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CDOIF
Chemical and Downstream Oil
Industries Forum
CDOIF is a collaborative venture formed to agree strategic areas for
joint industry / trade union / regulator action aimed at delivering health,
safety and environmental improvements with cross-sector benefits.
Supplement to Guideline – ‘Environmental Risk Tolerability for COMAH Establishments’
Complex Site Example v0.0
Page 22 of 35
Figure 7
–
Unmitigated risk contribution as a proportion of the intolerable risk frequency. Results above 100% indicate that an
individual compartment would be capable of presenting an intolerable risk.
In this figure those compartments which are green contribute least to the overall environmental risk for a given receptor
whilst those which are orange and red contribute the most. This combined with a ranked list of compartments and events can
then be used to focus on those areas where mitigation assessments will make the biggest difference. In addition to the
holistic view of risk presented in this figure it is also possible to present site wide data for each individual event type to
identify whether it is individual events or individual compartments which contribute the most to the risk.