flux chamber

Federal Clean Air Act (FCAA)

A federal law passed in 1970 and amended in 1974, 1977 and 1990 which forms the basis for the national air pollution control effort. Basic elements of the act include…

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Flux Chamber

In the case of passive sources, a device is required to perform a direct measurement of the source, from either a solid or liquid surface.  Coverings or ‘hoods’ are usually…

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Hazardous Air Pollutants (HAPs)

Pollutants released into the atmosphere as particles and volatile organic compounds (VOCs) — including the known carcinogens of benzene and toluene — from a variety of sources such as vehicle…

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Micrometeorological method

This is an indirect measurement of passive sources where odour emission is determined by measuring wind velocities and concentrations across the plume profile downwind of the source simultaneously.  The turbulent…

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New Source Review (NSR)

A Clean Air Act requirement that State Implementation Plans must include a permit review,  which applies to the construction and operation of new and modified stationary sources in Non-attainment areas, to…

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Sampling hood

Is a device used to perform odour measurements on active sources such as biofilters.  It essentially is composed of a conical or pyramidal shape that encloses an area of the…

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Source sampling

The process of obtaining an odourous sample.  Various equipment and standard methods applied depending on the source characteristics.  For example, a passive area will require different equipment for sampling than…

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Static flux hood

In the case of passive sources, a device is required to perform a direct measurement of the source.  Coverings or ‘hoods’ are usually used to achieve this and one such…

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