Sources of ignition:
(1) open flame
(2) electrical devices
(3) static electricity
(4) spark
(5) heat source
All smoking materials should be extinguished well away from the site. No matches, lighters or ignition sources should be used.
The worker should remove cell phone, beeper and any electrical device that has not been sealed for explosive environments. All electricity to the area should be shut off.
Static electricity can be problem, especially in hot, dry weather. Special clothing and shoe coverings can reduce development of a static charge.
Spark can be reduced by:
(1) use of special nonsparking tools (do not generate sparks when struck against ferrous metals)
(2) shoes without metal nails
Special nonsparking tools may include shovels, hammers, wrenches, etc. They may be made of:
(1) beryllium copper: when a strong tool is needed
(2) polypropylene: resists corrosive chemicals
Fire retardant material (water, foam, atmosphere) can help minimize the risk.
In addition the worker may require:
(1) respirator or self-contained breathing unit
(2) eye protection
(3) gloves
