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Diesel Fuel ASTs at Bldg D Fire Pump(on west property boundary) <br /> A single-walled tank was taken out of service in 2010 and replaced by a double-walled AST. <br /> Since the single-walled AST remains onsite in the fire pump shed and is not considered <br /> "closed"by the SPCC Plan standards,the single-walled AST remains in the SPCC Plan. A <br /> double-walled AST was installed outside the Bldg. D Fire Pump shed. The double-walled <br /> tank was designed to contain at least 100% of the interior primary tank. <br /> 1,000-gallon Salvage/Used Oil AST <br /> There is no dedicated secondary containment structure provided for the 1,000-gallon <br /> Salva a/used oil AST located within the A/B furnace basement. The tank is double-walled <br /> which meets the secondary containment requirements for 40 CFR 112.8(c)(2). The tank is <br /> also located near the oiUwater separator. The capacity of the oil/water separator should be <br /> sufficient to prevent a release outside of the building from a complete failure of the tank. <br /> This would prevent a release from leaving the property and the oil could be collected for <br /> proper disposal. <br /> The facility elected to provide dedicated secondary containment for the tank or to replace it <br /> with a tank/system with dedicated secondary containment (see Proposed Schedule of <br /> Modifications at the front of this Plan.) <br /> 1 000-Qallon Salvage/Used Oil AST <br /> There is no dedicated secondary containment structure provided for the 1,000-gallon <br /> salvage/used oil AST located on the ground level of the furnace building. The tank is <br /> double-walled which meets the secondary containment requirements for 40 CFR 112.8(c)(2). <br /> The tank is also located near the oil/water separator. The capacity of the oil/water separator <br /> should be sufficient to prevent a release outside of the building from a complete failure of the <br /> tank. This would prevent a release from leaving the property and the oil could be collected <br /> for proper disposal. <br /> The facility elected to provide dedicated secondary containment for the tank or to replace it <br /> with a tank/system with dedicated secondary containment (see Proposed Schedule of <br /> Modifications at the front of this Plan.) <br /> Three Emergency Generator Belly ASTs <br /> The following ASTs do not have dedicated, sized secondary containment dikes or berms: the <br /> diesel generator belly ASTs (140, 195 and 195 gallons each). The belly tanks are located on <br /> the ground level of the furnace buildings indoors. These diesel generator tanks are located in <br /> areas that a release of the maximum tank capacity would not discharge offsite through <br /> surface flow based on the topography of the areas being lower than the property boundary. <br /> The tanks are located downgradient of the property fenceline and at a distance that a release <br /> of each entire tank's contents should not be able to discharge offsite to a surface water body. <br /> The areas are provided with general secondary containment to prevent an offsite discharge of <br /> oil. Potential releases would be limited to less than 195 gallons and would be cleaned up <br /> before flow offsite could occur. The Professional Engineer recommended providing <br /> 2; May 20171 -'816 <br />