2011-11-19_REPORT - M1980244 ‎(5)‎

• Permit No: M1980244
• IBM Index Class Name: Report
• Doc Date: 11/19/2011
• Doc Name: FINAL REPORT, VOLUME 3 OF 3 2011 phase 5 valley leach facility ore storage 1 OF 2
• From: CC&V
• To: DRMS
• Media Type: D
• Archive: No

amec
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.
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
measurements have been approved by MANAGER and CERTIFYING ENGINEER and
will backfill holes with Low Volume Solution Collection 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 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.
12. CONTRACTOR will provide adequate illumination as approved by MANAGER, if Low
Volume Solution Collection Fill placement is carried out at night. A minimum of 2 -foot
candles measured at the synthetic liner, shall be used when Low Volume Solution Collection
Fill placement is carried out at night.
G. Soil Liner Fill
Soil Liner Fill shall be placed within the limits of the valley leach facility as shown on the
DRAWINGS and shall begin only after completion of all, or MANAGER and
CERTIFYING ENGINEER approved portion of, excavation and Structural Fill placement
in the valley leach facility.
Section 02200 Page 12 of 18 September 3, 2008
Earthworks Revision 1
PAPhase 5 OSA 2011 Cert Report\Appendices\Appendix E Spedficationsk02200.rl.doc