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amec <br /> foster <br /> wheeler <br /> Zephyr Gold USA Ltd. PAGE 16 OF 17 <br /> Dawson Gold Project SEC. NO.: <br /> Dawson Filtered Tailings Storage Facility SPECIFICATION 02776.0 <br /> Pre-feasibility Study <br /> TECHNICAL SPECIFICATIONS FOR DATE: (ORIGINAL) <br /> Fremont County, Colorado GEOMEMBRANE 20-October-16 <br /> PROJECT NO.: 74201633 REVISION: A <br /> DATE: 20-Oct-16 <br /> be repeated until the reseamed length is judged satisfactory by MANAGER and CONSTRUCTION <br /> MANAGER. <br /> • Samples taken as the result of failed tests do not count toward the total number of destructive tests <br /> required. <br /> INSTALLER shall document all actions taken in conjunction with destructive test failures, with <br /> CONSTRUCTION MANAGER providing Quality Assurance documentation. <br /> Cap strips shall be non-destructively tested as described in Article 4.6 of this Section. <br /> 4.8 DEFECTS AND REPAIRS <br /> All seams and non-seam areas of the geomembrane shall be observed by CQA MONITOR for defects, <br /> holes, blisters, undispersed raw materials, and any sign of contamination by foreign matter. The surface <br /> of the geomembrane shall be clean at the time of observation. The geomembrane surface shall be brushed, <br /> blown, or washed by INSTALLER if the amount of dust or mud inhibits inspection. MANAGER and <br /> CONSTRUCTION MANAGER shall determine if cleaning of the geomembrane is needed to facilitate <br /> observation at no additional cost to OWNER. <br /> Each suspect location in seam and non-seam areas shall be non-destructively tested as determined <br /> appropriate by CQA MONITOR, in the presence of CQA MONITOR. Each location that fails the non- <br /> destructive testing shall be marked by INSTALLER, and repaired accordingly. <br /> Defective seams shall be reconstructed as described in these SPECIFICATIONS. <br /> Small holes shall be repaired by abrading the sheet surface and welding an extrusion bead. If the hole is <br /> larger than one-quarter (1/4) inch in diameter, it shall be patched. Tears shall be repaired by patching. <br /> Where the tear is on a slope or an area of stress and has a sharp end, it must be rounded prior to patching. <br /> Blisters, large holes, undispersed raw materials, and contamination by foreign matter shall be repaired by <br /> patches. <br /> Surfaces of geomembrane that are to be patched shall be abraded and cleaned no more than fifteen (15) <br /> minutes prior to the repair. No more than ten (10) percent of the thickness shall be removed. <br /> Patches shall be round or oval in shape, and extend a minimum of 6 inches beyond the edge of defects. <br /> All patches shall be of the same compound and thickness as the geomembrane specified. All patches <br /> shall have their top edge beveled to an approximate 45 degree angle with an angle grinder prior to <br /> placement of the patch. Patches shall be applied using approved methods only. <br /> S:\ZEPHYR MINERALS\DRMS MINE APPLICATION\02776-GEOMEMBRANE.DOCX <br />