Browsing the "granite" Tag

Free Testing for Homes with Exotic Granite

March 15th, 2009 | by Linda Kincaid, MPH, CIH

Some granite emits substantial amounts of radiation and radon gas. There is no way to tell which stones are radioactive just by looking. Testing is the only way to know for sure. However, the problem granites are more likely to be exotic and to have a lot of “movement”, such as swirls or banding.


Hostile Granite Showrooms Refuse to Discuss Radiation

February 2nd, 2009 | by Linda Kincaid, MPH, CIH

Erica Marcus declared, “I was basically thrown out of a showroom today for mentioning radiation to the owner”. She says, “This tells a lot about the industry knowing about what they are selling”.


Worries About Granite Lead to California Homes with Radon

January 27th, 2009 | by Linda Kincaid, MPH, CIH

A homeowner in Menlo Park, CA recently discovered that his home had 14 picoCuries/liter of radon, three times the EPA action level of 4 picoCuries/liter (pCI/L). He tested his home for radon because he was concerned about his new granite counters. However, his granite was not the source of the radon. He had "geologic" radon coming from the soil beneath his house.


Granite Counters: Uranium Ore In Disguise?

January 24th, 2009 | by Linda Kincaid, MPH, CIH

Cathy Woods' new granite counters were radioactive. They contained as much uranium as commercial uranium ore. The showroom that sold Cathy her Jupurana Bordeaux granite did not warn her that some granite is radioactive. When I contacted the salesman, posing as a customer, he assured me their granite "is no more radioactive than soil or water". However, Cathy's granite emitted gamma radiation at many times background. The radon gas emitted by the stone tripled the radon concentration in her kitchen.



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