Annex B Summary of Key Potential Environmental Impacts of Offshore CCS Activities

This annex considers the environmental impact of offshore activities, but excludes the health and safety impact of CO2 as this has been addressed previously. It focuses on impacts on the aquatic environment including associated fauna and flora sediments. The marine environment can be divided into shallow and deep-sea areas. Offshore pipelines transporting CO2 are expected to pass both environments, but for most UK situations the pipelines will not enter the deep sea areas; however, some consideration is included here for completeness.

The potential environmental impact of offshore pipelines should be assessed during both the construction and operation phases. The risk of disturbance of trawling fishery during operation is also discussed.