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I Structures Buildings currently in place at the facility include a gate building and maintenance building.The gate building serves as the facility administrative office building as well as the main checkpoint for trucks entering or leaving the facility. The maintenance building serves as a general yard equipment maintenance facility and provides some storage for small equipment parts. The other significant on-site structure is a 120'tali,free standing lattice wireless communications tower.The tower facilitates two types of communication; in-yard communication between the gate :"building and truck drivers,and communication between yard personnel and incoming trains. On-Site DrainaLe Approximately 70%of the existing facility is paved with concrete.A system of open channels and enclosed pipes conveys storm runoff to several on-site detention and retention basins which attenuate or retain the site storm runoff. Union Pacific previously entered into, and maintains an agreement with the South San Joaquin Irrigation District (SSJID)which allows the facility to discharge runoff from its detention basins into the French Camp Outlet Canal (FCOC)when the water level in the canal is below a certain elevation. The discharge is controlled by pumps in conjunction with water surface level monitoring devices. Industrial Waste Stormwater Runoff Treatment Runoff from maintenance areas which are likely to contain oil and/or sediment is directed to an on-site waste water recycling system. This system separates oil and sediment from the water.The gray water is then stored in a tank and used to wash vehicles and equipment before finally being discharged into one of two large evaporation basins.The areas that currently contribute waste to the recycling system include the crane maintenance pad,the maintenance shop,the diesel fuel storage area, and the fueling and fuel pump areas. In addition, oily waste collected at two on-site compressed air stations is manually transported to the recycling system for disposal. Collected petroleum and sediments are disposed of offsite at approved locations. Utilities Currently,one septic tankfand leach field serves the Gate Building and Maintenance Building. Site water and fire protection are provided via two connections to a City of Lathrop water main lying between the facility and the Sharp Army Depot. Site electricity is provided by Pacific Gas&Electric. Natural gas is not available on site. Petroleum Product Stora e Three storage tanks are located near the maintenance building at the south end of the facility. The three tanks include a 500 gallon gasoline tank, a 10,000 gallon diesel tank, and a 400 gallon used oil tank.All of the tanks are above-ground tanks and have concrete curbed areas for secondary containment. Other Facilities Service and maintenance facilities other than the maintenance shop include a hostler fueling island and a crane service pad.When a gantry crane is due for routine maintenance or needs to be repaired,the crane is parked on the service pad, where the maintenance is performed. Typical maintenance activities include oil changes, lubrication, and washing of the cranes, The crane pad and fueling islands are surrounded by drivable curbs which provide secondary containment,so that spills and stormwater falling on the pad are directed to the waste water recycling system. Runoff and spills from the hostler fueling island containment area are also directed to the waste water treatment system. 3