§422.APPENDIX B. Recommended Testing Strategy for Measurements in Buildings Involved in Real Estate Transactions

The first step is to perform a short-term measurement* in the lowest structural areas**.

 

Perform a Short-Term Test The minimum length of a short-term test shall be 48 hours.
There are 2 methods that may be used for short-term testing during a Real Estate transaction.     (1)  Simultaneous Tests – Two short-term tests set side by side conducted simultaneously. (2)  Continuous Monitor Testing – A Continuous Monitor that measures in hourly increments.
	If the result is less than 4.0 pCi/L				If the result is 4.0 pCi/L or more
	No further action is required.  Retest in two years or if any renovations or additions are made to the building.				Fix the home.

 

*          Short-term tests may last between 2 and 90 days, most last between 2 and 7 days.  Tests between seven and 90 days are usually impractical for real estate transactions but are fine for homeowners assessing their own radon situation.  Examples of short-term detectors used in home environment testing include:  activated charcoal canisters, charcoal liquid scintillation vials, electret chambers and continuous monitors.

 

**        Conduct a short-term test in each of the lowest structural areas suitable for occupancy in the home.  For example, if the home is a split-level building with one or more foundation types:  test in the basement, in a room over the crawlspace and in a slab-on-grade room.  In accordance with this protocol, measurement professionals are required to test in each of the foundation types.

 

(Source:  Amended at 33 Ill. Reg. 14479, effective October 9, 2009)