Valero Milford Haven oil spill: Seabed to be assessed
The scale of pollution caused by an oil spill on the Welsh coast is still being evaluated in order to protect "sensitive seabed habitats".
Between 7,000 to 10,000 litres of oil leaked from a fuel line into the Milford Haven estuary on 3 January.
While the loss of oil was limited and very little oil reached land, booms will remain in place to protect salt marshes and habitats in the estuary.
The Welsh Government said the slick was no longer visible.
- Fuel pipelines shut after refinery spill
- Heavy oil spill 'up to 10,000 litres'
- Oil in estuary from 'pipe leak' contained
Natural Resources Wales has also issued an enforcement notice to Valero, which operates the refinery in Pembrokeshire, to stop the use of the two fuel pipelines on the jetty.
A statement by Environment Secretary Leslie Griffiths said surveys were under way and the clean-up would continue as required.