Radon Assessment

Determination of radon progeny concentration in the workplace

Radon Assessment Information Sheet

Radon is a colorless and odorless noble gas that occurs as a result of the decay of Radium-226. Radon is considered a significant contaminant that affects air quality in underground mines. Epidemiological studies show that miners exposed to elevated levels of radon progeny have an increased risk of developing lung cancer. To eliminate the risk of developing lung cancer, the assessment of radon progeny concentration in the workplace must be a priority.

Radon Assessment

The Workplace Safety North (WSN) Radon Assessment process follows the sampling protocol of the Ministry of Labour, Immigration, Training and Skills Development Guideline R.S. 289, Radon Progeny - Sampling. Sampling will be taken at areas where the highest radon progeny concentrations are expected and where worker exposure may be an issue. Such locations may include:

  • Sumps (radon gas can be carried into the mine with water)

  • Unventilated areas (to detect if gas is emanating from the host rock)

  • Active headings and old workings being re-opened

  • Exhaust airway (to determine if any gas is being produced in areas not otherwise tested)

Following the radon survey, WSN issues a written report to the firm containing a detailed analysis of the radon progeny concentrations.


Costs are dependent on the scope of the assessment. WSN is a not-for-profit organization; fees are set to cover the costs of consumables, travel, hotel accommodation and administrative time for report writing.