The word “potential” is defined by Merriam-Webster as:
existing in possibility : capable of development into actuality
In OSHA’s PRCS standards (both 1910 and 1926 versions) it uses the word “potential” when talking about atmospheric hazards; especially when we are talking about RECLASSIFYING a PRCS to a NON-PRCS using 1910.146(c)(7) or 1926.1203(g)
1926.1203(g)(1) If the permit space poses no actual or potential atmospheric hazards and if all hazards within the space are eliminated or isolated without entry into the space (unless the employer can demonstrate that doing so without entry is infeasible), the permit space may be reclassified as a non-permit confined space for as long as the non-atmospheric hazards remain eliminated or isolated;
or
1910.146(c)(7)(i) If the permit space poses no actual or potential atmospheric hazards and if all hazards within the space are eliminated without entry into the space, the permit space may be reclassified as a non-permit confined space for as long as the non-atmospheric hazards remain eliminated.
So the question is… when do we say there is NO LONGER a “potential” for a hazardous atmosphere inside the space?
