{
  "url": "https://openlegislation.uk/eu-decision-2017-2117/annex/division-n2/division-5",
  "json_url": "https://openlegislation.uk/eu-decision-2017-2117/annex/division-n2/division-5.json",
  "legislation": "eudn/2017/2117",
  "legislation_title": "Commission Implementing Decision (EU) 2017/2117 of 21 November 2017 establishing best available techniques (BAT) conclusions, under Directive 2010/75/EU of the European Parliament and of the Council, for the production of large volume organic chemicals (notified under document C(2017) 7469) (Text with EEA relevance)",
  "legislation_url": "https://openlegislation.uk/eu-decision-2017-2117",
  "path": "annex/division/n2/division/5",
  "kind": "division",
  "number": null,
  "heading": "Averaging periods for emissions to water",
  "text": "Unless stated otherwise, the averaging periods associated with the environmental performance levels associated with the best available techniques (BAT-AEPLs) for emissions to water expressed in concentrations are defined as follows.\nTime-proportional composite samples can be used provided that sufficient flow stability can be demonstrated.\nAveraging period\nDefinition\nAverage of values obtained during one month\nFlow-weighted average value from 24-hour flow-proportional composite samples obtained during 1 month under normal operating conditions\nAverage of values obtained during one year\nFlow-weighted average value from 24-hour flow-proportional composite samples obtained during 1 year under normal operating conditions\nFlow-weighted average concentrations of the parameter (cw ) are calculated using Equation 3:\nEquation 3:\nc w = ∑ i = 1 n c i q i ∕ ∑ i = 1 n q i\nwhere:\nn number of measurement periods;\nci average concentration of the parameter during ith measurement period;\nqi average flow rate during ith measurement period.\nWhere BAT-AEPLs refer to specific emission loads, expressed as load of emitted substance per unit of production output, the average specific emission loads are calculated using Equation 1.",
  "extent": "E+W+S+N.I.",
  "status": null,
  "version": "current",
  "annotations": [
    {
      "type": "footnote",
      "label": "f1",
      "text": "Time-proportional composite samples can be used provided that sufficient flow stability can be demonstrated."
    }
  ],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/eudn/2017/2117/annex/division/n2/division/5",
    "retrieved_at": "2026-11-01T15:13:18.480772+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."
}