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amec <br /> foster <br /> wheeler <br /> Zephyr Gold USA Ltd. PAGE 12 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 /> shall then be patched with an oval or round patch of the same geomembrane extending a minimum of 6 in <br /> beyond the cut in all directions. <br /> Extend seaming to the outside edge of panels placed in the anchor trench. <br /> 4.5.2 FIELD TRIAL SEAMS <br /> Trial seams shall be conducted at the beginning of each seaming period and within thirty (30) minutes of <br /> commencement of seaming, at the CONSTRUCTION MANAGER'S discretion, and immediately following <br /> any Work stoppage (i.e., lunch, weather conditions, etc.) of thirty (30) minutes or more for each seaming <br /> apparatus used that day. Each Seamer shall make at least one trial seam each day. <br /> All trial seams shall be made at a location selected by the CQA MONITOR in the area of the seaming and <br /> in contact with the subgrade. The trial seam samples shall be 10 ft long for fusion seaming and 5 ft long <br /> for extrusion seaming,with the seam centered lengthwise. Specimens 1 in.wide shall be cut from opposite <br /> ends of the test seam by INSTALLER. INSTALLER shall use a tensiometer to test these specimens for <br /> shear and peel. Both inside and outside tracks of fusion welds will be tested for peel. For both fusion and <br /> extrusion welds, two (2) coupons will be tested for peel and one (1) coupon for shear. The tensiometer <br /> shall have a grip separation of 4 in plus the width of the seam. The seam is to be centered between the <br /> clamps. These tests shall not fail according to the criteria in Article 2.0. A break through the weld or at the <br /> weld/sheet interface shall be considered a failure in both shear and peel strength tests unless the weld <br /> strength exceeds the sheet strength, as discussed in Article 2.0. If a trial seam fails to meet field seam <br /> SPECIFICATIONS, the seaming apparatus and/or seamer shall not be accepted and shall not be used for <br /> seaming until the deficiencies are corrected and two consecutive successful full trial seams are achieved. <br /> CONTRACTOR shall mark the test weld with date, ambient temperature,welding machine number,welding <br /> technician identification, machine temperature and speed. For extrusion welding, CONTRACTOR shall <br /> record the nozzle and extrusion settings. <br /> CONTRACTOR shall cut remainder of successful trial seams into two pieces, one to be retained in <br /> OWNER'S archives and one to be retained by INSTALLER. <br /> 4.6 NONDESTRUCTIVE TESTING <br /> CONTRACTOR shall non-destructively test all field seams over their full length. All test equipment shall <br /> be furnished by CONTRACTOR. <br /> S:\ZEPHYR MINERALS\DRMS MINE APPLICATION\02776-GEOMEMBRANE.DOCX <br />