Environmental statement - Flyndre and Cawdor - Maersk Oil

Minor
accidental event
Infrastructure All infield subsea
infrastructure;
manifolds, wells,
24.66km pipeline &
control umbilical
Noise Surface & subsea noise
produced during
operations, of which
piling is likely to be the
dominant sound source
Chemical spills Chemical storage‐
accidental spills, leaks,
containment damage
Disturbance of benthic communities living in the
trenched/ploughed areas & the possible wider
smothering caused by the resultant sediment
plume. Potential impacts to fishing activities.
Likelihood Consequence Risk
5 1 Low
Generates elevated sound levels which can affect
the behaviour of fish and marine mammals in the
area.
Likelihood Consequence Risk
5 2 Moderate
May result in a variety of impacts including
increased chemical or biochemical oxygen
demand, toxicity, persistence, bioaccumulation in
animals
Likelihood Consequence Risk
2 2 Low
Flyndre and Cawdor Development Environmental Statement
Appendix B – Environmental Impact Assessment
Minimisation of foot‐ print
through design.
Optimisation of pipeline
route.
Impact area is expected to
rapidly restore/ recolonise.
Adherence t principles
within JNCC piling protocol
e.g. use of MMO’s during
piling activity.
Optimised quantities
procured & stored. COSHH,
Task Hazard Assessments
are completed and MSDS
sheets are available. All
transfer operations
suspended in rough
weather. All bulk hoses and
connections must be
inspected before and after
use by competent
personnel. Chemicals
stored in tote tank area.
OPEP is implemented as
appropriate in the result of
a spill as per Emergency
Response Process.
Temporal physical
disturbance effect
on local benthic
communities
recovery expected
with time. Hard
structures will
attract different
species.
Short term impact
upon sensitive
species, no impacts
beyond the
installation period
None envisaged.
B ‐ 10 D/4114/2011