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Spill Prevention, Control, and Countermeasure Plan Swift Transportatlon, Inc. — Lathrop, California -^ENSAFE Section 14 Bulk Storage Tanks/secondary Containment February 1016 14.4 BULK STORAGE TANKS/ SECONDARY CONTAINMENT 1.4.1 Tank Compatibility with Its Contents 112.8(c)(1): You must not use a container for the storage of oil unless its material and construction are compatible with the material stored and conditions of storage such as pressure and temperature. The ASTs, containers, and drums used onsite are made of materials (i.e., steel) that are compatible with the storage containers' contents (i.e., diesel fuel, new and used oil), and therefore, conform to the relevant industry standard (NF PA 30 Flammable and Combustible Liquids Code Section 21.4.1.1). 14.2 Diked -Area Construction and Containment Volume for Storage Tanks 112.8(c)(2), You must construct all bulk storage container installations (except mobile refuelers and other non -transportation related tank trucks) so that you provide a secondary means of containment for the entire capacity of the largest single container and sufficient freeboard to contain precipitation. You must ensure that diked areas are sufficiently impervious to contain discharged oil. Dikes, containment curbs, and pits are commonly employed for this purpose. You may also use an alternative system consisting of a drainage trench enclosure that must be arranged so that any discharge will terminate and be safely confined in a facility catchment basin or holding pond. The SPCC rules are based on container capacity rather than the amount of oil maintained in the container. All oil storage containers 55 gallons and greater must have adequate secondary containment. Reference Appendix A for information regarding secondary containment deficiencies. The four ASTs are shop -fabricated double -walled ASTs with the ability to contain the entire contents of each internal primary tank. Petroleum -containing 55 -gallon drums are presently stored both inside the service building and outside in a storage trailer. 14.2.1 Freeboard Determination There are no diked storage areas exposed to rainwater at the terminal, therefore, no drainage or inspections from diked storage areas is required. 14.2.2 Adequacy of Secondary Containment Ali ASTs on the terminal are doubled -walled, which provides adequate secondary containment. The 55 -gallon petroleum product drums in the service building are all set on spill control pallets and the building Itself provides limited secondary containment in the form of an impervious concrete floor, 14-1