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Kvaerner Metals Project No. 306900 <br />General Specification No. GC-01 <br />Site Work <br />1 . Excavation of hard, cemented or rocky soils requiring ripping by D9L, single <br />shank, dozer in low gear will be classified as Rippable Excavation. <br />Excavation shall not be made below grade shown on the drawings, except where <br />removal of non-suitable material necessitates over-excavation. Material removed <br />below grade shall be replaced with approved material thoroughly compacted as <br />specified in Section 5.2, or Section 5.3, as directed by the Engineer. <br />Spring or seepage water encountered shall be reported to the Engineer. If the <br />drawings do not indicate drainage facilities, provisions for the permanent <br />drainage of such water shall be made as directed by the Engineer. <br />The sequence of all excavation operations shall be such as to ensure the most <br />efficient utilization of excavated materials in embankments and fills. <br />Side slopes of cuts in alluvial soils or in residual soils shall not be steeper than <br />1 two horizontal to one vertical. Side slopes of cuts in weathered rock shall <br />conform within limits shown on the drawings or shall not be steeper than one <br />horizontal to one vertical. <br />Excess excavated material, or materials not suited for use in embankments and <br />fills, shall be disposed of in spoil areas shown on the drawings or approved by <br />the Engineer. <br />5.2 General Embankment and Fills <br />Areas to be filled including berms around ponds shall be cleared, grubbed and <br />stripped to competent natural soil. Prior to the placement of any fill, the subgrade <br />shall be wetted as necessary and compacted to the same requirements as the <br />overlying fill. Where thickness of fill is less than one foot, the surface shall be <br />scarified and re-compacted. <br />Embankments and fills shall not be started until the area has been inspected and <br />approved by the Engineer. <br />All embankments and fills shall be keyed into the existing hillsides by cutting <br />horizontal benches before placing and compacting the fill materials. Side slopes <br />of fill shall not be steeper than two horizontal to one vertical, unless shown <br />otherwise on the drawings. <br />Embankment and fill material shall be obtained from excavation of natural soil <br />within the plant site or approved borrow sources. Embankment and fill material <br />shall be reasonably well graded from 6 in. to fines, with no material larger than 3 <br />in. in maximum dimension in the upper one foot. Fill material shall have a <br />maximum percentage of fines (minus #200 sieve) of 35 percent by weight, a <br />liquid limit of less than 35 and a plasticity index of less than 20. Frozen material <br />shall not be used. Material shall not be placed on frozen ground. <br />'0 <br />If the on site soil materials obtained from excavation of natural soil within the <br />I plant site is used as fill material, it shall be placed in uniform lifts of about 6 inches <br />J:110691WP1,SPECLSiRIlC71OO01SPC.DOC, Rav. ~1~ CJ PmbC JuN 27, 1999 <br />