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Technical Revision 25, Rev. 1 Schwartzwalder Mine <br /> A review of Figure 1-1 indicates that 2 of the 3 RML license areas have been released (#1 and <br /> #3). RML #2 remains active; however, it will be decommissioned as part of TR-23 activities. <br /> During the preparation of an amendment to RML 369-06, Cotter and the Colorado Department <br /> of Public Health and Environment ("CDPHE") agreed that materials in RML #2 that exceeded <br /> the approved screening criteria will be placed in the Minnesota Adit instead of on the waste rock <br /> piles. Because of the concurrent preparation of TR-23 and the aforementioned RML <br /> amendment, Cotter inadvertently omitted the RML #2 materials from the TR-23 inventory list. <br /> Therefore, TR-25 corrects this omission and provides additional information regarding the <br /> manner in which Cotter will decommission RML #2 pursuant to RML 369-06. <br /> 1.2 SUMMARY OF AMENDMENT TO TR-24 <br /> TR-24 described Cotter's plans to construct the NWTP in an area known as the mesa, which is <br /> near the Steve Adit of the mine. Figure 1-2 shows a plan of the NWTP. TR-24 was approved <br /> before some new equipment was added to the NWTP including two, 20,000-gallon treated water <br /> storage tanks (treated water tanks), one, 7,000-gallon reactor tank, and one, 4,300-gallon clean <br /> water tank. These tanks serve various functions in Cotter's water treatment process, as described <br /> in Section 3.0. Because the NWTP is an Environmental Protection Facility, TR-25 provides the <br /> additional information regarding these tanks, as required in Rule 6.4.21(7). <br /> Mine Permit M-1977-300 <br /> Cotter Corporation(N.S.L.) 2 June 2017 <br />