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SPCC Plan — Williams Tank Lines - Stockton, CA Uc3a l c(oc�� t0'� Prevention Systems 40 CFR 112.7(c) The following means have been evaluated for the containment or diversion of a potential discharge. At a minimum one of the following prevention systems or its equivalence must be used. For onshore facilities: a. Dikes, berms, retaining wall, containment area sufficiently impervious to contain the product (40 CFR 112.7 (c)(1)(i)) b. Curbing (40 CFR 112.7(c)(1)(ii)) c. Culverts, gutters and other drainage systems (40 CFR 112.7(c)(1)(iii)) d. Weirs, booms or other barriers (40 CFR 112.7(c)(1)(iv)) e. Spill diversion ponds (40 CFR 112.7(c)(1)(v)) f. Retention ponds (40 CFR 112.7(c)(1)(vi)) g. Sorbent materials (40 CFR 112.7(c)(1)(vii)) The facility makes use of a cement floor, concrete walls, tanks on concrete, and control valves for their containment area holding their 12,000 gallon #2 Diesel fuel tank. The waste oil containment consists of two X20 gallon IBC totes securely located on a steel spill pallet that has the capacity to hold the entire volume of both IBC totes. The facility's diesel retained trans-mix product is stored in a 240 gallon single wall steel UL 142 tank that is securely located inside a containment pan. Key facility staff is trained for spill prevention and spill clean-up. The facility is inspected monthly for visible signs of troubles, and recorded in their SPCC Plan. Absorbent materials are on site and readily available for use. The underground drain leading to the three part oil/water separator tank located next to the IBC tote storage area of the facility. The area can contain any liquid drainage that occurs from the truck shop and aboveground tank area. The three part oil/water separator is the last stop for discharge, spills, drainage or precipitation from the facility. The 12,000 gallon #2 Diesel fuel oil product tank located outside is a UL 142 single wall steel protected by a concrete and cement block wall. No fuel or oil product leak is expected from this tank and if a containment failure were to occur the containment wall has the capacity to hold the entire contents of the fuel oil product tank. In the event that oil products are discharged into the underground three part oil/water separator the liquids will be disposed of, if needed. Any discharge or spill will be monitored by Williams Tank Lines management to ensure that safety is addressed and that all waste is contained, transported and disposed of in a proper manner. Any and all discharges of oil products will be reported to the Regional Authority (RA) San Joaquin County Environmental Health Division — 209 —468-3420 and the San Joaquin County OES - 209-953-6200. George W.Lowry Oil,Inc. 24 Environmental Services Division 2010