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Home Buyer's and Seller's Guide to Radon

EPA Guide to Radon p.25

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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: Radon Testing Checklist (continued)

The test should include method(s) to prevent or detect interference with testing conditions or with the testing device itself.

If the house has an active radon-reduction system, make sure the vent fan is operating properly. If the fan is not operating properly, have it (or ask to have it) repaired and then test.

During a Radon Test: Maintain closed-house conditions during the entire duration of a short-term test, especially for tests shorter than one week in length.

Operate the home's heating and cooling systems normally during the test.

For tests lasting less than one week, operate only air-conditioning units which recirculate interior air.

Do not disturb the test device at any time during the test.

If a radon-reduction system is in place, make sure the system is working properly and will be in operation during the entire radon test.

After a Radon Test: If you conduct the test yourself, be sure to promptly return the test device to the laboratory. Be sure to complete the required information, including start and stop times, test location, etc.

If an elevated radon level is found, fix the home. Contact a qualified radon reduction contractor about lowering the radon level. EPA recommends that you fix the home when the radon level is 4 pCi/L or more.

Be sure that you or the radon tester can demonstrate or provide information to ensure that the testing conditions were not violated during the testing period.


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