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In September 2009, the World Health Organization released a comprehensive global initiative on radon that recommended a reference level of 100 Bq/m 3 for radon, urging establishment or strengthening of radon measurement and mitigation programs as well as development building codes requiring radon prevention measures in homes under construction ...
Radon removal from water supplies may be at a treatment plant, point of entry, or point of use. Public water supplies in the United States were required to treat for radionuclides beginning in 2003 but private wells are not regulated by the federal government as of 2014. The radon can be captured by granular activated charcoal (GAR) or released ...
It has since become one of the leading sources of user-generated reviews and ratings for businesses. Yelp grew in usage and raised several rounds of funding in the following years. By 2010, it had $30 million in revenue, and the website had published about 4.5 million crowd-sourced reviews. From 2009 to 2012, Yelp expanded throughout Europe and ...
Radon concentration can differ widely from place to place. In the open air, it ranges from 1 to 100 Bq/m 3, even less (0.1 Bq/m 3) above the ocean. In caves or ventilated mines, or poorly ventilated houses, its concentration climbs to 20–2,000 Bq/m 3. [79] Radon concentration can be much higher in mining contexts.
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Radium-228 is more likely to cause cancer of the bone as the shorter half-life of radon-220 compared to radon-222 causes the daughter nuclides of radium-228 to deliver a greater dose of alpha radiation to the bones. It also considers the induction of several forms of cancer caused by internal exposure to radium and its daughter nuclides.
Historic American Engineering Record (HAER) No. NJ-121, "United States Radium Corporation, 422-432 Alden Street, Orange, Essex County, NJ", 3 photos, 98 data pages, 2 photo caption pages HAER No. NJ-121-A, " United States Radium Corporation, Paint Application Building ", 8 photos, 16 data pages, 3 photo caption pages
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