TM 9-2330-384-14&P
4-72. PRECHECK SYSTEM MAINTENANCE (Con't).
WARNING
When working inside tank, always provide adequate forced air ventilation
l
at the manhole opening with air directed into compartment where work
is being performed. Forced air ventilation allows for removal of any ex-
plosive quantities and contaminants resulting from the type of work be-
ing done, and serves to prevent oxygen deficiency. Failure to follow this
warning may result in death to personnel.
NEVER work alone inside a tank; a second person must be stationed at
l
the manhole opening. The person inside the tank must have a safety line
and harness on in case of emergency for rescue operations. In the event
a rescue operation is required, summon assistance IMMEDIATELY. DO
NOT attempt a rescue until assistance has arrived.
(25) From inside tank, disconnect tubing (21) from jet level sensor (see paragraph 4-70).
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