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Ouray Silver Mines, Inc. <br /> 1900 Main St. Unit 1 <br /> PO Box 564 <br /> Ouray, CO 81427 <br /> ClU��Y S�LL.1ER 14AVE <br /> To: Colorado Division of Reclamation, Mining, & Safety RIONIVED <br /> 1313 Sherman St. Rm. 215 <br /> Denver, CO 80203 � ���June 11, 2021 DIVISION OF RECLAMATION <br /> MINING&SAFETY <br /> Dear Mr. West <br /> Ouray Silver Mines Inc. (OSMI)received Adequacy Review-2 for Technical Revision 14 to Permit <br /> M2012-032 for the Revenue-Virginius Mine(Mine). The Adequacy Review raised 34 major points,each <br /> of which are addressed in italics under headings that repeat the DRMS point of clarification. A list of <br /> tables and attachments added to this Adequacy Review Response is found below. <br /> Table 1: Volume of Reagents <br /> Table 4: Reagent Table <br /> Table 5: Containment volumes <br /> Table 7: Volume to be Drained <br /> QAQC Inspection Criteria <br /> Drawing 500-PI-001 <br /> Updated QC Manual <br /> SL23 Epoxy Technical Data Sheet <br /> Updated Material Containment Plan <br /> Updated Emergency Response Plan <br /> SDS <br /> 1. Table 4. <br /> a. Include the specific manufacturer for each chemical to be used. Rule 6.4.21(5) <br /> b. Alternative Names listed do not match those on the MSDS provided. <br /> Ensure that a different comparable chemical is not being referenced as <br /> approvals are for a specific chemical as provided by a specific <br /> manufacturer,not approval of an entirechemical suite. Rule 6.4.21(5). <br /> c. The corrosive nature of reagent chemicals and their potential impacts to <br /> propertyis not addressed in Table 4. Please revise Table 4 to include this <br /> information pursuant to Rule 6.4.21(5)(a). <br /> Response: <br /> a. OSMI does not concur that Rule 6.4.21(5) requires the operator include the <br /> specific manufacturer for each chemical. OSMI is concerned with identifying <br /> specific manufacturers due to the potential for interruptions in the supply chain <br /> and OSMI is worried about being caught in a situation where it cannot source mill <br /> chemicals. However, based on our discussion with DRMS on June 9, 2021, OSMI <br /> Phone: (970) 325-9830 ♦ Fax: (970) 325-9824 <br />