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O Climax Molybdenum Climax Mine <br /> AL­ Highway 91 - Fremont Pass <br /> A Freeport-McMoRan Company Climax, CO 80429 <br /> p p Y Phone (719) 486-7718 <br /> Fax (719) 486-2251 <br /> May 22, 2020 RECEIVED <br /> %�- Dustin Czapla MAY 2 7 2020 <br /> Environmental Protection Specialist <br /> Division of Reclamation, Mining and Safety DIVISION OF RECLAMATfON <br /> Department of Natural Resources MININGAND SAFEP`! <br /> 1313 Sherman St. Room 215 <br /> Denver, Colorado 80203 <br /> RE: Climax Mine,Permit No. M-1977-493, Reagent Testing <br /> Dear Mr. Czapla <br /> Climax Metallurgy would like to run a short test on two new frothing reagents that would be used in <br /> the flotation process. The reagents are Quadrafroth P75 and Quadrafroth P100 from Quadra <br /> Chemicals Inc. (see attached SDS's). The proposed dosing rate for these reagents would be <br /> 0.05lb/ton of ore. The test will occur over the next month. Both reagents will be stored in a 275 <br /> gallon tote and placed on a secondary containment pallet with in the mill building to provide tertiary <br /> containment. In the event we see any issues with our process from the reagent testing, we will <br /> discontinue the test and dispose of the remaining chemical in accordance with waste regulations. We <br /> will update the EPP if we decide to make this change permanent. <br /> Please let me know if you have any concerns. We would like to begin the test as soon as possible. <br /> Sincerely, <br /> .'_ f <br /> Diana Kelts <br /> Environmental Manager <br /> attachments <br />