odour monitoring

Assessor

The terms ‘assessor’ and ‘panel member’ are used in the EN13725.  An assessor is a person who participates in odour measurements.  A panel member is an assessor who is qualified…

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Biofilter

A biological process where a microorganisms (bacteria or fungus) is used to remove pollutants and odour from a gaseous waste stream.  The air stream carrying teh pollutants passes through the packing bed…

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Electronic Nose

An electronic nose (e-nose) uses a sensor array that reacts to air pollutants by leaving behind a ‘fingerprint’ that can be attributed to an odour.  It is essentially composed of a sample…

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EN 13725 – YES/NO Mode

The assessor is asked to evaluate gas presented from a specific port and to indicate if an odour is perceived ( YES/NO). The assessor is aware that in some cases…

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EN 13725 – Forced Choice Mode

The assessor is presented with two or more ports, of which one presents the stimulus and the other(s) neutral gas.The location of the stimulus in consecutive presentation is randomly distributed…

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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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FIDOL

FIDOL represents frequency, intensity, duration, offensiveness and location.  FIDOL is used as a means to characterize the effects of an odour annoyance. Characterize an odour by its: Frequency – how…

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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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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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Odour abatement efficiency

The reduction of the odour concentration or the odour flow rate due to an abatement technique, expressed as a fraction (or percentage) of the odour concentration in or the odour…

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