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2. Radon mitigation - Wikipedia

   en.wikipedia.org/wiki/Radon_mitigation

   High radon levels in a Minnesota (USA) basement with a passive under slab vent pipe system can be seen in the left half of the graph. After installation of a radon fan (ASD), a permanent reduction in radon levels to approximately 0.6 pCi/L can be seen in the right half of the graph. The most common approach is active soil depressurization (ASD).

3. Health effects of radon - Wikipedia

   en.wikipedia.org/wiki/Health_effects_of_radon

   The high cost of radon remediation in the 1980s led to detractors arguing that the issue is a financial boondoggle reminiscent of the swine flu scare of 1976. [117] They further argued that the results of mitigation are inconsistent with lowered cancer risk, especially when indoor radon levels are in the lower range of the actionable exposure ...

4. Indoor air quality - Wikipedia

   en.wikipedia.org/wiki/Indoor_air_quality

   Radon is measured in picocuries per liter of air (pCi/L) or becquerel per cubic meter (Bq m-3). Both are measurements of radioactivity. The World Health Organization (WHO) sets the ideal indoor radon levels at 100 Bq/m-3. [97] In the United States, it is recommend to fix homes with radon levels at or above 4 pCi/L.

5. Roof insurance: ACV vs. replacement cost - AOL

   www.aol.com/finance/roof-insurance-acv-vs...

   If your home is insured for $100,000, which includes your roof, and you have 125 percent extended replacement cost coverage, you actually have $125,000 in coverage, should the $100,000 not be ...

6. Radium and radon in the environment - Wikipedia

   en.wikipedia.org/wiki/Radium_and_radon_in_the...

   In a working mine, the radon level can be controlled by ventilation, sealing off old workings and controlling the water in the mine. The level in a mine can go up when a mine is abandoned; it can reach a level which can cause the skin to become red (a mild radiation burn). The radon levels in some of the mines can reach 400 to 700 kBq m −3. [17]

7. Radon - Wikipedia

   en.wikipedia.org/wiki/Radon

   Homes built on a crawl space may benefit from a radon collector installed under a "radon barrier" (a sheet of plastic that covers the crawl space). [13] [177] For crawl spaces, the EPA states that "[a]n effective method to reduce radon levels in crawl space homes involves covering the earth floor with a high-density plastic sheet. A vent pipe ...