Notwithstanding the provisions of Sec. 50-204.24:
(a) A room or area is not required to be posted with a caution sign
because of the presence of a sealed source, provided the radiation level
12 inches from the surface of the source container or housing does not
exceed 5 millirem per hour.
(b) Rooms or other areas in on-site medical facilities are not
required to be posted with caution signs because of the presence of
patients containing radioactive material, provided that there are
personnel in attendance who shall take the precautions necessary to
prevent the exposure of any individual to radiation or radioactive
material in excess of the limits established in the provisions of this
subpart.
(c) Caution signs are not required to be posted at areas or rooms
containing radioactive materials for periods of less than 8 hours:
Provided, That (1) the materials are constantly attended during such
periods by an individual who shall take the precautions necessary to
prevent the exposure of any individual to radiation or radioactive
materials in excess of the limits established in the provisions of this
subpart; and (2) such area or room is subject to the employer's control.
