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Homestake Mining Company May 10,2019 <br /> Regular(112d)Operation Reclamation Permit Application Package <br /> o Installation of additional wells at the underground mine workings (P-13, P-14, and <br /> P-15), at the base of the IRD (RD-05), and on the 10300 level of the IRD (RD-06, <br /> RD-07, RD-08, and RD-09). <br /> • In-ground pilot testing of a Zerovalent Iron (ZVI) based ETC adjacent to Tie Camp <br /> Drainage. <br /> • Additional drum-scale ETC tests, including a biochemical reactor design (solid-phase <br /> organic media). <br /> 2018 water treatment activities consisted of the following: <br /> • Continued operation of the phosphate dosing systems on the IRD and underground mine <br /> workings. <br /> • Construction and operation of a field-implementation pilot-scale biochemical reactor- <br /> based ETC to capture water from the Chester Fault springs at the North Pit Lake. <br /> EXHIBIT E-RULE 6.4.5(AMENDED RECLAMATION PLAN) Page 12 <br /> HOMESTAKE MINING COMPANY <br />