Arizona Naturally Occurring Radium, Thorium, Or Other Materials

State:
Multi-State
Control #:
US-OG-500
Format:
Word; 
Rich Text
Instant download

Description

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.

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FAQ

Thorium is a naturally occurring radioactive metal that is found in soil, rock, and water. It is formed by the radioactive decay of uranium. Minerals such as monazite, thorite, and thorianite are rich in thorium and may be mined for the metal. Thorium has coloring properties that have made it useful in ceramic glazes.

Thorium minerals occur in alkaline igneous rocks and car- bonatites, but the most concentrated deposits occur in epigen- etic veins that surround alkaline igneous complexes.

The most common source of thorium is the rare earth phosphate mineral, monazite, which contains up to about 12% thorium phosphate, but 6-7% on average. Monazite is found in igneous and other rocks but the richest concentrations are in placer deposits, concentrated by wave and current action with other heavy minerals.

There are natural and man-made forms of thorium, all of which are radioactive. In general, naturally occurring thorium exists as Th-232, Th-230 or Th-228.

Almost all naturally occurring thorium exists in the form of either radioactive isotope thorium-232, thorium-230, and thorium-228. There are more than 10 other thorium isotopes that can be artificially produced.

In the natural environment, radium occurs at trace levels in virtually all rock, soil, water, plants and animals. In areas where radium concentrations in rocks and soils are higher, the groundwater also typically has relatively higher radium content. Milling of uranium concentrates radium in the tailings.

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.

No further change will occur. Incandescent Gas Lantern Mantles Incandescent Gas Lantern Mantles. Magnesium-Thorium Alloy. Thoriated Camera Lens Thoriated Camera Lens. Thorium Containing Welding Rod Thorium Containing Welding Rod.

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Arizona Naturally Occurring Radium, Thorium, Or Other Materials