{
  "url": "https://openlegislation.uk/environmental-authorisations-scotland-regulations-2018/schedule-21/paragraph-29",
  "json_url": "https://openlegislation.uk/environmental-authorisations-scotland-regulations-2018/schedule-21/paragraph-29.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/21/paragraph/29",
  "kind": "paragraph",
  "number": "29",
  "heading": "Emission limit values for NOx and CO for gas turbines (including CCGT) using middle and light distillates as liquid fuels",
  "text": "(1) Emission limit values (mg/Nm3) for NOx and CO for gas fired combustion plants are as set out in Table 10—\nTable 10\nNOx\nCO\n(1)For single cycle gas turbines having an efficiency greater than 35% – determined at ISO base load conditions – the emission limit value for NOx is 50xη/35 where η is the gas turbine efficiency at ISO base load conditions expressed as a percentage.\nCombustion plants other than gas turbines\nand gas engines\n100\n100\nGas turbines (including CCGT)\n50\n100\nGas engines\n75\n100\n(2) For gas turbines (including CCGT), the NOx and CO emission limit values set out in this point apply only above 70% load.\n(3) Gas turbines and gas engines for emergency use that operate less than 500 operating hours per year are not covered by the emission limit values set out in this paragraph.",
  "extent": null,
  "status": null,
  "version": "current",
  "annotations": [
    {
      "type": "F",
      "label": "F1",
      "text": "Sch. 21 inserted (1.11.2025) by The Environmental Authorisations (Scotland) Amendment Regulations 2025 (S.S.I. 2025/165), reg. 1(2), sch. 12 (with sch. 23)"
    },
    {
      "type": "footnote",
      "label": "f1",
      "text": "(1)For single cycle gas turbines having an efficiency greater than 35% – determined at ISO base load conditions – the emission limit value for NOx is 50xη/35 where η is the gas turbine efficiency at ISO base load conditions expressed as a percentage."
    }
  ],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/ssi/2018/219/schedule/21/paragraph/29",
    "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."
}