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• 5.2.1.13 Diesel Fuel Storage in Generators at Climax Mine <br />Description: Portable generators, for inclusion in this SPCC/MCP, will refer to those <br />generators that have oil in individual tanks with capacities of 55 gallons or greater. This <br />determination is based on page 47044 of the July 17, 2002 Federal Register "Summary of Major <br />Revisions to the Current SPCC Rules" table which states that the threshold (1320 gallons in <br />containers greater than 55 gallons) applies to storage capacity contained in operating equipment <br />as well as to storage capacity contained in tanks. Further definition and additional justification <br />for this determination is found on page 47066 of the same Federal Register where it states that <br />"You need only count containers of 55 gallons or greater in the calculation of the regulatory <br />threshold." The table below provides a list of the generators in use asback-up power sources at <br />Climax Mine. <br />Location Tank Volume Contents Containment Style <br />Onan Unit at No. 3 Mill Steel 336 gal Diesel Concrete Slab+Sump <br />Onan Unit at Robinson Lake Steel 336 gal Diesel Concrete Slab <br />Onan Unit at McNulty Lime Steel 336 gal Diesel Concrete Slab <br />#89-1466 - Mayflr Pump Sta Steel 55 gal Diesel Concrete Slab <br />#13-8001 at SWPPS Steel 317 gal Diesel Concrete Slab <br />Onan Unit at EPR Seep Steel 336 gal Diesel Building Sump <br />• <br />Spill Potential and Volume Spilled: Potential is low. The most likely amount of fuel or oil <br />spilled from the generators is on the order of 1 to 5 gallons. Atypical spill might involve a line <br />break during filling the units. Flow direction is even more dependent on where the line break or <br />spill occurs. In general, the generators aze located on concrete slabs in covered buildings where <br />spills can be contained inside the structures. These factors are helpful in spill containment, <br />therefore it would be unlikely that a spill would report off the site before it could be properly <br />cleaned up and disposed. <br />Prevention, Control, Containment, and Diversionary Structures: Operator care during <br />transfer of diesel from the tanker truck to the generator reservoir is the best way to reduce <br />spillage. Because the volume of potential oil spillage is expected to be minimal, containment <br />inside the buildings will provide adequate control in the unlikely event of a diesel spill. <br />Countermeasures: Sorbent booms or pillows should be used to absorb any spilled diesel. <br />Disposal of soiled booms, pillows, or stained soil should be in the Climax landfill, with the <br />approval of the Environmental Department. <br />Nearest Clean-up Equipment: Spill kits aze located in the Moly Wazehouse, Open Pit Shop, <br />and other locations onsite. <br />Visual Inspections and Integrity Testing: Portable generators aze checked weekly by the <br />• operators and water technicians when in the mine is in operation. At a minimum during idle <br />periods, visual inspections of generators will be conducted monthly to ensure that appropriate <br />methods are employed to control any potential spills. <br />39 <br />