2009-12-21_REVISION - M1980244 ‎(30)‎

• Permit No: M1980244
• IBM Index Class Name: REVISION
• Doc Date: 12/21/2009
• Doc Name: QA Liner Recert- App. E, Technical Specifications
• From: CC&V
• To: DRMS
• Type & Sequence: AM9
• Media Type: D
• Archive: No

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H. Drain Cover Fill
1. Drain Cover Fill shall be placed over the geomembrane in the locations shown on the
DRAWINGS.
2. Prior to placing the Drain Cover Fill, CONTRACTOR shall verify by visual inspection that
the underlying geosynthetics are free of holes, tears, wrinkles, or foreign objects.
MANAGER and CERTIFYING ENGINEER will inspect the geosynthetic for wrinkles
prior to placement of Drain Cover Fill. As instructed by MANAGER, CONTRACTOR
shall "work out" wrinkles to the satisfaction of MANAGER and CERTIFYING
ENGINEER prior to placement of the Drain Cover 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.
CONTRACTOR shall place Drain Cover Fill in a single 24 -inch loose lift. The tracked
equipment shall operate only over previously placed Drain Cover Fill. CONTRACTOR
shall not operate equipment directly on geosynthetics. Only a dozer with a ground pressure
not exceeding 8.7 psi can be used to place Drain Cover Fill. A CAT 12G motor grader, or
equivalent approved by CERTIFYING ENGINEER, can be used for Drain Cover Fill final
grading. 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: IV.
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.
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.
Section 02200 Page 15 of 18 September 3, 2008
Earthworks Revision 1
SAProjects \1125E CCV CQA \I - Tech Specs \02200.rt.doc