2003-12-26_REVISION - M1980244 ‎(2)‎

• Permit No: M1980244
• IBM Index Class Name: Revision
• Doc Date: 12/26/2003
• Doc Name: Cert Report ARD Area
• From: CC&V
• To: DMG
• Type & Sequence: AM8
• Media Type: D
• Archive: No

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Golder Associates Inc. /1 ~ ~~N
44 Union Boulevard, Sulte 300 ~)lda.l
' Lakewood. CO USA 80228
Telephone [phone]
Fax [phone]
www.goldeccom '
December 10, 2003 Our Ref: 003-2203
' Cripple Creek & Victor Gold Mining Company
1280 State Highway 67
Victor, Colorado 80860
Attention: Mr. Ron Roberts
RE: 2003 CONTAINMENT LINER EXTENSION, CONSTRUCTION QUALITY
ASSURANCE (CQA) MONITORING
Dear Ron:
Golder Associates Inc (Golder) has prepared this report for the Cripple Creek & V ictor Gold Mining
Company (CC&V) presenting the Construction Quality Assurance (CQA) observations and data
completed for the containment liner extension neaz the ADR facility.
The containment liner extension encompasses an area of approximately 32,000 square feet (based on
grading plan) along the southern boundary of the Phase I Valley Leach Facility (VLF). This area was
t graded and lined to provide hydraulic containment for the ADR facility.
Description of Activities
Construction activities were performed by Ames Construction Ina (Ames) and Poly-flex
Construction Inc. (Poly-flex) during the period of August 18, 2003 through October 24, 2003. Golder
observed and documented the construction activities including subgrade preparation, placement of
Structural Fill (SF), Soil Liner Fill (SLF) placement, Pipe Bedding Material (PBM) placement,
anchor trench excavation, geomembrane deployment, and Drain Cover Fill (DCF) placement.
As part of the containment liner extension, a Phase I leak detection sump (LDSl) was relocated and
the leak detection trench was extended approximately 290 feet to the west-southwest. Figure 1
illustrates the final top of liner grading within the containment liner extension area, and includes the
' new location of the LDSI.
Golder conducted laboratory testing as required by the Phase N VLF Construction Specifications for
DCF, SF, PBM, and SLF. Tables 1 and 2 present a summary of the Technical Specifications and testing
frequency. The laboratory test results are summarized in Tables 3 through 6 and presented in
Attachment A. Attachment B presents geomembrane observations and test results (including ambient
temperatures). Attachment C presents subgrade acceptance forms, geomembrane and resin certifications,
equipment calibrations, Golder staff schedule, and Poly-Flex resumes.
Field material testing was conducted by Golder on SLF placed in the ADR area. The field testing of
approximately 1,400 cubic yards of SLF included monitoring of placement and preparation for
geomembrane deployment, testing in-place moisture and density, and performing depth verification
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