Natural Resources Wales (NRW) says it has completed its assessment of the sample results of proposed dredged material from the Bristol Channel set for disposal in Welsh waters.
NRW says analysis of the samples by independent experts, against international guidelines, found the chemical and radiological results were within acceptable, safe limits.
Following the results, NRW is satisfied there is no risk from the material to people, the environment, or the wildlife that lives there.
The source of the sediment is from the construction site of the Hinkley Point C power station off the Somerset coast in England and will be put into a disposal site off the coast near Cardiff.
The analysis of the sediment was carried out by the Centre for Environment, Fisheries and Aquaculture Science (Cefas). The results were assessed by NRW’s radiological experts in consultation with Public Health Wales.