2011-10-06_REVISION - M1980244 (3)

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Section 02200 Earthworks S:\Projects \1125G Squaw Gulch Valley Leach Facililty Design \I - Tech Specs \02200.r0.doc ame no abrupt or sharp turns). There shall be no downhill placement on slopes steeper than 4H:1V. Material can be placed along contours if buttressed from below. Motor graders shall not be allowed to make abrupt turns, brake suddenly, or dig blade in which results in the tires spinning on the Drain Cover Fill surface. 4. Highway compatible Rubber tired construction equipment shall not be allowed to travel over the geomembrane or on top of Solution Collection piping unless a thickness of at least 45 inches of Drain Cover Fill has been placed over the geomembrane and on top of Solution Collection piping. The CONTRACTOR will be required to demonstrate to the MANAGER, DESIGN ENGINEER and CERTIFYING ENGINEER that the equipment and procedures used are not detrimental to the geomembrane and piping, at no cost to CC &V. Off road haul truck traffic shall require a minimum of 60 inches for Cat 773 (or equivalent) of Drain Cover Fill placed over the geomembrane and solution collection piping, and a minimum of 120 inches for CAT 777 (or equivalent) of Drain Cover Fill placed over the geomembrane and solution collection piping. 5. When placing Drain Cover Fill the maximum acceptable drop height is 3 feet. 6. CONTRACTOR shall operate equipment in a manner that is protective of underlying geosynthetics. If MANAGER or CERTIFYING ENGINEER suspects the occurrence of any damage to the underlying geosynthetics, MANAGER will instruct CONTRACTOR to remove Drain Cover Fill to expose the geosynthetics. CONTRACTOR shall uncover, repair any observed damage of the underlying geosynthetics, in accordance with the repair requirements of Sections 02776.0 and 02777.0 of these SPECIFICATIONS, and recover, at no cost to CC &V. 7. CONTRACTOR shall place Drain Cover Fill at a rate such that the geomembrane liner is not exposed to ultraviolet light for more than 180 days. 8. CONTRACTOR shall provide close continuous monitoring at the point of placement during the placement of the Drain Cover Fill over geosynthetics. 9. CONTRACTOR shall verify the final thickness of Drain Cover Fill to determine compliance with this SPECIFICATION. CONTRACTOR shall record verification location, elevation, and thickness. CQA Monitor shall witness all verification measurements. CONTRACTOR will submit a method of verifying Drain Cover Fill depth to MANAGER for approval. Grade markers shall be placed on a 50 -by -50 -foot grid with additional points required for breaks in grade. CONTRACTOR shall remove all grade markers under supervision of CQA Monitor after verification measurements have been approved by MANAGER and CERTIFYING ENGINEER and will backfill holes with Drain Cover Fill. Areas with deficient thickness shall be reworked by CONTRACTOR, until acceptable measurements are obtained. If MANAGER or CERTIFYING ENGINEER suspects the occurrence of any damage to the underlying geosynthetics, MANAGER will instruct CONTRACTOR to remove Drain Cover Fill to expose the geosynthetics. CONTRACTOR shall uncover, repair any observed damage of the underlying geosynthetics, in accordance with the repair requirements of Sections 02776.0 and 02777.0 of these SPECIFICATIONS and recover, at no cost to CC &V. 10. CONTRACTOR will provide adequate illumination as approved by MANAGER, if Drain Cover Fill placement is carried out at night. A minimum of 2 -foot candles measured at the synthetic liner shall be used when Drain Cover Fill placement is carried out at night. Page 16 of 18 January 14, 2011 Revision 0