2019-12-13_REVISION - M1980244 (60)

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ResponseSpill CountermeasuresNEWMONT •r the Cresson Project NORTHAWRICA Sustainability& External Relations impoundment and the entire adjacent ADR-1 building are also underlain by an HDPE barrier that is sloped to drain to the VLF-1. The two TriMac drivers are primarily responsible for transfer of cyanide between the delivery truck and the storage tank.CC&V Team Members provide oversight at the beginning and end of each off-loading,and monitor tank volumes remotely from the ADR-1 control room.The procedures detail safe operation of valves and couplings, precautionary inspections of all connections for leaks,storage tank inspections,and moving the trailer and tank away from the offloading apron. Sodium Hydroxide-NaOH liquid is stored directly west of the ADR-1 in a 20,000-gallon tank within concrete secondary containment and within the tertiary containment of the lined area of the VLF-1.The concrete containment sump is equipped with a float-activated pump that would return fluid to the plant circuit in the event of a release.A release outside the concrete containment would remain on the VLF-1 liner and migrate north toward the main liner system. Hydrochloric Acid-HCI liquid is stored directly west of the ADR-1 in an 8,200-gallon,double-walled tank within concrete containment and within the lined area. Releases outside the tank containment would flow north, completely contained within the liner. Antiscalant-Antiscalant liquid is not a hazardous chemical. It is stored in various locations at the ADR-1 Plant in poly-plastic 600 to 8,000 gallon capacity single-walled,foam-insulated tanks.The ADR-1 is located on liner that drains to the VLF-1.Antiscalant is also stored within the VLF-1 in poly plastic insulated tanks various sizes(see Table 5b for container sizes). Release of Antiscalant should be controlled, even though the residue is not hazardous. Complete removal of impacted soils is not required. Contaminated soils may be placed on the VLF-1 if desired. 4.5.3.4 Laboratory Chemicals Small quantities of chemicals used in the laboratory are stored in designated areas within enclosed structures.All laboratory chemicals are handled in accordance with laboratory safety procedures and are used and stored indoors in small quantities. Spills are very unlikely to escape the laboratory facilities. However,spill response procedures are included in section 5.3.4 of this Plan.The laboratory(lab) is located west of the ADR-1 as shown in Figure 6. 4.5.3.5 Spent Carbon, Refinery Slag, and Used Furnace Crucibles Spent carbon fines and used refinery furnace crucibles are generated from gold beneficiation and refining processes. Refinery slag and used furnace crucibles are sent to the High Grade Mill for further beneficiations and gold recovery. Spent carbon is shipped off site for further gold recovery. 4.5.3.6 Storage of Spent Carbon, Refinery Slag, and Used Furnace Crucibles at ADR-1 Plant The spent carbon is collected in mesh sacks and stored on wooden pallets outside,west of the ADR-1 building on the VLF-1 lined area.The refinery slag and used furnace crucibles are stored in labeled drums in the refinery area. 4.5.3.7 Spill Prevention for Spent Carbon,Slag, and Crucibles Spent carbon sacks may release material during filling or when moved. During transfer from storage to a transport vehicle, spills may occur.A release of spent carbon will be scooped up and placed into a spent carbon sack. Refinery slag and used furnace crucibles may be spilled if a drum tips over during transfer from the storage area to a transport vehicle. In the event of a release,the spilled materials will be scooped up and returned to the storage drum prior to transport. 4.5.4 Spill Response Procedures Section 5.0 provides the general spill response procedures for use at the ADR-1 Plant. ----------_-..-_----- ----- - - --- - ------- - - - - Department THIS DOCUMENT IS UNCONTROLLED IN HARDCOPY FORMAT * Doc Id:NA 1930 R PLAN- 1930