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The reference method for the sampling and measurement of PM10 will be that described in EN 12341 “Air Quality – Field Test Procedure to Demonstrate Reference Equivalence of Sampling Methods for the PM10 fraction of particulate matter"M1. The measurement principle is based on the collection on a filter of the PM10 fraction of ambient particulate matter and the gravimetric mass determination.

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M1

European Standards Institute “CEN" publication reference BSEN 12341, obtainable from the British Standards Institute “BSI" as for footnote (a) above