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The Leadville Mill M 1990-057 <br /> EXHIBIT U —DMO-EPP <br /> Page 14-9 <br /> dospesal ept_iA_AS are 0d_P_.At_if*P_r_1 during the milling eptimization phase, the-se -h-e <br /> Process chemicals will be consumptively used or disposed in the TSF (See Section 4.3 <br /> for more detail). Tailings thickening will be optimized during operation. If other <br /> disposal management options are planned to implement, a CDRMS Technical Revision <br /> (TR) will be submitted for approval <br /> of the TSAF and disposal of designated chemicals <br /> acid beaFing „h,,miGals ; pFavided in Se,-ina , 5 4 TSF reclamation and chemicals is <br /> provided in Section 5.661 <br /> 14.6.2 (8) NARRATIVE DESCRIPTION <br /> (i) DesigRated Chemical Handling During Operation <br /> Chemicals will be handled and stored in accordance with MSDS and- Mine safety and <br /> and <br /> federal, State, and County regulations. Specifically,for this operation,this includes the <br /> following: <br /> • Chemicals will be transported to their designated storage location via vehicle <br /> and unloaded by forklift or manually, <br /> • Chemical storage locations will be locked and secured during non-operating <br /> hours or during periods of cessation, <br /> • Mill personnel will be trained appropriately in the proper storage and use of <br /> site-specific chemicals during the milling operation, <br /> • Chemicals used in the milling operation will be opened and used vVith;n the .,..;II <br /> only be used in the mill, <br /> • Limited volumes of designated chemicals (<5 gallon) will be handled at any <br /> given time; and <br /> • Chemicals will be disposed of properly upon mill closure. <br /> (ii) Designated Chemical Handling during Temporary Cessation or Anal <br /> Rreduct+s+}Closure <br /> 61 AlARIQ43 <br /> Version 3.0 January 2021 <br />