MIL-HDBK-1028/3
sanitary systems where Otto fuel exists.
Use trench/sump system and contain
spills inside the shop areas.
f) An emergency eyewash and shower fixture in areas where the
possibility of exposure to Otto fuel exists,
5.4.3.2
Station Responsibility. In EPA/state regulated areas, a Hazardous
Waste Part B permit must be obtained prior to tank installation. Obtaining
this permit is sometimes a lengthy process. It is recommended that the
designer contact the appropriate station personnel early in the design
process to ensure the permit application process has begun.
5.4.4
Compressed Air. Compressed air shall be provided in accordance
with NAVFAC DM-3.05. Specifically provide the following:
a) Low pressure compressed air as described in para. 2.3.4.
b) High pressure oil-free compressed air at 1,000 psi (20,684
kPa) to Shop No. 1 and No. 2. Dryers and filters shall be specified to
assure a clean and dry air supply. High-pressure nitrogen may be provided in
lieu of air.
5.4.5
Noise and Vibration Control. All mechanical systems and equipment
shall be designed to limit noise and vibration in accordance with NAVFAC
DM-3.1O.
5.5
Otto Fuel II Requirements
5.5.1
General. The MK-46 and MK-48 torpedoes are propelled by a very
toxic and highly volatile Otto fuel II. The fuel contains propylene glycol
dinitrate (PGDN) as the major constituent, representing approximately 75
percent of the total fuel. PGDN has been found to be a health hazard at
relatively low concentrations in air. During the maintenance cycle of the
torpedo, the fuel cell system, which contains Otto fuel II, must be defueled
before disassembly and refueled after assembly. This work is done in the so
called "Dirty Areas" of the facility which include the Fuel Tank Turnaround
and the Afterbody Breakdown Rooms. During the defueling and refueling
operations, the operators are exposed to the fumes of the toxic Otto fuels.
NAVMEDCOM INSTRUCTION 6270.1, Health Hazards of Otto Fuel II, requires that
personnel exposure be limited to those levels in the most current Threshold
Limit Value-Time Weighted Average (TLV-TWA) tables for PGDN as listed in
American Conference of Governmental Industrial Hygienists (ACGIH), Threshold
Limit Values for Chemical Substances in the Work Environment. The TWA
concept refers to a usual 8-hour workday and 40-hour workweek. The current
ACGIH publication lists the TLV-TWA as 0.05 parts per million (ppm) or 0.3
milligrams per cubic meter (mg/m3). Consult the latest edition for limits in
force at time of design.
Fuel Tank Turnaround/Afterbodv Breakdown Rooms Layout. A certain
5.5.2
configuration and size must be considered to accommodate the workload and the
ventilation. Within these rooms, the location of fuel tank breakdown bench,
parts washers, floor hood (or ventilator), etc., is vital to the proper
operation of the ventilation system. The layout should allow all
contaminated parts to be in a controlled area at all times. Thus, the
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