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

Extent: E+W

The National Assembly may allow for random measurements to be made instead of continuous measurements for particulate matter and lead by methods for which accuracy within the 95% confidence interval with respect to continuous monitoring has been demonstrated to be within 10%. Random sampling must be spread evenly over the year.

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Source: https://www.legislation.gov.uk/wsi/2002/3183/schedule/5/part/I/paragraph/wrapper18n1 (the official version)
Page: https://openlegislation.uk/air-quality-limit-values-wales-regulations-2002/schedule-5/part-I/paragraph-wrapper18n1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.