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3.3 Dismantle Buildings and Structures at Portal Area <br /> Reclamation will include the removal of certain buildings and other structures. The <br /> following structures will be removed at the Revenue Portal area: <br /> • Diesel storage and filling station <br /> • Propane storage A <br /> • Propane storage B <br /> • Propane storage C <br /> • Ventilation Fan <br /> • Underground warehouse and shop <br /> • Waste storage building and secondary containment <br /> • Tailing thickener tank and related super structure <br /> • Materials storage buildings(2) <br /> • Crusher and retaining wall <br /> • Monitoring wells <br /> The facilities generally have either 6 or 12-inch concrete foundations. As shown on <br /> Map F-1 and Map F-1 a, various structures will remain as part of the post-mine land <br /> use. Mill equipment will be removed and repurposed or sold upon final reclamation. <br /> As noted in TR-14 and TR-15, process water and mill reagents will be drained from <br /> tanks and piping prior to dismantling the structures. The intent is for mill reagents to <br /> be used in the process. Remaining reagents and other chemicals, if any, will be either <br /> returned to the manufacturer or characterized and properly disposed of in accordance <br /> with waste disposal regulations. Should process tanks and piping require <br /> detoxification, OSMI anticipates the volume of water to rinse the system to be 10,000 <br /> to 40,000 gallons. Rinse water will be contained, characterized and disposed of in <br /> accordance with application regulatory requirements. <br /> A list of buildings / structures that will remain on site is provided on Map F-1 a as <br /> Exhibit E Reclamation Plan E-7 <br /> Amendment 02 <br /> Updated August 2022 <br />