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shortest time possible. The applicant has indicated that topsoil that must be <br />stockpiled will be vegetated to prevent erosion. The temporary seed mix to be <br />used for this purpose is located in Exhibit E. <br />The applicant has proposed to control blasting to minimize ANFO use, reduce <br />spillage and minimize un-shot holes to prevent contamination ofgroundwater <br />or topsoil by blasting residues. These provisions comply with Rule 3.1.9(1). <br />16. What methods will be used to segregate topsoil? (Rule 3.1.9(1)) <br />Topsoil and subsoil will be salvaged utilizing heavy construction equipment. <br />GCC will provide equipment operators with maps illustrating topsoil and <br />subsoil stripping depths, and a qualified individual will monitor the stripping <br />operation. The normal stripping depths will be 6 inches for the A Horizon and <br />an additional 12-18 inches for the AC or B horizons. If the topsoil is <br />determined to be less than 6 inches, the upper portion of the AC or B will be <br />salvaged with the A not to exceed 6 inches. However, if the A horizon is deeper <br />than 6 inches, all of it will be salvaged and handled separately, as will the AC or <br />B horizon. Utilizing baseline data, the proposed average stripping depths will <br />be 6 inches for A Horizon and 12-18 inches for the lower horizon, however, all <br />available suitable topsoil and subsoil will be salvaged to whatever depth is <br />available. <br />Vegetation Information <br />17. Will the proposed seed mix be capable of self-regeneration without continued <br />dependence on irrigation? (Rule 3.1.10(1), 3.1.10(5)) <br />In response to questions raised in the adequacy letter, the applicant has <br />proposed a diverse seed mix comprised primarily of native species identified in <br />baseline sampling data and the proposed potential climax community as noted <br />in NRCS range site descriptions of the area. Once established, the proposed <br />mix will give rise to a diverse vegetative community capable of self-regeneration <br />without irrigation. <br />18. Do the proposed seeding methods provide for the greatest probability of success? <br />(Rule 3.1.10(4)) <br />The applicant has proposed a variety of seedbed preparation and seeding <br />methods, depending on the location and season of seeding. These options cover <br />the range of seeding options available including drill seeding, broadcast seeding <br />and hydro-mulching depending on a number offactors including season, slope, <br />and whether a cover crop is utilized. A wide variety of mulching options are <br />also included in the proposal and will be utilized on a case by case basis.