Brownfields- are abandoned, idled, or under-used industrial and commercial facilities where expansion or redevelopment is complicated by real or perceived environmental contaminations.

TCE-The chemical compound trichloroethylene is a chlorinated hydrocarbon commonly used as an industrial solvent. It is a clear non-flammable liquid with a sweet smell. When inhaled, trichloroethylene, as with any anesthetic gas, depresses the central nervous system. Its symptoms are similar to those of alcohol intoxication, beginning with headache, dizziness, and confusion and progressing with increasing exposure to unconsciousness. Respiratory and circulatory depression from any anesthetic can result in death if administration is not carefully controlled. TCE has been found to be a carcinogen, meaning it could cause cancer.

Solvent-A solvent is a liquid or gas that dissolves a solid, liquid, or gaseous solute, resulting in a solution.

Carcinogen- The term carcinogen refers to any substance, radionuclide or radiation that is an agent directly involved in the promotion of cancer or in the facilitation of its propagation. For example: TCE, PCB, VOC, Radon, Asbestos, and Tobacco.

PCB-Polychlorinated biphenyls (PCBs) are a class of organic compounds with 1 to 10 chlorine atoms attached to biphenyl which is a molecule composed of two benzene rings each containing six carbon atoms. A few studies of workers indicate that PCBs were associated with specific kinds of cancer in humans, such as cancer of the liver and biliary tract.

PCBs were used for: coolants and insulating fluids for transformers and capacitors, plasticizers in paints and cements, stabilizing additives in flexible PVC coatings of electrical wiring and electronic components, pesticide extenders, cutting oils, reactive flame retardants, lubricating oils, hydraulic fluids, sealants (for caulking in schools and commercial buildings, adhesives, wood floor finishes

VOC- Volatile organic compounds (VOCs) are organic chemical compounds that have high enough vapor pressures under normal conditions to significantly vaporize and enter the atmosphere. VOCs are sometimes accidentally released into the environment, where they can damage soil and groundwater. Vapours of VOCs escaping into the air contribute to air pollution.

CFC-Chlorofluorocarbons (CFC) are compounds containing chlorine, fluorine and carbon only, that is they contain no hydrogen. They were formerly used widely in industry, for example as refrigerants, propellants, and cleaning solvents. CFCs cause holes in the ozone layer, which in the future may lead to global warming.