2014-08-07_REPORT - M1980244

• Permit No: M1980244
• IBM Index Class Name: REPORT
• Doc Date: 8/7/2014
• Doc Name: Weekly CQA Report: Week ending 07/26/14.
• From: CC&V
• To: DRMS
• Email Name: TC1
• Media Type: D
• Archive: No

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Tertiary Underdrain: Complete within the PSSA footprint.
B) Underground Workings
Confirmatory drilling continues at the Anaconda Mine Complex. Additional confirmatory drilling
and remediation is required.
Approximately 200 cubic yards of cemented rock fill was placed in underg ound working#6318.
The working was then partially backfilled with structural fill per project technical specifications.
Additional remediation is required.
C) Geomembrane:
PSSA
Geomembrane installation continued within the PSSA and included: deployment, seaming, repair;
and QAIQC activities. Geomembrane installation was performed on the PSSA floor. PSSA east
slope, and PSSA west slope. Approximately 73,509 square feet of 100 m:I LLDPE geomembrane
was deployed (panels S-220 throughS-239). Subgrade was inspected and approved by AMEC,
Ames and ECA representatives prior to geomembrane deployment. Approximately 3,941 linear
feet of seam was fusion welded during deployment using one or two fusion welding machines for
each day of deployment. Destructive and non-destructive testing was completed per project
technical specifications (Destructs 92 through 101).
Secondary liner panels S-186 through S-192, S-205 through S-219, and 5-224 through S-233,
(secondary 100mil LLDPE—204,213 ft2)were accepted and approved for low volume placement
by AMEC, Ames, and ECA representatives during this reporting period. Additional repairs may
be required prior to placement of low volume solution collection fill (ie. wrinkle removal, sub-liner
rock repair).
Anchor trench was excavated to approximately station A13+00 on the east side of the PSSA and
to station 612+00 on the west. Anchor trench backfilling occurred immediately after liner
deployment.
D) Overliner:
• PSSA
Cat 740 trucks hauled low volume solution collection fill (LVSCF)to the PSSA. Haul roads for the
trucks were maintained at least 4 feet above secondary geomembrane.
Ames continued placing low volume solution collection fill (LVSCF) on approved secondary liner
in minimum 3-foot lifts with Cat GPS D6 and D8 wide pad dozers between panels S12 to S171
S17 to S39, S45 to S59, S65 to S67, S88 to S89, S132 to S145, S152 to 5156, S-164 to S165.
S191 to 193, S195, S220 to S229, and S205 to S219.
See the attached LVSCF map for all placement locations.
Low volume material was removed and 4-inch-perforated pipe was installed on the liner near
panel S201 using a Cat 312E excavator and two laborers.
II) Storm Water Management
Best Management Practices(BMPs)are being performed.
CQA ACTIVITIES:
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