{
  "url": "https://openlegislation.uk/environmental-authorisations-scotland-regulations-2018/schedule-22/paragraph-21",
  "json_url": "https://openlegislation.uk/environmental-authorisations-scotland-regulations-2018/schedule-22/paragraph-21.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/21",
  "kind": "paragraph",
  "number": "21",
  "heading": "Special provisions for combustion plants co-incinerating waste",
  "text": "(1) Cproc is to be expressed as a daily average values (mg/Nm3).\n(2) The aggregation rules in paragraph 3 of schedule 21 apply to determining the total rated thermal input of combustion plants.\n(3) Half-hourly average values are only needed for the purpose of calculating the daily average values.\n(4) Cproc for combustion plants referred to in paragraph 6(1) of schedule 21, with the exception of gas turbines and gas engines, are as set out in Table 6—\nTable 6\nCproc for solid fuels with the exception of biomass (O2 content: 6%)\nPolluting substance\n<50 MWth\n50-100 MWth\n100 to 300 MWth\n>300 MWth\nSO2\n-\n400\n300 for peat\n200\n200\nNOx\n-\n300\n400 for pulverised lignite\n200\n200\nDust\n50\n30\n25\nFor peat: 20\n20\nCproc for biomass (O2 content: 6%)\nPolluting substance\n<50 MWth\n50-100 MWth\n100 to 300 MWth\n>300 MWth\nSO2\n-\n200\n200\n200\nNox\n-\n300\n250\n200\nDust\n50\n30\n20\n20\nCproc for liquid fuels (O2 content: 3%)\nPolluting substance\n<50 MWth\n50-100 MWth\n100 to 300 MWth\n>300 MWth\nSO2\n-\n350\n250\n200\nNOx\n-\n400\n200\n150\nDust\n50\n30\n25\n20\n(5) Cproc for combustion plants referred to in paragraph 6(2) of schedule 21, with the exception of gas turbines and gas engines, are as set out in Table 7—\nTable 7\nPolluting substance\n<50 MWth\n50-100 MWth\n100 to 300 MWth\n>300 MWth\nCproc for solid fuels with the exception of biomass (O2 content: 6%)\nSO2\n-\n400\n300 for peat\n200\n300 for peat, except in the case of fluidised bed combustion: 250\n150 for circulating or pressurised fluidised bed combustion or, in the case of peat firing, for all fluidised bed combustion: 200\nNOx\n_\n300\nFor peat: 250\n200\n150\nFor pulverised lignite combustion: 200\nDust\n50\n20\n20\n10\nFor peat: 20\nCproc for biomass (O2 content: 6%)\nSo2\n-\n200\n200\n150\nNOx\n-\n250\n200\n150\nDust\n50\n20\n20\n20\nCproc for liquid fuels (O2 content: 3%)\nSo2\n-\n350\n200\n150\nNOx\n-\n300\n150\n100\nDust\n50\n20\n20\n10\n(6) Total emission limit values (C) for heavy metals (mg/Nm3) expressed as average values over the sampling period of a minimum of 30 minutes and a maximum of 8 hours (O2 content 6% for solid fuels and 3% for liquid fuels) is as provided for in Table 8—\nTable 8\nPolluting substances\nC\nCd + Tl\n0.05\nHg\n0.05\nSb + As + Pb + Cr + Co + Cu + Mn + Ni + V\n0.5\n(7) Total emission limit value (ng/Nm3) for dioxins and furans expressed as average value measured over the sampling period of a minimum of 6 hours and a maximum of 8 hours (O2 content 6% for solid fuels and 3% for liquid fuels) is 0.1.",
  "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/21",
    "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."
}