XIII. Labeling and Posting Requirements

A.        All areas, items, or containers within Restricted Areas will be posted with appropriate warning signs or labels as defined by S.C. DHEC Title-A Radioactive Materials Regulation 61-63.

1. Restricted Area

Any area to which access is controlled by the licensee for purposes of protection of individuals from exposure to radiation and rad materials.

2. Radioactive Materials Area

At a minimum, the entrance doors to rooms and laboratories in which radioactive materials are stored or used will be posted with a yellow and magenta sign bearing the radiation trifoil and the words "CAUTION-RADIOACTIVE MATERIALS". 

3. Radiation Area

A radiation area is any area where there exist dose rates such that a major portion of the body could receive a dose of 2 millirem in any one hour.  Dose rates of > 2 mR/hr but <100 mR/hr require posting as a RADIATION AREA.  The dose rate at the boundary of a radiation area may not exceed 2 mR/hr.  The posting of equipment as a radiation area will be based on a dose rate of 2 mR/hr measured at a distance of 12" from the source.

4. High Radiation Area

Any area where there exist dose rates such that a major portion of the body could receive a dose of 100 millirem in any one hour will constitute a HIGH RADIATION AREA.  Dose rates of >100 mR/hr, but <1000 mR/hr require posting as a HIGH RADIATION AREA.  The dose rate at the boundary of a high radiation area shall not exceed 100 mR/hr.  The posting of equipment as a high radiation area may be based on a reading of 100 mR/hr when measured at a distance of no more than 12". 

5. Airborne Radioactivity Area

Any room, enclosure or operating area where airborne radioactivity is in excess of 20% of the amounts specified in S.C. DHEC Title A RHA 3.53 Appendix B, Table I Column 

6. Contaminated Area

Any area with removable surface contamination >200 dpm/100 cm2 beta / gamma or >20 dpm / 100 cm2 alpha

7. Additional Postings

DHEC Form RHA-20, Notice to Employees and the DHEC "Emergency Radiological Assistance" Form will be posted in a highly visible location within the lab or use area.