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Glossary
The follow definitions are used in the description of the cleanup technologies
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'H' WORDS
| halogenated organic compound | A compound containing molecules of chlorine, bromine, iodine, and/or fluorine. Many herbicides, pesticides, and degreasing agents are made from halogenated organic compounds. |
| hazardous waste | Defined by federal and state law as exhibiting either of the following characteristics: ignitability, corrosivity, reactivity, or toxicity |
| heavy metal | A reference to a group of metals including arsenic, chromium, copper, lead, mercury, silver, and zinc |
| Henry's Law | Henry's Law is a measure of the extent that a chemical separates between water and air. The higher the Henry's Law constant, the more likely substances will volatize rather than remaining in water. |
| herbicide | A chemical pesticide designed to control or destroy plants, weeds, or grasses. |
| heterogeneous | Non-uniform in grain size, structure, or composition. |
| HMX | His Majesty's Explosive ((octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine). |
| homogeneous | Uniform in grain size and structure. |
| hydraulic head | Head is the energy of a body of water produced by elevation, at a given pressure and temperature. It is a measure of potential energy of a body of water. |
| hydrazine | A toxic liquid used in rocket propellant, agricultural chemicals, antioxidants, and explosives. |
| hydrocarbon | An organic compound containing only hydrogen and carbon, often occurring in petroleum, natural gas, and coal. |
| hydrogen sulfide | A gas emitted during decomposition of organic compounds. It also is a byproduct of oil refining and burning. |
| hydrogeology | The study of groundwater, including its origin, occurrence, movement, and quality. |
| hydrology | The scientific study of the properties, distribution, and effects of water in the atmosphere, on the earth's surface, and in soil and rocks. |
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Note: A majority of the terms and definitions are based on the U.S. Environmental Protection Agency's Brownfields Innovative Technology Glossary . Some definitions have been modified/enhanced to support the Tech Tree text. |
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