{
  "url": "https://openlegislation.uk/eu-decision-2009-337/annex-I",
  "json_url": "https://openlegislation.uk/eu-decision-2009-337/annex-I.json",
  "legislation": "eudn/2009/337",
  "legislation_title": "Commission Decision of 20 April 2009 on the definition of the criteria for the classification of waste facilities in accordance with Annex III of Directive 2006/21/EC of the European Parliament and of the Council concerning the management of waste from extractive industries (notified under document number C(2009) 2856) (2009/337/EC)",
  "legislation_url": "https://openlegislation.uk/eu-decision-2009-337",
  "path": "annex/I",
  "kind": "annex",
  "number": "I",
  "heading": "Formula for the calculation of the average yearly increase in stored water within the tailings pond ΔQ as referred in Article 8 paragraph 2",
  "text": "ΔQi (ΔΜi/D) * P, where:\nΔQi yearly increase of stored water in the tailing pond (m3/year) during the year ‘i’\nΔΜi yearly mass of tailings discharged to pond (tonnes dry weight/year) during the year ‘i’\nD average dry bulk density of the deposited tailings (tonnes/m3)\nP average porosity of the sedimented tailings (m3/m3) defined as the ratio of the volume of voids to the total volume of sedimented tailings\nIf exact data are not available, default values of 1,4 tonnes/m3 for the dry bulk density and 0,5 m3/m3 for the porosity should be used.",
  "extent": "E+W+S+N.I.",
  "status": null,
  "version": "current",
  "annotations": [],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/eudn/2009/337/annex/I",
    "retrieved_at": "2026-11-01T15:16:31.275656+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."
}