Table 12.10 Impact significance definitions Impact Significance


Definition Major


Very large or large change in receptor, either adverse or beneficial, which are important at a population (national or international) level because they contribute to achieving national or regional objectives, or, expected to result in exceedence of statutory objectives and / or breaches of legislation.


Moderate Minor


Negligible No change


Intermediate or large change in receptor, which may to be important considerations at national or regional population level. Potential to result in exceedence of statutory objectives and / or breaches of legislation.


Small change in receptor, which may be raised as local issues but are unlikely to be important at a regional population level.


No discernible change in receptor. No impact, therefore no change in receptor.


12.4.3.4 Confidence in assessment 75.


As presented in Chapter 6 Environmental Impact Assessment Methodology, an overview of the confidence of the data and information underpinning the assessment will be presented. Confidence will be High, Medium or Low depending on the type of data (quantitative, qualitative or lacking) as well as the source of information (e.g. peer reviewed publications, grey literature) and its applicability to the assessment.


12.4.4 Cumulative impact assessment 76.


The CIA will identify areas where the predicted impacts of the construction, operation, maintenance and decommissioning of the project could interact with impacts from different industry sectors within the same regional and impact sensitive receptors.


77. The Planning Inspectorate Advice Note 9 states that:


“In assessing cumulative impacts, other major developments should be identified through consultation with the local planning authorities and other relevant authorities on the basis of those that are:


Under construction; Permitted application(s) but not yet implemented; Submitted application (s) but not yet determined; Projects on the Planning Inspectorate’s Programme of Projects;


Preliminary Environmental Information May 2014


East Anglia THREE Offshore Windfarm


Chapter 12 Marine Mammal Ecology Page 36


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