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Section 816.15^ (d) Continued. <br />• <br />(11) P.11 material used in embankments shall be suitable for use under <br />Paragraphs (d)(1)-(8) of this Section. The material shall be r_asonably <br />free of organic material, coal or coal blossom, frozen materials, wet or <br />peat material, natural soils containing organic matter, or any other <br />material considered unsuitable by the regulatory authority for use in <br />embankment construction. <br />(12) Excess or unsuitable material from excavations, as defined in <br />Paragraph (d)(11) of this Section, shall be disposed of in accordance <br />with 30 CFR 816.71. Acid- and toxic-forming material shall be disposed <br />of in accordance with 30 CFR 816.48, 816.81, and 816.103. <br />(13) Acid-producing materials shall be permitted for constructing <br />embankments for only those Class I Roads constructed or reconstructed on <br />coal processing waste banks and only if it has been demonstrated to the <br />regulatory authority that no additional acid will leave the confines of <br />• the coal processing waste bank. In no ease shall acid-bearing refuse <br />- material be used outside the confines of the coal processing waste bank. <br />Restoration of the read shall be in accordance with the requirements of <br />30 CFR 816.103-816.117. <br />(14) Topsoil or other material suitable under 30 CFR 816.22 shall be <br />placed on all embankment slopes of lv:l.6h cr flatter to aid in esta- <br />blishing vegetation and to minimize erosion. Topsoil material depth <br />s'rall be adequate to support vegetation and to prevent erosion. <br />(16) Temporary erosion-control measures shall be incorporated during <br />construction to control sedimentation and minimize erosion until pe^- <br />manent ccr.trol measures can be established. <br />Prior to the construction of any Class I Road embankment, all <br />vegetative material and topsoil will be removed and stockpiled <br />for la[er redistribution upon road removal. In no instance will <br />vegetative material or topsoil be placed beneath or in any Class I <br />' Road embankment. <br />816-183 <br />