Hi Boo.....yes been a while but glad things are going well.....take care n have a great Thanksgiving........

First off I am a geologist. (Im stating that upfront, because I usually try to be very careful when I provide advice to state that something is only my medically unqualified opinion. In this case I can state I AM qualified to have an opinion. Smile)

Radon cannot cause COPD. The only concern is that theoretically the decay by-products (daughters) might be associated with of Lung Cancer, however, Although *political* organizations (such as the US EPA) publish a variety of statements of elevated risk, to date (2015) there are NO *scientific* studies that have ever shown that radon gas, as typically seen** in residential houses, actually increases the risk of cancer. In fact, all *scientific* studies to date have shown one of two things there is no risk, or even a slightly decreasing risk of cancer.

[** This is the major problem of the whole process for three main reasons:
1) None of the devices used by home inspectors or in real estate transactions actually measure radon. ALL devices used by home inspectors and radon consultants measures some secondary aspect assumed to be associated with radon and then by using various assumptions and mathematical machinations generate a radon equivalent. None of these devices are designed to actually measure radon and cannot produce with any validity or confidence an accurate radon exposure estimate. Period.
2) The result of any radon test can change dramatically for any of an extreme range of factors, including but not limited to; cycling of A/C or Furnace; barometric pressure; difference between inside and outside temperature; interior or exterior doors open or close, and frequency; amount of dust; average size of dust; snow cover; wet or dry weather; time of day; time of year; using air fresheners/candles or not; a fireplace; wind direction; wind speed;
3) Home inspectors have absolutely no interest in being *scientifically* accurate. Their only interest is to follow EPA guidelines to maintain their certification, or in providing money making mitigation schemes. (Which by the way, if one would want to reduce radon, is far more complex than most contractors can manage.)
]

It is so good to "see" you Boo! I'm glad that you are doing so well & have been able to get off the 02! I love that you still "check in" with us now and then ((((HUGS)))

Boo; you made a little math mistake.
you don't do a decimal with the % sign.
.4 (.40) would be 40%
so .49 is 49% a 9% difference
(not a 45% difference :) )

according to this;
http://www.radon.com/radon/radon_FAQ.html
"The US EPA has established a guideline for do-it-yourself radon test kit accuracy of +/- 25%. This equates to +/- 1 picocurie at the EPA's action level of 4 picocuries per liter of air in the home. This level of accuracy is easily accomplished when using most do-it-yourself devices, IF the user carefully follows the instructions."

I do hope this doesn't jeopardize your selling the house. My son just lost a sale on his house because a stupid auditor used wrong information on how much clearance a crawl space should be & the prospective buyers backed out even after correct info was provided to them.

ps. I thought this map showing radon in USA was interesting, but be sure to read the "disclaimer" at the top of it.
http://www2.epa.gov/radon/find-information-about-local-radon-zones-and-radon-programs#stateradon