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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 26 of 35
Figure 10
–
Mitigation Review Process
Screen Against
Tolerability
Criteria
REFINE
ASSESSMENTS
OR
TAKE
Broadly
Acceptable
Sum Risks for
Compartment
and by Pathway
Assessment
Complete
ALARP Workshop,
Qualitative
Appraisals
ALARP
Intolerable
Potential
Environmental
Risk Identified
Apply Quantified
Safety Measures
Product
Category
Adjustment
Detailed
Assessments
Process Release
Mobility
Adjustment
Toxicity
Adjustment
Safety Measure
1, Secondary
Containment
Safety Measure
2, Tertiary
Containment
Release to Bund
Further Detailed
Assessment for
Release
Requited
No Further
Adjustment
NO
Assess if Ground
Penetration Risk
Exists
NO
No Significant
Environmental
Risk Potential
Quantify risks via
penetration and
migration
YES
Apply Adjustment
Factor
Assess Potential
Extent of Impact
YES
Apply Adjustment
Factor
Calculate
Mitigated Risk
Frequency
YES
YES
NO
NO
Assess Bund
Material
Concrete
Apply Adjustment
Factor
Incorporate
Emergency
Response
Assess Drainage
/ Tertiary
Containment
Apply Adjustment
Factor based on
Volumes