# 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 benzene if the uncertainty, including the uncertainty due to random sampling, meets the quality objective of 25%. Random sampling must be spread evenly across the year.

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Source: https://www.legislation.gov.uk/wsi/2002/3183/schedule/5/part/I/paragraph/wrapper23n1 (the official version)
Page: https://openlegislation.uk/air-quality-limit-values-wales-regulations-2002/schedule-5/part-I/paragraph-wrapper23n1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.