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Part of a radon mitigation system including the fan and vent pipe is visible near the gutter downspout. Because high levels of radon have been found in every state of the United States, [18] testing for radon and installing radon mitigation systems has become a specialized industry since the 1980s. Many states have implemented programs that ...
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 concentrations can vary daily, and accurate radon exposure estimates require long-term average radon measurements in the spaces where an individual spends a significant amount of time. [ 173 ] Radon levels fluctuate naturally, due to factors like transient weather conditions, so an initial test might not be an accurate assessment of a ...
The bill would direct the Committee to submit a Strategic Plan for the Program that includes: (1) prioritized goals that will mitigate against the loss of life and property from future windstorms; (2) research objectives to achieve those goals; (3) a description of the role of each Program agency in achieving such goals; (4) the methods by ...
There are 39 known isotopes of radon (86 Rn), from 193 Rn to 231 Rn; all are radioactive.The most stable isotope is 222 Rn with a half-life of 3.8235 days, which decays into 218 Po
Working level (WL) is a historical unit of concentration of radioactive decay products of radon, applied to uranium mining environment. [1] One working level refers to the concentration of short-lived decay products of radon in equilibrium with 3,700 Bq/m 3 (100 pCi/L) in air. These decay products would emit 1.3 × 10 5 MeV in complete decay. [2]
Bus wrapped in Spare the Air promotional material. Spare the Air is a program established by the Bay Area Air Quality Management District in 1991 to combat air pollution during the summer in the San Francisco Bay Area, the season when clear skies, hot temperatures, lighter winds, and a strong temperature inversion combine and trap air pollutants near the ground.
The program did not begin immediately, but was implemented in two stages: Phase I (starting January 1, 1995) and Phase II (starting January 1, 2000). [6] The Clean Air Act Amendments of 1990 set as its primary goal the reduction of annual SO 2 emissions by 10 million tons below 1980 levels of about 18.9 million tons. To achieve these reductions ...