A. Radon come from the radioactive decay of radium in the ground which in turn comes from the decay of uranium which can be found in at least trace amounts in ALL soils and rocks, though the amount can vary greatly depending on locale.<\/p>\n
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![\"Radon](\"http:\/\/emfsurveydallas.com\/wp-content\/uploads\/2013\/07\/radon-decay-chart.gif\")
<\/a>Radon Gas Decay Chart<\/p><\/div>\n
Q. What factors are important in radon emissions?<\/strong><\/p>\n A. The largest factor is the geology of the land as emissions are directly dependent on the type of bedrock and deposits involved. Certain granites, shales, phosphatic rocks and minerals containing uranium and radium can potentially release more radon gas, though the pathway efficiency to the surface is influenced by everything from groundwater and CO2 transmission characteristics, to weather and atmospheric conditions such as wind, humidity, rainfall, barometric pressure, as well as soil characteristics.<\/p>\n <\/p>\n Q. Can radon levels indoors and outdoors be very different from each other?<\/strong><\/p>\n A. Yes, they can depending on the structure and ventilation of the building. Also, there can be large variances between the outdoor\/indoor radon air levels and what you may find in the soil and water.<\/p>\n This is why you generally cannot evaluate the radon levels of a proposed home until after it is built.<\/p>\n More information can be found here:<\/p>\n http:\/\/www.scantech7.com\/radon_faq_dallas_ft_worth.htm <\/a><\/p>\n