A90966-10 Trans Mountain Attachment 9 Groundwater
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GROUNDWATER MANAGEMENT PLAN FOR THE TRANS MOUNTAIN PIPELINE ULC TRANS MOUNTAIN EXPANSION PROJECT NEB CONDITION 72 March 2018 REV 3 01-13283-GG-000-CHE-RPT-0001 R3 Prepared for: Trans Mountain Pipeline ULC Kinder Morgan Canada Inc. Suite 2700, 300 – 5th Avenue S.W. Calgary, Alberta T2P 5J2 Ph: 403-514-6400 Trans Mountain Pipeline ULC Groundwater Management Plan Trans Mountain Expansion Project 687945/March 2018 TABLE OF CONTENTS Page 1.0 INTRODUCTION .............................................................................................................................. 1 1.1 Links to other Trans Mountain Environmental Plans .......................................................... 1 1.2 Regulatory Guidance .......................................................................................................... 2 1.3 Definitions ........................................................................................................................... 2 2.0 CONSULTATION AND ENGAGEMENT .......................................................................................... 3 3.0 PRE-CONSTRUCTION PHASE ...................................................................................................... 4 3.1 Aquifers ............................................................................................................................... 4 3.2 Preliminary Assessment of Potential Groundwater Concerns ............................................ 4 3.3 Water Wells and Springs .................................................................................................... 6 3.3.1 Water Well Monitoring and Testing ........................................................................ 6 3.4 Springs ................................................................................................................................ 8 4.0 CONSTRUCTION MITIGATION STRATEGIES .............................................................................. 9 4.1 Vulnerable Aquifers ........................................................................................................... 12 4.1.1 Concerns .............................................................................................................. 13 5.0 SUMMARY ..................................................................................................................................... 14 6.0 REFERENCES ............................................................................................................................... 15 6.1 Literature Cited .................................................................................................................. 15 6.2 GIS Data and Mapping References .................................................................................. 15 LIST OF APPENDICES Appendix A Legislation ........................................................................................................................A-1 Appendix B Aquifers ............................................................................................................................B-1 Appendix C Potential Groundwater Related Issues ........................................................................... C-1 Appendix D Consultation and Engagement ........................................................................................ D-1 Appendix E Record of Stakeholder Notifications of Plan ....................................................................E-1 Appendix F Aboriginal Groups to be Engaged on the Groundwater Management Plan .................... F-1 LIST OF TABLES Table 3.2-1 Potential Groundwater-Related Issues ............................................................................... 5 Table 3.2-2 Potential Groundwater Issues Related to Specific Construction Activities ......................... 6 Table 4.0-1 Proposed Mitigation of Groundwater-Related Issues ......................................................... 9 Table B-1 Classification Component ................................................................................................B-2 Table B-2 Ranking Component ........................................................................................................B-3 Table D-1 Summary of Appropriate Government Authority Consultation Activities Related to the Groundwater Management Plan (July 2015 to February 2017) ............................... D-4 Table D-2 Summary of Aboriginal Concerns Regarding the Groundwater Management Plan ..... D-13 Table E-1 Record of Notification .......................................................................................................E-2 01-13283-GG-000-CHE-RPT-0001 Page i Trans Mountain Pipeline ULC Groundwater Management Plan Trans Mountain Expansion Project 687945/March 2018 1.0 INTRODUCTION The Groundwater Management Plan (GMP or the Plan) was prepared to address the requirements of NEB Condition 72. The Plan was submitted to Appropriate Government Authorities, potentially affected Aboriginal groups, species experts and public stakeholders on September 16, 2016 for a review and feedback period which concluded on December 16, 2016. Trans Mountain incorporated any feedback into the final Plan or has provided rationale for why input has not been included, as summarized in Appendix D. Since the September 14, 2016 release of the draft Plan, engineering design has continued to progress and there have been changes that are described in detail in Trans Mountain Expansion Project (the Project or TMEP) Fall 2016 Project Updates (www.transmountain.com/environmental-protection-plans). All of the changes have been reviewed, and the relevant Project design updates have been incorporated into this Plan. This GMP has been prepared as part of the Environmental Protection Plan (EPP) required for the Trans Mountain Pipeline ULC (Trans Mountain) Project. This Plan has been developed to outline the environmental procedures for identifying potential groundwater related effects of the Project, the criteria for implementing those procedures, planned mitigation measures, and monitoring of groundwater quantity and/or quality; with particular emphasis on protecting identified vulnerable aquifers encountered by the pipeline corridor. This GMP is primarily focused on mitigation strategies for the construction phase of the Project, but also outlines key aspects considered and data collected during the pre-construction phase of the project, as follows: • pre-construction: preliminary feasibility level identification of areas of potential risk along the pipeline corridor and the collection of desktop and field baseline data; and • construction: develop mitigation strategies, define the criteria to be used during construction to implement mitigation strategies to protect groundwater resources. This GMP has been prepared based on the detailed assessment of available information on groundwater conditions along the pipeline corridor described in the Groundwater Technical Report for the Project (Waterline 2013) (Groundwater Technical Report) that was submitted as part of the Facilities Application (Application), and updated with new publicly available data and project specific data collected since 2013. Trans Mountain has prepared a Contamination Identification and Assessment Plan to address the requirements of NEB Condition 46. The Contamination Identification and Assessment Plan provides the locations of known or suspected pre-existing contamination within the Project footprint and potential mitigation measures for preventing mobilization of pre-existing contamination during construction. The Contamination Identification and Assessment Plan should be referred to for all issues with respect to pre-existing contamination. 1.1 Links to other Trans Mountain Environmental Plans The Groundwater Management Plan is not meant to replace or contradict mitigation measures presented elsewhere in the Environmental Plans, but rather to be used in association with the following plans: • Project EPPs (Volumes 1-5, 9, and 10 of the Environmental Plans respectively); − Temporary Construction Lands and Infrastructure EPP; − Pipeline EPP (Volume 2 of the Environmental Plans); − Facilities EPP; − Reactivation EPP; − Facilities EPP; 01-13283-GG-000-CHE-RPT-0001 Page 1 Trans Mountain Pipeline ULC Groundwater Management Plan Trans Mountain Expansion Project 687945/March 2018 • Water Crossing Construction Monitoring Management Plan (Volume 6 of the Environmental Plans); • Wetland Survey and Mitigation Plan (Volume 6 of the Environmental Plans) (NEB Condition 41); • Watercourse Crossing Inventory (NEB Condition 43); • Environmental Alignment Sheets (Volume 8 of the Environmental Plans); • Contamination Identification and Assessment Plan (NEB Condition 46); and • Access Management Plan (Volume 6 of the Environmental Plans) (NEB Condition 47). 1.2 Regulatory Guidance A listing of applicable federal and provincial acts, regulations and guidelines is provided in the Groundwater Technical Report (Waterline 2013), an updated version has been included in Appendix A of this report. Since 2013 there have been considerable changes to the legislation governing groundwater in BC. BC’s new Water Sustainability Act received Royal Assent on May 29, 2014, and came into force on February 29, 2016. 1.3 Definitions Groundwater Quality: Groundwater quality depends on the source of the water and the material through which it flows (e.g., clay tills containing sulphate versus clean sand and gravel), as well as whether the groundwater