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Union Pacific Railroad Report on CA, Stockton CA, Stockton Facilities http:i/www. home.uprr.com/depts/EnvMgmt/CepsicfnvReports/Info_Print.cfm Facility Documents for IW -1 Waste Water Plant Name: IW -1 W4te Water Plant Abbr: IW -1 Type: Environmental Management Desc: IW -1 is a industrial waste water pretreatment plant which processe,wastewater prior to discharge to the City of Stockton sanitary s wer. MP Start: 92 Lat: SbDv: Canyon MP End: 92 Long: MoW Nbr: Water Address: Waste Plant Union Pacific Railroad Company 833 East 8th Street City: Stockton County: San Joaquin St: CA Phone: 209-942-5224 Fax: 209-942-5276 Postal: 95206 209-942-358 Country: USA Petroleum Use Petroleu containing waste water from the Car Shop(VM-5), UPFE Desc: Shop(VM-6), Diesel Storage(AST-6), and the Diesel Shop areas(VM'I-1,2,3 & 4) is processed to remove the oil. The recovered oils are accumulated in the Waste Oil Storage Tank(AST-9) for shipment to the approved used oil recycling facility. Activities Waste water from the shops is continuously processed for free oil Desc: and solid in the Primary Clarifier. Thewater is then put into storage in the 8800 gal Retention Tank(AST-5). Water from AST -5 is batch tre ted and discharged only when the Plant Operator is on duty. The batch treatment process has a clarifier for emulsified oil removalnd a dissolved air flotation urrit. Cationic and anionic polynmer are used to enhance the flotation of the waste. Sludge accumul ted in AST -3 is pumped through the sludge load spots to tank cars on the sludge load track. Drainage in the area of the sludge to d spot and the sludge load track is either contained in local topographic lows or flows into drain grates along the track and back tot the separation plant. Maximum spill from the sludge loading process would be 3,000 gallons, the volume of the sludge tank (No. 3). Waste oil is transferred from Tank No. 9 through the waste oil load spot into a tank truck. Flow from the load zone area is back into the local topographic lows or into the Area Sump of the WWTP. Access Route There are two available routes for vehicles. Either south from the Desc: 3rd Stree entrance or north from the 8th Street entrance. Flow Desc: Most of tie yard surface runoff is contained within the yard limits. Flow within the area of the separation plant is directed back to the oil trap for recycling. Flow in Area 3 - Diesel Storage is directed to the oil/water separator for recycling. The drains in the containment around Tank No. 6 are normally closed. The drain at the pump skid, Truck Unload Spot, routes flow to the oil/water separator. Most of the flow in the diesel shop area (Area 4) is into drip pans and directed to the separation plant through the facility drainage system, or contained in local topographic lows_ Flow from the lube oil tanks would be contained in a concrete basin. Flow from the lube oil unload spot would be into the yard drainage system to the separation plant.