1-17. SAFETY REGULATIONS (Con't).
Cut with acetylene torch or chisel and hammer.
(5) Drill (except aluminum).
h. Follow these rules if working inside a purged tank:
Always provide adequate forced air ventilation with air directed inside to compartment
where work is being performed.
NEVER work alone inside a tank; a second person must be stationed at the manhole
opening. The person inside the tank must have a safety line and harness on in case of
emergency for rescue operations.
If the person inside the tank encounters any difficulties, the person stationed at the
manhole must summon assistance IMMEDIATELY. DO NOT attempt a rescue until
assistance has arrived.