{
  "url": "https://openlegislation.uk/air-quality-standards-wales-regulations-2007/schedule-9/part-4",
  "json_url": "https://openlegislation.uk/air-quality-standards-wales-regulations-2007/schedule-9/part-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/9/part/4",
  "kind": "part",
  "number": "4",
  "heading": "Other reference methods",
  "text": "Reference method\nSampling and analysis of polycyclic aromatic hydrocarbons in ambient air\nA method based on manual PM10 sampling equivalent to EN 12341\nSampling and analysis of mercury in ambient air\nAn automated method based on Atomic Absorption Spectrometry or Atomic Fluorescence Spectrometry\nSampling and analysis of the deposition of Group B pollutants, mercury, and polycyclic aromatic hydrocarbons\nA method based on the exposition of cylindrical deposit gauges with standardised dimensions",
  "extent": null,
  "status": null,
  "version": "current",
  "annotations": [],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/wsi/2007/717/schedule/9/part/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."
}