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O-R-A) S♦Lt ER A1nuE5 <br /> Table 1: Reagent Use <br /> Reagent Usage <br /> Zinc Sulfate 131.5 gal <br /> Sodium Metabisulfite 314.6 gal <br /> Areophine 3418 48.4 gal <br /> PolyFloat 3760 23.0 gal <br /> PolyFroth W20 33.3 gal <br /> Hydrated Lime 323.1 Ibs <br /> Copper Sulfate 115.4 gal <br /> Sodium Isopropyl Xanthate 40.8 gal <br /> Flocculant AF-309 204.6 gal <br /> 3. Tailings Management <br /> The mill generated approximately 1,784 tons of tailings during the fourth quarter 2021. <br /> What was generated was transported to the temporary lined tailings storage area and <br /> tested for SPLP, TCLP and ABA. Moisture content of the tailings was 18%. Results of <br /> SPLP, ABA, and TCLP tailings analysis were below regulatory limits. These results were <br /> submitted to the Division. <br /> Future quarterly reports will include a mass balance of reagent use as well as additional <br /> analytical results from tailings testing once the Reagent Room is certified and the mill is fully <br /> operational. <br /> If you have any questions, please contact me at (970) 325-7241 ext. 1014. <br /> Sincerely, <br /> i <br /> John Thiel <br /> Mill Manager <br /> Ouray Silver Mines Inc. <br /> Cc: Amy Yeldell, DRMS <br /> Mike Lee, OSMI <br /> Todd Jesse, OSMI <br /> Poppy Staub, OSMI <br /> 2 11 <br />