitute Subsoil or <br />Spoil, WFC commits to minimizing the presence of this material by visually identifying and <br />removing it during stripping activities. <br />During the stripping of topsoil and Bench 1 spoil material, if any areas of consolidated, but <br />friable rock deposits are encountered, WFC operators performing topsoil stripping will follow the <br />following procedure: <br />1) If the deposits are less than one truck load in size, the shovel operator will load the rock into <br />a haul truck, and instruct the haul truck driver to place the rock material in the backfill area at <br />least eight feet below the topsoil layer. <br />2) If the deposits are greater than one truck load in size, the shovel operator will leave the rock <br />deposit in place. It will than be removed during overburden stripping and placed in the backfill <br />area at least eight feet below the topsoil layer. <br />10.2 Subsoil and Topsoil Placement Equipment and Practices <br />Prime Farmland: Subsoil (Lift B Topsoil /Bench 1 Substitute Subsoil) material will be placed via <br />haul truck and dozer. Prior to the placement of any material, stakes will be placed in the Bench <br />1 overburden and marked with the height that Lift B Topsoil /Bench 1 Substitute Subsoil must <br />be placed to. These stakes will be placed in the overburden on a grid of 100' x 100'. Dozer <br />operators will then spread the Lift B Topsoil /Bench 1 Substitute Subsoil over the area to the <br />height marked on the stakes. This will ensure that Lift B Topsoil /Bench 1 Substitute Subsoil is <br />placed at the appropriate thickness. These stakes will be removed during the sampling of Lift B <br />Topsoil /Bench 1 Substitute Subsoil that takes place as a part of topsoil replacement. This same <br />procedure will be repeated for Lift A/Mixed Topsoil over the same areas. <br />Revised September 2010 (PR 06) 2.05.4(2)(d) -24 <br />