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Sunrise Mining, LLC <br /> P.O. Box 160 <br /> Arvada, CO 80001 <br /> November 15, 2017 <br /> Lucas West <br /> Environmental Protection Specialist <br /> Colorado Division of Reclamation, Mining & Safety <br /> 1313 Sherman Street, Room 215 <br /> Denver, CO 80203 <br /> Dear Mr. West: <br /> Per the "May Day Idaho Mine Complex, File No. M-1981-185, 112d-2 Amendment(AM-2) <br /> Request for Final Clarifications" dated November 14, 2017, the responses to the two issues <br /> defined in the letter are as follows: <br /> 1. Exhibit U—Environmental Protection Plan <br /> a. In the previously submitted adequacy response dated November 9, 2017, a <br /> narrative clarifying the construction details of the ore storage pad at the Base of <br /> Operations was included. Also included were amended figures C-8 and D-3. <br /> While that clarifies the construction details of the base of the ore pad, the <br /> secondary containment drawing was also removed from those figures. The <br /> Division wishes to clarify that in addition to the liner of the ore storage pad, it <br /> must also have secondary containment structures as detailed in the previously <br /> submitted figure D-3. Please commit to installing both the 4-inch compacted clay <br /> liner as well as the secondary containment berms around the perimeter of the ore <br /> storage pad as detailed in the upper left hand corner of the previously submitted <br /> figure D-3. <br /> Response: Secondary containment will be provided for the ore storage pad <br /> located at the base of operations. A 4-inch compacted clay liner will be <br /> installed on a six-inch scarified soil base as indicated and secondary <br /> containment berms will be built around the perimeter of the ore storage pad. <br /> The berms will be built to specifications approved by DRMS and details of <br /> the berms and the storage pad will be confirmed in as built drawings when <br /> the construction of the storage pad is complete. <br /> 1 <br />