A permit-required confined space (PRCS) may be reclassified as a non-permit space under the following conditions as outlined in 1926.1203(g):
There is no actual or potential atmospheric hazard within the space.
This means that there are no atmospheric hazards in the space, and none will develop during the entry period. Use of forced air ventilation to control atmospheric hazards is not considered the elimination of the hazard. See standard interpretation.
