2011-10-06_REVISION - M1980244 (3)

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Section 02200 Earthworks ame geosynthetic for wrinkles prior to placement of Low Volume Solution Collection Fill. As instructed by MANAGER, CONTRACTOR shall "work out" wrinkles to the satisfaction of MANAGER and CERTIFYING ENGINEER prior to placement of the Low Volume Solution Collection Fill. In all cases, wrinkles shall not be of a size that they could fold back on themselves. Wrinkles greater than one foot shall be removed and repaired by the INSTALLER. 5. CONTRACTOR shall place Low Volume Solution Collection Fill in a single 36 -inch loose lift. The tracked equipment shall operate only over previously placed Low Volume Solution Collection Fill. CONTRACTOR shall not operate equipment directly on geosynthetics. Only a dozer with a ground pressure not exceeding 14.7 psi can be used to place Low Volume Solution Collection Fill. Equipment used for placement will not be allowed to pivot on one track (i.e., no abrupt or sharp turns). There shall be no downhill placement on slopes steeper than 4H:1 V. Material can be placed along contours if buttressed from below. 6. 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 Low Volume Solution Collection 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 Low Volume Solution Collection Fill placed over the geomembrane and solution collection piping, and a minimum of 120 inches for CAT 777 (or equivalent) of Low Volume Solution Collection Fill placed over the geomembrane and solution collection piping. 7. When placing Low Volume Solution Collection Fill the maximum acceptable drop height is 3 feet. 8. 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 Low Volume Solution Collection 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. 9. CONTRACTOR shall place Low Volume Solution Collection Fill at a rate such that no single area of 350,000 square feet of geomembrane liner is exposed to ultraviolet light for more than 180 days. 10. CONTRACTOR shall provide close continuous monitoring at the point of placement during the placement of the Low Volume Solution Collection Fill over geosynthetics. 11. CONTRACTOR shall verify the final thickness of Low Volume Solution Collection 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 Low Volume Solution Collection 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 S:\Projects \1125G Squaw Gulch Valley Leach Facililty Design \I - Tech Specs \02200.r0.doc Page 12 of 18 January 14, 2011 Revision 0