# The Air Quality (Ozone) (Wales) Regulations 2003, Part III: Documentation and review of site selection


Site selection procedures should be fully documented at the classification stage by such means as compass point photographs of the surroundings and a detailed map. Sites should be reviewed at regular intervals with repeated documentation to ensure that selection criteria are still being met.
This requires proper screening and interpretation of the monitoring data in the context of the meteorological and photochemical processes affecting the ozone concentrations measured at the respective site.

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