Updated: March 2023
Standard Operating Procedures:
- A permit holder who wishes to delete a laboratory from the permit, must ensure that:
- all signs and labels have been removed from the laboratory
- the laboratory rules have been removed
- all waste containers have been removed (contact Environmental Protection Services for disposal and removal of waste).
- all radioactive substances have been removed
- the radiation field is measured with a survey instrument and compared to the background radiation
- if the radiation field is above background, the source of the radiation must be determined and removed or cleaned until the radiation field is equal to the background radiation level
- swipe samples are taken with filter paper covering a minimum of 100 cm2 in various locations
- swipe samples are counted by a Liquid Scintillation Counter with the energy windows wide open
- if any samples indicate an activity greater than 0.5 Bq/cm2, the area must be decontaminated/cleaned
- submit a written notice to the Radiation Protection Service (RPS, fax 416.971.1361, or by e-mail to Vanieshree Ranganathan).
- In the absence of the PH (retired/left the University), the Department is responsible for all of the above.
- After receiving notice from the Permit Holder/Department a Health and Safety Officer (HSO) will visit the laboratory. The HSO will audit all of the above and complete the “Laboratory Decommissioning Report.”
- The HSO will submit a report to the Designated Radiation Safety Officer, who will approve the Permit revision and/or archive the Permit.
- All of the related paperwork will be filed and stored for three years by the RPS.