# The Air Quality Limit Values (Wales) Regulations 2002, Paragraph

Extent: E+W

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". The measurement principle is based on the collection on a filter of the PM10 fraction of ambient particulate matter and the gravimetric mass determination.

---
Source: https://www.legislation.gov.uk/wsi/2002/3183/schedule/6/part/IV/paragraph/wrapper30n1 (the official version)
Page: https://openlegislation.uk/air-quality-limit-values-wales-regulations-2002/schedule-6/part-IV/paragraph-wrapper30n1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.