Assessor

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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EN13725

In Europe, dynamic olfactometry, is described in detail by the European standard EN 13725. This standard was last released in 2003 and is currently under review for revision. Key elements of…

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Exposure

Exposure is a combination of the amount of a pollutant in the air and the amount of time that person stays in the presence of a pollutant. Exposure determines the…

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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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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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n-butanol

is the reference material outlined in the EN13725 standard.  One of the criteria in order to become an assessor, is to be able to detect n-butanol between 20ppb to 80ppb…

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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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Panel member

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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Panelist Screening

The EN13725 defines the following criteria for panelist screening: Have a detection threshold of n-butanol between 20ppb to 80ppb requires the assessor to be at least 16 years of age…

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Panelist Selection Criteria

See panelist Screening

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