|Q.||Why test for Radon?||Q.||If I am selling my house, what should I do?|
|Q.||How long should I test?||Q.||Is it expensive to install a system to remove radon from a house?|
|Q.||What do my readings mean?||Q.||I've heard radon is not really a problem. Is this true?|
|Q.||If I am buying a home, what should I do?||Q.||Why should I use a listed or state licensed tester?|
|Q.||Should I buy a house with a radon level greater than 4 pCi/l?||Q.||How much will it cost to add radon-resistant features during construction of a new home?|
|Q.||How much time does radon remediation take?||Q.||How can I be sure that radon-resistant techniques work?|
|Q.||Are any special skills or equipment needed to install radon-resistant features during construction of a new home?||Q.||How much will it cost me to run a radon-reduction system?|
|Q.||I am building a new home. What does my builder have to do to install radon-resistant features during construction?||Q.||Is there anything my builder can do in case the radon- resistant features do not work?|
|Q.||Aside from the health benefits, are there any other benefits to installing radon-resistant features?||Q.||Where in Ohio are the highest levels of indoor radon found?|
|Q.||Why are glacial sediments a source of radon in Ohio?||Q.||Why is the Ohio Shale a source of radon?|
|Q.||What other earth materials in Ohio are likely to be a source of radon?||Q.||I have a question related to radon that I would like to share with other homeowners.|
|Decide whether to accept the test results from the seller or ask the seller to do another test by an ODH-listed tester. (The buyer cannot legally do a test; only the homeowner can.)|
|Perform a long-term test after occupying home.|
|Make sure the test is done as soon as possible, either by the seller or by a licensed tester.|
|Make sure the test is done in the lowest level of the home which is suitable for occupancy.|
|Consider including provisions specifying who will conduct the test, what type of test to do, costs, additional escrow money for radon mitigation, etc.|
|Perform a radon test as soon as possible.|
|If possible, test before putting your home on the market.|
|Test the lowest level of the home which is suitable for occupancy.|
Electrical junction boxes are installed during construction
in case a fan is needed to achieve further radon reductions. Normally,
suction on the pipe is provided by natural pressure differences within
the house. A fan is needed only if the pressure differences cannot lower
radon concentrations to acceptable levels.
Q18. Where in Ohio are the highest levels of indoor radon found?
The highest levels of indoor radon are found mainly in the north-central,
central and west-central parts of the state, and are associated with either
the Ohio Shale or with soils developed on glacial sediments. More localized
areas of high indoor radon are found in other parts of the state, and these
are associated with highly permeable sediments and other poorly understood
Q19. Why are glacial sediments a source of radon in Ohio?
The glacial sediments (called "till") in central and western Ohio contain
large amounts of limestone and dolostone derived from the older, underlying
rocks. Subsequent weathering of these rocks has produced a deep soil on
top of the till that is enriched in uranium. The glacial till itself is
also uraniferous in places where it contains abundant pieces of the underlying
Q20. Why is the Ohio Shale a source of radon?
The Ohio Shale is a geologic formation consisting of a black, organic-
and clay-rich rock. In central and western Ohio, it commonly contains between
10 and 40 parts per million of uranium, and this is 5 to 20 times more
uranium than the average rock in the Earth's crust contains. Radon is a
by-product of the radioactive decay of uranium.
Q21. What other earth materials in Ohio are likely to be a source of radon?
Some localized radon "hot spots" may be associated with relatively permeable
and dry sediments. These could be the sands and gravels found on valley
floors, or the soils that develop on hillsides. Although such materials
may not be enriched in uranium, they can still cause high indoor radon
levels by making it easier, by virtue of their permeability and dryness,
for radon to get to the surface and, hence, into buildings.
Q22. I have a question related to radon that I would like to share with other homeowners.
e-mail your question to Dr. Ashok Kumar,
Your question may be edited for both content and length before being posted
on the web site.
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