2009-07-07_REPORT - M1980244 ‎(6)‎

• Permit No: M1980244
• IBM Index Class Name: Report
• Doc Date: 7/7/2009
• Doc Name: QA July 7,2009: Load out Bin Relpcation Doc 1 of 7
• From: CC&V
• To: DRMS
• Media Type: D
• Archive: No

Cripple Creek & Victor Gold Mining Company
Cresson Project
Quality Assurance Monitoring and Test Results
Load Out Bin Relocation
July 7, 2009
ameO
one test per 207 cubic yards exceeded the minimum specified testing frequency of one test per
500 cubic yards. Nuclear density tests performed for the LOB SLF are summarized in Table 8.
Holes made in the SLF during testing were filled by tamping fine SLF material into the holes.
4.2.4.3 Depth Verification
Ames drilled a total of 2 holes in the compacted SLF to verify that the minimum 12 -inch
compacted depth had been achieved. AMEC monitored the SLF depth verification tests and
documented results. Depth verification holes were filled with bentonite chips and water. Both of
the holes drilled into the SLF had compacted depths of 12 inches. The testing frequency met the
minimum specified testing frequency of two measurements per acre. The Soil Liner depth
verification results are presented in Table 9.
4.2.5 Drain Cover Fill
AMEC provided visual monitoring of DCF placement. One AMEC monitor and at least two
Ames laborers were present monitoring each dozer, unless two dozers were within
approximately 50 feet of each other during DCF placement. AMEC verified that wrinkles in the
geomembrane did not fold over, that PVC grade markers were placed on a maximum 50 -foot by
50 -foot grid and at grade breaks, and that unsuitable material was not present in the fill. AMEC
continuously inspected geomembrane during DCF placement, and marked areas for repair, if
required. If needed, any repairs were documented and AMEC verified the repairs were
completed. After final grading, AMEC monitored removal of PVC grade markers.
4.2.6 Temperature Monitoring
AMEC monitored ambient air temperatures using a digital thermometer. Temperatures were
monitored throughout the day. The lowest and highest daily temperatures are summarized in
Table 2.
During placement of SF, when the ambient air temperature was less than 32 °F for longer than
1 hour in the previous 24 hours, AMEC was required to monitor the fill temperatures at depths of
3 inches and 6 inches, at a frequency of 6 tests per acre, and calculate the average fill
temperature from the lower temperature of the 3 -inch and 6 -inch tests.
SAPROJECTS \1125E CCV CQA \H3 - CONSTRUCTION \LOB CERT REPORT\REPORT BODY\LOB CERT REPORT 2009.07.01.DOC 14