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Kvaerner Metals Project No. 306900 <br />General Specification No. GC-01 <br />Site Work <br />in compacted thickness, moisture conditioned to about 2 to 4 percent over <br />optimum moisture content and compacted to at least 95 percent maximum <br />density, as determined by ASTM D 1557. <br />Compaction shall be done with heavy rubber-tired rollers, sheepsfoot rollers or as <br />approved by the Engineer. Places inaccessible to rollers shall be compacted with <br />mechanical or hand tampers. <br />Each layer shall be free of ruts and shall meet compaction requirements before <br />each.5ucceeding layer is placed. Layers shall be maintained with a crown or <br />slope to provide drainage and prevent erosion. <br />A minimum of one field density test shall be performed, in accordance with ASTM <br />' D 2922 for each layer or 300 cubic yards of compacted material, whichever is <br />smaller. Additional tests may be required, when approved by the Engineer. All <br />tests shall be performed by an independent testing agency. <br />r <br />The liner bedding material, placed under the bottom layer of HDPE, shall consist <br />of fine grained soils, which are well graded and contain minimal amounts of <br />' granular components and organic substances. On-site screened material may be <br />used as liner bedding mat rial. ~ I ~ ~,., err/~'~j <br />10% uP~~~~ ~ ~ (Jbn{ D ~' '' <br />1 Material sh I consist of clays, silty clays or clayey silts, sands, and gravel. Not <br />less than percent by weight shall pass No. 200 sieve and no more than 30 <br />percent by weight shall be retained on No. 4 sieve, with maximum particle size of <br />2 inch. Material containing some oversize granular particles may be used, with <br />the engineer's approval, provided such materials meet the specifications noted <br />above for the No. 200 sieve and No. 4 sieve. The surface on which the material <br />will be placed may need to be scarified, wetted and compacted as directed by the <br />Engineer. <br />,~ Material shall be spread and moisture conditioned, if necessary, by sprinkling and <br />disk harrowing until a uniform distribution of moisture is obtained. Material shall <br />then be compacted to 65 percent maximum dry density, at or near the optimum <br />moisture content, as determined by ASTM D1557. Compacted material shall be a <br />minimum of 6 inch in thickness. <br />1 The finished surface shall be rolled with a steel drum roller to bed gravel particles <br />into the soil matrix. Particles not bedded during the rolling process shall be <br />removed by raking, brooming or hand picking the surface. This procedure shall <br />' be implemented shortly before deployment of liner. <br />5.3 Structural Fills <br />' Where buildings or facilities are to be constructed, fill material shall consist of <br />free-draining, well graded granular and non-expansive soils having a maximum <br />' particle size of 4 inches and a maximum percentage of fines (minus #200 sieve) <br />of 20 percent by weight. The fill material shall have a liquid limit of less than 25 <br />and a plasticity index of less than 10. <br />' J:19099~VJP15PEG15TAUGi10001SPC.OOC, Rev. ~1~ 6 • RiLL~tl JWy Z7, 1999 <br />