32 Ill. Adm. Code 340.920
Posting Requirements
Section 340
Section 340.920 Posting
Requirements
a) Posting of Radiation Areas. The licensee or registrant shall
post each radiation area with a conspicuous sign or signs bearing the radiation
symbol and the words "CAUTION, RADIATION AREA".
b) Posting of High Radiation Areas. The licensee or registrant shall
post each high radiation area with a conspicuous sign or signs bearing the
radiation symbol and the words "CAUTION, HIGH RADIATION AREA" or
"DANGER, HIGH RADIATION AREA".
c) Posting of Very High Radiation Areas. The licensee or
registrant shall post each very high radiation area with a conspicuous sign or
signs bearing the radiation symbol and words "GRAVE DANGER, VERY HIGH
RADIATION AREA".
d) Posting of Airborne Radioactivity Areas. The licensee shall
post each airborne radioactivity area with a conspicuous sign or signs bearing
the radiation symbol and the words "CAUTION, AIRBORNE RADIOACTIVITY
AREA" or "DANGER, AIRBORNE RADIOACTIVITY AREA".
e) Posting of Areas or Rooms in Which Licensed Material is Used
or Stored. The licensee shall post each area or room in which there is used or
stored an amount of licensed material exceeding ten times the quantity of such
material specified in Appendix C to 10 CFR 20, effective January 1, 2004,
exclusive of subsequent amendments or editions, with a conspicuous sign or
signs bearing the radiation symbol and the words "CAUTION, RADIOACTIVE
MATERIAL(S)" or "DANGER, RADIOACTIVE MATERIAL(S)".