Where fast response is essential, such as for a real estate transaction, a two day test will normally determine whether or not the house meets the Health Canada radon guideline of 200 Bq/m³ guidelines.

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By burying LLT E-PERM detectors (with an "L" chamber and Long-Term electret) in water-resistant enclosures, you can measure the radon activity in the soil at sampling points in a tract of land.

Radon-Emanating Radium from Soil and building Materials

It is well known that the main source of indoor radon is the soil upon which the building is constructed and to some extent upon the building materials. By enclosing a known amount of the material in a radon leaktight container and measuring the radon concentration over a period of time using an E-PERM radon monitor, it is possible to measure the radon-emanating radium concentration of the material. The same container used for making radon in water measurements may be used for this application.

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