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amec <br /> foster <br /> wheeler <br /> Zephyr Gold USA Ltd. PAGE 8 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 /> TABLE 02776.0-2 <br /> TYPICAL 60 mil SINGLE-SIDED TEXTURED HDPE GEOMEMBRANE PROPERTIES <br /> Property Test Method Requirements <br /> Thickness (minimum average), mils 57 <br /> Lowest individual for 8 out of 10 values ASTM D5994 54 <br /> Lowest individual for any of the 10 values 51 <br /> Formulated Density (g/cm3) ASTM D1505/D792 0.940 <br /> Carbon Black Dispersion ASTM D5596 (See Note 1) <br /> Carbon Black Content (%) ASTM D4218 2.0—3.0 <br /> Asperity Height ASTM D7466 16 mil (min. ave.) <br /> Tensile Properties (each direction)2 <br /> Yield Strength, lb/in 126 (min. ave.) <br /> Yield Elongation, % ASTM D6693, Type 12% <br /> Break Strength, lb/in IV 90 (min. ave.) <br /> Break Elongation, % 100% (min. ave.) <br /> Puncture Resistance (lb) ASTM D4833 90 (min. ave.) <br /> Tear Resistance (lb) ASTM D1004 42 (min. ave.) <br /> Field Fusion Seam Properties3 <br /> Peel Strength (lb/in) ASTM D6392 91 <br /> Shear Strength (lb/in) 120 <br /> Field Extrusion Seam Properties3 <br /> Peel Strength (lb/in) ASTM D6392 78 <br /> Shear Strength(lb/in) 120 <br /> Notes: <br /> 1. Carbon Black dispersion(only applies to near spherical agglomerates)for 10 different views: <br /> a. 9 or 10 views shall be Category 1 or 2;and <br /> b. No more than 1 view from Category 3. <br /> 2. Machine direction(MD)and cross machine direction(XMD)average values should be on the basis of 5 test specimens <br /> each direction: <br /> a.Yield elongation is calculated using a gage length of 33 mm <br /> b. Break elongation is calculated using a gage length of 50 mm <br /> 3. Value listed for shear and peel strengths are for 4 out of 5 test specimens;the 6h specimen can be as low as 80%of <br /> the listed values. <br /> S:\ZEPHYR MINERALS\DRMS MINE APPLICATION\02776-GEOMEMBRANE.DOCX <br />