POCO meaning

POCO (post‑operational clean out) describes the initial make‑safe and decontamination phase carried out once operations stop at an industrial facility, to prepare plant and associated infrastructure for care and maintenance, mothballing or decommissioning. It is not a defined statutory term; it is a widely used industry expression in closure, decommissioning and asset transfer documents and regulator correspondence across the UK and Ireland. Typical POCO activities include: identifying and removing residual inventories (hydrocarbons, chemicals and hazardous substances); isolating, de‑energising and depressurising systems; purging and cleaning lines and vessels; classifying, consigning and disposing of waste; securing equipment; and verifying the condition of the site with records to support compliance and, where applicable, permit surrender. Legally, POCO supports compliance with environmental and safety regimes, including the Environmental Permitting Regulations (England and Wales), PPC (Scotland and Northern Ireland) and Industrial Emissions licensing (Ireland), COMAH/Seveso, HSWA, DSEAR, waste duty of care and related permit conditions. Regulators commonly involved include the HSE, EA/NRW/SEPA/DAERA and the EPA (Ireland). Usage and expectations are broadly consistent across England & Wales, Scotland, Northern Ireland and Ireland, though specific permitting frameworks and guidance differ. Inadequate POCO can delay care‑and‑maintenance status, permit surrender or decommissioning approvals and increase environmental and safety liabilities.