{
  "url": "https://openlegislation.uk/environmental-authorisations-scotland-regulations-2018/schedule-22/paragraph-18",
  "json_url": "https://openlegislation.uk/environmental-authorisations-scotland-regulations-2018/schedule-22/paragraph-18.json",
  "legislation": "ssi/2018/219",
  "legislation_title": "The Environmental Authorisations (Scotland) Regulations 2018",
  "legislation_url": "https://openlegislation.uk/environmental-authorisations-scotland-regulations-2018",
  "path": "schedule/22/paragraph/18",
  "kind": "paragraph",
  "number": "18",
  "heading": null,
  "text": "(1) All emission limit values are to be calculated—\n(a) at a temperature of 273.15K,\n(b) a pressure of 101.3kPa, and\n(c) after correcting for the water vapour content of the waste gases.\n(2) Emission limit values are standardised at 11% oxygen in waste gas unless sub-paragraph (3) applies.\n(3) This sub-paragraph applies to—\n(a) the incineration of mineral waste oil, in which case, they are standardised at 3% oxygen, and\n(b) the circumstances referred to in paragraph 25(7)(c) and (8) of this schedule,\n(4) Daily average emission limit values (mg/Nm3) for the polluting substances listed in column 1 of Table 2 are as listed in column 2.\nTable 2\nTotal dust\n10\nGaseous and vaporous organic substances, expressed as total organic\ncarbon (TOC)\n10\nHydrogen chloride (HCl)\n10\nHydrogen fluoride (HF)\n1\nSulphur dioxide (SO2)\n50\nNitrogen monoxide (NO) and nitrogen dioxide (NO2), expressed as NO2\nfor existing waste incineration plants with a nominal capacity exceeding\n6 tonnes per hour or new waste incineration plants\n200\nNitrogen monoxide (NO) and nitrogen dioxide (NO2), expressed as NO2\nfor existing waste incineration plants with a nominal capacity of\n6 tonnes per hour or less\n400\n(5) Half-hourly average emission limit values (mg/Nm3) for the polluting substances listed in column 1 of Table 3 are as listed in columns 2 and 3.\nTable 3\n(100%) A\n(97%) B\nTotal dust\n30\n10\nGaseous and vaporous organic substances, expressed\nas total organic carbon (TOC)\n20\n10\nHydrogen chloride (HCl)\n60\n10\nHydrogen fluoride (HF)\n4\n2\nSulphur dioxide (SO2)\n200\n50\nNitrogen monoxide (NO) and nitrogen dioxide\n(NO2), expressed as NO2 for existing waste incineration plants with a nominal capacity exceeding\n6 tonnes per hour or new waste incineration plants\n400\n200\n(6) Average emission limit values (mg/Nm3) for the heavy metals in column 1 of Table 4 are as listed in column 2 (over a sampling period of a minimum of 30 minutes and a maximum of 8 hours) and cover the gaseous and vapour forms of the relevant heavy metal emissions and their compounds.\nTable 4\nCadmium and its compounds, expressed as cadmium (Cd)\nTotal of Cd + Tl and their compounds: 0.05\nThallium and its compounds, expressed as thallium (Tl)\nMercury and its compounds, expressed as mercury (Hg)\nTotal: 0.05\nAntimony and its compounds, expressed as antimony (Sb)\nTotal of Sb + As + Pb + Cr + Co + Cu + Mn + Ni + V and their compounds: 0.5\nArsenic and its compounds, expressed as arsenic (As)\nLead and its compounds, expressed as lead (Pb)\nChromium and its compounds, expressed as chromium (Cr)\nCobalt and its compounds, expressed as cobalt (Co)\nCopper and its compounds, expressed as copper (Cu)\nManganese and its compounds, expressed as manganese (Mn)\nNickel and its compounds, expressed as nickel (Ni)\nVanadium and its compounds, expressed as vanadium (V)\n(7) The average emission limit value (ng/Nm3) for dioxins and furans over a sampling period of a minimum of 6 hours and a maximum of 8 hours is 0.1, which refers to the total concentration of dioxins and furans calculated in accordance with Chapter 2 of this schedule.\n(8) Emission limit values (mg/Nm3) for carbon monoxide (CO) in the waste gases are—\n(a) 50 as a daily average value,\n(b) 100 as a half-hourly average value,\n(c) 150 as a 10-minute average value,\n(9) SEPA may grant exemptions from the emission limit values in sub-paragraph (8) for waste incineration plants using fluidised bed technology, in which case, the emission limit value for carbon monoxide (CO) must be set at no more than 100 mg/Nm3 as an hourly average value.\n(10) Emission limit values applicable in the circumstances described in paragraphs 5(1)(g) and 6(k) and (l) of this schedule are—\n(a) the total dust concentration in the emissions into the air of a waste incineration plant must not exceed 150 mg/Nm3 expressed as a half-hourly average,\n(b) the air emission limit values for TOC and CO set out in sub-paragraph (5) and (8) must not be exceeded.",
  "extent": null,
  "status": null,
  "version": "current",
  "annotations": [
    {
      "type": "F",
      "label": "F1",
      "text": "Sch. 22 inserted (1.11.2025) by The Environmental Authorisations (Scotland) Amendment Regulations 2025 (S.S.I. 2025/165), reg. 1(2), sch. 13 (with sch. 23)"
    }
  ],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/ssi/2018/219/schedule/22/paragraph/18",
    "retrieved_at": "2026-10-28T21:11:56.403037+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."
}