In early 1992, the EPA requested their Science Advisory Board (SAB) to review the scientific basis of the real estate testing options proposed in the original draft of Homebuyer’s and Seller’s Guide to Radon and to weigh in on methods to discourage tampering. The SAB noted that radon concentrations vary with time of day, with weather, by season, and with the occupants’ HVAC use patterns. They also recognized radon measurement methods vary in their precision, ability to provide an integrated sample over time, susceptibility to tampering, and time periods for which they may be usefully ...
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