Wednesday, September 24, 2008

Radon?

As a home inspector I always receive questions about Radon. The big question is "Why Should My Home Be Tested for Radon?"

As the public becomes more aware of Radon, there has become an increased demand for testing of homes before a purchase. Most relocation companies now require Radon testing as part of the transaction. The EPA and a number of states have incresed their awareness programs. The national average indoor radon level is about 1.3 pCi/L while outdoor radon levels average 0.4 pCi/L. The higher a home’s radon level, the greater the health risks. The EPA has a Radon Zone map that rates the concentration of radon into 3 zones. Zone 1 of the EPA’s radon potential map (highest level)? Zone 1 is described as an area that has a predicted average indoor radon level of greater than 4 pCi/L. The level of 4 pCi/L is called the action level, where the EPA recommends that action be taken to reduce the indoor concentration of Radon. Zone 2 is counties have a predicted average indoor radon screening level between 2 and 4 pCi/L. Zone 3 is counties have a predicted average indoor radon screening level less than 2 pCi/L.

What is Radon?

Radon is a radioactive gas that is colorless, odorless and tasteless. It is formed by the natural breakdown of uranium in soil, rock and water. Radon also breaks down to form additional radioactive particles called “progeny”.

When Radon escapes from the ground into the outdoor air it is diluted to low concentrations and is not a concern. However, radon that enters an enclosed space, such as a home, can accumulate to high levels. The only way to determine the concentration of Radon in a home is testing by a professional, like The HomeTeam Inspection Service.

What is the Risk?

The Surgeon General warns that radon is the second leading cause of lung cancer in the United States. Radon gas and radon progeny in the air can be breathed into the lungs where they breakdown further and emit “alpha particles”. Alpha particles release small bursts of energy, which are absorbed by nearby lung tissue. This results in lung cell death or damage.

When lung cells are damaged, they have the potential to result in cancer when they reproduce. Cancers caused by radioactivity are started by chance and not everyone exposed to Radon will develop lung cancer. The time between exposure and the onset of the disease is usually many years.

The risk of developing lung cancer from Radon depends on the concentration of radon in the air you breathe and the length of time you are exposed.
Taking the necessary actions against the radioactive gas that cannot be seen, smelled, or tasted requires getting homes tested for elevated levels. Radon could not only be harbored in the home, but exposure can be a potentially dangerous health hazard. As Realtors, you can also direct your clients to the EPA’s “Home Buyers and Sellers Guide to Radon” www.epa.gov/iaq/radon/pubs/hybyguid.html and “A Citizens Guide to Radon” www.epa.gov/iaq/radon/pubs/citguide.html

Stay tuned for more on radon tomorrow.

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