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Mr. Tim Cazier, DRMS <br />Page 4 <br />PSES Temporary Structure <br />As previously discussed, a temporary structure, approximately 40' x 100', will be also erected on <br />the bench above the AGVLF Phase 2 Pregnant Solution Storage Area ( "PSSA ") in order to <br />provide shelter for construction components of the PSES. This shelter will have a soil <br />foundation and will be disassembled upon completion of the PSES construction. The temporary <br />nature of this building precludes any impact on the financial warranty. <br />Metallurgical Laboratory Concrete Pad and Liner Extension <br />CC &V's metallurgical laboratory utilizes a box dump trailer to receive crushed reject material <br />from exploration and mining activities. There is a very remote chance that small amounts of <br />processed ore could be placed in the box dump trailer. As a precautionary measure, CC &V <br />would like to extend a liner system beneath the trailer. The area to be lined is approximately 16' <br />x 26' with a 2' wide trough extending approximately 16' from the concrete pad to the existing <br />liner system associated with the AGVLF. <br />The concrete pad and liner extension will consist of geosynthetic clay liner ( "GCL "), overlain by <br />80 mil double sided textured linear low density polyethylene (LLDPE) liner, 12 oz /yd non <br />woven geotextile, and 6" of reinforced concrete. The sole purpose of the concrete component is <br />to provide an armoring effect to protect the liner system from operational issues such as snow <br />control and routine cleanup activities. The LLDPE liner will be attached to the concrete utilizing <br />industry standard methods of either stainless steel batten strip or polyethylene embedment strip, <br />at the engineer's discretion. Please see Attachment No. 10 - Drawing No. A100 Concrete Pad <br />and Liner Extension Plan View and Attachment No. 11 - Drawing No. A200 Concrete Pad and <br />Liner Extension Sections and Details for additional detail for this project. <br />The installation specifications for the GCL, LLDPE liner, and geotextile will be consistent with <br />installation specifications outlined in Amendment No. 10 to Permit M- 1980 -244. The <br />installation will be overseen by AMEC Environmental & Infrastructure, Inc. ( "AMEC "). A <br />Construction Quality Assurance ( "CQA ") report will be submitted upon completion of the <br />project. <br />Growth Medium Noise Berm Extension <br />Previously approved Amendment No. 10 to Permit M- 1980 -244 contained a provision for a <br />growth medium noise berm along a relatively short section of the northern and western edges of <br />the mining areas. Over the past few months, additional reserves of topsoil from previous mining <br />activities were discovered and need to be preserved for future use in reclamation activities. <br />Extending the noise berm will also be of benefit to the surrounding community. Please refer to <br />Attachment No. 12 - Drawing No. C -4b: Growth Medium Stockpile Locations and Attachment <br />No. 13 - Drawing No. C -4b: Revised Drawing No. C -4b: Growth Medium Stockpile Locations <br />that reflects this change. <br />