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It is estimated that in Quebec about 10% of deaths from lung cancer are associated with exposure to radon.
Canadian Cancer Statistics - 2009
Radon is a radioactive gas that comes from the decay of uranium in the earth's crust. It is present everywhere on the globe although its issuance and therefore its concentration are not uniform. Radon can seep into buildings primarily through cracks and other entry-level base paths.
Radon is odorless, colorless and tasteless. It is therefore impossible to detect by the senses.
Measurement unit of radon is the becquerel per cubic meter (Bq/m3). A becquerel is a disintegration of an atomic nucleus per second.
Health Canada recommendations:
- Must take corrective action when the annual average radon concentration exceeds 200 Bq / m³ in the normal occupancy of a building.
- More radon concentrations are high, more action is needed quickly.
- Where corrective measures are taken, the radon level should be reduced to the lowest level reasonably achievable.
- The construction of new buildings should be using techniques that will minimize radon entry and facilitate the elimination of post-construction radon, should it be necessary thereafter.