Code of Maine Rules
10 - DEPARTMENT OF HEALTH AND HUMAN SERVICES
144 - DEPARTMENT OF HEALTH AND HUMAN SERVICES - GENERAL
Chapter 220 - Rules Relating to Radiation Protection
Part N - REGULATION AND LICENSING OF TECHNOLOGICALLY ENHANCED NATURALLY OCCURRING RADIOACTIVE MATERIALS (TENORM)
Section 144-220-N-7 - Unrestricted use and conditional release

A. Transfer or release equipment for unrestricted use or release for unrestricted use facilities contaminated with TENORM which are not greater than the levels in Appendix A of this Part. Upon application, specific approval of alternative levels may be granted by the Agency;

B. Release land for unrestricted use where the concentration of TENORM 226Ra and 228Ra, averaged over 100 square meters, is less than 185 becquerel per kilogram (5 pCi/gm) above the background concentration, averaged over any 15 cm layer of soil below the surface, or compliance with N.5.B. through N.5.D. is demonstrated;

C. Transfer or release for conditional use in metal recycle, equipment contaminated with TENORM producing a maximum exposure level of 50 microroentgen per hour (0.5 uGy), including background radiation, at any accessible location. Recycling shall not include the processing or use of materials in a manner that constitutes disposal without specific written approval of the Agency2;

D. Transfer or conditionally release with written documentation by the licensee to a specified facility. Written documentation shall include the date, recipient name and location, description and quantity of the material, and a description of the procedures and mechanisms used to ensure that material will not be released in another manner, as an unrestricted release; or

E. Transfer equipment contaminated with TENORM in excess of levels specified in Appendix A pursuant to N.10.E.

2States may establish screening levels based on gamma survey instrument results for use in releasing facilities and equipment, consistent with N.5.