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i i Table D — Potential Equipment Failures Potential Equipment Maximum Volume Maximum Spill Rate Failure Spill Direction Released (gallons per minute) (gallons) To site surface: Should be Overfill of customer 40 40(trucks) vehicle in dispensing ! contained by spill p g area absorbent 10 10 (passenger) Pipe failure To secondary 50 5 containment Leaking pipe or valve To secondary packing containment 50 1 Tank truck leak To roll-over berm 50 5 Hose leak during truck Ibadin To roll-over berm 10 1 I DEMONSTRATION OF PRACTICABILITY (40 CFR:112/.7Facility management has determined that use of the contait controls and diversionary structures and I materials and readily available equipment to prevent dis <gedoduct from reaching navigable waters is practical and effective at this facility FACILITY DRAINAGE (40 CFR 112.8(b)) I Containment Area Drainage from the concrete berm surrounding tanks T- •ough AST-4 is two holes located in the northeast corner of the containment berm wall. Drainage from the holes flows into a storm drain inlet located in the parking area to the north of the containment area. The holes in the berm wall do not have valves to prevent rainwater or product from flowing from the berm. Additionally,there is a portion of the berm wall near the pump th,/s not continuous which would allow product to leave the berm in the event of a release.Apex recommends installing valves on the drain holes and completing the berm wall near the pump to prevent product from flowing out of the berm in the event of a release. The SPCC Plan must be amended following the installation or modification of any secondary containment structure. When a valve is installed, the valve must be kept in the closed position, except when draining the secondary containment berms. The content of the secondary containment berms must be inspected by facility personnel prior to draining to ensure that only oil-free water is allowed to enter the facility storm water drainage system. After the inspection verifies that only oil-free water will be released,the bypass valve will be opened and the accumulated water will be released under direct and continuous supervision. Drainage events are recorded in the log included in Attachment B to this SPCC Plan and must be kept with the Plan for at least 3 years. In the event that water containing oil is present in any of the containment berms,the cleanup contractor (PERS Environmental) must be contacted immediately to remove the contaminated accumulation. The Joe's Travel Plaza 15600 Harlan Road,Lathrop,CA Page 16