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TM 9-2330-272-14
4-64. PURGING TANK (Con’t).
b. DRAINING TANK
WARNING
l Do NOT perform draining operations in an electrical storm or if a storm is
threatening. Keep open flames or other sources of ignition, such as welding and
cutting torches and ordinary electrical equipment, away from area where draining
operation is in progress. Sufficient fire extinguishers MUST represent and manned.
Failure to follow this warning will result in serious injury or death to personnel.
. Connect bonding and grounding connection before beginning draining operations.
Maintain bonding and grounding connection until after all draining is completed.
Connections must be made to clean, unpainted surfaces. An unbended and
ungrounded or improperly bonded and grounded semitrailer could produce a spark.
The resulting explosion will cause serious injury or death to personnel.
l Personnel engaged in draining operations must not wear wool, nylon, silk, rayon, or
other clothing that generates static electricity. Wear clean cotton clothing with no
metal zippers, Remove all contents from pockets. Wear rubber boots and gloves to
keep fuel off skin. Use cotton cloths for cleaning purposes. Before climbing onto
semitrailer, grasp static ground wire to discharge all static from body.
. Give IMMEDIATE medical attention to personnel exposed to hydrocarbon or toxic
vapors. Signs of distress are weakness, nausea, coughing or intoxication,
nosebleed or cramps, or other unusual symptoms. Qualified personnel able to
administer artificial respiration and simple first aid must be present.
1. Park semitrailer 100 ft (30.5 m) from any building, source of ignition, or sewer system Close all windows and
doors of nearby buildings to prevent flow of vapors into areas where flame and other sources of ignition may
exist.
2. Uncouple smeitrailer form towing vehicle (para 2-12)
3. Connect bonding and grounding connections (para 2-13).
4. Place sufficient fire extinguishers 50 ft (15.25m) upwind and attend with qualified personnel.
5. Place drain pans under all drain points. Ground drain pans to tank and to tank's common ground. Grounding
conections shall be made to clean, unpainted surfaces.
CAUTION
Meters should be air dried thoroughly to eliminate rusting of internal moving park.
6. Completely drain tank interior, all piping, and pump. On M131A4C and M131A5C, completely drain meter and
filter-separator. Remove all accessory items, such as gages and floats, which might entrap fuel. Drain the
equipment that has been removed. Wiupe dry all connections.
7. Wipe dry all spilled fuel. Wash, dry, and store any cloths or mops used, or dispose of them in accordance with
local policy.
4-131
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