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2016-10-21_REPORT - M1980244 (31)
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2016-10-21_REPORT - M1980244 (31)
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Last modified
1/9/2017 10:52:55 AM
Creation date
12/22/2016 8:15:33 AM
Metadata
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Template:
DRMS Permit Index
Permit No
M1980244
IBM Index Class Name
Report
Doc Date
10/21/2016
Doc Name
SGVLF Phase I Cert Report - 0 Completion Report
From
CC&V
To
DRMS
Type & Sequence
TR87
Email Name
TC1
AME
ERR
Media Type
D
Archive
No
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Cripple Creek & Victor Gold Mining Company <br />Squaw Gulch VLF Phase 1 Completion <br />Record of Construction Report <br />475.0106.006 <br />October 14, 2016 <br /> <br />P:\Projects\0106.006 CC&V CQA and EDS\J‐REPORTS\ROC Report\475.0106.006 CCV PHASE 1 ROC REPORT ‐ FINAL161014.DOCX <br /> Page 14 <br />3.4.3. Geomembrane Fusion Seaming <br />Double‐wedge fusion welding was the primary method of geomembrane seaming for <br />the Squaw Gulch VLF Phase 1 Completion. Prior to fusion welding activities, trial welds <br />were performed for each welding machine and welding technician combination for each <br />type of geomembrane. The fusion welding trial seam logs are presented in Appendix <br />J.2.1. The weld was inspected constantly for insufficient overlap, burnouts, or any other <br />damage caused during the welding process. The CQA Monitor logged the welding <br />machine and welding technician combination, the length of the seam, the direction the <br />seam was welded, time of seaming, the welding machine temperature, and the welding <br />machine speed. Destructive test samples were marked during fusion seaming and <br />testing is discussed further in Section 3.4.5. Continuity conformance of the seam is also <br />performed using pressure tested methods and is discussed further in Section 3.4.6. The <br />Geomembrane Fusion Welding Summary is presented in Appendix J.3. <br />3.4.4. Geomembrane Extrusion Seaming <br />At each construction bench, the deployed geomembrane was tied‐into the previously <br />placed geomembrane, overlapping a minimum of two feet. The tie‐in was welded using <br />extrusion welding methods. Prior to extrusion seaming activities, trial welds were <br />performed for each welding machine and welding technician combination for each type <br />of geomembrane. The trial seam logs are presented in Appendix J.2.2. As extrusion <br />seaming was performed proper techniques were verified, including welding angle, <br />grinding, and weld/welding rod cleanliness. The CQA Monitor logged the welding <br />machine and welding technician combination, the length of the seam, the direction the <br />seam was welded, time of seaming, the pre‐heat temperature, and the welding <br />temperature. Destructive test samples were marked during extrusion seaming and <br />testing is discussed further in Section 3.4.5. All extrusion welded seams were vacuum <br />tested and is discussed further in Section 3.4.7. The Geomembrane Extrusion Welding <br />Summary is presented in Appendix J.4. <br />3.4.5. Geomembrane Destructive Testing <br />During welding activities destructive test samples were marked for every 500 linear feet <br />of seam for each welding type and each welding machine/welding technician <br />combination. A 24‐inch long by 12‐inch wide sample was cut from the seam centered on <br />the seam lengthwise. The sample was then cut in two halves. One half was archived by <br />the CQA Monitor to be tested later, if necessary. Ten 1‐inch coupons were then cut from <br />the remaining sample half. Five coupons were tested for shear strength and five <br />coupons were tested for peel strength using a tensiometer. The different failure types <br />and test codes for fusion and extrusion destructive testing are presented on Figures 3
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