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Pb as observed in Japan as a function of time, due to variations in radon concentration. [4] Radon concentration in the atmosphere is usually measured in becquerels per cubic meter (Bq/m 3), which is an SI derived unit. As a frame of reference, typical domestic exposures are about 100 Bq/m 3 indoors and 10–20 Bq/m 3 outdoors.
Radon concentration in open air varies between 1 and 100 Bq m −3. [6] Radon can be found in some spring waters and hot springs. [7] The towns of Misasa, Japan, and Bad Kreuznach, Germany boast radium-rich springs which emit radon, as does Radium Springs, New Mexico.
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.
The average population of Ohio's counties was 133,931; Franklin County was the most populous (1,326,063) and Vinton County was the least (12,474). The average land area is 464 sq mi (1,200 km 2 ). The largest county by area is Ashtabula County at 702.44 sq mi (1,819.3 km 2 ), and its neighbor, Lake County , is the smallest at 228.21 sq mi (591. ...
The Old Courthouse Catacombs won't be able to operate in its normal location this year due to radon in the county building's subbasement. ... Maps show where fires are burning right now in L.A. area.
International radiation protection organizations estimate that a committed dose may be calculated by multiplying the equilibrium equivalent concentration (EEC) of radon by a factor of 8 to 9 nSv·m 3 / Bq·h and the EEC of thoron by a factor of 40 nSv·m 3 / Bq·h . [2] Most of the atmospheric background is caused by radon and ...
Of Ohio's 88 counties, Delaware County — home to 231,636 of Ohio's nearly 11.8 million residents — has the highest life expectancy in the state at 81.3 years, according to a study published ...
Located in the northwestern corner of the county, it borders the following townships: Sunfish Township, Pike County - north; Camp Creek Township, Pike County - northeast; Morgan Township - east; Brush Creek Township - south; Meigs Township, Adams County - southwest; Franklin Township, Adams County - west; The village of Rarden lies in the ...