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STATE OF <br />COLORADO <br />Reagent Testing at Climax <br />2 messages <br />McGiII, Brian <Brian_McGill@fmi.com> <br />To: "eric.scott@state.co.us" <eric.scott@state.co.us> <br />Cc: "Lazuk, Raymond" <Raymond_Lazuk@fmi.com> <br />Hi Eric, <br />Scott - DNR, Eric <eric.scott@state.co.us> <br />Fri, Mar 4, 2016 at 9:36 AM <br />Climax Metallurgy is running a short test on a new reagent to depress iron. The reagent is Flomin BDX500 <br />(MSDS attached) and is similar to the Orfom D8 reagent that Climax is currently using to depress iron. The <br />BDX500 dosing rate will be around 0.035 — 0.055 Ib/ton of ore milled and will be added to the cyclones from a <br />tote staged at the cyclone deck. This will be a short-term test and will last around one week or less. In case we <br />see any issues with our process from the test reagent we will discontinue the test and dispose of the remaining <br />chemical in accordance with waste regulations. As indicated above, the tote will placed on the cyclone deck on <br />the grinding side of the mill where we have concrete floors and a sump to provide both secondary and tertiary <br />containment in case of spills. We will be plan to update to the EPP if we decide to make this a permanent <br />change. <br />Please let me know if you have any concerns. We would like to begin testing right away. <br />Thanks, <br />Brian <br />Brian D. McGill <br />Chief Environmental Engineer <br />Climax Mine <br />Highway 91 -Fremont Pass <br />Climax, CO 80429 <br />office: 719.486.7718 <br />cell: 719.271.3394 <br />fax: 719.486.2251 <br />email: Brian_McGill@fmi.com <br />