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Commerce Mechanical Facility
Commerce, California

This facility is a major refueling and locomotive service depot for the Burlington Northern and Santa Fe Railway Company (BNSF) in the Los Angeles area. The facility has the capability of supplying fuel, compressor oil, lube oil; journal oil, water, and traction sand to two six-locomotive consists in a 30-minute period. Also included were truck and rail car loading and unloading systems with elevated safety platforms for unloading diesel fuel and lube oil and loading waste oil. Double wall, direct buried transfer piping supplied diesel fuel and lube oil to the fueling platform. All systems are designed for a Zone 4 seismic region.

A dump station is also included for the sanitary waste disposal wagon. All of the piping on the fueling platform is carried in trenches in order to minimize obstructions while maintaining accessibility. The entire fueling platform and ready tracks were provided with an HDPE secondary containment membrane. Complete systems to supply diesel fuel, lube oil, compressor oil, journal oil, water, and compressed air were provided.

The traction sand system is capable of sanding all six locomotives at one time. Pneumatic conveying systems are used to move sand from the bulk silo to the transporters and to convey sand to each locomotive. The sanding system is designed to stop automatically when each sanding box is filled.

The diesel fuel storage tank farm included three 750,000-gallon double bottom storage tanks with internal floating roofs. Pipeline fill, custody transfer, and tank AFFF fire protection piping is provided to serve the tank farm. A locomotive retention tank waste system consisting of collection system, air diaphragm transfer pumps, and an oil/water separator was provided to remove free oil from the locomotive retention tank waste before disposal in the wastewater treatment facility. A gasoline fueling station for company vehicles was also provided.

This project also included the design of an industrial wastewater treatment plant for the fueling/maintenance yard. Plant processes included a lift station, stormwater storage tank, API oil/water separator, dissolved air flotation separator (DAF), grit remover, surge tanks, sludge holding tank, sludge loading, emulsion breaker feed system, sulfide treatment system, polymer blend system, operating controls, and all associated pumps, piping, and miscellaneous equipment. The stormwater storage tank has capacity to hold the runoff from all contained areas for a 100-year, 24-hour storm event.

The electrical design for these facilities included building power and lighting, and process controls for all of the facilities designed under this project. A Programmable Logic Controller (PLC) controls all fueling platform operations. The platform lighting system utilized a series of mast arm poles similar to traffic signals. These poles position the light fixtures beyond the locomotives to light the narrow aisle between locomotives without obstructing access.