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No solution went off liner. To remedy ponding along the Phase 5 pump road, which is on liner, <br />the following steps have been taken: the lines have been shortened so that the solution has an <br />opportunity to be absorbed into the slope of the leach pad above the road. This will retard <br />pooling on the more compacted road. The level of the road was raised and graded to promote <br />drainage off the road. And staff repaired lines with broken ends which forces the solution to <br />weep from the lines further up slope. Please find attached photographs taken by CC&V as the <br />Phase 5 road appeared after mitigation (photograph 1, 2 and 3). <br />Management of ponding solution is governed by best management practices that are defined in <br />the EMS. <br />Potential ponding on the VLF is managed under the Cresson VLF Guidelines (August 2013). <br />The plan resides in the Environmental Management System (EMS) under Standard <br />Environmental Procedures (SEP) / Process. According to that plan: <br />The VLF shall be inspected daily for operational issues — blown drip lines, leaking <br />headers, puddling of solution, and inspection of the edge of liner and edge of liner <br />signage etc. Any area of standing process solution with a surface area larger than 3' X 3' <br />should be corrected as soon as reasonably possible. <br />The Wildlife Protection Plan, which is also part of the EMS contains the same processes for <br />managing ponding. <br />During pad construction the process of cross ripping the pad surface, described in the Cresson <br />VLF Guidelines, prevents ponding during normal circumstances by keeping the surface porous. <br />In this instance, the solution ponded on a compacted road surface that could not be ripped as the <br />road provides access along a narrow bench to the Phase 5 pumps. CC&V therefore implemented <br />the procedures described above to keep solution from ponding on the road. <br />Please contact me at (719)-689-4048 should you have questions or wish to discuss this request <br />for a technical revision. <br />Sincerely, <br />Chris Hanks <br />Chief Environmental Coordinator <br />cc: Jonathan Gorman <br />Enclosures <br />