DEEP PANUKE OFFSHORE GAS DEVELOPMENT PROJECT ENCANA

9,12

MB

CORPORATION

255

stron

6414

ID

Fisheries and Oceans Canada (DFO)

2007

rok

Table of Contents

FOREWORD i

Executive Summary ii

Table of Contents v

Appendices. viii

List of Figures viii

List of Tables viii

List of Abbreviations. x

1.0 General Information 1

1.1 Background. 2

1.2 Need for and Purpose of the Project 4

2.0 Project Description. 5

2.1 Project Overview 5

2.2 Project Equipment 9

2.2.1 Mobile Offshore Production Unit (MOPU) 9

2.2.2 Subsea Wells and Flowlines. 9

2.2.3 Export Pipeline. 9

2.3 Construction and Installation 17

2.3.1 MOPU Facilities 17

2.3.2 Export Pipeline. 18

2.3.3 Subsea Tie-In Facilities . 18

2.3.4 Subsea Flowlines and Umbilicals 19

2.3.5 Construction Methods Involving Sediment Displacement. 19

2.3.6 Subsea Equipment and Associated Protection Structures 20

2.3.7 Onshore Facilities and Pipeline (M&NP Option Only) 24

2.3.8 Development Well Construction. 24

2.3.9 Hydrostatic Testing . 28

2.4 Operations. 30

2.4.1 Production 30

2.4.2 Utilities 37

2.4.3 Support and Servicing. 39

2.4.4 Project Safety Zones . 39

2.4.5 Onshore Facilities 42

2.5 Decommissioning and Abandonment 42

2.6 Project Schedule 44

2.7 Emissions and Discharges 44

2.7.1 Air Emissions. 48

2.7.2 Noise Emissions 50

2.7.3 Electromagnetic Emissions 50

2.7.4 Drill Waste Discharges 50

2.7.5 Effluent Discharges . 52

2.7.6 Naturally Occurring Radioactive Material (NORM) 54

2.7.7 Non-Hazardous Solid Wastes . 54

2.7.8 Hazardous Materials and Waste . 54

2.8 Environmental and Safety Protection Systems . 54

2.8.1 Equipment Inspection and Maintenance . 54

2.8.2 Pipeline Leak Prevention 55

2.8.3 Blowout Prevention Safeguards. 55

2.8.4 Flowline Protection 56

2.8.5 Subsea Protection Structures 56

2.8.6 Project Safety Zones . 56

3.0 Project Alternatives 57

3.1 Alternatives to the Project . 57

3.2 Alternative Means of Carrying Out the Project 57

3.2.1 Substructure Type . 59

3.2.2 Topsides Type 62

3.2.3 Total Number of Platforms 62

3.2.4 Re-use of Existing Platform 62

3.2.5 Processing Location 62

3.2.6 Acid Gas Handling. 65

3.2.7 Produced Water Disposal . 67

3.2.8 Condensate Handling 70

3.2.9 Production Capacity Alternatives 72

3.2.10 Export Pipeline Alternatives . 72

3.2.11 Subsea Tie-back Alternatives . 79

3.2.12 Acid Gas Injection Location 80

4.0 Malfuncions and Accidental Events 82

4.1 Potential Malfunctions and Accidental Events 82

4.1.1 Platform-based Spills 83

4.1.2 Collisions 83

4.1.3 Malfunction of Acid Gas Management System. 83

4.1.4 Blowout Releases 83

4.1.5 Pipeline and Flowline Releases 84

4.1.6 UXO or Other Warfare Agents 84

4.2 Marine Spill Risk and Probability 84

4.2.1 Platform-based Spills 84

4.2.2 Blowouts. 85

4.2.3 Spills from Pipelines and Flowline Operations . 88

4.3 Onshore Pipeline Risk . 88

4.3.1 Accident Scenarios 88

4.3.2 Hazards. 88

4.3.3 Risks . 89

4.4 Marine Spill Release Behaviour 89

4.4.1 Platform-based Spills 89

4.4.2 Blowouts and Pipeline/Flowline Ruptures. 90

5.0 Environmental Management 94

5.1 Environmental Management Framework 94

5.1.1 Corporate Responsibility Policy. 96

5.1.2 EHS Best Practice Management System. 96

5.2 Deep Panuke Emergency Management Plan . 96

5.3 Deep Panuke Spill Response Plan 96

5.4 Deep Panuke Environmental Effects Monitoring Plan 97

5.5 Environmental Protection Plan . 97

5.5.1 Chemical Management 98

6.0 Public and Aboriginal Participation 99

6.1 Responsible Authorities Consultation on the Environmental Assessment 99

6.1.1 Scoping Document 99

6.1.2 Environmental Assessment 100

6.1.3 Review of Completed CSR 101

6.1.4 Responsible Authorities’ Aboriginal Engagement 101

6.2 EnCana’s Consultation Program. 101

7.0 Scope of the CSR 106

8.0 Biophysical and Socio-economic Setting. 108

8.1 Biophysical Setting 108

8.1.1 Marine Physical Environment . 108

8.1.2 Marine Biological Environment 109

8.1.3 Onshore Environment . 120

8.1.4 Summary of Special Status Species (including Species at Risk and Species of Conservation

Concern). 126

8.2 Socio-economic Setting. 131

8.2.1 Land Use. 131

8.2.2 Economy. 133

8.2.3 Fisheries and Aquaculture 135

8.2.4 Other Ocean Users 137

9.0 Environmental Effects of the Project 140

9.1 Significance Criteria. 140

9.2 Accidental Releases. 141

9.3 Increased Produced Water Discharge 144

9.4 Air Emissions 146

9.5 Presence of New Subsea Infrastructures. 155

9.6 Construction Work for Subsea Infrastructure 156

9.7 Drill Waste Discharges. 159

9.8 Near Shore and Onshore Contaminants 161

9.9 Wildlife and Habitat 163

9.10 Impediments to Navigation and Other Ocean Users . 169

9.11 Species at Risk . 171

9.12 Cumulative Effects . 182

9.13 Effects of the Environment on the Project . 186

9.14 Capacity of Renewable Resources . 188

10.0 Socioeconomic Effects of the Project. 189

10.1 Effects on Aboriginal Communities or Resources 190

11.0 Determination Of Effects Significance 191

11.1 Required Mitigation and Follow-up. 192

11.1.1 Mitigation 192

11.1.2 Follow-up and Monitoring. 197

Literature Cited 199

Appendices

A Scope of Comprehensive Study

B Relevant Commitments Made in the 2002 CSR

C Summary of Public Comments Addressed by the NEB Member (adapted from Sections 7-9 of

the JER)

D Summary of Public Comments Addressed by the Commissioner (adapted from Sections 12-14 of

the JER)