Section 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**.

*          Short-term tests may last between 2 and 90 days, most last between 2 and 7 days.  Tests between 7 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, 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 licensees are required to test in each of the foundation types.

(Source:  Amended at 29 Ill. Reg. 3212, effective February 22, 2005)