Offshore Chemical Notification Scheme (OCNS)
The Offshore Chemical Notification Scheme (OCNS) applies to chemicals that are intended for use and discharge in the exploration, exploitation and associated offshore processing of petroleum in the UK and Netherlands.
The scheme is regulated in the UK by the Department for Energy Security and Net Zero (DESNZ) using scientific and environmental advice from Cefas.
The scheme does not apply to chemicals that might otherwise be used on a ship, helicopter or other offshore structure. Products used solely within domestic accommodation areas - such as additives to potable water systems, paints and other coatings, fuels, lubricants, fire-fighting foams, hydraulic fluids used in cranes and other machinery - are also exempt.
If there is any doubt about whether a chemical should be included in a UK risk assessment, then operators are advised to consult the UK's Department for Business, Energy and Industrial Strategy or Cefas. All queries regarding risk assessment in the Netherlands should be directed to State Supervision of Mines.