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amec <br /> foster <br /> wheeler <br /> Zephyr Gold USA Ltd. PAGE 11 OF 11 <br /> Dawson Gold Project <br /> Dawson Filtered Tailings Storage Facility SPECIFICATION SEC. NO.: <br /> 01400.1 <br /> Pre-feasibility Study TECHNICAL SPECIFICATIONS FOR EARTHWORKS DATE: (ORIGINAL) <br /> Fremont County, Colorado CONSTRUCTION QUALITY ASSURANCE(CQA) 20-October-16 <br /> PROJECT NO.: 74201633 PLAN REVISION: A <br /> DATE: 20-Oct-16 <br /> TABLE 01400.1-1 <br /> MINIMUM EARTHWORKS TESTING FREQUENCY' VOLUME PER TEST <br /> Filtered Geomembrane Filter Material, <br /> Test and ASTM Rockfill Structural Fill Cushion Drain Gravel, <br /> Tailings 3 3 <br /> Designation (yd ) (yd ) Material Riprap <br /> (Yd3) (Yd) (Yd3) <br /> Proctor <br /> Compaction Note 4 Note 4 1,000 1,000 Note 4 <br /> ASTM D698 <br /> Particle Size <br /> (ASTM C117, 5,000 Note 4 300 300 500 <br /> C136, D422, <br /> D1140) <br /> Atterberg Limits 5,000 Note 4 300 300 - <br /> (ASTM D4318) <br /> Moisture <br /> Content3 Note 4 Note 4 300 500 Note 4 <br /> (ASTM 2216) <br /> In-place <br /> Density3 Note 4 Note 4 300 500 Note 4 <br /> (ASTM D6938) <br /> Notes: <br /> 1. Tests shall be performed at the specified frequency or one per material type,whichever is greater. <br /> 2. Use the Unified Soil Classification System (USCS)for description and identification(ASTM D2488). <br /> 3. In-place moisture content and in-place density. <br /> 4.Will be placed in accordance with an approved method SPECIFICATION. A trial compaction program will be conducted for <br /> tailings placement at start-up of operations. <br /> S:\ZEPHYR MINERALS\DRMS MINE APPLICATION\01400.1-EARTHWORKS CQA.DOCX <br />