2019-12-13_REVISION - M1980244 (60)

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ResponseSpill NEWMONT Countermeasures Plan for the Cresson Project Sustainability 4.2.3 Discharge Prevention Ironclad Facility-The most important activity to prevent spills and potential discharges at the Ironclad Facility is operator care in the transfer of fluids, using common sense and diligence in making sure connections are secure, drip pans are in place,and containers are positioned to receive fluids properly. Bulk storage of petroleum products is primarily inside the Ironclad Shop/Warehouse building in the Oil Room.The Oil Room floor consists of a concrete slab, overlaying a gravel bed,on top of a concrete-lined "vat". Spills from tanks in the Oil Room,whether from tank rupture, overfilling, or pump/piping leaks,will be contained inside the containment structure within the Oil Room containment area.The gravel fills a concrete-surfaced "vat"that was previously used for mineral beneficiation.Any spilled petroleum fluids would be captured on the floor or within the gravel layer inside this concrete lined containment.The containment volume above the gravel fill is about 40,840 gallons(32.5-feet(ft)x84-ft x 2-ftx7.48 gallons/ft).Subtraction of the volumes occupied by the tanks themselves leaves about 25,700 gallons of available containment.Therefore,the containment structure is more than adequate to hold 110%of the volume of the largest tank(12,000 gallons).There is a nine-connection fill manifold located outside the building on the west side of the Ironclad Facility.The nine off-loading connections on this manifold are directly linked to the tanks in the Oil Room.All fill lines are fitted with back-flow check valves located near the outside-terminus of the fill lines.Air vents from the top of the tanks are directed to the gravel underlying the tanks.A small concrete pad provides minimal secondary containment at the off-loading area. Some of the used oil may be burned in oil-fired furnaces that provide heat to the Ironclad Facility.Off-site recycling of used oil occurs on a regular basis in the summer months when there is a surplus of used oil. Prior to these transfers of used oil the volume of used oil remaining in the tank will be estimated using the tank's electronic level indicator.This indicator is located on the west wall of the tank farm.Any transfers of used oil from the storage tank to a transporter's truck will be attended by the transporter to monitor for leaks and/or spillage. Transfer Areas at the Ironclad Facility-Transfers of petroleum products and antifreeze from bulk tankers at the Ironclad Facility will occur on the North side of the building on a 14-foot concrete containment pad sloped towards a sump that can be pumped to the used oil storage tank.The fill lines are fitted with back-flow check valves located near the outside-terminus of the fill lines.A spill of antifreeze will be managed separately from used oil and will be placed in a container labeled "used antifreeze."The majority of the used oil generated by oil changes in the Ironclad Facility is burned in oil-fired boilers that provide heat to the New Truck Shop. Off-site disposal of used oil occurs on very irregular basis when there is a surplus of used oil. Prior to these transfers of used oil,the storage tank will be "stick-measured"to estimate the volume of used oil remaining in the tank.Any transfers of used oil from the storage tank to a transporter's truck will be attended by the transporter to monitor for leaks and/or spillage. NITS-The most important activity to prevent spills at the NTS is operator care in the transfer of fluids, using common sense and diligence in making sure connections are secure, drip pans are in place, and containers are positioned to receive fluids properly. Bulk storage of petroleum products is primarily inside the NTS building in the Oil Room.The NTS Oil Room is a secondary containment in itself,with a concrete floor and footings that extend up at least one foot from the floor in order to provide 43,000 gallons of containment capacity. Spills from tanks in the Oil Room, whether from tank rupture, overfilling, or pump/piping leaks,will be contained inside the containment structure.The containment structure is more than adequate to hold 110%of the volume of the largest tank(12,000 gallons). Mounted on the wall of the NTS Oil Room is an electronic display panel that monitors the volume of materials in the various tanks. There is an enclosed thirteen-connection fill manifold located outside the building on the north side of NTS.The 13 off-loading connections on this manifold are directly linked to the tanks in the NTS Oil Room.All fill lines are fitted with back-flow check valves located near the outside-terminus of the fill lines.The off-loading area is built on a concrete containment pad that slopes in-ward to the building and there is a sump beneath the pad that will collect spills. Collected fluids in the sump can be pumped to the used oil storage tank. No overfill warning devices are installed. -- ------ -- ------- ---- ----- --- ------- ----- -- --------- -------- -------- -- - '- Department THIS DOCUMENT IS UNCONTROLLED IN HARDCOPY FORMAT Doc Id: NA-CCV-SER-PLAN- 1930 -----------------------------------------------------4---------------------- ------------