 PCM (phase contrast microscopy) :
this can be used to measure the concentration of fibres solely from morphological criteria. It is the standard method for industrial hygiene counts for WHO fibres, which are defined as being structures less than 3 µm in diameter, at least 5 µm in length, and having a length/diameter ratio of more than 3.
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PCS :
French nomenclature for occupations and socioprofessional categories, 1994 edition, Paris (French National Institute of Statistics and Economic Studies).
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Personal sample :
the operator carries the pump while the occupational task that gives rise to the exposure is performed. The filter is located in the breathing zone, so this type of sampling is very suitable for measuring the occupational exposure of a worker to fibres.
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Primary/secondary production (MMMF) :
primary production designates the manufacture of the fibres, from mixing the starting materials to obtaining the fibre structure in bulk form, of threads for filaments or polymers (blanket roll) and which will be used as such. Sometimes, these so-called "primary" products are used as starting materials in the manufacture of more highly processed materials known as "secondary products", such as modules, textiles, felts, shells, ceiling panels, adhesives , acoustic tiles…
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Probability :
this in fact indicates the proportion of individuals exposed in the job over one year during a given historical period : 0 : no exposure ; 1 : 0 < probability < 10 % (improbable) ; 2 : 10 % < probability < 50 % (possible) ; 3 : 50 % < probability < 90 % (probable) ; 4 : probability > 90 % (certain).
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