2012-08-24_REPORT - M1980244 ‎(16)‎

• Permit No: M1980244
• IBM Index Class Name: REPORT
• Doc Date: 8/24/2012
• Doc Name: CQA REPORT, JANUARY 2012
• From: CC&V
• To: DRMS
• Type & Sequence: AM10
• Email Name: TC1
• Media Type: D
• Archive: No

ameO
B) Drilling
Confirmatory drilling was finished at Underground Working #4000. A drill pattern was set out by
an AMEC field representative. Forty three holes were drilled encountering fourteen voids. An
approximate total of 2,150 lineal feet was drilled. As -built survey of the drill holes was performed
by Ames.
Confirmatory drilling was performed at Underground Working #4006. A drill pattern was set out by
an AMEC field representative. Ten holes were drilled encountering one void. An approximate total
of 500 lineal feet was drilled. As -built survey of the drill holes was performed by Ames.
Q Remediation
Underground Working #4004 was investigated using a CAT 330 excavator and observation was
performed by an AMEC field representative. The previously logged location was staked by the
Ames surveyor. Excavation of the area was performed and it was found to be a shallow surface
working. The native material below the surface depression was found to be consistent and no
signs of a significant working were found. The working was backfilled with structural fill in 18" to
24" lifts using various CAT dozers. Each lift was moisture conditioned using a tandem axle water
truck (when necessary) and compacted using a 10 -ton vibratory smooth drum compactor, passing
over the entire fill surface at least 4 times (method compaction technique was applicable).
Underground Working #4009 was investigated using a CAT 330 excavator and observation was
performed by an AMEC field representative. The previously logged location was staked by the
Ames surveyor. Excavation of the area was performed and it was found to be a shallow surface
working. The native material below the surface depression was found to be consistent and no
signs of a significant working were found. The working was backfilled with structural fill in 18" to
24" lifts using various CAT dozers. Each lift was moisture conditioned using a tandem axle water
truck (when necessary) and compacted using a 10 -ton vibratory smooth drum compactor, passing
over the entire fill surface at least 4 times (method compaction technique was applicable).
Underground Working #4010 was investigated using a CAT 330 excavator and observation was
performed by an AMEC field representative. The previously logged location was staked by the
Ames surveyor. Excavation of the area was performed and it was found to be a shallow surface
working. The native material below the surface depression was found to be consistent and no
signs of a significant working were found. Backfilling of the working will be performed at a later
date. The area was bermed off for safety.
Underground Working #4011 was investigated using a CAT 330 excavator and observation was
performed by an AMEC field representative. The previously logged location was staked by the
Ames surveyor. Excavation of the area was performed and it was found to be a shallow surface
working. The native material below the surface depression was found to be consistent and no
signs of a significant working were found. Backfilling of the working will be performed at a later
date. The area was bermed off for safety.
Underground Working #4012 was investigated using a CAT 330 excavator and observation was
performed by an AMEC field representative. The previously logged location was staked by the
Ames surveyor. Excavation of the area was performed and it was found to be a shallow surface
working. The native material below the surface depression was found to be consistent and no
signs of a significant working were found. Backfilling of the working will be performed at a later
date. The area was bermed off for safety.
MEW Weekly Report WE 01.07.2012