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6.1
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.
6.
Completing the risk assessment
Risk assessments can be completed in two parts:
x
Part 1 – MATTE Definition and Thresholds, refer to section 6.1
x
Part 2 – Risk assessment process, refer to section 6.2
When considering receptors with MATTE potential, note that the Safety Report
Assessment Manual (SRAM) indicates that it is reasonable to screen within 10km of the
site. However, for linear pathways (such as rivers) this distance may be longer.
Part 1 - MATTE definition and thresholds
With reference to sections 3 and 4, the Source-Pathway-Receptor approach described in
the flowchart below can be used to identify those scenarios from the establishment which
could harm each environmental receptor:
4
C
D
D
3
B
C
D
2
A
B
C
1
1
2
3
4
Severity ofHarm
Harm Duration Category
A
BroadlyAcceptable
Frequencyper
receptorperestablishment
per
year
1.0EͲ02
1.0EͲ03
1.0EͲ05
Consequence
Level
(less
than)
(greater
than)
1.0EͲ05
B
C
1.0EͲ06
1.0EͲ04
D
Intolerable
1.0EͲ04
1.0EͲ07
ReceptorType
Significant
Severe
Major
Catastrophic
While
this
levelofharmmight
be
significantpollution,
it
isnot
consideredaMATTE.
DETRCriteriaͲthe
lowest
level
ofharm
thatmightbe
consideredMATTE.
Harm
/Severity
LevelͲ>
1
2
3
4
Row
DETR
Table
Ref
Description
Short
term
Medium
term
Long
term
Very
long
term
Harmwith
such
short
recovery
is
not
considereda
MATTE.
HarmDurationCategoryͲ>
1
2
3
4
LAND
ч3
years
>3
yearsor>2
growing
seasons
for
agricultural
land
>20
years
>50
years
SURFACEWATER
ч
1
year
>1
year
>10
years
>20
years
GROUNDWATERBODY
HarmaffectingnonͲ
SPZ.
Harmaffecting
SPZ.
Figure 5 – Summary of MATTE Tolerability Tables (Refer to Appendix 4)
Guideline – Environmental Risk Tolerability for COMAH Establishments v1.0
Page 31 of 88