Adam Oswell Enbridge Sr Regulatory Advisor tel 587-233-6368 200, 425 – 1st Street SW Law, Regulatory Affairs fax 403-767-3863 Calgary, Alberta T2P 3L8 [email protected] Canada April 1, 2021 E-FILE Canada Energy Regulator Suite 210, 517 – 10th Avenue SW Calgary, AB T2E 0A8 Attention: Jean-Denis Charlebois, Secretary of the Commission Dear Mr. Charlebois, Re: Enbridge Pipelines Inc. (“Enbridge”) Line 3 Replacement Program (“Project”) Condition 35 – Emergency Response Exercise National Energy Board (“NEB”) Certificate OC-063 Condition 35 requires Enbridge to conduct both tabletop and equipment mobilization exercises in Alberta, Saskatchewan, and Manitoba. Condition 35 b) states the following: b) Provide the Board in writing, at least 45 days prior to the date of each emergency response exercise referred to in a), the following: i) location of the exercise; ii) exercise coordinator; iii) date of the exercise; iv) duration of the exercise; v) confirmation that a representative from each province (that is, Alberta, Saskatchewan and Manitoba) has been invited to participate in or observe the exercise; vi) the name and organization of each individual, including representatives from Aboriginal groups, invited to participate in the exercise; vii) type of exercise (that is, tabletop, or equipment deployment); and viii) goals (for example, focus of exercise, scope, scale, extent of play, format, evaluation method), and how success is measured. A full scale exercise will be held on May 19, 2021. The Incident Command Post will be organized virtually over Microsoft Teams. The equipment and field deployment will take place on the Souris River, in Wawanesa, MB. The exercise coordinator will be , Emergency Response Specialist, Prairie Region. The exercise is scheduled to run approximately 9 hours, from 0800 to 1700. Indigenous groups, government departments, agencies and other groups invited to participate include: April 1, 2021 Page 2 List of Invitees Blood Tribe Montana First Nation Natural Resources Canada Battleford Agency Tribal Chiefs Moosomin First Nation Canada Energy Regulator Battleford Tribal Council Muscowpetung First Nation Government of Manitoba Birdtail Sioux Dakota First Nation Muskowekwan First Nation Manitoba Hydro Canupawakpa Dakota Nation Nekaneet First Nation Prairie Mountain Health Carry the Kettle First Nation Ocean Man First Nation City of Brandon Cowessess First Nation Ochapowace First Nation City of Winnipeg Enoch Cree Nation Pasqua First Nation Portage la Prairie Ermineskin Cree Nation Peguis First Nation Carberry Fire Department Pheasant Rump Nakota First File Hills Qu'Appelle Tribal Council Shilo Fire Department Nation Flying Dust First Nation Piapot First Nation Souris Fire Deparment Glenboro/South Cypress Fire Frog Lake First Nation Poundmaker Cree Nation Department George Gordon First Nation Red Pheasant First Nation Ninette, Prairie Lakes RM Kahkewistahaw First Nation Roseau River First Nation Dunrea, Prairie Lakes RM Keeseekoose First Nation Samson Cree First Nation Lake Manitoba First Nation Samson Cree Nation Louis Bull Tribe Saskatoon Tribal Council Manitoba Métis Federation Sioux Valley Dakota Nation Métis Nation – Saskatchewan Star Blanket Cree Nation Metis Nation of Alberta Swan Lake First Nation Metis Nation of Alberta Region 2 Sweetgrass First Nation Metis Nation of Alberta Region 3 White Bear First Nation Metis Nation of Alberta Region 4 Yorkton Tribal Council Zagime Anishinabek (formerly Metis Nation of Alberta Region 4 Sakimay) Mistawasis Nehiyawak This Full Scale exercise will focus on the Enbridge Incident Management Team functionality, employing the Incident Command System and including communication processes, operational response management, public affairs, and command and control of field response resources for a notional incident at the Souris River. The purpose of the exercise is to test and practice oil spill emergency response processes and procedures for Line 93. It is intended to be a facilitated, exercise of a response to an oil release and will exercise the Incident Command System (“ICS”) structure and documentation, as well as identify areas of improvement. At the conclusion of the exercise a hot wash will be facilitated to allow discussions of decision-making processes, player actions and identify strengths and areas of improvement. An After-Action Meeting will be conducted the following day, May 20, 2021. Please note that personal information has been redacted in the electronic filing to protect the privacy of those individuals. An un-redacted version will be provided to the Canada Energy Regulator. April 1, 2021 Page 3 If you have any questions concerning this matter, please do not hesistate to contact me at (587) 233-6368 or by email at [email protected]. Yours truly, Adam Oswell Sr Regulatory Advisor .