{
  "url": "https://openlegislation.uk/air-quality-limit-values-regulations-northern-ireland-2002/schedule-6/part-IV",
  "json_url": "https://openlegislation.uk/air-quality-limit-values-regulations-northern-ireland-2002/schedule-6/part-IV.json",
  "legislation": "nisr/2002/94",
  "legislation_title": "The Air Quality Limit Values Regulations (Northern Ireland) 2002",
  "legislation_url": "https://openlegislation.uk/air-quality-limit-values-regulations-northern-ireland-2002",
  "path": "schedule/6/part/IV",
  "kind": "part",
  "number": "IV",
  "heading": "REFERENCE METHOD FOR THE SAMPLING AND MEASUREMENT OF PM10",
  "text": "The reference method for the sampling and measurement of PM10 will be that described in EN 12341 “Air Quality—Field Test Procedure to Demonstrate Reference Equivalence of Sampling Methods for the PM10 fraction of particulate matter”. The measurement principle is based on the collection on a filter of the PM10 fraction of ambient particulate matter and the gravimetric mass determination.",
  "extent": "N.I.",
  "status": null,
  "version": "current",
  "annotations": [
    {
      "type": "I",
      "label": "I1",
      "text": "Sch. 6 Pt. IV in operation at 1.5.2002, see reg. 1"
    },
    {
      "type": "I",
      "label": "I2",
      "text": "Sch. 6 in operation at 1.5.2002, see reg. 1"
    },
    {
      "type": "footnote",
      "label": "f1",
      "text": "European Standards Institute “CEN” publication reference BSEN 12341, obtainable from the British Standards Institute “BSI” as for footnote above"
    }
  ],
  "outstanding_effects": [
    {
      "type": "words substituted",
      "affecting": "nisr/2002/357",
      "affecting_title": "The Air Quality Limit Values (Amendment) Regulations (Northern Ireland) 2002"
    },
    {
      "type": "added",
      "affecting": "nisr/2002/357",
      "affecting_title": "The Air Quality Limit Values (Amendment) Regulations (Northern Ireland) 2002"
    }
  ],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/nisr/2002/94/schedule/6/part/IV",
    "retrieved_at": "2026-10-29T02:08:23.952723+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."
}