APPENDIX 1.0-1 Navigation Study
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APPENDIX 1.0-1 Navigation Study WESPAC TILBURY LNG CARGO LOADING AND MARINE TRANSIT RISK ASSESSMENT Termpol Element 3.13 Risk Assessment WesPac Midstream LLC Report No.: 10096498, Rev. 2 Document No.: 10096498-1 Date: 2018-08-23 Project name: Wespac Tilbury LNG Cargo Loading and Marine DNV GL (U.S.A.), Inc. Transit Risk Assessment Oil & Gas Services Report title: Termpol Element 3.13 Risk Assessment 1400 Ravello Drive Customer: WesPac Midstream LLC Katy, TX 77449 Date of issue: 2018-08-23 United States Project No.: 10096498-1 Tel: +1 281 396 1000 Organisation unit: Oil & Gas Services Report No.: 10096498, Rev. 2 Document No.: 1FNC5OH-4 Objective: This risk assessment is prepare to satisfy the requirements of TERMPOL Section 3.13, General Risk Analysis and Intended Methods of Reducing Risks for the propsed WesPac Midstream, LLC. LNG facility on Tilbury Island, Delta, British Columbia, Canada. Prepared by: Verified by: Approved by: Tatiana Norman Cheryl Stahl Felipe Sodre Prinicipal Consultant Senior Principal Consultant Head of Section Performance Risk Managment ☐ Unrestricted distribution (internal and external) Keywords:LNG, TERMPOL, Navigation Risk, Terminal ☐ Unrestricted distribution within DNV GL Risk, Loading QRA ☐ Limited distribution within DNV GL after 3 years ☒ No distribution (confidential) ☐ Secret Reference to part of this report which may lead to misinterpretation is not permissible. Rev. No. Date Reason for Issue Prepared by Verified by Approved by 0 2018-07-17 First issue DFOL CSTAHL FSOD 1 2018-08-10 Revised to include Phase II Operations TNORM CSTAHL FSOD 2 2018-08-23 Revised Executive Summary TNORM CSTAHL FSOD DNV GL – Report No. 10096498, Rev. 2 – www.dnvgl.com Page i TABLE OF CONTENTS Executive Summary ................................................................................................................ 1 Introduction .......................................................................................................................... 3 2.1 Objectives ..................................................................................................................... 4 2.2 Scope . ......................................................................................................................... 4 2.3 Report Structure ............................................................................................................. 6 Methodology .......................................................................................................................... 7 Background Information .......................................................................................................... 8 4.1 Marine Transit QRA ......................................................................................................... 8 4.2 Project Vessel Specifications .......................................................................................... 22 4.3 LNG Cargo Loading ....................................................................................................... 26 Risk Controls Incorporated in the Analysis ............................................................................... 33 5.1 Risk Controls for Transit ................................................................................................ 33 5.2 Risk Controls for Cargo Loading ...................................................................................... 33 Frequency Assessment .......................................................................................................... 35 6.1 Transit Frequency Assessment ....................................................................................... 35 6.2 Berth Frequency Assessment.......................................................................................... 40 Consequence Assessment ...................................................................................................... 42 7.1 Transit Consequence Results .......................................................................................... 42 7.2 Berth Consequence Results ............................................................................................ 43 Risk Results ......................................................................................................................... 46 8.1 Risk Criteria ................................................................................................................. 46 8.2 Location-Specific Individual Risk ..................................................................................... 47 8.3 Marine Transit Risk Results ............................................................................................ 47 8.4 Cargo Loading Risk ....................................................................................................... 49 Conclusions ......................................................................................................................... 53 Recommendations ................................................................................................................ 54 References .......................................................................................................................... 55 Appendix A Hazard Identification Workshop Report Appendix B Description of MARCS Model Appendix C Methodology Appendix D Frequency and Consequence Study Basis Appendix E Frequency Results Appendix F Loss of Containment Methodology Appendix G Consequence Results Appendix H Risk Results DNV GL – Report No. 10096498, Rev. 2 – www.dnvgl.com Page ii Figures Figure 2-1: Proposed Location of WesPac Tilbury Terminal ..................................................................... 3 Figure 3-1: Risk Assessment Methodology ........................................................................................... 7 Figure 4-1: Segment 1 – Juan de Fuca Strait (CHS Chart 3606, Ref. /9/) ................................................. 9 Figure 4-2: Segment 2 – Haro Strait (CHS Chart 3462, Ref. /10/) ........................................................ 10 Figure 4-3: Segment 3 – Georgia Strait (CHS Chart 3463, Ref. /11/) .................................................... 11 Figure 4-4: Segment 4 – Fraser River (CHS Chart 3490, Ref. /12/) ....................................................... 11 Figure 4-5: Turn Point Special Operating Area (CHS Chart 3462, Ref. /10/) ........................................... 13 Figure 4-6 Clear Transit Areas (Ref /13/) .......................................................................................... 14 Figure 4-7: Study Area and Segments Defined in MARCS ..................................................................... 17 Figure 4-8: Juan de Fuca Strait – Georgia Strait Cross Sections ............................................................ 18 Figure 4-9: Fraser River Cross Sections ............................................................................................. 18 Figure 4-10: Number of Transits and Normalized Distribution of Vessel Types per Cross Section ............... 19 Figure 4-11: Traffic Density in the Study Area .................................................................................... 20 Figure 4-12: Membrane System Insulation ......................................................................................... 23 Figure 4-13: Structural View of an LNG Export Carrier with Membrane-type Tanks .................................. 24 Figure 4-14: Profile View of Typical LNG Bunker Vessel with C-type Tanks ............................................. 24 Figure 4-15: Cross Sectional View of C-type Tanks .............................................................................. 25 Figure 4-16: Locations of Existing and Proposed Facilities (Ref. /21/) .................................................... 27 Figure 4-17: Berthing Dolphins During Loading ................................................................................... 28 Figure 4-18: Central Monitoring Screen during LNG Export Carrier Berthing ........................................... 30 Figure 4-19: Vessel Approach Display Board ...................................................................................... 30 Figure 4-20: Central Monitoring Screen with LNG Export Carrier at Berth ............................................... 31 Figure 6-1: Estimated Incident Frequency for Laden Project Vessels ...................................................... 37 Figure 6-2: Loss of Containment Frequency during Transit ................................................................... 39 Figure 6-3: Frequency of LOC from a Passing Vessel Strike (per year) ................................................... 41 Figure 8-1 Summary of BCOGC Risk Criteria ..................................................................................... 46 Figure 8-2: Transit LSIR in Segments 1 to 3 ....................................................................................... 47 Figure 8-3: Transit LSIR in Segment 4, Fraser River ............................................................................ 48 Figure 8-4: LSIR Contours for Cargo Loading...................................................................................... 49 Figure 8-5: LSIR at the Property Boundary ........................................................................................ 50 Figure 8-6: Locations of Risk Ranking Points ...................................................................................... 51 Figure