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Al <br />Mr. Peter Hays, DRMS <br />September 18, 2015 <br />(d) No monitoring or analyses were performed for this situation since process water and/or <br />material was not released off-site and did not impact waters of the United States. <br />(e) The investigation for this event is still ongoing. At present, the low-pressure leak coming <br />from between the anchor block and TDL has been stopped using WaterStop, a product <br />which swells up in the presence of water, to stop leaks. At present, the system is <br />currently running, and the area continues to be monitored for leaks. If any are noticed, <br />flow will again be diverted to the Emergency or No. 1 Cutout structures upstream of the <br />release point. Camera services have been requested for the line in the upcoming weeks. <br />The plan is to send a camera device down the line to inspect the interior of the line. <br />Based upon the position of the anchor block, it is covering a welded seam. The seam is <br />suspected to be the cause of the issue. Ultimately, once a cause of the leak can be <br />determined, our plan is to cut this section of the pipe out of the line and reinstall a piece <br />of HDPE where the leak originates. This work is anticipated to be completed within the <br />next month, when a camera probe system and a 42" fusion welder can be mobilized to <br />the site. Henderson will plan to follow-up with the Division once upcoming information is <br />ascertained and a repair is complete. <br />If you have any additional questions or concerns, please feel free to contact me at 720-942-3518 or <br />Miguel Hamarat at 720-942-3255. <br />Sincerely, <br />Tim Haynes <br />Sr. Environmental Engineer <br />Climax Molybdenum Company <br />Henderson Mill <br />CC (via email): <br />B. Romig, Climax <br />M. Hamarat, Climax <br />T. Haynes, Climax <br />S. Deely, Freeport-McMoRan <br />N. Hall, Freeport-McMoRan <br />L. Decker, Gallagher & Kennedy <br />Page 2 <br />