2008-04-15_REVISION - M1980244 (311)

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Table 3. Storage Tanks Outside the Ironclad Shop/Warehouse • Tank Contents .Tank Label Description Capacity allons Diesel Fuel for Fire Suppression Generator Diesel Fuel Cylindrical 353 west of the Ironclad Facilit Steel ' Propane (east of Ironclad Truck Shop) Propane Cylindrical 5,000 Steel Propane (near Light Vehicle Shop) Propane Cylindrical 500 ~ Steel Propane (near Light Vehicle Shop) Propane Cylindrical 500 Steel i 4.1.1.2 Quantities of Material Stored and Secondary Containment (Ironclad Facility) By referring to Tables 2, and 3 above and the tank inventory in Appendix C, it is evident that over 30,000 gallons of oil can be stored in the containers at the Ironclad Facility at any point in time. Approximately 6,000 gallons of propane capacity exists at the Ironclad Facility, and 2,000 gallons of antifreeze can be expected to be in storage. Smaller quantities of aerosol can residues (<55 gallons) may also be present. The tank inventory in Appendix C lists the volume of secondary containment for Ironclad storage and use areas. Adequate secondary containment exists for all containers, as discussed in section 4.1.1.4 below. 4.1.1.3 Spill Potential of Materials at the Ironclad Facility The greatest potential for spills at the Ironclad Facility is in the transfer of used oil into the drip tray units when changing oil or the transfer of fluids in the drum and tote storage area of the warehouse. In either case, the quantities spilled would most likely be on the order of several gallons.. In the unlikely event of a large tank rupture in the Oil Room, several hundred gallons could report to the secondary' • containment vat, but there is virtually no chance that oil spilled could escape containment in the covered and contained building. The overall spill potential is rated as low. 4.1.1.4 Spill Prevention and Control at the Ironclad Facility Ironclad Shog/Warehouse The most important activity to prevent spills 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 has agravel-filled base on top of aconcrete-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 graveled area. The gravel fills aconcrete-surfaced "vat" that was previously used for mineral beneficiation. Spilled petroleum fluids would be caught in the gravel iri this concrete-lined containment. The containment volume above the gravel fill is about 40,840 gallons (32.5'x84'x2'). 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; see Table 2 above). There is anine-connection fill manifold located outside the building on the west side of the Ironclad Shop/Warehouse. 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. No overfill warning devices are installed. A small concrete pad provides minimal secondary containment at the off-loading area. • Spill Response Plan September 25, 2006 EMS: AGANA/CCVS:\4010-00055 CC & V 112(d) Permit Application\ERP, SPCC, FMP\SRP_05-06.doc Doc. # E-006 S:\4010-00055 CC & V 112(d) Permit Application\ERP, SPCC, FMP\SRP_05-06.doc Revision 03 Printed Copies are Uncontrolled 13