Section 325.5228. Airborne radioactivity area signs.

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Rule 228. (1) As used in this rule, “airborne radioactivity area” means a room, enclosure or operating area in which airborne radioactive material exists in concentrations in excess of the amounts specified in column 1, table I of rules 261 to 269 or a room, enclosure or operating area in which airborne radioactive material exists in concentrations which, averaged over the number of hours in any week during which individuals are in the area, exceed 25% of the amounts specified in column 1, table I of rules 261 to 269.

(2) Each airborne radioactivity area shall be conspicuously posted with 1 or more signs bearing the radiation caution symbol and the words:

History: 1954 ACS 85, Eff. Dec. 3, 1975.

                    
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