The values listed below are specified in the Atomic Energy Commission's Regulation 10 CFR Part 20 "Standards For Protection Against Radiation". Also, the values listed are consistent with those specified in the "Rules and Regulations To Control Radiation Hazards" of the Massachusetts Department of Public Health.

Maximum Permissible Doses for Radiation Workers:

Except as provided in Paragraph b, radiation doses shall not exceed the following:

Annual rem limit

• Deep-dose equivalent (external exposure whole body) 50
• Eye-dose equivalent (external exposure to lens of the eye) 15
• Shallow-dose equivalent (external exposure to skin or an extremity) 50
• Effective dose equivalent (exposure to organs) 5

An individual may exceed "a .1." provided that it is authorized by the Radiation Safety Officer and that:

• During any calendar quarter his whole body dose from all sources of radiation does not exceed 3 rems; and
• The accumulated occupational dose does not exceed 5(N 18) rem, where nNn equals age in years at the individual's last birthday; and
• There is on file an appropriate record (as specified in 10 CFR 20, section 20.101) of the individual's accumulatet occupational whole body dose.

Maximum Permissible Doses for Minors, and Non-Radiation Workers:

One tenth of values listed in I.a.