Home Buyer's and Seller's Guide to Radon is a publication by the Environmental Protection Agency. Used with permission under public domain and creative commons. Usage: Category Education; License: Creative Commons Attribution license (reuse allowed)
On this page: c. Preventing or Detecting Test Interference
There is a potential for test interference in real estate transactions. There are several ways to prevent or detect test interference: Use a test device that frequently records radon or decay product levels to detect unusual swings; Employ a motion detector to determine whether the test device has been moved or if testing conditions have changed; Use a proximity detector to reveal the presence of people in the room which may correlate to possible changes in radon levels during the test; Record the barometric pressure to identify weather conditions which may have affected the test; Record the temperature to help assess whether doors and windows have been opened; Apply tamper-proof seals to windows to ensure closed house conditions; and Have the seller/occupant sign a non-interference agreement.
Home buyers and sellers should consult a qualified radon test provider about the use of these precautions.