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

Cripple Creek & Victor Gold Mining Company December 10, 2003
' Mr. Ron Roberts -2- 003-2203
testing. Soil Liner Fill placement was performed in accordance with the Phase N VLF Construction
' Specifications. Results and locations of field density and depth verification testing aze presented in
Tables 7 and 8, respectively.
' Construction of the containment liner extension required exposing the original Phase I liner anchor
trench, and excavation of approximately 980 feet of new anchor trench along the southern edge.
Golder observed and documented the deployment, seaming, defect repair, and testing (Destructive
and Non-Destructive) of approximately 37,786 square feet of 100-mil single-sided textured and
100-mil smooth LLDPE geomembrane deployed by Poly-flex. The as-built geomembrane panel
layout is presented in Figure 2. Geomembrane was supplied and tested in accordance with the Phase
' N VLF Construction Specifications and was placed to complete the composite liner system. CQA
observation records and test results for the installation of geomembrane are presented in
Attachment B.
Golder visually monitored the placement of approximately 2,800 cubic yards of DCF over the
geomembrane adjacent to the ADR and the lab. DCF was not placed west of the lab area, Golder
observed that DCF was placed to maintain a thickness of 2 to 3 feet of DCF in the traffic azea next to
' the ADR.
Other information required by the Phase N VLF Construction Specifications for the placement of
SLF and geomembrane, including soil surface acceptance certification, geomembrane certification
summazies, equipment calibration certificates, and resumes of Poly-flex personnel, are presented in
Attachment C.
The containment liner extension was constructed in accordance and met with the Phase N VLF
- Construction Specifications, with the following modifications:
• The minimum constructed liner overlap between the existing VLF liner and the
containment liner extension was 1 foot. This was considered acceptable because
this seam will not be subjected to high ore loads and ore leaching will not occur in
this area; and
• A maximum slope of 2 horizontal (I-I):1 vertical (V) was used in some areas of the
I containment liner extension azea to facilitate construction in a limited space. This
slope was deemed acceptable since ore will not be stacked against the extension
slopes.
' Golder appreciates the ongoing opportunity to provide engineering and CQA services for the Cresson
Project, Please contact the undersigned with any questions.
Sincerely,
GOLDER ASSOCIATES INC.
John F. Lupo, Ph.D., P.E. tmberl ke Morrison, P.E., R.G.
Senior Project Manager roject Engineer
' 1:\W\2303W4W\CQA-ADft1103\00322030900.09142Rep.doc Golder Associates