A staging area is a location where equipment are assembled the Fourth of July.
  Standards and regulations exist to identify such locations, classify the hazards, and design equipment for safe use in such locations
 If equipment is marked, for example, Ex e II T4 then it is suitable for all subgroups IIA, IIB and IICA list must be drawn up of every explosive material that is on the refinery or chemical complex and included in the site plan of the classified areas

