489 / 648
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.
Contents
FOREWORD ....................................................................................................................................... 2
CONTENTS ......................................................................................................................................... 3
1.
EXECUTIVE SUMMARY ......................................................................................................... 5
2.
SCOPE .................................................................................................................................... 6
2.1
Competency requirements....................................................................................................... 6
2.2
Proportionality in Risk Assessment.......................................................................................... 6
2.3
Using this guidance.................................................................................................................. 7
3.
DEFINITION OF THE TYPES OF ENVIRONMENTAL HARM .............................................. 10
3.1
Environmental Receptors....................................................................................................... 10
3.2
MATTE Thresholds ................................................................................................................ 11
3.2.1 Designated area..................................................................................................................... 11
3.2.2 Widespread habitat (land/Water) ........................................................................................... 12
3.2.3 Groundwater .......................................................................................................................... 13
3.2.4 Soil or Sediment (Land/Water)............................................................................................... 15
3.2.5 Built environment (Land, man-made)..................................................................................... 16
3.2.6 Various receptors, as defined (Water) ................................................................................... 17
3.2.7 Particular species (Land, Water, Air) ..................................................................................... 17
3.2.8 Marine (Water) ....................................................................................................................... 17
3.2.9 Freshwater and estuarine habitats (Water)............................................................................ 18
4.
RISK CRITERIA AND EVALUATING RISKS......................................................................... 20
4.1
Assessing the risk of potential harm ...................................................................................... 20
4.1.1 Terms used in risk assessment ............................................................................................. 22
4.2
MATTE potential matrix ......................................................................................................... 23
4.2.1 Grouping and compartmentalisation ...................................................................................... 23
4.2.2 Tables to assess MATTE potential ........................................................................................ 24
4.3
Aggregating risk and risk frequencies.................................................................................... 25
4.3.1 Aggregating risk option 1 - Summation of risks ..................................................................... 25
4.3.2 Aggregating risk option 2 – Developing scenario based risk criteria ..................................... 25
4.3.3 Impacts from adjacent sites ................................................................................................... 26
4.3.4 Determining risk frequencies ................................................................................................. 27
4.3.5 Determining risk reduction of prevention and mitigation layers ............................................. 28
5.
COST BENEFIT ANALYSIS .................................................................................................. 29
5.1
Disproportion Factor (DF) ...................................................................................................... 29
Guideline – Environmental Risk Tolerability for COMAH Establishments v1.0
Page 3 of 88