phase, three-wire, 20 amperes, duplex convenience outlets in
each area of the facility (minimum six outlets). Two-way
switching is preferred to control lighting in the H-70 fuel
drum storage area from the H-70 fuel tank servicing area.
Provide explosion proof, Class I, Division 2, Group C
b) Provide 15 gpm (1.0 L/s) hose bibb water outlets
with backflow prevention. Size hose bibb for standard lawn
hose connections. Locate the hose bibb to provide water to
service stand on the inside of the exterior wall, on the
center of the servicing trench, about 2.5 feet
(0.8 m) above the finished floor (below the 4-inch (100 mm)
pipe sleeve). Water with a reduced pressure-type backflow
preventor will also be required for the fire suppression
a) Segregate mechanical ventilation for regulated
versus non-regulated areas. Exhaust regulated areas through a
common manifold. Evaluate the need for an air pollution
state, or federal emissions criteria applicable to the
b) Design ventilation systems for regulated areas to
maintain a negative pressure of 0.05 to 0.1 inches of water
(12 to 25 Pa) with respect to adjacent non-regulated areas.
c) Design ventilation for servicing and storage
areas to provide a minimum of 20 air changes per hour.
d) Design the ventilation system for automatic
shutdown in the event of a fire within the facility.
e) Use flexible exhaust vent of the "elephant trunk"
type to exhaust vapors that are released when full hydrazine
drums are opened. Design for air flow at the vent nozzle to
be approximately 150 cfm (71 L/s). Refer to American
Conference of Governmental Industrial Hygienists (ACGIH),
Design of Industrial Ventilation Systems.