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Old 10-20-2010, 09:38 AM
 
5 posts, read 39,642 times
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The results of a 48-hour Air Chek-brand radon test just came back and show an average reading of 2.3 pCi/l. The first 42 hours of the test gave readings of between 0.0 pCi/l and 2.9 pCi/l with an average of about 1.2 pCi/l, however the last 6 hours of the test gave readings of 3.9, 5.8, 8.1, 10.2, 11.9, and 13.1 pCi/l, respectively. This test was performed in a house that I'm buying so I don't know if the conditions in the testing area remained consistent, however, I do know that the temperature fluctuated in tandem with the radon levels. Should I retest the house or trust the low average?

Thanks!
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Old 10-20-2010, 09:46 AM
 
Location: Roanoke, VA
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Weather conditions can cause radon levels to fluctuate. Assuming you have a real estate agent that represents you, consult with your agent and the radon inspector about the best approach.
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Old 10-20-2010, 09:57 AM
 
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I don't have a realtor, this is a for-sale-by-owner property.
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Old 10-20-2010, 10:24 AM
 
Location: Roanoke, VA
4 posts, read 18,950 times
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Then, you will want to consult the attorney that is closing the transaction about your contractual options, since the contract likely addresses a radon test.
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Old 10-20-2010, 12:41 PM
 
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I've already spoken to my attorney... I have the option to retest but I'm not sure if it's necessary since the average was below 4.0 pCi/l. This is not a transaction question, it's a technical radon test question.
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Old 10-20-2010, 02:24 PM
 
Location: Marion, IN
8,191 posts, read 27,459,376 times
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Acceptable radon levels vs. Safe radon levels

After reading this you should either demand that the seller installs a mitigation system or walk.
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Old 10-20-2010, 02:38 PM
 
Location: NJ
17,579 posts, read 38,295,421 times
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Who did the test?
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Old 10-20-2010, 04:34 PM
 
5 posts, read 39,642 times
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Quote:
Originally Posted by Racelady88 View Post
Acceptable radon levels vs. Safe radon levels

After reading this you should either demand that the seller installs a mitigation system or walk.
There was actually a test that took place prior to the test I referenced above. The first test came back at 4.6 pCi/l with no hourly breakdown, however, I (regretfully) authorized a second test to be performed because I know how inaccurate 48-hour tests can be. The second test, the one this thread pertains to, resulted in an average reading of 2.7 pCi/l which is within the EPA guideline of 4.0 pCi/l. My questions pertains to the large jump in the hourly breakdown... the fact that within two days there were reading of 0.0 pCi/l... NO radon... to 13+ pCi/l confuses me. I don't know if large spikes like the one I had are normal occasional occurrences or cause for concern.

When I authorized the second test, performed by a home inspection company, I made sure that I had a chance to have a third test performed.
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Old 10-20-2010, 07:42 PM
 
Location: Ridgewood
302 posts, read 1,832,031 times
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If there is a lab that authorizes the test result, I would call them and ask the questions.

I looked at the Air Chek website, and I see only charcoal type kits and Alpha Track for long term tests. Was a continous monitor used?

How did the temperature readings fluctuate?
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Old 10-21-2010, 06:50 AM
 
5 posts, read 39,642 times
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Quote:
Originally Posted by Bergenite View Post
If there is a lab that authorizes the test result, I would call them and ask the questions.

I looked at the Air Chek website, and I see only charcoal type kits and Alpha Track for long term tests. Was a continous monitor used?

How did the temperature readings fluctuate?
My guess is that a continuous monitor must have been used because I was provided with hourly data for 48 hours. The temperature stayed a consistent 60 - 63 degrees while the radon readings were low and spiked to 70 degrees exactly when the the radon readings spiked to ~13 pCi/l. I figured the temperature caused the radon spike, but on a year-round basis, the average may be below EPA's accepted 4.0 pCi/l... I just don't have the time for a long-term test.
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