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E Spill Prevention, Control, and Countermeasure Plan Swift Transportation, Inc. — Lathrop, California *"ENSAFE Section 14: Bulk Storage Tanks/Secondary Containment February 2016 Two 55 -gallon petroleum product drums stored inside the trailer adjacent to the service building are not set on spill containment pallets and should be, or set in some other type of secondary containment structure. However., the trailer itself provides limited secondary containment in the form of an impervious metal floor. Refer to the terminal oil storage inventory in Table 3-1 for secondary containment details for containers subject to SPCC regulations. Appendix A provides a summary of regulatory deficiencies related to secondary containment. 14.2.3 Impermeability of Secondary Containment The ASTs are all double -walled steel tanks, which acts as impermeable secondary containment. Spill containment pallets used for the drums in the service building are constructed of impervious plastic and are set on an impervious concrete floor. The metal floor of the storage trailer containing drums is impervious. 14.3 Diked Area, Inspection, and Drainage of Rainwater 112.8(c)(3): You roust not allow drainage of uncontaminated rainwater from the diked area into a storm drain or discharge of an effluent into an open watercourse, lake, or pond, bypassing the facility treatment system unless you: (i) Normally keep the bypass valve sealed closed. (ii) Inspect the retained rainwater to ensure that its presence will not cause a discharge as described in §112.1(b). (iii) Open the bypass valve and reseal it following drainage under responsible supervision; and (iv) Keep adequate records of such events, for example, any records required under permits issued in accordance with 40 CFR 122.41(1)(2) and 40 CFR 122.41(m)(3). There are no diked storage areas exposed to rainwater at the terminal; therefore, this section is not applicable. 14.4 Corrosion Protection of Buried Metallic Storage Tanks 112.8(c)(4): You must protect any completely buried metallic storage tank installed on or after January 10, 1974 from corrosion by coatings or cathodic protection compatible with local soil conditions. You must regularly leak test such completely buried metallic storage tanks. No buried metallic tanks are present at Swift; therefore, this section is not applicable. 142