(2) An engine exhaust system connected to the exterior of the
facility with an exterior muffler. Configure the exhaust system to prevent
rainwater or condensation from entering the engine manifold.
Adequate engine cooling by a radiator duct or externally
Consider a premanufactured building to house an indoor generator.
See Figure 5. Consider an outdoor unit in mild climate conditions. Consider
a below ground generator vault for units which shall be sited within airfield
Emergency Generator Fuel Storage. Design fuel storage for diesel or
jet fuel powered generators in accordance with NAVFAC DM-22, Petroleum Fuel
Facilities, state and local regulations, and the following:
a) Above Ground Storage Tanks: Title 40, CFR Part 112, Oil
Pollution Prevention; Title 40, CFR Part 113, Liability Limits for Small
Onshore Storage Facilities, Subpart A, Oil Storage Facilities; and Title 40,
CFR Part 114, Civil Penalties for Violation of Oil Pollution Prevention
b) Underground Storage Tanks:
Title 40, CFR Part 280, Underground
Storage Tanks Technical Requirements.
Provide fuel storage capacity for 24 hours of continuous generator operation.
Provide separation between fuel storage tanks and adjacent buildings, parking
aprons, and property lines in accordance with NAVFAC DM-22. Provide double
wall storage tanks and piping.
Uninterrupted Power Supply (UPS). Provide an UPS in electronic
facilities and air traffic control installations for critical technical loads
and the specific requirements of the ordering authority. The UPS will be
government furnished. Install the UPS in accordance with MIL-HDBK-1004/1,
Electrical Engineering - Preliminary Design Considerations and
400-Hertz (Hz) Power. When required by the ordering authority,
provide 400-Hz solid state converter in accordance with NFGS-16306, 400-Hertz
(Hz) Solid State Frequency Converter. Design in accordance with
MIL-HDBK-1004/5, 400-Hz Medium-Voltage Conversion/Distribution and Low-Voltage
Utilization Systems. De-rate 400-Hz cables and locate in separate
non-magnetic raceway system. Refer to MIL-HDBK-1012/1.