Page 65 - Alderney Regional Environmental Assessment of Renewable Energy: Environmental Report
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Alderney
Regional Environmental Assessment of Renewable Energy:
Environmental Report
4.3.2.6
Summary
Table 9.
Assessment of the potential effects of the Draft Plan on water quality
Development
Phase
Impact Pathway
Exposure to Change
(Magnitude and
Likelihood)
Sensitivity of
Change
Importance of
Feature
Significance
Mitigation
Residual Impact
Tidal Stream
Turbines
Survey
Toxic contamination (spillage)
N-L
N-L
N
Insignificant
-
-
Construction
Toxic contamination (spillage)
N-L
N-L
N
Insignificant
-
-
Non-toxic contamination
L
N-L
N
Insignificant
-
-
Toxic contamination (sediment release)
N-L
N-L
N
Insignificant
-
-
Operation
Toxic contamination (spillage)
N-L
N-L
N
Insignificant
-
-
Decommissioning
Toxic contamination (spillage)
N-L
N-L
N
Insignificant
-
-
Non-toxic contamination
L
N-L
N
Insignificant
-
-
Toxic contamination (sediment release)
N-L
N-L
N
Insignificant
-
-
Cable Routing
Survey
Toxic contamination (spillage)
N-L
N-L
N
Insignificant
-
-
Construction
Toxic contamination (spillage)
N-L
N-L
N
Insignificant
-
-
Non-toxic contamination
N-L
N-L
N
Insignificant
-
-
Toxic contamination (sediment release)
L
N-L
N
Insignificant
-
-
Operation
Toxic contamination (spillage)
N-L
N-L
N
Insignificant
-
-
Decommissioning
Toxic contamination (spillage)
N-L
N-L
N
Insignificant
-
-
Non-toxic contamination
N-L
N-L
N
Insignificant
-
-
Toxic contamination (sediment release)
L
N-L
N
Insignificant
-
-
Offshore
Substations
Survey
Toxic contamination (spillage)
N-L
N-L
N
Insignificant
-
-
Construction
Toxic contamination (spillage)
N-L
N-L
N
Insignificant
-
-
Non-toxic contamination
L
N-L
N
Insignificant
-
-
Toxic contamination (sediment release)
N-L
N-L
N
Insignificant
-
-
Operation
Toxic contamination (spillage)
N-L
N-L
N
Insignificant
-
-
Decommissioning
Toxic contamination (spillage)
N-L
N-L
N
Insignificant
-
-
Non-toxic contamination
L
N-L
N
Insignificant
-
-
Toxic contamination (sediment release)
N-L
N-L
N
Insignificant
-
-
N
Negligible
L
Low
M
Medium/moderate
H
High
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