{
  "url": "https://openlegislation.uk/air-quality-standards-wales-regulations-2007/schedule-10/paragraph-4",
  "json_url": "https://openlegislation.uk/air-quality-standards-wales-regulations-2007/schedule-10/paragraph-4.json",
  "legislation": "wsi/2007/717",
  "legislation_title": "The Air Quality Standards (Wales) Regulations 2007",
  "legislation_url": "https://openlegislation.uk/air-quality-standards-wales-regulations-2007",
  "path": "schedule/10/paragraph/4",
  "kind": "paragraph",
  "number": "4",
  "heading": "Substances",
  "text": "A list of volatile organic compounds recommended for measurement by Directive 2002/3/EC is given in the table below—\nEthane\n1-Butene\nIsoprene\nEthyl benzene\nEthylene\ntrans-2-Butene\nn-Hexane\nm+p-Xylene\nAcetylene\ncis-2-Butene\ni-Hexane\no-Xylene\nPropane\n1.3-Butadiene\nn-Heptane\n1,2,4-Trimeth. Benzene\nPropene\nn-Pentane\nn-Octane\n1,2,3-Trimeth. Benzene\nn-Butane\ni-Pentane\ni-Octane\n1,3,5-Trimeth. Benzene\ni-Butane\n1-Pentene\nBenzene\nFormaldehyde\n2-Pentene\nToluene\nTotal non-methane hydrocarbons",
  "extent": null,
  "status": null,
  "version": "current",
  "annotations": [
    {
      "type": "footnote",
      "label": "f1",
      "text": "A full reference for this Directive is given at regulation 2(2)(d)."
    }
  ],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/wsi/2007/717/schedule/10/paragraph/4",
    "retrieved_at": "2026-10-29T00:01:33.213395+00:00"
  },
  "licence": "Open Government Licence v3.0",
  "licence_url": "https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/",
  "attribution": "Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives."
}