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2016-01-14_REPORT - M1980244 (15)
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2016-01-14_REPORT - M1980244 (15)
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Last modified
8/24/2016 6:14:32 PM
Creation date
1/15/2016 2:27:31 PM
Metadata
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Template:
DRMS Permit Index
Permit No
M1980244
IBM Index Class Name
Report
Doc Date
1/14/2016
Doc Name
Final Report Quality Assurance Monitoring & Test Results
From
Cripple Creek & Victor Gold Mining Company
To
DRMS
Email Name
TC1
ERR
AME
WHE
Media Type
D
Archive
No
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Cripple Creek & Victor Gold Mining Company <br />Squaw Gulch VLF Phase 1 <br />(9,550-foot Elevation Bench to Geomembrane Panel P1635) <br />Final Report <br />Quality Assurance Monitoring & Test Results <br />January 2016 <br />Project No.: 74201125N0 Page 17 <br />Amec Foster Wheeler performed 12 CQA Atterberg limits of DCF. The testing frequency <br />(approximately one test per 19,734 cubic yards) exceeded the minimum specified <br />testing frequency of one test per 20,000 cubic yards. The DCF CQA Atterberg limits <br />results met the project technical specifications; the results are presented in <br />Appendix H.1 and summarized in Table 10. <br /> Proctor Compaction Tests <br />All SF for the Phase 1 VLF project contained more than 30 percent retained on the ¾- <br />inch sieve, no Proctor compaction tests were performed on the SF material. Per project <br />technical specification 2200 Section 3.06, Subsection B, SF containing more than 30 <br />percent retained on the ¾-inch sieve is placed using a method specification and cannot <br />be tested using a standard Proctor (due to the high rock content). <br />Amec Foster performed 34 CQA standard Proctor compaction tests of SLF in order to <br />compare in-place densities and moisture contents with laboratory derived values of <br />maximum dry density and optimum moisture content. The actual testing frequency <br />(approximately one test per 3,483 cubic yards) exceeded the minimum specified testing <br />frequency of one test per 4,000 cubic yards. The SLF CQA compaction test results met <br />the project technical specifications; the results are presented in Appendix H.2 and <br />summarized in Table 9. <br /> Permeability Tests <br />Amec Foster Wheeler performed 32 permeability tests of SLF. The actual testing <br />frequency (approximately one test per 3,700 cubic yards) exceeded the minimum <br />specified testing frequency of one test per 4,000 cubic yards. Two of the permeability <br />tests provided results that were not representative of the SLF materials used concluding <br />to human error during testing in the lab. There was insufficient material to perform <br />retesting on sampled material so two additional samples were taken and tested resulting <br />in 39 Gradations, Atterbergs, and Proctor tests and 37 permeability tests. The 37 <br />permeability tests meet the testing frequency requirements. Testing was performed with <br />a flexible-wall permeameter with back-pressure saturation and a constant rate of flow <br />(ASTM D5084, Method D). The SLF was re-compacted to the in-place density measured <br />during nuclear density testing and the corresponding moisture content (as determined <br />from oven-dried samples). The nuclear density value measured in the field was <br />corrected for coarse particles according to ASTM D4718. Laboratory tests yielded <br />coefficients of permeability for the CQA samples, all of which meet or exceed the <br />permeability specification of 1x10-6 cm/sec maximum. The SLF CQA permeability results <br />met the project technical specifications; the results are presented in Appendix H.3 and <br />summarized in Table 9.
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