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Areas with potentially explosive atmosphere include fuelling
areas, below decks on boats, fuel or chemical transfer or
storage facilities, and areas where the air contains chemicals or
particles, such as grain, dust, or metal powders.
Blasting caps and areas
Power off your mobile phone or wireless device when in a
blasting area or in areas where signs are posted to power off
“two-way radios” or “electronic devices” to avoid interfering
with blasting operations.