{
  "url": "https://openlegislation.uk/eu-regulation-2004-648/annex-VIII/division-1/division-1.7",
  "json_url": "https://openlegislation.uk/eu-regulation-2004-648/annex-VIII/division-1/division-1.7.json",
  "legislation": "eur/2004/648",
  "legislation_title": "Regulation (EC) No 648/2004 of the European Parliament and of the Council of 31 March 2004 on detergents (Text with EEA relevance)",
  "legislation_url": "https://openlegislation.uk/eu-regulation-2004-648",
  "path": "annex/VIII/division/1/division/1.7",
  "kind": "division",
  "number": "1.7",
  "heading": "Calculation of biodegradability",
  "text": "The percentage degradation of surfactant must be calculated every day on the basis of the surfactant content in mg/l of the synthetic sewage and of the corresponding effluent accumulated in vessel F.\nThe degradability values thus obtained should be presented graphically as in Figure 3.\nThe degradability of the surfactant should be calculated as the arithmetic mean of the values obtained over the twenty-one days that follow the running-in and acclimatisation period, during which degradation has been regular and the operation of the plant trouble-free. In any event the duration of the running-in period should not exceed six weeks.\nThe daily degradation values are calculated to the nearest 0,1 % but the final result is given to the nearest whole number.\nIn some cases it may be permissible to reduce the frequency of sampling but at least fourteen results collected over the twenty-one days which follow the running-in period should be used in calculating the average.",
  "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/eur/2004/648/annex/VIII/division/1/division/1.7",
    "retrieved_at": "2026-11-01T14:55:38.850310+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."
}