Laserfiche WebLink
Denison Mines (USA) Corp. <br />Van 4 Mine - Ore Storage Pad <br />1. The geomembrane liner shall be 30-mil PVC and shall meet the specified physical, <br />mechanical, and chemical property requirements listed in Table 1. <br />2.02 QUALITY CONTROL DOCUMENTATION - FACTORY FABRICATION <br />A. All completed factory seams are 100 percent inspected. Factory seams shall be visually <br />inspected for full seam continuity over their full length. Any areas that do not meet the specified <br />requirements shall be removed and repaired per section. <br />B. Destructive tests will be performed to verify that the seam strength requirements of the <br />specifications are met. Random samples shall be taken at a minimum of every 3,000 lineal feet <br />of factory seam or once per factory panel fabricated, whichever is more frequent, and the <br />following quality assurance tests will be performed on each sample. <br />1. Thickness <br />2. Bond seam strength (shear strength) <br />3. Peel adhesion <br />C. The sample shall be cut into ten one-inch specimens. Five peel and five bonded seam specimens <br />are removed. Five specimens shall be tested for bonded seam strength and five for peel <br />adhesion. To be acceptable, the average of five test specimens for peel and the average of five <br />test specimens for bonded seam strength must meet the minimum peak load requirements of <br />factory seams as follows: <br />• 1. Bonded Seam Strength: One-inch strips cut with the weld centrally located are tested by <br />stressing the weld in a "shear" configuration. That is, the top sheet is stressed in relation <br />to the bottom sheet in a direction away from the weld. A pass result occurs when the <br />specimen averages meet the minimum peak load requirements stated in the contract <br />(usually 80% of specified sheet strength). A failure occurs when the weld separates or the <br />material breaks at a peak load less than the minimum requirements. The test result to be <br />reported will be the average of the peak loads recorded for each of the five specimens. <br />Peel Adhesion: One-inch strips cut with the weld centrally located are tested by stressing <br />the top sheet in relation to the overlapped edge of the lower sheet in an effort to peel the <br />weld away. Each specimen will be peeled one inch along the seam length. A pass result <br />occurs when the specimen meets the minimum peak load requirements stated in the <br />contract. A failure occurs when the weld peels at a peak load less than the specification <br />without film tearing bond. The test result to be reported is the average of the peak loads <br />recorded for each of the four specimens. <br />D. Each test will be identified by panel serial number and the MANUFACTURER'S roll number. <br />These tests shall be performed in the fabricators laboratory. <br />E. Prior to installation of the geomembrane at the site, the fabricator will provide to the <br />ENGINEER, copies of MANUFACTURER material certifications and a copy of quality control <br />test results for all panels to be supplied, verifying conformance with this specification and the <br />requirements as represented in ASTM D 7176 specification. The location of any defects and <br />. repairs and all necessary retesting results will also be documented in the report. <br />JOB NO. 64986. 10.1 4