Table 26.14 Impact Significance Definitions Impact Significance
Definition Major
Very large or large change in receptor condition, both adverse or beneficial, which are likely to be important considerations at a regional or district level because they contribute to achieving national, regional or local objectives, or, could result in exceedance of statutory objectives and / or breaches of legislation.
Moderate Minor
Negligible No impact
82.
Intermediate change in receptor condition, which are likely to be important considerations at a local level.
Small change in receptor condition, which may be raised as local issues but are unlikely to be important in the decision making process.
No discernible change in receptor condition. No impact, therefore no change in receptor condition.
Potential impacts identified as Major and Moderate impacts are deemed to be significant in terms of the EIA and have been avoided or reduced through mitigation, where possible. Minor impacts become more important when considering potential, cumulative impacts or interactions.
83. Embedded mitigation and existing commitments to good practice are discussed in section 26.3.3, and are referred to throughout the impact assessment. The impact assessment takes into account the embedded mitigation before coming to a conclusion of the potential impact to a receptor. If any additional mitigation is required, this is included within the impact assessment in section 26.6, and a description of any residual impact post-mitigation is provided.
Cumulative Impact Assessment 84.
This assessment has considered the following cumulative impact scenarios which take into account the different phases of the proposed project:
Cumulative scenario 1: Open trenches and ducting are installed as part of East Anglia ONE. Cables for East Anglia THREE and East Anglia FOUR are pulled through consecutively; and
85.
Cumulative scenario 2: Open trenches and ducting is installed for East Anglia THREE and cabling for East Anglia FOUR is pulled through
Under both scenarios suggested above separate cable installation works and converter station constructions are proposed for each project. However, East Anglia ONE, East Anglia THREE and East Anglia FOUR would be constructed consecutively rather than simultaneously. As a result there is not anticipated to be a situation
Preliminary Environmental Information May 2014
East Anglia THREE Offshore Windfarm
Chapter 26 Noise and Vibration Page 25
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