Additional Testing FAQ

• This test can be used during any season as long as closed building conditions can be maintained.
• There is no need to change normal entry and exit routines but it is important to make sure that doors are closed when exiting.
• All external doors, windows, and vents should be kept closed from 12 hours before starting the test to the end of the test.
• Do not operate any whole house or window fans during the test.
• Also, this test should not be started if severe weather is predicted (example: a major storm system with winds exceeding 30 miles per hour).If the building has a permanently installed radon mitigation system, air to air heat exchanger, and/or combustion air supplies for furnaces, etc., then these components/devices should be operated normally.

• This sampler is designed to be exposed 72 to 168 hours (three to seven days).
• The test must be left in place for at least 3 days.
• Exposure can last up to 7 days if the testing environment has less than 55% relative humidity.
• The test result will be an average of approximately the last 4 days of the exposure period.

• Things to do:
  • The test should be done in the lowest building area that is regularly used (except for Pennsylvania Citizens that are required to test the lowest livable area of the building.)
  • Placement is especially important if conducting only one test or a follow-up test (which would confirm the need for radon mitigation.)
  • It is crucial that each kit is placed where it will not be disturbed.
  • The preferred method is to hang the kit centrally in the room.
  • Use one kit per every 2000 square feet of floor space being tested.
  • Test kits should be within the normal breathing zone (2 to 6 feet from the floor.)
  • Hanging a kit from an interior non-masonry wall is acceptable as long as the opening is not blocked (with at least 4 inches clearance.)
  • A string may be useful to hang the kit from the ceiling or a light fixture.
  • Keep test kits at least 3 feet away from doorways, hallways, windows, exterior walls, and heating or air-conditioning vents.
  • Keep test kits out of direct sunlight. Heat can reduce the sensitivity of some radon measurement devices.
  • Keep all test kits or activated charcoal devices at least 3 feet from each other (except for those performing Quality Control audits or testing for a real estate transactions.)
• Things not to do:
  • Do not place the kit in a draft.
  • Do not place kits in the same room with any type of operating fan or blower. Air blowing on or near an activated charcoal sampler may increase its sensitivity to radon.
  • Do not place a kit near any heat source such as a stove, fireplace, or baseboard heater.
  • Do not test areas with high humidity, such as bathrooms, kitchens, laundry rooms, closets, or damp basements. If you must test a damp or humid room with over 55% relative humidity, then test only for the shortest recommended period. Moisture may reduce the sensitivity of some radon measurement devices.

Our laboratory has processed over two million radon tests and we have seen almost everything that can happen to a radon test sample.

We have thousands of unreturnable test results in our database due to missing or illegible information.

Readable information is required from all customers otherwise a reprocessing fee may be charged before releasing results.

We recommend sending samples to the lab as soon as possible in order to get the best results. If the sampler takes more than a week to arrive at our lab then the test result will not be as accurate as one that arrives within three or four days.

• If it takes over 8 days to get to our lab then only an estimated result can be provided.
• If it takes over 11 days then no result can be provided.

If you have not received your test result within three weeks, then please send your name/address, test dates and times, serial number(s) of the test(s) and any other pertinent information to:

Radon Lab

1936 Butler Bridge Rd

Mills River, NC 28759-3892.

Email: info@radon.com

Fax: (828) 684-8498