2014-08-19_REPORT - M1980244

• Permit No: M1980244
• IBM Index Class Name: REPORT
• Doc Date: 8/19/2014
• Doc Name: Weekly CQA Report: Week ending 08/09/14.
• From: CC&V
• To: DRMS
• Email Name: TC1
• Media Type: D
• Archive: No

ameO
Confirmatory drilling was completed at working UG#6551. Additional remediation is required.
Previously drilled confirmatory boreholes were grouted at the Anaconda Mine Complex.
Additional remediation is required.
Working#6543, found to be a shaft, was excavated to approximately 30 feet. The shaft was
backfilled for confirmatory drilling access and drilled. The confirmatory borings were grouted.
Additional remediation is required.
Underground workings, UG#U6532, UG#U6533, UG#U6534, UG#6541, and UG#6580 were
excavated to competent rock, backfilled per project specifications, and are considered
remediated.
Ames started excavating underground working UG#6588. Further remediation is required.
Workings UG#6581 and#6582 were excavated to equipment refusal into hard rock. Drilling
access will be provided and additional remediation is required.
C) Geomembrane:
PSSA
Geomembrane installation continued within the PSSA and included: deployment, seaming, repair,
and QA/QC activities. Approximately 42,086 square feet of 100-mil LLDPE SSMS (secondary)
geomembrane liner was deployed (panels S-248 through S-263). Subgrade was inspected and
approved by AMEC, Ames, and ECA representatives prior to geomembrane deployment.
Approximately 2,089 linear feet of seam was fusion welded during deployment using two fusion
welding machines. Destructive and non-destructive testing was completed per project technical
specifications (Destructs 106 through 107).
Due to weather conditions throughout the week, no additional liner was approved for low volume
placement.
Anchor trench was excavated to approximately station A17+00 on the east side of the PSSA and
to station B12+00 on the west. Anchor trench backfilling occurred immediately after liner
deployment and non-destructive testing was completed.
Large rocks were removed from the anchor trench on the PSSA embankment along the 9,450'
elevation trench using a mini excavator and/or a Cat excavator with a hammer attachment.
D) Overliner:
PSSA
Low volume material was placed up the slope near the LVSCS riser trench for subsequent 18-
inch HDPE pipe installation. Three 400-feet long, 18-inch HDPE pipe sections were placed in the
LVSCS riser trench.
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 S80 to S85;
S90 to S102; S118 to S129; S133 to S141; S146 to S148; S187; S207 to S208; and S211 to
S214.
See the attached LVSCF map for all placement locations.
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