The 289 area code was created as an area code overlay for the Mississauga (Streetsville) area. Unlike the previous solutions, this process did not require the place to be geographically separated by different area codes.
Ionizing radiation is a term used for radiation whose quanta have energy to directly or indirectly ionize (one or more electrons are released from the atom of the given substance) molecules or atoms while passing through matter, hence the name ionizing radiation.
In no case shall a minor be permitted to receive a radiation dose in excess of 10 percent of the limits set forth in Paragraph 2 of this section. Also, the dose to an embryo/fetus (for purposes of regulations are considered a minor) due to the occupational exposure of a declared pregnant woman shall not exceed 0.5 rem (5 mSv) during the entire pregnancy. Occupational Exposure to Pregnant Women. Obviously, not all radiation workers may become pregnant.