22.4.3.3 Impact significance Following the identification of receptor value and sensitivity and magnitude of the


40.


effect, it is possible to determine the significance of the impact based on the matrix presented in Table 22.9 below.


Table 22.9. Impact Significance Matrix Sensitivity


High High


Medium Low


Major Major


Negligible Minor Medium Major Moderate Moderate Minor Negligible Magnitude Low


Moderate Minor Minor


Negligible Negligible Minor


Negligible Negligible Negligible


No change


No impact No impact No impact No impact


41.


As with the definitions of magnitude and sensitivity, the matrix used for a topic is


clearly defined by the assessor within the context of that assessment. The impact significance categories are divided as shown in Table 22.10.


Table 22.10. Impact Significance Definitions Impact Significance


Definition Major


Very large or large changes in receptor condition, either 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 exceedence of statutory objectives and / or breaches of legislation.


Moderate Minor


Negligible No change


42.


Intermediate change in receptor condition, which are likely to be important considerations at a local to regional level.


Small change in receptor condition, which may be raised as local issues but are unlikely to be significant at a regional level or above


No discernible change in receptor condition. No impact, therefore no change in receptor condition. Potential impacts identified asmajor andmoderate 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.


Preliminary Environmental Information May 2014


East Anglia THREE Offshore Windfarm


Chapter 22 Land Use Page 24


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