{
  "url": "https://openlegislation.uk/control-of-substances-hazardous-to-health-regulations-1988/schedule-4",
  "json_url": "https://openlegislation.uk/control-of-substances-hazardous-to-health-regulations-1988/schedule-4.json",
  "legislation": "uksi/1988/1657",
  "legislation_title": "The Control of Substances Hazardous to Health Regulations 1988",
  "legislation_url": "https://openlegislation.uk/control-of-substances-hazardous-to-health-regulations-1988",
  "path": "schedule/4",
  "kind": "schedule",
  "number": "4",
  "heading": "SPECIFIC SUBSTANCES AND PROCESSES FOR WHICH MONITORING IS REQUIRED",
  "text": "Column 1\nColumn 2\nSubstance or Process\nMinimum Frequency\nVinyl chloride monomer.\nContinuous or in accordance with a procedure approved by the Health and Safety Commission.\nVapour or spray given off from vessels at which an electrolytic chromium process is carried on, except trivalent chromium.\nEvery 14 days.",
  "extent": null,
  "status": null,
  "version": "current",
  "annotations": [],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/uksi/1988/1657/schedule/4",
    "retrieved_at": "2026-10-29T15:57:35.141344+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."
}