2012-12-27_REPORT - M1980244 (17)

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Section 02200 Earthworks A. Stripping of the topsoil shall be done within the entire area of the stripping limits. amec B. CONTRACTOR shall excavate and remove topsoil in a manner that will minimize contamination with other soil horizons, and will take such measures as are necessary to ensure that the removal of topsoil does not result in erosion or excessive sedimentation. C. CONTRACTOR shall stockpile topsoil at locations designated by MANAGER. Stored topsoil shall not be disturbed by mining, leaching operations, or construction activities, and shall be protected from wind and water erosion, compaction, and contamination. D. CONTRACTOR shall grade topsoil stockpiles to prevent erosion and ponding of precipitation in the stockpile areas. The maximum topsoil stockpile height will be approved by MANAGER. The CONTRACTOR shall protect stockpiled topsoil by an effective cover of non - noxious, quick - growing, annual, and perennial plants, approved by MANAGER, which shall be seeded or planted during the first appropriate growing season after removal. 3.03 WASTE REMOVAL: Waste material is defined as material too wet, too dry, frozen or containing ice or snow, containing organic or other deleterious matter, having poor characteristics of grading or compaction, having other characteristics that may result in undesirable settlement or other movement of the fill, or within the fill, or otherwise not meeting the requirements of the SPECIFICATIONS, provided that this definition permits drying, water, and any other processing or reprocessing to make the material stable and suitable prior to incorporating it into the fill as permitted in the SPECIFICATIONS or by the MANAGER and CERTIFYING ENGINEER. A. CONTRACTOR shall excavate and remove waste in a manner that will minimize contamination with other soil horizons. B. CONTRACTOR shall stockpile removed waste at locations designated by MANAGER. 3.04 EXCAVATION: A. CONTRACTOR shall perform excavation to the lines and grades shown on the DRAWINGS or as directed by MANAGER. No excavation shall begin until the CONTRACTOR has provided construction staking for the proposed work. B. CONTRACTOR shall prevent the disturbance of surrounding areas during excavation. Where selective excavations are required to obtain materials for Structural Fill and Select Structural Fill, the material removed from the excavations shall be taken directly to the fill areas or, if required, stockpiled by material types. The stockpiles shall be approved by MANAGER. C. CONTRACTOR shall grade all excavations to ensure grades are maintained to provide adequate drainage at all times. Work shall be suspended by CONTRACTOR when, in the opinion of MANAGER and CERTIFYING ENGINEER, the site is overly wet, muddy, or otherwise unsuitable for proper maintenance, until directed otherwise by MANAGER, at no cost to CC &V. D. In excavations where Structural Fill or Select Structural Fill is to be placed on slopes steeper than 3H:1 V, horizontal benches shall be excavated into the slope to allow fill to be placed in horizontal lifts. The CONTRACTOR shall continuously bench and key embankment material into the existing material a minimum of 2 feet. P \Phase 5 OSA 2011 Cert Repor\Appendices\Appendix E Specifications \02200.r1 doc Page 6 of 18 September 3, 2008 Revision 1