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Maps of average radon levels in houses are available, to assist in planning mitigation measures. [8] While high uranium in the soil/rock under a house does not always lead to a high radon level in air, a positive correlation between the uranium content of the soil and the radon level in air can be seen.
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.
To achieve these aims, WHO has formed a network of key partner agencies from some 40 Member States. This network is the basis for the WHO International Radon Project which was launched in 2005. Working groups will collect and analyse information on radon risk, radon policies, radon mitigation and prevention as well as risk communication.
Radon concentration at the shores of large oceans is typically 1 Bq/m 3. Radon trace concentration above oceans or in Antarctica can be lower than 0.1 Bq/m 3, [100] with changes in radon levels being used to track foreign pollutants. [101] 10: 0.27 Mean continental concentration in the open air: 10 to 30 Bq/m 3.
In many cases, mitigators can use PVC piping and specialized radon suction fans to exhaust sub-slab, or sub-membrane radon and other soil gases to the outside atmosphere. Most of these solutions for radon mitigation require maintenance, and it is important to continually replace any fans or filters as needed to continue proper functioning. [109]
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SR 16 runs from the New Hampshire state line (signed as NH-16) at Wentworth Location (near Lake Aziscohos) in the west to Orono at the eastern terminus. State Route 16 runs a total of 190 miles (310 km), passing mostly through rural areas, with the largest population center at its eastern terminus in Orono at Interstate 95 (I-95).
In this 2018 map by the N.H. Department of Transportation, the Lakes Region (in darker blue) is located in the east-central portion of the state. The Lakes Region of New Hampshire is located in the east-central part of the state, south of the White Mountains Region and extending to the Maine border.
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