Environmental Statement - Maersk Oil
Environmental Statement - Maersk Oil
Environmental Statement - Maersk Oil
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4 ‐ 2<br />
Level Definition<br />
Severe<br />
(5)<br />
Major<br />
(4)<br />
Moderate<br />
(3)<br />
Minor<br />
(2)<br />
Negligible<br />
(1)<br />
Table 4 ‐ 2 Definition of magnitude of environmental effects.<br />
Balloch Field Development <strong>Environmental</strong> <strong>Statement</strong><br />
Section 4 <strong>Environmental</strong> Assessment Methodology<br />
Change in ecosystem leading to long term (greater than 10 years) damage with poor<br />
potential for recovery to an area 2 hectares of more, or to internationally or nationally<br />
protected populations, habitats or sites.<br />
Likely effect on human health.<br />
Long term, substantial loss of private users of public finance.<br />
Change in ecosystem leading to medium term (greater than 2 years) damage with recovery<br />
likely within between 2 and 10 years to an area 2 hectares or more, or to internationally or<br />
nationally protected species, habitats or sites.<br />
Change in ecosystem leading to short term damage with likelihood for recovery within 2<br />
years to an area 2 hectares or less, or to protected or locally important sites.<br />
Possible but unlikely effect on human health.<br />
May cause nuisance.<br />
Possible short term minor loss to private users or public finances.<br />
Change is within scope of existing variability but potentially detectable.<br />
Effects are unlikely to be noticed or measured.<br />
4.3. COMBINING LIKELIHOOD AND CONSEQUENCES TO ESTABLISH RISK<br />
The overall environmental risk of each environmental aspect/activity was assessed using the<br />
combination of the magnitude and likelihood scores in Table 4 ‐ 3 below.<br />
Likelihood of<br />
occurrence<br />
Table 4 ‐ 3 <strong>Environmental</strong> risk classification matrix.<br />
Magnitude of Effect<br />
5 4 3 2 1<br />
5 High High Moderate Moderate Low<br />
4 High High Moderate Moderate Low<br />
3 High High Moderate Low Low<br />
2 High High Moderate Low Low<br />
1 High Moderate Low Low Low<br />
This process was undertaken for all identified aspects with the results presented in Appendix B. For<br />
those aspects identified as being of moderate risk, additional mitigation measures were considered to<br />
demonstrate that the risk was as low as reasonably practicable (ALARP). Those aspects identified as<br />
moderate risk are discussed in Section 5.
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