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Mr. Michael Cunningham <br />CDRMS <br />November 26, 2013 <br />18 <br />and File Number fields completed. <br />Response: New Structural Agreements with the structure owner and file number <br />completed are provided in Attachment 11 and will be updated in the permit document. <br />37. The Applicant listed Dale J & Deborali Wibbenmeyer as owners of a structure within <br />200ft of the mill site; however, no structure agreement for the Wibbenmeyer's was <br />provided. Please identify the structure owned by the Wibbenmeyer's and provide a <br />structure agreement for said structure. <br />Response: <br />Mr. Wibbenmeyer indicated via phone that we will receive the agreement shortly. We <br />will provide the agreement to the Division as soon as it arrives. <br />6.4.21 Exhibit U - Designated Mining Operation Environmental Protection Plan <br />38. The Applicant has listed Copper Sulfate as a chemical that will be stored at the mill site. <br />Please explain how Copper Sulfate will be used in the milling process, when it will be <br />used and specify the amount to be stored under 'Section 4.2.7 - Chemical Reagent <br />Inventory'. <br />Response: <br />Copper sulfate (CuSO4) will be used in instances where polymetallic sulfide ores <br />containing high lead and silver values exist. CuSO4 is a reagent used in the flotation <br />process to suppress zinc and increase lead recovery and lead concentrate grade. It is <br />important to have the ability to split lead and zinc as lead smelters pay 95 -96% for silver <br />in the concentrates, whereas zinc smelters do not pay for silver. <br />When used, consumption rate will be between 0.05 - 0.10lb /st or 12lbs /day. The annual <br />consumption is estimated to be 500lbs given that CuSO4 will not be used all the time.. <br />CuSO4 will be purchased in bulk dry form sold in 50# bags. Two hundred and fifty <br />pounds will be kept in inventory. <br />39. The Applicant has stated that diesel will be stored at the mill site. The Division requires <br />secondary containment for fuel tanks. Describe the tank, secondary containment and <br />management of fluids collected by secondary containment. Also, depict the location of <br />any tanks on the appropriate map. <br />Response: <br />UMC will not have permanent diesel fuel storage on site. Approximately 100gal of diesel <br />will be kept in a transfer tank mounted on a pickup. <br />40. As required by Rule 6.4.21(6)(b), please submit a plan that describes how all designated <br />chemicals used in the extractive metallurgical process will be handled during periods of <br />Temporary Cessation. The plan should address stored chemicals/reagents as well as <br />those chemicals and reagents that are present in the mill circuits. The Division will <br />