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The Leadville Mill <br />• Following installation of the subdrain, compaction to 95% <br />standard proctor, ±2% optimum moisture, and grading of sub <br />base on interior slope ±1" on 50ft grid, then the geosynthetic <br />clay liner is installed. <br />• If the geosynthetic clay liner is prematurely hydrated during installation, it <br />may remain in place if the following conditions are met. <br />o Geotextiles have not been separated, torn or otherwise damaged. <br />o No evidence that needle punching between the geotextiles has been <br />compromised. <br />o Geosynthetic clay liner does not leave deep indentions when walked <br />upon. <br />o Overlapped and bentonite- enhanced seams are intact. <br />LEAK DETECTION AND SUMP CONSTRUCTION <br />• Performed by contractor, monitored by Mill Superintendent and /or Owner's <br />Engineer. <br />• Layout and grade detection layer collection sump system. <br />• Liner material contractor will install and test the leak detection drainage net <br />system in accordance with manufacture's recommendations. <br />IMPOUNDMENT LINER INSTALLATION <br />M 1990 -057 <br />EXHIBIT C — MILL PLAN <br />Page 4 -17 <br />• Performed by contractor, monitored by Mill Manager and /or Owner's <br />Engineer. <br />• Layout and grade anchor trench for geomembrane liner. <br />• Liner material contractor will inspect the substrate and anchor trenching prior <br />to commencing installation. <br />• Panel installation will occur in reasonably clam weather conditions with <br />ambient temperatures in excess of 40 °F and no precipitation. <br />• Sample seams will be made on a daily basis to establish a proper film bond <br />tear. <br />• Seaming crews will overlap the material ±6in and construct a minimum tin <br />wide fully bonded seam without wrinkles or voids. <br />• If wrinkles occur, the seam will be cut and patched accordingly, a minimum of <br />4in beyond the problem seam in all directions. <br />Version 1.0 April 2013 <br />