2004-07-09_REVISION - M1977493 - Laserfiche WebLink

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5.1.1.3 Phosphorus Pentasulfide (PzSs) and Nokes Reagent (NR-1) • Not currently (May 2004) onsite due to standby status of the mine. Description: PzSs is agreenish-yellow solid that is combined with caustic soda (NaOH) and water to form Nokes reagent. Nokes reagent is incorporated into the mill circuit as a lead depressant. While solid PzSs can cause skin imtation, the primary health hazazd is the release of hydrogen sulfide gas upon contact with water. Climax utilizes instant Nokes reagent (NR-1) which is apre-mixed compound consisting of PISS and NaOH. Location: Nokes Building and adjacent storage dock. Spill Potential: Low. Potential Volume Spilled: One drum of granulaz material or 400 pounds on the dock; or up to 1500 gallons in the holding tank in the Nokes Building. Prevention and Control: Spills of granulaz PzSs on the storage dock at the Nokes Building can be contained by diking with sorbent booms, sand bags, or by simple containment with a shovel. Spillage or leakage of liquid Nokes reagent in the 1500-gallon tank in the Nokes Building is controlled by a recessed sump capable of holding 8000 gallons. Spills of granulaz PISS azound the mixing hopper in the Nokes Building can be controlled in a manner similar to those on the • storage dock. Countermeasures: Spills of granulaz material should be scooped up with a shovel and either replaced in the storage container or fed into the mixing tank hopper. Liquid spills in the sump can be either pumped back into the holding tank or into the Regrind Thickeners. PzSs can be neutralized with lime or NaOH (sodium hydroxide) if the liquid Nokes reagent escapes containment at the Nokes Building and threatens to flow in the adjacent ditch. Nearest Clean-up Equipment: A spill kit is located in the western end of the mill building. Shovels are located on the Nokes Building storage dock. Visual Inspections and Integrity Testing: The Nokes Building is checked daily during mill operation. Weekly checks are made when the mill is not operating. Reporting: Spills of over 100 pounds which threaten the waters of the State of Colorado aze subject to the reporting requirements of Sections 4.2, 4.3, and 4.4 of this SPCC Plan. All spills should be reported to the Environmental Department by using the "Spill Incident Report" form given in Appendix 1. Conformance with Applicable Requirements: Since no phosphorus pentasulfide is in use [at the time of this writing (May 2004)] the facility is in conformance with applicable regulatory . requirements. 16