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5.2.1.1(a) Open Pit Truck Shop Fuel and Oil Storage (Outside) (cont.) <br />• Potential Volume Spilled: Although unlikely, if each tank was full and ruptured simultaneously, <br />the spill volume = 45,350 gallons. Most likely volume is several thousand gallons. <br />Prevention and Control: This fuel and oil storage area is divided into two sections, north and <br />south, and each section is protected by a lined earthen berm. The north section is capable of <br />containing a spill of 30,500 gallons. The south section is capable of containing a spill of 32,150 <br />gallons. The distribution building (aka oil shed) and the underground piping corridor have <br />containment systems (vaults, pits, and a sunken stairwell) capable of containing in excess of <br />36,000 gallons of petroleum products. At the downgradient end of the pipe corridor, beneath the <br />oil storage room, is a sump that temporarily holds spilled oil and water mixtures. The sump is <br />periodically pumped free of oiUwater mixtures that aze stored in a 69 gallon reservoir in the oil <br />shed. This reservoir holds oily water mixtures until such time as the used oil disposal company <br />(for instance, Mesa Oil) pumps out the reservoir. In addition, the piping corridor itself represents <br />21,000 gallons of secondary containment and the building itself (plus sumps) can contain over <br />100,000 gallons of fuel. Level indicators for all the lazger tanks aze mounted on the wall inside <br />the oil shed and these can be visually inspected to determine the volume in each tank at any given <br />time. Pipe, valves, fittings, and controls that connect the outside storage tanks with the Open Pit <br />Shop aze all visible and aze regulazly visually inspected for leaks. <br />~ Countermeasures: Spills contained within the berm can be absorbed with booms or pillows and <br />consolidated for disposal. Inside the fuel and oil distribution building, or in the underground <br />piping corridor, minor spills can be cleaned up with floor dry and a shovel. Spills outside the <br />earthen berm should be diked with sorbent booms or pillows. Oil stained soil should be scooped <br />up with a shovel or end loader and disposed of in Climax' Landfill with the approval of the <br />Climax Environmental Department. <br />Nearest Clean-up Equipment: Spill kits aze located in the Open Pii Shop. <br />Visual Inspections and Integrity Testing: During open pit mining operations, the fuel storage <br />azea is checked daily; weekly when the pit is idle. During standby status, inspections aze <br />conducted on a monthly basis. Integrity testing and professional "in-service inspections" for the <br />6000 gaI Diesel Tank and the 12,000 gal Used Oil Tank at the Open Pit Shop Petroleum Storage <br />Area were performed in recent yeazs (2000) by Conam Inspection Inc. Integrity testing results aze <br />included in Appendix 3. <br />Reporting: All oil spills should be documented on the "Spill Incident Report" form immediately <br />(Appendix 1), and given to the Environmental Department. <br />Conformance with Applicable Requirements: The overall housekeeping effort was observed <br />to be good during site inspections of April 10 and June 20, 2003. All steel tanks appeaz to be in <br />good condition. Containment is more than adequate to hold the volume of the largest tank plus an <br />. allowance for precipitation. Applicable state guidelines are assumed to be the same as the <br />Federal Regulations at 40 CFR Part 112, and therefore, under §112.7(j) the Open Pit Shop <br />Petroleum Storage Area is currently in conformance with applicable requirements with respect to <br />secondary containment. <br />25 <br />