The Naturally Occurring Radium, Thorium, Or Other Materials (“Norm”) form, the assignee has inspected the assets for the purpose of detecting the presence or concentration of naturally occurring radium, thorium, and other such materials (“NORM”) and satisfied itself as to their physical and environmental condition, both surface and subsurface, and Assignee accepts all of the same.
District of Columbia Naturally Occurring Radium, Thorium, Or Other Materials
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Multi-State
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US-OG-500
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Word;
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FAQ
Thorium oxide (ThO2), also called thoria, has one of the highest melting points of all oxides (3300°C) and so it has found applications in light bulb elements, lantern mantles, arc-light lamps, welding electrodes and heat-resistant ceramics.
What Is NORM? Naturally occurring radioactive material (NORM) is found in the environment and contains radioactive elements of natural origin. NORM primarily contains uranium, thorium and in some cases potassium. Even though uranium and thorium occur naturally, by statute and rule they are defined as source material.
Where Is Radon Found? Radon has been found in elevated levels in every state in the U.S. and in the District of Columbia. ing to EPA statistics, one in every 15 homes has elevated radon levels.
These naturally radioactive materials are called TENORM. Radionuclides commonly found in TENORM are radium, radon, uranium, potassium and thorium. The level of radioactivity in TENORM can vary widely. TENORM can be found in solids, liquids, sludges and/or gases.
Ceramic materials such as tiles or pottery often contain elevated levels of naturally occurring uranium, thorium, or potassium. Some pre-1960 tiles, pottery, and ceramics?especially those with an orange-red glaze such as Fiestaware®?are radioactive due to the uranium in the glaze.
Thorium (chemical symbol Th) is a naturally occurring radioactive metal found at trace levels in soil, rocks, water, plants and animals. Thorium is solid under normal conditions. There are natural and man-made forms of thorium, all of which are radioactive.
Thorium has coloring properties that have made it useful in ceramic glazes. Thorium also has been widely used in lantern mantles for the brightness it imparts (though alternatives are replacing it), and in welding rods, which burn better with small amounts of added thorium.
What kinds of consumer products contain radioactive materials? Smoke detectors: most smoke detectors available for home use contain americium-241, a radioactive element. ... Clocks and watches: some luminous watches and clocks contain a small quantity of hydrogen-3 (tritium) or promethium-147.
