Laserfiche WebLink
TECHNICAL SPECIFICATIONS <br />B. Select Structural Fill <br />Select Structural Fill shall be placed for miscellaneous site grading as required by the MANAGER <br />and CERTIFYING ENGINEER. <br />2. CONTRACTOR shall condition Select Structural Fill to a moisture content that allows compaction <br />to the required density and that results in a firm, unyielding surface capable of allowing the <br />movement of vehicles and equipment over the surface without causing rutting or other deleterious <br />effects. <br />3. CONTRACTOR shall place Select Structural Fill materials with less than 30 percent rock <br />materials above 3/4 -inch size in maximum 12 -inch loose lifts, and compacted to 95 percent of <br />maximum dry density (ASTM D698). Compaction shall occur in such manner as to prevent the <br />underlying Geomembrane from becoming damaged. <br />C. Drain Cover Fill <br />1. Drain Cover Fill shall be placed over the geomembrane in the locations shown on the DRAWINGS. <br />2. Prior to placing the Drain Cover Fill, CONTRACTOR shall verify by visual inspection that the <br />underlying geosynthetics are free of holes, tears, wrinkles, or foreign objects. MANAGER and <br />CERTIFYING ENGINEER will inspect the geosynthetic for wrinkles prior to placement of Drain <br />Cover Fill. As instructed by MANAGER, CONTRACTOR shall "work out" wrinkles to the <br />satisfaction of MANAGER and CERTIFYING ENGINEER prior to placement of the Drain <br />Cover Fill. In all cases, wrinkles shall not be of a size that they could fold back on themselves. <br />Wrinkles greater than one foot shall be removed and repaired by the INSTALLER. <br />CONTRACTOR shall place Drain Cover Fill in a single 24 -inch loose lift. The tracked equipment <br />shall operate only over previously placed Drain Cover Fill. CONTRACTOR shall not operate <br />equipment directly on geosynthetics. Only a dozer with a ground pressure not exceeding 8.7 psi <br />can be used to place Drain Cover Fill. A CAT 12G motor grader, or equivalent approved by <br />CERTIFYING ENGINEER, can be used for Drain Cover Fill final grading. Equipment used for <br />placement will not be allowed to pivot on one track (i.e., no abrupt or sharp turns). There shall be <br />no downhill placement on slopes steeper than 4H:IV. Material can be placed along contours if <br />buttressed from below. Motor graders shall not be allowed to make abrupt turns, brake suddenly, or <br />dig blade in which results in the tires spinning on the Drain Cover Fill surface. <br />Highway compatible Rubber tired construction equipment shall not be allowed to travel over the <br />geomembrane or on top of solution collection piping unless a thickness of at least 45 inches of <br />Drain Cover Fill has been placed over the geomembrane and on top of solution collection piping. <br />The CONTRACTOR will be required to demonstrate to the MANAGER, DESIGN ENGINEER <br />and CERTIFYING ENGINEER that the equipment and procedures used are not detrimental to the <br />geomembrane and piping, at no cost to CC &V. Off road haul truck traffic shall require a minimum <br />of 60 inches for Cat 773 (or equivalent) of Drain Cover Fill placed over the geomembrane and <br />solution collection piping, and a minimum of 120 inches for CAT 777 (or equivalent) of Drain <br />Cover Fill placed over the geomembrane and solution collection piping. <br />When placing Drain Cover Fill the maximum acceptable drop height is 3 feet. <br />CONTRACTOR shall operate equipment in a manner that is protective of underlying <br />geosynthetics. If MANAGER or CERTIFYING ENGINEER suspects the occurrence of any <br />damage to the underlying geosynthetics, MANAGER will instruct CONTRACTOR to remove <br />Drain Cover Fill to expose the geosynthetics. CONTRACTOR shall uncover, repair any observed <br />damage of the underlying geosynthetics, in accordance with the repair requirements of sections <br />02776.1 and 02776.2 of these SPECIFICATIONS, and recover, at no cost to CC &V. <br />CONTRACTOR shall provide close continuous monitoring at the point of placement during the <br />placement of the Drain Cover Fill over geosynthetics. <br />Earthworks September 24, 2013 <br />02200.0.1 -6 Revision 1 <br />S \Projects \1550 - CC &V Field Spt CQA PSES Bldg \8 0 Project Engineering and Design \8 2 Specificanons\PSES Pipe Rack Liner Extension SpecificatronsUndbvidual Specification <br />Sections \02200 0 RI Earthworks docx <br />