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  2. Radon mitigation - Wikipedia

    en.wikipedia.org/wiki/Radon_mitigation

    A typical radon test kit Fluctuation of ambient air radon concentration over one week, measured in a laboratory. The first step in mitigation is testing. No level of radiation is considered completely safe, but as it cannot be eliminated, governments around the world have set various action levels to provide guidance on when radon concentrations should be reduced.

  3. Tomasso Group - Wikipedia

    en.wikipedia.org/wiki/Tomasso_Group

    In 1968 Tunxis Management was formed to manage the companies real estate holdings. In 1972 the core construction business Angelo Tomasso, Inc was sold to Ashland Resources. Tunxis Management remained under family ownership and within a few years the family had reconstituted the contracting business under the name TBI Construction [ 1 ] and the ...

  4. List of Connecticut companies - Wikipedia

    en.wikipedia.org/wiki/List_of_Connecticut_companies

    The following list of Connecticut companies includes notable companies that are, or once were, headquartered in Connecticut. Companies based in Connecticut. A

  5. History of computed tomography - Wikipedia

    en.wikipedia.org/wiki/History_of_computed_tomography

    The history of X-ray computed tomography (CT) dates back to at least 1917 with the mathematical theory of the Radon transform. [ 1 ] [ 2 ] In the early 1900s an Italian radiologist named Alessandro Vallebona invented tomography (named "stratigrafia") which used radiographic film to see a single slice of the body.

  6. List of companies based in Norwalk, Connecticut - Wikipedia

    en.wikipedia.org/wiki/List_of_companies_based_in...

    This is a list of large or well-known interstate or international companies in the Norwalk, Connecticut area. Norwalk is home to a Fortune 500 company, EMCOR. Companies currently headquartered in Norwalk, Connecticut

  7. Health effects of radon - Wikipedia

    en.wikipedia.org/wiki/Health_effects_of_radon

    If it is suspected that a private well or drinking water may be affected by radon, the National Radon Program Services Hotline at 1-800-SOS-RADON can be contacted for information regarding state radon office phone numbers. State radon offices can provide additional resources, such as local laboratories that can test water for radon. [109]