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ame <br />3.06 FILL PLACEMENT: <br />Section 02200 <br />Earthworks <br />C. Prior to placement of fill materials, CONTRACTOR shall scarify all in -situ materials to a depth of <br />6- inches, moisture condition, and recompact the subgrade. Compactive effort shall be adequate to <br />obtain a minimum of 95 percent of maximum dry density as determined by the standard Proctor test <br />(ASTM D698) for the particular fill material. Moisture conditioning shall be adequate to achieve a <br />uniform moisture and density. In rock areas, the CONTRACTOR shall prepare the subgrade by <br />removing loose rock fragments until competent foundation material is encountered as approved by <br />CERTIFYING ENGINEER. <br />D. If the underlying material is unsuitable to permit proper compaction of the subgrade, <br />CONTRACTOR shall loosen, aerate (or excavate and remove), and recompact the subgrade until <br />the top layer can be compacted as required. The recompacted surface shall then be scarified, as <br />needed, to provide a good bond between the foundation and fill materials. <br />A. The following general guidelines shall be followed except as noted elsewhere in this Section. <br />1. No fill materials shall be placed until the foundation and subgrade preparations have been <br />completed as specified herein, in Article 3.05 of this Section. The procedures for fill <br />placement shall be approved by MANAGER and CERTIFYING ENGINEER prior to <br />start of fill placement. <br />2. No brush, roots, sod, frozen material, or other deleterious or unsuitable materials shall be <br />incorporated in the fills. The suitability of all materials intended for use in the fill shall be <br />subject to approval by MANAGER and CERTIFYING ENGINEER. Fill placement <br />shall be temporarily stopped by CONTRACTOR due to weather conditions, if materials <br />and installation do not meet the SPECIFICATIONS, at no cost to CC &V. Fill shall not be <br />placed upon frozen material, such as snow or ice. <br />3. If the surface of the prepared foundation or the surface of any layer of the fill is too dry or <br />too smooth to bond properly with the layer of material to be placed thereon, it shall be <br />moisture- conditioned and/or worked with harrow, scarifier, disc, or other suitable <br />equipment to provide a satisfactory bonding surface before fill material is placed thereon. If <br />the surface of the prepared foundation or the rolled surface of any layer is excessively wet <br />for fill materials to be placed thereon, it shall be removed and allowed to dry or worked <br />with a harrow, scarifier, disc, or other suitable equipment to reduce the moisture content to <br />an acceptable level or meet project specifications as determined by MANAGER and <br />CERTIFYING ENGINEER. It shall then be compacted before the next layer of fill <br />material is placed. Determination of such dry or wet conditions shall be made by <br />CERTIFYING ENGINEER. <br />4. The distribution of materials shall be such that the fill is free from voids, lenses, pockets, <br />streaks, or layers of material differing substantially in texture' or gradation from the <br />surrounding material. The material of a fill shall be as described in Article 2.01 of this <br />Section. <br />5. Unless otherwise approved by MANAGER and CERTIFYING ENGINEER, the entire <br />fill surface shall be at or near the same elevation at all times during construction. At all <br />times during construction, the surface of the fill shall be graded and maintained by the <br />CONTRACTOR to prevent ponding of water and to allow for storm water drainage. <br />6. Except as otherwise specified or approved by MANAGER and CERTIFYING <br />ENGINEER, the CONTRACTOR shall dump and spread fill in such a manner so that no <br />S:\Projects \1125G Squaw Gulch Valley Leach Facililty Design \I - Tech Specs \02200.r0.doc <br />Page 8 of 18 January 14, 2011 <br />Revision 0 <br />