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VL CONT. AND/OR DIVERSIONARY STRUCTURES [112.7(c)] Area 1 - Repair Tra k: Local topographic lows serve as containment for the majority of the repair track area. Sections VIII 4nd IX discuss information regarding containment and diversionary structures. Area 2 - Se aratio Plant: The separation plant area slopes down to the oil trap, where accumulated liquids are recycled through the separation plant. Drainage beneath sludge tank cars is contained by a drainage grate and d Irected back to the separation plant. Outside the tracks, flow is contained within local topographic lows, and by absorbent materials stored at the separation plant. Area 3 - Diesel Stoi a e: A containment with a volume greater than the total volume of Tank No. 6 is located in this area. C oncrete pads with drainage beneath the pump skids and diesel truck load and unload spots contain oil spi led during purging processes. The drainage is directed to the separation plant. Area 4 - Diesel Shop: Drip pans and service pits are used to contain oil spills during engine servicing. Lube oil tanks (Nos. 11 and 12) have concrete containments around them. The Drain Sump (T) north of the diesel shop building drains to the separation plant. VII. OTHER SPILL CONTROL, MEASURES [111.7(d)] 40 CFR Part 109 (nit applicable). VUL FACILITY DRAINAGE [112.7(e)(1)] Undiked oil use area at the yard drain to the separation plant through the yard drainage system or to local topographic lows. D ainage along the tracks in Area 1 is locally contained. Drainage within Are# 2 is by overland flow back to the oil trap. Drainage in the containment around Tank No. 6 in Area 3 is drected to the separation plant through a manually activated pump in the floor of the containment. The majority of the diesel shop area drains into the yard drainage system toward the separation plant. Drainage entering the yard system flows by gravity to the 5,000 -gallon drain sump (T) north of the diesel shop area. A float g uge automatically activates the sump pump (U) to pump the accumulated liquids through a stainless steel pipe to the separation plant. Some drainage on the southeast side of the shop building flows to the local low sump (V) and is also directed to the separation plant. Drainage at the plant is directed to the oil rap and oil is skimmed off and pumped into the waste oil tank (No. 9). Waste water and oil are pumped through the main process pumps (C) to system treatment. Sludge is removed and drained by gravity t the sludge tank (No. 3) and then pumped (D) to tank cars for removal through the sludge load spot (E). IX. BULK STOI�AGE TANKS [112.7(e)(2)] Above ground bulk (storage tanks and secondary containment are summarized in Table 3. Secondary containment generall restricts flow from reaching navigable waterways. Spill Prevention C�ntrol and Countermeasure Plan: Stockton Page 7