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5.1.1.4 Dowfroth 250 <br /> Description: Dowfroth 250 is a frothing agent in the milling process. <br /> Location: Oil tank house north of the Mill Building. <br /> Spill Potential: Very low inside oil tank house; moderate at fill inside Regrind Tunnel where <br /> it's off-loaded. <br /> Potential Volume Spilled: 16,000 gallons if full tank spilled in oil tank house. <br /> Prevention and control: The 16,000-gallon Dowfroth tank is located in a large concrete vault <br /> below grade in the oil tank house. This vault easily could contain the entire stored volume of <br /> Dowfroth. A floor drain connects with mill process lines should a spill occur. Spills of <br /> Dowfroth at the unloading hose in the Regrind Tunnel can be prevented by operator care and <br /> making sure connections are secure between tanker and the hose coupling. <br /> Countermeasures: Small spills in the oil tank house can be cleaned up with floor dry and <br /> shovels. Larger spills will require sorbent booms and floor dry. In the Regrind Tunnel, small <br /> spills will be absorbed by floor dust and loose material comprising the road surface. Oil stained <br /> dust should be scooped up with a shovel. Larger spills will be controlled by sorbent booms or <br /> dikes. <br /> Nearest Clean-up Equipment: A spill kit is located in the west end of the mill building. <br /> Monitoring: The oil tank house is checked daily and the unloading hose and coupling are <br /> checked daily during mill operation. Checks are made monthly when the mill is shut down. <br /> Reporting: All spills of Dowfroth 250 which threaten waters of the State of Colorado are <br /> subject to the requirements of Sections 4.2, 4.3, and 4.4 of this SPCC Plan. All spills of 5 <br /> gallons or more should be reported to the Environmental Coordinator by using the "Spill.Incident <br /> Report" form given in Appendix 1. <br /> 13 <br />