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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.
5.2
Benefits .................................................................................................................................. 29
5.3
Costs ................................................................................................................................... 29
5.4
Discounting Rates.................................................................................................................. 29
5.5
Evaluation of Environmental Remediation ............................................................................. 29
6.
COMPLETING THE RISK ASSESSMENT ............................................................................ 31
6.1
Part 1 - MATTE definition and thresholds .............................................................................. 31
6.1.1 Identifying the major accident scenarios................................................................................ 32
6.1.2 Determining the level of severity............................................................................................ 32
6.1.3 Assigning a duration/recovery category................................................................................. 32
6.1.4 Determining tolerability boundaries........................................................................................ 33
6.2
Part 2 calculating the establishment risk frequencies ............................................................ 34
6.2.1 Aggregating risk - Examples .................................................................................................. 34
6.2.1.1 Single substance stored in a single tank................................................................................ 36
6.2.1.2 Tank farm or group of tanks containing similar substances................................................... 37
6.2.1.3 Groups (e.g. tank farms) with dissimilar substances/incident consequences........................ 38
6.2.1.4 Comparison with tolerability criteria ....................................................................................... 39
6.2.1.5 Interdependent scenarios ...................................................................................................... 41
7.
ABBREVIATIONS .................................................................................................................. 42
REVISION HISTORY......................................................................................................................... 43
APPENDIX 1 - KEY GUIDANCE ....................................................................................................... 44
APPENDIX 2 – DETR 1999 TABLE REFERENCES......................................................................... 47
APPENDIX 3 – INFORMATION SOURCES...................................................................................... 57
APPENDIX 4 – MATTE TOLERABILITY TABLES ............................................................................ 67
APPENDIX 5 – TABLES TO ASSESS MATTE POTENTIAL ............................................................ 78
Guideline – Environmental Risk Tolerability for COMAH Establishments v1.0
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