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  1. #1

    Default NY Times Granite & Radon

    Check this story out:

    NY Times, Granite & Radon

    See, I told you on my post found in Safety about the stones from Namibia!

  2. #2
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    Default Re: NY Times Granite & Radon

    chris radon is all around us being released from the ground all the time. the problem is caused when radon is concentrated by lack of air movement mainly in places like basements or homes that would be closed up air tight and no air movement. in the general home you have conditioned air, doors opened and closed windows as well as normal air leaks all these will not allow radon to build up. radon is a heavier than air gas sits real close to the floor and with air currents is dispersed easily. that article is not a factual article presented by anyone who has knowledge in the area.

  3. #3
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    Default Re: NY Times Granite & Radon

    Quote Originally Posted by YukYuk View Post
    Radioactive atomic decay, atomic sub-particles are heavier then air??? and negated by air exchange/movement???!!! HUH? What?

    FYI:
    "Radon is a radioactive gas. It is colorless, odorless, tasteless, and chemically inert. Unless you test for it, there is no way of telling how much is present.

    Radon is formed by the natural radioactive decay of uranium in rock, soil, and water. Naturally existing, low levels of uranium occur widely in Earth's crust. It can be found in all 50 states. Once produced, radon moves through the ground to the air above. Some remains below the surface and dissolves in water that collects and flows under the ground's surface.

    Radon has a half-life of about four days—half of a given quantity of it breaks down every four days. When radon undergoes radioactive decay, it emits ionizing radiation in the form of alpha particles. It also produces short-lived decay products, often called progeny or daughters, some of which are also radioactive.

    Unlike radon, the progeny are not gases and can easily attach to dust and other particles. Those particles can be transported by air and can also be breathed.

    The decay of progeny continues until stable, non-radioactive progeny are formed. At each step in the decay process, radiation is released.


    Sometimes, the term radon is used in a broad sense, referring to radon and its radioactive progeny all at once. When testing measures radiation from the progeny, rather than radon itself, the measurements are usually expressed in working level (WL) units. When radiation from radon is measured directly, the amount is usually expressed in picocuries per liter of air (pCi/L)."

    If your granite has a high uranium content, evidenced by the "radon measurements" (actually measurements of the decay componants of radon) then you shouldn't use it. Granite doesn't "contain" radon, it contains Uranium, which when it (uranium) decays one of the products of that uranium decay is RADON which is emitted (in additon to sub-atomic particles, etc.).
    fyi

    http://www.britannica.com/EBchecked/...20Encyclopedia

    http://www.marble-institute.com/indu...-akron2008.pdf

  4. #4
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    Default Re: NY Times Granite & Radon

    Quote Originally Posted by YukYuk View Post
    FYI:

    http://www.nsc.org/resources/issues/rad/science.aspx

    http://downloads.nsc.org/PDF/063105_Radiation.pdf

    http://www.nsc.org/resources/issues/radon/index.aspx

    P.S. FYI: About the National Safety Council:
    Mission
    To educate and influence people to prevent accidental injury and death.

    Vision
    Making our world safer.

    The National Safety Council is a 501 (c) (3) non-for-profit, charitable, international public service organization dedicated to educating and influencing people to prevent accidental injuries and deaths.

    Founded in 1913 and chartered by the U.S. Congress in 1953, the NSC is the only organization promoting safety in the workplace, in transportation, and in homes and communities.

    Members of the NSC include 18,600 companies of all sizes and from a broad spectrum of industries, representing 33,300 locations and 8.5 million employees around the world.

    The National Safety Council serves as the nation's leading resource on industry trends, professional development, and strategies for advancing safety and health programs and practices. The Council is active in converting injury research and trends information into injury prevention education, training, consultation and advocacy leadership.
    Like another poster on the board you aren't reasoning on the topic you are posting links but you obviously aren't reading the posted material that I linked to you. other wise you would have seen why I posted what I did. like many other avenues of science there are disagreement on many things. and to jump to conclusions before a person has done adaquate research is nothing more than either scare tactis or sensationalism. and since the scientist can't agree on the danger level and if the radiation from counter tops pose a health hazard. more research would need to be done. look at the study I linked from the university in akron and if you read it with an open mind and not prejudice. you might be able to see it from a different view point.

  5. #5
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    Default Re: NY Times Granite & Radon

    Quote Originally Posted by YukYuk View Post
    I am in fact reasoning on the actual topic. It is you who are not. Ditto on your not having read or comprehended posted material nor material that was linked to. There is no scare tactics involved, granite quarried from different deposits and even within the same general quarry location can and does often contain varing uranium content. There are for example certain "hot" granite quarries in Colorado which are still actively being quarried, but are more responsibly sold only for OUTDOOR use and specifically not to be used in the construction (even exterior) of building surfaces. It is indeed correct to question the uranium content of certain sourced granite - especially when Generally Accepted Scientific Methods of testing and analyzing evidence of that uranium content yields higher levels. It is a caveat emptor situation at the present since it is not generally regulated. I realize have a personal interest in this topic as granite and other stone surfaces are your present livelihood, but it is indeed you who protest too much an are not correct that all granite is benign nor that it contains the same amounts (if any measurable quantity as in some cases) of decaying uranium. Unlike other methods to deal with evacuation or prevention of radon gas into the home in the first place via earth or water sources, one would not and could not encapsulate a granite surfacing material in a layer, adjust air pressure within and vacuum extract, and neither would such process (evacuating radon gas emmissions) prevent the radiation from the decay process from penetrating and entering the living area. If the granite is "hot" it should not be installed, more responsible quarries, dealers, importers, etc. market it for fabrication as headstones, park benches, etc. One has to be suspect of import chains especially from poorer countries as they are "off shore" and not subject to US jurisdiction - and as we well know from the crud China has dumped on this market (what little we DO know about) can't be trusted to do the "ethical" thing.

    Your so-called "study" was merely one of several parts of a thesis paper. It is limited in scope and the author (NOT PEER REVIEWED BTW) only measured actual radon gas - and IF you read and comprehended this paper correctly, you would see that his examples were further flawed in that he used a 2900 sq. ft. home and calculated action levels as though the entire structure was sealed and unoccupied. He did NOT measure alpha, beta, gamma radiation, did not measure the continued radioactivity. His results are all based on measuring actual RADON GAS, a singular aspect of uranium (to radium) decay. The so-called "study" which is not a "study" is flawed, and merely a self-published portion of a thesis project by an individual.
    once again you proved you didn't read Dr. Chyi is currently a professor of Geology and Civil Engineering. He is a fellow of the Geological Society of America and Society of Economic Geologists. Dr. Chyi has served on the University of Akron Radiation Safety Committee from 1984 to 2005, and chaired from 1988-1992, 1994-2000, and 2002-2005. Other than regular geology courses, he also taught nuclear geology and radon geochemistry.
    Dr. Chyi has been engaged in radiochemical analysis since 1966. In addition to his geology background, he also has worked in the Department of Chemistry, University of Kentucky from 1972-1974, and the Division of Applied Physics, Argonne National Laboratory in the summer of 1979. He engaged in aggregate application research recently with the Department of Civil Engineering, The University of Akron. He has engaged in soil gas radon research for earthquake forecast with National Taiwan University since 2000.

    so that hardly qualifies as a thesis paper. if ignorance is bliss then you are one happy fool

  6. #6
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    Default Re: NY Times Granite & Radon

    *** I sure am glad you are so much smarter than a professor of Geology. he is also one of the ones that so many others in his field quote him as the expert. but you and your google are so much smarter than his years of experience that dates as far back as the 60's. ammmmmmazing

  7. #7
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    Default Re: NY Times Granite & Radon

    verrrrrry good now do some more gooogle and tell me what that has to do with granite counter tops and how having it as a counter top is so much more dangerous then the radiation in the products in your home and that emiting form the computer thats sitting in front of you.

  8. #8
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    Default Re: NY Times Granite & Radon

    from computers, television, microwave oven, cellular phone all emit radiation and people are exposed to all of them. so to be fair should we rip all them out of the home? why are you on the computer don't you care about your health? do you have a cell phone? throw it away.

    http://www.bella******.com/articles/art49755.asp

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