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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.
x
Using Table 2 (Duration/Recovery criteria) in Appendix 4, select a duration
descriptor for the relevant receptor category. These should be unaided
recovery times, without restoration and clean-up activity (though natural
attenuation can be taken into account). These are broad-brush categories,
and as part of the screening process, estimates can be used.
x
Each duration column has a category level assigned to it: 1-4. This is the
harm/duration category.
6.1.4
Determining tolerability boundaries
Determine Tolerability boundaries from the Tolerability Assessment Matrix (Appendix 4
Table 3 -
MATTE tolerability assessment matrix
)
x
Using the harm/severity level (1-4) and the harm/duration category (1-4),
determine the overall unmitigated Consequence Level (A-D) from the matrix.
x
Each consequence level (A-D) has been assigned tolerability thresholds to
define the ALARP band. i.e. Intolerable and Broadly Acceptable frequencies
per receptor, per establishment, per year.
The level of risk posed by the establishment, to each receptor, is then compared with
these respective tolerability criteria, as explained in section 6.2 below.
Guideline – Environmental Risk Tolerability for COMAH Establishments v1.0
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