# The Air Quality (Ozone) (Wales) Regulations 2003, Paragraph 3


The inlet probe should be positioned well away from such sources as furnaces and incineration flues and more than 10m from the nearest road, with distance increasing as a function of traffic intensity.

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Source: https://www.legislation.gov.uk/wsi/2003/1848/schedule/2/paragraph/3 (the official version)
Page: https://openlegislation.uk/air-quality-ozone-wales-regulations-2003/schedule-2/paragraph-3
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.