Trans Mountain Expansion Project ORDER OPL-004-2020 1054408 BC Inc. Commitment ID Team Responsible for Commitment Commitment

Trans Mountain Expansion Project ORDER OPL-004-2020 1054408 BC Inc.

Team Project Stage for Superseded by Commitment Commitment Commitment Responsible for Commitment Description Source(s) of Commitment Implementation Condition (x) ID Made To Status Commitment of Commitment Number 4,497 Lands and ROW Landowner - Trans Mountain commits to: Detailed Route Hearing Written Evidence; During Addressed by 1054408 BC Ltd. 1) engaging and working with Landowner Mark Steele, 1054408 BC Ltd., regarding options for Transcript Volume 4 (para 2300); Transcript Construction Construction Line re-configuring temporary workspace, where practicable Volume 4 (para 2715), Transcript Volume 4 List 2) working with the landowner regarding permanent road crossings, road layout and (para 3254); Decision; Filing ID A93284 reconfiguration of the workspace to minimize the impacts on the development, to the extent possible 3) engaging and working with the Landowner regarding establishing access plans and scheduling construction activities to minimize the Project's impacts on the residential development and on the Landowner's access road and access to its lands, to the extent practicable 4) restricting access on the construction footprint only during the construction period 5) developing a Traffic Management Plan, including signage, to enable safe access onto, and egress from the site 6) installing the pipeline at a depth that will allow the additional fill above it 7) cooperating with the Landowner in providing proximity and crossing permits, if required, to accommodate future development of its lands during operations.

4507 Operations Landowner - Trans Mountain commits to submitting a separate regulatory application for its proposed Submission in Relation to the Review Process Prior to Complete 1054408 BC Ltd. replacement for the existing Trans Mountain Pipeline ("TMPL") at the Coquihalla River, for 1054408 BC Ltd, para 11 (C04263) Construction including any requirements for the on-land pipe installation of the TMPL replacement.

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ENVIRONMENTAL PLANS VOLUME 8

ENVIRONMENTAL ALIGNMENT SHEET PACKAGE FOR THE TRANS MOUNTAIN PIPELINE ULC TRANS MOUNTAIN EXPANSION PROJECT NEB CONDITION 72

June 2020 REV 6 01-13283-SG-0000-CHE-DWG-0001 R6 ORDER OPL-004-2020

Prepared for:

Trans Mountain Pipeline ULC Trans Mountain Canada Inc. Suite 2700, 300 – 5th Avenue S.W. Calgary, Alberta T2P 5J2 Ph: 403-514-6400

ENVIRONMENTAL ALIGNMENT SHEET GUIDE

GENERAL INFORMATION

The Environmental Alignment Sheets (EAS) provide information pertaining to the environmental and socio-economic setting above the Photomosaic. Potential environmental and socio-economic issues identified during Project planning, and their corresponding mitigation measures, are positioned below their respective location on the Photomosaic. Resource-specific Environmental Notes are included below the Photomosaic, outlining mitigation measures to be implemented during Project construction. These measures are further described in the Environmental Plans, specifically the Pipeline Environmental Protection Plan (Pipeline EPP) (Volume 2 of the Environmental Plans), the Environmental Management Plans (Volume 6 of the Environmental Plans) and the Resource Specific Mitigation Tables (Volume 7 of the Environmental Plans). The mitigation measures included on these Index Sheets do not include all of the potential mitigation measures that may be implemented; please consult the Environmental Plans for additional protection measures as necessary. Contingency plans providing guidance for events where previously unidentified environmental features are encountered can be found in Appendix B of the Pipeline EPP. Drawings can be found in Appendix C of the Pipeline EPP.

Environmental and Socio-economic Setting Information Environmental Protection Applicable EAS Note Applicable Resource Specific Mitigation Table EAS Band1 (Above Photomosaic) (Below Photomosaic) (Index Sheet Number) (Volume 7 of the Environmental Plans) Jurisdiction Regional, municipal or provincial jurisdictional authority N/A N/A N/A Land Ownership Indicates whether land is Private or Crown Land as encountered by the trench N/A N/A N/A line. Line List (Parcel IDs) Reference to land parcel identification numbers as encountered by the trench N/A N/A N/A line Above Photomosaic: Hydrology Watercourse and drainage crossings, watercourse crossing class, fish Pipeline and equipment/vehicle crossing methods for watercourses, See AQ-Notes 1 to 6 (Index Sheet 4) Section 7.0 (Watercourses/Hydrology) provides location and names of watercourses crossed by the pipeline route. (Wetlands and Watercourses) presence, species at risk presence, navigability status drainages and channels. Recommendations are specified for non-frozen This section also includes information on watercourse class, sensitivity rating, water quality monitoring requirement, conditions and assume the presence of water. Additional recommendations fish presence, recommended construction work window, pipeline and vehicle crossing methods, riparian area and Below Photomosaic: Crossing for dry or frozen conditions are located in the watercourse crossing summary other pertinent information to watercourses. Recommendations table Watercourse (Pipeline: Vehicle) and Classification of wetlands encountered by the construction footprint including Measures to be implemented for wetlands See WT-Notes 1 to 5 (Index Sheet 6) Section 6.0 (Wetlands) provides locations and site-specific mitigation for wetland features. This section also Wetland label to indicate if wetland is located within a Drag Section. Measures to address navigable and potentially navigable waterbodies includes information on wetland class, length and area of wetland in the Project Footprint and other pertinent information. Riparian Habitat Coloured band indicating the riparian habitat and site-specific riparian buffer Locations of general riparian reclamation measures See RC-Note 1 (Index Sheet 5) Section 10.0 (Coarse Woody Debris Volumes) provides locations and volumes for the placement of CWD following area for watercourses (dark blue) and wetlands (light blue) Locations where coarse woody debris (CWD) will be placed during See RC-Note 2 (Index Sheet 5) construction. reclamation activities of the pipeline Terrestrial Features Wildlife features including: important wildlife habitat; habitat locations of Measures to address wildlife habitat, critical habitat ranges, site-specific See WF-Notes 1 to 8 (Index Sheets 5 Section 4.0 (Wildlife and Wildlife Habitat) provides locations and site-specific mitigation measures for wildlife interest; critical habitat ranges; site-specific features; and wildlife habitat on features and wildlife habitat on federal lands and 6) features and habitat areas, as well as information on timing restrictions (where applicable), recommended setback federal lands. distances as well as identified species at risk. Vegetation features including: rare vascular plants; mosses, liverworts, and Measures to mitigate impacts to rare plants, plant communities/ecosystems, See VG-Notes 1 to 5 (Index Sheet 5) Section 5.0 (Vegetation) provides locations and site-specific mitigation measures for rare plant and rare ecological lichens; rare ecological communities; critical habitat ranges. lichens, liverworts, critical habitat areas OGMAs, and cryptogamic crust communities, critical habitat ranges, locations and details of OGMAs and areas of cryptogamic crust. Old Growth Management Areas (OGMAs) are identified in British Columbia. salvage locations. Cryptogamic Crust Salvage location are identified in British Columbia. Areas of high weed density Areas where soil containment should occur due to high weed density See VG-Note 4 (Index Sheet 5) Section 5.3 (High Weed Density Areas) provides locations and site-specific mitigation measures for areas of high weed density. Socio-economic Considerations Select agricultural operations, soil borne pathogens, and socio-economic Measures to address agricultural impacts and soil borne pathogens See AG-Note 1 to 9 (Index Sheet 4) Section 1.0 (Socio-Economics and Agriculture) provides approximate locations and details for socio-economic features features, agricultural features, and biosecurity concerns. Buffered ranges of known archaeological or palaeontological concerns and Measures being considered through ongoing consultation with applicable See AK-Note 1 and 2 (Index Sheet 4) Section 2.0 (Heritage Resources and Paleontology) provides approximate locations (buffered) for heritage features. areas with known traditional land use (TLU) and traditional land resource use regulators and communities See TLU-Note 1 (Index Sheet 5) Section 3.0 (Traditional Land and Resource Use) provides approximate locations (buffered) and mitigation (TLRU) values measures for traditional land and resource use features that are being considered in ongoing discussions with applicable regulators and communities. Above Photomosaic: Other Environmental Areas with groundwater concerns Measures to be implemented in areas with groundwater concerns See HY-Note 1 (Index Sheet 5) Section 7.0 (Watercourses/Hydrology) provides locations and mitigation measures for areas where groundwater Considerations features have been identified. Areas of moderate and high-risk potential to encounter contamination and Measures to be implemented in areas with moderate and high-risk potential See SO-Note 8 (Index Sheet 3) Section 8.3 (Contamination) provides locations and mitigation measures for areas of moderate and high-risk Below Photomosaic: Other Environmental areas of confirmed contamination through intrusive sampling for contamination and areas of confirmed contamination potential to encounter contamination and areas of confirmed contamination Protection Measures Site-specific watercourse drawings Drawing reference for the site-specific watercourse crossing detail N/A Section 7.0 (Watercourses/Hydrology) provides locations, mitigation measures, and reference to drawings.

Areas of shallow bedrock, mineral leaching and acid rock drainage potential Measures to be implemented in areas with potential for acid generating rock See GEO-Note 1 and 2 (Index Section 8.0 (Soils/Geology) provides locations and details on soil types encountered and their characteristics. This and shallow bedrock. Sheet 4 and 5) section also includes locations with potential for acid-generating rock. Areas where the pipeline crosses a facility Name of facility encountered and reference to Facility EPP N/A N/A

Areas encountering Parks and Protected Areas Reference to applicable Parks and Protected Areas Reclamation Plan N/A Section 1.1 (Parks and Protected Areas) provides locations and reference to applicable Reclamation Plans

Areas requiring CWD retention for wildlife habitat restoration Locations where CWD will be placed during reclamation of the pipeline See WF-Note 9 (Index Sheet 6) Section 10.0 (Coarse Woody Debris Volumes) provides locations and volumes for the placement of CWD following construction. The Candidate Access Management location and identification number Measures to be implemented for areas of Candidate Access Management. See RC-Note 4 (Index Sheet 5) Section 1.4 (Candidate Access Management) provides locations and details for areas of candidate access management. Soil Parent Material2 Soil parent material from which current soils have formed N/A – Soil units, along with expected topsoil thickness and slope class are N/A See Sections 8.0 (Soils/Geology). indicated on the photomosaic Land Use Predominant land use at the time of survey N/A N/A N/A Proximity to TMPL N/A - TMPL existing pipeline is displayed on the photomosaic Distance between the existing TMPL existing pipeline and the proposed Trans N/A N/A Mountain Expansion Project (TMEP) trench line Recommended Construction Work N/A Allowable work window or least risk biological window for site-specific N/A Sections 4.0 (Wildlife and Wildlife Habitat) and 7.1 (Watercourses) provides information pertaining to Window watercourses and wildlife features displayed in the Wildlife and Wildlife recommended construction timing windows for wildlife and aquatic construction work windows, respectively. Habitat and Hydrology bands Soil Handling – Stripping Depth (cm)2 N/A – Topsoil depths are displayed on the photomosaic Recommended topsoil stripping depths to be used as a guide during soil N/A See Section 8.1 (Soils). handling and stripping procedures INDEX SHEET 2 of 12

INDEX SHEET 3 of 12

GENERAL ENVIRONMENTAL MITIGATION MEASURES

TOPSOIL STRIPPING ALTERNATIVE SOILS HANDLING

Where soils are not readily distinguishable by colour or texture, salvage a minimum of 10 cm from all lands, except for areas of disturbed Three-Lift Soils Handling: Salvage topsoil to the width specified in the salvage procedures band. At three-lift soil handling areas, land, areas with rocky outcrops (unless otherwise specified) and treed areas to a minimum of 15 cm. Salvage topsoil from the pipeline square brackets indicate upper subsoil salvage depths. For example, “20 [30]” indicates 20 cm of topsoil followed by 30 cm of upper, construction footprint (i.e., trench, spoil storage and work areas) on level terrain, and from all areas to be graded on all land uses or as good-quality subsoil to be salvaged. Ensure that the lower lift of poorer-quality spoil is backfilled before the upper lift of good-quality shown on the EAS. Salvage topsoil to a maximum depth of 40 cm, unless a greater depth is specifically noted for selected soils. During spoil where three-lift soils handling has been conducted. Compact the lower lift of spoil prior to backfilling of the upper lift at locations frozen conditions, salvage topsoil from the pipeline construction footprint and all areas to be graded. Refer to Section 8.1 in the Resource where three-lift soils handling has been conducted. Refer to Dwg. 13 [Topsoil Salvage – Three-Lift Soils Handling on Cultivated Land] Specific Mitigation Tables for detailed information related to topsoil properties. Salvage depth at locations where no topsoil depth is provided in Appendix C of the Pipeline EPP. specified on the EAS will be determined in the field at the time of the based on the discretion of an Environmental Inspector. MIGRATORY BIRDS General Topsoil Handling Conditions: Salvage topsoil from all areas to be graded and excavated. The area salvaged is to correspond to the area that is to be graded. Topsoil must be salvaged on all lands, except for areas of disturbed land and areas with rocky outcrops The bird nesting periods indicated in the additional features box are applicable where suitable nesting habitat is present. In the vent (unless otherwise specified). Implement topsoil handling procedures provided in Section 7.0 and Section 10.0 of the Pipeline EPP during that clearing or construction activities are schedules to commence within the bird nesting period, consult with an Environmental Inspector topsoil salvage operations. Topsoil salvage procedures to be implemented are described below. or Wildlife Resource Specialist to determine the need to conduct a non-intrusive area search for evidence of nesting (e.g., presence of territorial males, alarm calls, distraction displays, adults carrying nesting material/food). Implement the wildlife mitigation measures Recommended Stripping Method applicable to nesting birds from Section 7.0 of the Pipeline EPP when constructing in areas of suitable nesting habitat within the bird Land Type Frozen Non-frozen nesting period. Refer to Section Table 4.2-1 and 4.2-2 of Section 4.2 of the Resource Specific Mitigation Tables for site-specific location All land uses (except level well-sodded lands and wetlands) Blade Width or Full Width Full Width information. Areas to be graded or excavated and Agricultural Land Reserves (ALR) lands in British Columbia (BC) Full Width Full Width

Disturbed lands, rocky outcrops (RO soil units) and deep undeveloped Organic soils (e.g., DEV2 soil type) No Salvage No Salvage

Full Width - Reduce Where Feasible (FW): Salvage topsoil from the trench and spoil storage areas, and from the pipe makeup, and primary and secondary work lanes of the construction footprint on all locations, to minimize the potential for topsoil/subsoil mixing. Topsoil salvage methods may be reduced where feasible and approved by the Environmental Inspector. Full Width salvage is also required during frozen conditions on all ALR lands (in BC), where grading is required and areas where pipe installation cannot be completed on frozen topsoil. The subsoil must be sufficiently decompacted and levelled prior to returning the surface material (topsoil) over the areas stripped of this material during clean-up. See the following drawings in Appendix C of the Pipeline EPP: x Dwg. 7 [Topsoil Salvage on Agriculture Lands – Full Width] x Dwg. 8 [Topsoil Salvage in Forest – Full Width] x Dwg. 9 [Topsoil Salvage in Forest (Graded) – Non-Frozen] x Dwg. 11 [Topsoil Salvage in Non-Agricultural Lands (Graded) – Frozen] x Dwg. 12 [Steep Sidehill Grading]

Evaluate Site-Specific Handling (SSH): Areas that have been identified as unsuitable for full width stripping which require alternate soil handling procedures have been identified with the label “Evaluate Site-Specific Handling (SSH)” in the EAS. Locations include areas identified during soil field surveys as well as wetlands, watercourses, riparian areas and roads. Areas of SSH on the EAS may not be a comprehensive list of all areas requiring site-specific soil handling procedures. Site-specific soil handling procedures should be determined in the field at the time of construction based on the discretion of an Environmental Inspector, in consultation with Trans Mountain and a Soils Specialist. Refer to the Resource Specific Mitigation Tables Section 6.0 for locations of wetlands and Section 7.0 for locations of watercourses.

Topsoil Stripping Not Required (--): Areas with no topsoil do not require topsoil stripping, but surface material may be salvaged at the discretion of the EI or a Soils Specialist to aid in reclamation efforts.

Half-Width: Salvage topsoil from the trench and spoil storage areas on the construction footprint where the designated workspace does not allow windrowing of the topsoil adjacent to the area being stripped, or in areas where the topsoil is consistently thicker than approximately 35 cm. There may be limitations for use of the work side if the topsoil becomes wet or saturated and the risk of soil deformation becomes high. If the risk is high, mats may be required to protect the topsoil from impact during pipe installation.

Blade Width: Salvage topsoil from a blade width (i.e., approximately 4-6 m) centred over the trench (see Dwg. 10 [Topsoil Salvage on All Land Uses – Blade Width] provided in Appendix C of the Pipeline EPP) on all locations where the topsoil remains frozen for the duration of pipe installation (except ALR lands and areas that require grading). Blade Width salvage may also be effective on well- sodded, level ground where the trench spoil can readily be removed from the spoil storage area without scalping the sod.

Modification of Topsoil Salvage Width: Refer to Section 10.0 of the Pipeline EPP for mitigation measures pertaining to increased topsoil salvage width for the protection of environmental features or topsoil resources.

Thick Topsoil: Site-specific handling will be evaluated by the Contractor, in consultation with the Environmental Inspector at locations with thicker top soil based on workspace availability and environmental conditions.

INDEX SHEET 4 of 12

SITE-SPECIFIC ENVIRONMENTAL MITIGATION NOTES AG-Note 3: Organic Lands – Implement applicable mitigation measures outlined in the Agricultural Management Plan. Ensure construction activities do not threaten the certification of the organic farm, and do not introduce foreign substances (e.g., pesticides, Mitigation measures for each of the resource-specific features are provided in the environmental notes below. More detailed mitigation herbicides or chemicals) unless with prior approval of the landowner and Certification Board. All material imported onto organic lands measures can be found in the Pipeline EPP. The environmental notes are associated with potential environmental issues and are must meet certification requirements and be approved for use by an Environmental Inspector. Ensure equipment cleaning methods, arranged by discipline in the following categories: and weed treatments, are not in contravention with organic land requirements. Refer to Section Table 1.2-1 of Section 1.2 of the Resource Specific Mitigation Tables for site-specific mitigation and location information. Resource Feature Note Prefix Resource Feature Note Prefix AG-Note 4: Cranberry and Mixed Berry Farms – Refer to the line list and special conditions in the landowner agreement for site- Soils SO Reclamation RC specific requirements. Detailed mitigation measures have been developed for these farms and are included in the landowner agreement Agriculture AG Traditional Land Use TLU that must be reviewed prior to accessing these lands and commencing construction activities. Refer to Section Table 1.2-1 of Section Archaeology AK Vegetation VG 1.2 of the Resource Specific Mitigation Tables for site-specific mitigation and location information. Watercourses AQ Wildlife WF AG-Note 5: Turf Farm – Notify landowners in advance of construction to allow turf farm operators the opportunity to remove turf prior Geology (Acid Rock Drainage, Bedrock) GEO Wetlands WT to construction. Survey the construction footprint prior to construction to identify irrigation and drainage systems. Maintain irrigation, Hydrology HY access and site drainage or ensure provision of alternate sources as needed. Re-establish irrigation, drainage and access following construction. Refer to Section Table 1.2-1 of Section 1.2 of the Resource Specific Mitigation Tables for site-specific mitigation and SOILS location information. SO-Note 1: Soil Erosion by Wind—Suspend topsoil handling operations if drifting or topsoil loss is evident due to erosion by wind. AG-Note 6: Container Nursery Farms – Maintain water lines, adhere to site-specific biosecurity protocols and ensure continued Implement the erosion control measures outlined in Section the Soil Erosion and Sediment Control Contingency Plan (Appendix B of access is maintained to container beds during construction as needed. Notify the landowner in advance of construction to allow for the the Pipeline EPP). relocation and re-establishment of production systems. If production systems cannot be maintained during construction, ensure SO-Note 2: Compaction and Rutting—Work during dry and/or frozen soil conditions, where feasible, to ensure that there is sufficient provisional systems (i.e., water lines) are put in place as necessary. Ensure irrigation, drainage, nursery beds and access are re- frost or low soil moisture to allow construction to take place without causing rutting or compaction (as determined by an Environmental established following construction. Refer to Section Table 1.2-1 of Section 1.2 of the Resource Specific Mitigation Tables for site-specific Inspector in discussion with the Construction Manager or designate). Implement measures outlined in the Wet/Thawed Soils mitigation and location information. Contingency Plan (Appendix B of the Pipeline EPP) to minimise compaction and rutting of susceptible soils. AG-Note 7: Agricultural Land Reserve British Columbia – Implement the topsoil handling measures outlined in Section 10.0 of the SO-Note 3: Unstable Trench or Potentially Unstable Trench—If trench instability or potential trench instability is listed on the EAS Pipeline EPP and adhere to the applicable permit conditions. Ensure a person with extensive soils handling experience is on site during or is anticipated, salvage topsoil from a wider area to accommodate a wider trench and the spoil generated from that trench. Store topsoil handling (salvage and replacement) activities on ALR lands. salvaged topsoil at a sufficient distance from the trench so that topsoil does not slough into the trench if the walls collapse, and so that AG-Note 8: Blueweed Containment Area – No parking of vehicles or equipment on vegetated areas within containment zone. Vehicles trench spoil does not slough back into the trench and has to be re-excavated. Additional spoil storage space will be needed to and equipment traveling through the containment zone will be cleaned regularly and routinely inspected (undercarriage and wheels) to accommodate the additional spoil material generated by the widened trench and the spoil that has sloughed back into the trench. ensure there is no movement of seed or plant fragments to areas outside the containment zone. Unnecessary access through SO-Note 4: Unsurveyed Lands—Adhere to the general pipeline construction mitigation measures outlined in Sections 7.0 and 10.0 of containment zone will be restricted whenever practical. Earth moving equipment will be thoroughly cleaned before leaving the the Pipeline EPP. Develop mitigation measures in co-operation with an Environmental Inspector, the Environmental Compliance containment zone. Refer to Table 1.3-1 in Section 1.3 of the Resource Specific Mitigation Tables and the Biosecurity Management Manager, and the Environmental Manger, if the measures identified in the Pipeline EPP prove to be ineffective or should soils have section (Appendix G of the Pipeline EPP). characteristics that are prone to erosion (by wind or water), sloughing, pulverisation, compaction, and/or rutting. AG-Note 9: Potential Soil Borne Pathogens – Locations where biosecurity measures are implemented will be determined in SO-Note 5: Existing Foreign Topsoil Berms – Remove the topsoil berm prior to construction. Adhere to the general topsoil salvage consideration of landowner input, existing land use, and the presence of site-specific environmental considerations (e.g., soil pathogens, and topsoil handling measures outlined in Sections 7.0 and 10.0 of the Pipeline EPP. Salvage the topsoil underneath the berm. Stripping organic farm lands, dairy operations, berry farms, high density weed areas or provincial park boundaries). These locations will be depths and soil handling measures should be assigned in co-operation with the Environmental Inspector, the Environmental Compliance documented in an appendix to the Biosecurity Plan and made accessible to contractors and the NEB in the Project permit binder. Avoid Manager, and the Environmental Manager. movement of soil between land uses and quarter-sections to prevent the potential spread of soil borne pathogens. Ensure all vehicles, (trucks or ATVs) and equipment driving on topsoil or involved in clearing and topsoil handling activities arrive on site in a clean condition. SO-Note 6: Soil Erosion by Water – Implement erosion control measures outlined in Sections 7.0 and 10.0 of the Pipeline EPP to During clearing and topsoil handling activities (salvage and replacement), equipment will be mechanically cleaned (Level 1) at prevent soil erosion by water. In the event erosion occurs, implement the Soil Erosion and Sediment Control Contingency Plan designated locations, and pressure washed (Level 2) and disinfected with a 1-2 % bleach solution (Level 3) at designated locations (Appendix B of the Pipeline EPP). where the risk of clubroot is moderate to high. Refer to Table 1.3-1 in Section 1.3 of the RSMTs for site-specific mitigation and location SO-Note 7: Poor Quality Lower Subsoils – Segregate and store the better-quality upper-lift subsoil separately from the poorer-quality information for areas where soil borne pathogens are of concern. Implement applicable measures outlined in Section 7.0 of the Pipeline lower-lift subsoil. Ensure that the poorer-quality lower lift of subsoil is backfilled and compacted before the better-quality upper lift of EPP and the Biosecurity Management section (Appendix G of the Pipeline EPP). subsoil is replaced where three-lift soils handling has been conducted. Refer to Dwg. 13 [Topsoil Salvage – Three-Lift Soils Handling HERITAGE on Cultivated Land] provided in Appendix C of the Pipeline EPP. AK-Note 1: Heritage Site – Refer to Section 2.0 of the Resource Specific Mitigation Tables for site-specific mitigation requirements. SO-Note 8: Moderate, High Risk, and Confirmed Contamination – Refer to Table 8.3-1 and Table 8.3-2 in Section 8.3 of the Suspend work within 30 m of archaeological features (e.g., arrowheads, modified bone, pottery fragments or fossils) discovered during Resource Specific Mitigation Tables for location information, site descriptions, and potential contaminants of concern. Ensure a construction. No work at that particular location shall continue until permission is granted by the Appropriate Government Authority. Contamination Resource Specialist directs the assessment of potential contamination indicators (i.e., groundwater sheen and adjacent Follow the contingency measures identified provided in the Heritage Resources Contingency Plan in Appendix B of the Pipeline EPP. soil staining) during trench excavation in areas where there is high potential for encountering contamination (e.g., known areas of existing contamination) as identified in the Contamination Identification and Assessment section (Appendix G of the Pipeline EPP). AK-Note 2: Paleontological Site – Refer to Section 2.0 of the Resource Specific Mitigation Tables for site-specific mitigation Implement the Contamination Discovery Contingency Plan (see Appendix B of the Pipeline EPP) in the event that unidentified requirements. Construction monitoring by a professional paleontologist is required for all open-cut excavation at paleontological sites. contaminated soils or groundwater are discovered during construction. Adhere to applicable measures provided in the Hydrovac Suspend work within 30 m of paleontological features (e.g., fossils) discovered during construction. No work at that particular location Cuttings and Disposal Management Plan and Waste Management Plan (Appendix G of the Pipeline EPP) for handling and disposal of shall continue until permission is granted by the appropriate regulatory authority. Follow the contingency measures identified provided contaminated material. in the Heritage Resources Discovery Contingency Plan in Appendix B of the Pipeline EPP SO-Note 9: Overstrip Textured Soils—Overstrip topsoils at select locations with saline or sodic lower subsoils, or sand/gravel textures WATERCOURSES at depths which occurs on native grasslands, treed, irrigated lands and/or areas of high wind erosion. AQ-Note 1: Fish-Bearing – Implement the appropriate measures for fish-bearing watercourses outlined in Section 14 of the Pipeline SOCIO-ECONOMICS AND AGRICULTURE EPP and Section 7.0 of the Resource Specific Mitigation Tables. Undertake instream activities for pipeline and vehicle/equipment crossings during the construction work window indicated, where feasible, unless otherwise specified in Section 7.0 of the Resource AG-Note 1: Specialty Field Crops—Ensure production systems continue to operate during construction activities, or provision of Specific Mitigation Tables. Salvage of fishes is required at all fish-bearing watercourses, where an isolated crossing method is used. suitable alternatives as needed, and successfully re-established during clean-up. Critical production system components may include Water quality monitoring will be required unless otherwise specified. All instream works to be conducted in isolation of flowing water. irrigation and drainage lines, power to production facilities and continued access to fields during construction. Refer to Section Table 1.2-1 of Section 1.2 of the Resource Specific Mitigation Tables for site-specific mitigation and location information. AQ-Note 2: Non-Fish-Bearing – Implement the appropriate measures for non-fish-bearing watercourses outlined in Section 14 of the Pipeline EPP and Section 7.0 of the Resource Specific Mitigation Tables. Water quality monitoring is required where indicated on the AG-Note 2: Livestock Operations – Notify the landowner of the construction schedule in advance to allow for the relocation and Environmental Alignment Sheets, and Section 7.0 of the Resource Specific Mitigation Tables. re-establishment of production systems. Critical production system components may include water lines, implementing biosecurity protocols, restricting cattle from the construction zone and maintaining continued access to fields across the pipeline construction footprint during construction. Ensure all water lines, fencing and corral systems are re-established following construction. Refer to Section Table 1.2-1 of Section 1.2 of the Resource Specific Mitigation Tables for site-specific mitigation and location information. INDEX SHEET 5 of 12

AQ-Note 3: Navigable Waters – Adhere to the notification measures provided in Section 5.0 of the Pipeline EPP for Navigable RC-Note 3: Reclamation Seed Mixes – Refer to Section 9.0 of the Resource Specific Mitigation Tables for seed mixes listed by Watercourses. Notify recreational boaters of the hazards associated with instream construction in accordance with NEB requirements Reclamation Unit. Refer to Sections 5.6 to 5.8 of the Reclamation Management Plan for measures specific to seed mix and cover crop or approval conditions for navigable waters. Place warning signs (e.g., “Construction Ahead - Travaux de Construction”) up and selection, application techniques and timing (seasonal) considerations. downstream from all crossings of watercourses deemed navigable. Adhere to requirements for work site markings (e.g., cautionary RC-Note 4: Candidate Access Management – Candidate access management locations have been identified on the map face of the lighting or buoys) from dusk to dawn and during periods of restricted visibility. Assistance with the safe portage of small watercraft EAS with an “AC- “prefix followed by a unique number, which relates to the unique identification listed in Section 1.4 of the Resource across the work site may be required. Refer to the Navigation and Navigation Safety Plan provided in Section 8.0 of Volume 6 of the Specific Mitigation Tables. The candidate locations are approximate; they do not represent the final access control locations. The Environmental Plans for signage and work site marking specifications. Environmental Inspectors, in consultation with the Construction Manager or designate, will use the candidate locations and the decision AQ-Note 4: Potentially Navigable Waters – Recreational use of potentially navigable waters is unlikely, but remains possible with frameworks in the Access Management section (Appendix G of the Pipeline EPP) to identify suitable site-specific locations and small watercraft, such as canoes/kayaks. Construction during open water conditions should remain vigilant for the potential presence measures for access management in the field, based on site-specific conditions. The EAS map face has a limited view to the area of recreational users. Place warning signs upstream and downstream from all crossings of watercourses deemed potentially navigable, directly around the Pipeline Construction Footprint; therefore, not all locations with candidate access management points on the and work site markings, as outlined in the Navigation and Navigation Safety Plan (Section 8.0 of Volume 6 of the Environmental Plans) temporary access roads appear on the map. if there are open water conditions for the period of instream works. Assistance with the safe portage of small watercraft across the work site may be required. TRADITIONAL LAND USE AQ-Note 5: Fish-Bearing Species at Risk Act (SARA) Watercourses and Critical Habitat – Implement the appropriate measures TLU-Note 1: TLU/TLRU Site – Implement the mitigation measures for traditional land use (TLU) and traditional land and resource use for fish-bearing watercourses identified as containing SARA-listed species and Critical Habitat outlined in Section 14 of the Pipeline (TLRU) sites outlined in Section 3.0 of the Resource Specific Mitigation Tables. Implement the contingency measures identified in the EPP and Section 7.0 of the Resource Specific Mitigation Tables. Undertake instream activities for pipeline and vehicle/equipment Traditional Land Use Sites Discovery Contingency Plan (Appendix B of the Pipeline EPP) in the event traditional land use sites not crossings at fish-bearing watercourse crossings during the construction work window indicated (i.e., the window of least-risk for previously identified are found during pipeline and associated component construction. proposed crossings in BC and outside the Restricted Activity Periods [RAPs] for proposed crossings in Alberta), unless otherwise TLU-Note 2: TLU/TLRU Site – Implement the mitigation measures for traditional land use (TLU) and traditional land and resource use specified in Section 7.0 of the Resource Specific Mitigation Tables. Salvage of fishes is required at all fish-bearing watercourses, where (TLRU) sites outlined in Table 3.0-3 and Table 3.0-4 Resource Specific Mitigation Tables. Implement the contingency measures an isolated crossing method is used, and must also follow safe handling measures prescribed by Fisheries and Oceans Canada (DFO). identified in the Traditional Land Use Sites Discovery Contingency Plan (Appendix B of the Pipeline EPP) in the event traditional land Water quality monitoring will also be required. Site-specific mitigation and/or reclamation measures may be required. Works that may use sites not previously identified are found during pipeline and associated component construction. impact the riparian areas within critical habitat may require a SARA Act compliant Fisheries Act authorization. Refer to the Nooksack Stó:Lō-Note 1: – Refer to Table 3.0-3 and Table 3.0-4 of the Resource Specific Mitigation Tables for more information on the site and Dace and Salish Sucker Management Plan provided in Section 8.0 of Volume 6 of the Environmental Plans in the event that a trenchless site-specific mitigation measures to be implemented. Implement the contingency measures identified in the Traditional Land Use Sites crossing is not feasible. In the event that any aquatic Schedule 1 SARA listed species are unexpectedly encountered, refer to the Fish Discovery Contingency Plan (Appendix B of the Pipeline EPP) in the event traditional land use sites not previously identified are found Species of Concern Contingency Plan (Appendix B of the Pipeline EPP). during pipeline and associated component construction. AQ-Note 6: Fish-Bearing Wetlands – Implement the appropriate measures for fish-bearing wetlands outlined in Section 14.0 of the Pipeline EPP and Section 7.0 of the Resource Specific Mitigation Tables. Salvage of fishes is required at all fish-bearing wetlands. If VEGETATION water is present, undertake instream activities for pipeline and vehicle/equipment crossings during the construction work window, where VG-Note 1: Rare Plant and Rare Ecological Communities – Adhere to the general pipeline construction mitigation measures found feasible, where an isolated crossing method is used. Water quality monitoring will be required unless otherwise specified and approved in Section 7.0 of the Pipeline EPP. Implement the appropriate site-specific mitigation measures related to known rare vascular plants, by the Environmental Inspector. Where an isolated crossing method is not feasible, instream works are to be isolated from adjacent rare lichens, rare liverworts, rare mosses and rare ecological communities of concern as identified in Section 5.1 of the Resource open water sections with sediment/turbidity curtains. Specific Mitigation Tables. Follow the Rare Ecological Community and Rare Plant Population Management section (Appendix G of the GEOLOGY Pipeline EPP). GEO-Note 1: Potentially Acid Generating (PAG) Rock – Refer to Table 8.2-1 in Section 8.2 of the Resource Specific Mitigation VG-Note 2: Final, Candidate Regeneration, and Early Draft Critical Habitat as identified by Environment and Climate Change Tables for location information. Inspection of bedrock must be conducted by a qualified person or qualified person-trainee for the Canada (ECCC) – Adhere to the general pipeline construction mitigation measures found in Section 7.0 of the Pipeline EPP. Within presence of sulphides or characteristics suggesting material may be permissive of Metal Leaching/Acid Rock Drainage (ML/ARD) early draft critical habitat mitigation is applicable to where the biophysical attributes of critical habitat are present, which may not include conditions. Excavated PAG or sulphide-bearing rock should be maximized as trench backfill and, if volumes exceed backfill capacities, the full extent of early draft critical habitat areas. Areas where the biophysical attributes of critical habitat are present are identified in Section 5.1 of the Resource Specific Mitigation Tables and the Rare Ecological Community and Rare Plant Population Management material will be stored above ground at sites adhering to characteristics described in the ML/ARD Management Plan Section 4.1 of the Plan. Volume 6 Environmental Plans). For areas with exposed PAG surfaces (e.g., rock cuts), refer to the ML/ARD Management Plan for possible mitigation strategies to manage acidic and/or metal-rich runoff. Monitoring protocols should be initiated for areas with Final critical habitat has been identified in a posted (final or proposed) federal Recovery Strategy. Where this has been mapped, ECCC acidic/metal-rich drainage, at frequencies/testing discussed in the ML/ARD Management Plan. Appropriate field personnel (i.e., is working to make the spatial boundaries publicly available. The information on Final critical habitat was provided to Trans Mountain Environmental Inspector) will be notified of sampled locations, above ground storage sites and areas with observed/monitored for Project planning purposes, and this information has been used by Trans Mountain with the permission of ECCC. drainage/runoff. Information on candidate and early draft critical habitat (mapped areas) is not publicly available but was provided to Trans Mountain by GEO-Note 2: Shallow Bedrock – Refer to Table 8.2-2 in Section 8.2 of the Resource Specific Mitigation Tables for location information. ECCC for Project planning purposes. The information on candidate and early draft critical habitat has been used by Trans Mountain Where ripping or typical trenching methods are not feasible, drill and blast competent bedrock encountered within trench depth. Refer with the permission of ECCC. to Sections 11.0 and 12.0 of the Pipeline EPP for mitigation measures to be implemented while working in areas of bedrock. Refer to VG-Note 3: Alteration of Old Growth Management Areas (OGMAs) – Obtain necessary permits and approvals from the BC Ministry Section 6.0 of the Pipeline EPP for measures related to disposal of bedrock and importation of bedding and padding materials. of Forests, Lands, Resource Operations and Rural Development (MFLNRORD) prior to clearing. Narrow the pipeline construction HYDROLOGY footprint, where practical, to avoid or minimise disturbance within the OGMA. Refer to Section 5.2 of the Resource Specific Mitigation Tables and the Old Growth Management Areas Mitigation and Replacement section provided in Appendix G of the Pipeline EPP. HY-Note 1: Underground Water – Refer to the applicable hydrogeology mitigation measures found in Section 6.0 and Section 7.0 of the Pipeline EPP for shallow groundwater and unconfined aquifers. Flag all field identified wells within 150 m of the pipeline construction VG-Note 4: High Density Weeds (Soil Containment Area) – Ensure topsoil is stored on the land parcel from where it was salvaged. footprint as well as groundwater locations prior to construction to avoid any damage. Where groundwater contamination is suspected, Stake or flag topsoil windrows containing high density weeds. Refer to Section 5.3 of the Resource Specific Mitigation Tables, implement the Contaminated Sites Discovery Contingency Plan (Appendix B of the Pipeline EPP). For site-specific mitigation, refer to Sections 6.0 and 7.0 of the Pipeline EPP, and the Weed and Vegetation Management section (Appendix G of the Pipeline EPP) for the Groundwater Management section provided in Appendix G of the Pipeline EPP. mitigation measures to be implemented in areas where high density weeds are encountered. RECLAMATION VG-Note 5: Cryptogamic Crust Salvage Locations – Salvage cryptogamic crust and store appropriately in accordance with the measures specified in Section 5.4 of the Resource Specific Mitigation Tables. Re-apply the salvaged cryptogamic crust material after RC-Note 1: Riparian Reclamation – Refer to Appendix E and Section 5.2 of the Riparian Habitat Management Plan (Section 8.7 of the surface soils have been replaced and imprinted and prior to seeding. Refer to the Grassland Survey and Mitigation section the Volume 6 Environmental Plans) for target riparian function and associated reclamation measures for riparian buffer zones of (Appendix G of the Pipeline EPP) for additional information. classified watercourses, and the Wetland Survey and Mitigation Plan (Section 7.1 of the Volume 6 Environmental Plans) for reclamation measures at wetlands and associated riparian buffers. Refer to Section 7.0 of the Resource Specific Mitigation Tables for reclamation codes at watercourse crossings, which relate to the instream and bank reclamation measures specified in Table 6-4 of the Reclamation Management Plan (Section 9.1 of the Volume 6 Environmental Plans).

RC-Note 2: Riparian CWD – Refer to Section 10 of the Resource Specific Mitigation Tables for Riparian Habitat Function targets and CWD targets to be retained and replaced in riparian areas where material is available and CWD is compatible with existing land use. On privately owned lands, CWD retention and replacement must align with the landowner agreement. CWD is important to meet reclamation targets for riparian areas with Moderate or High Riparian Habitat Function targets. INDEX SHEET 6 of 12

WILDLIFE AND WILDLIFE HABITAT x Sowaqua Spotted Owl Wildlife Habitat Area – There is no timing constraint associated with this area. However, three spotted owl surveys for 2 consecutive years must be completed prior to Project activity, including one survey within the same year of WF-Note 1: Amphibian Breeding Pond/Stream – Adhere to the general pipeline construction mitigation measures found in Section planned activity. No spotted owls were detected during the surveys completed in 2013, 2015, 2016, 2017, 2018 or 2019. Consult 14.0 of the Pipeline EPP. Schedule clearing/construction activities during the recommended construction timing window where feasible with BC MFLNRORD prior to Project activity within the Sowaqua Spotted Owl Wildlife Habitat Area. Refer to Table 4.2-2B of the (refer to Table 4.1-1 and Table 4.1-2 in Section 4.1 of the Resource Specific Mitigation Tables for site-specific timing windows). If Resource Specific Mitigation Tables for additional mitigation measures required in this area. clearing/construction is scheduled during the sensitive period an amphibian salvage is required prior to clearing/construction where a conventional crossing method is planned (note, amphibians incidentally encountered on the Project Footprint outside of the sensitive x Important Bird Area – Recommended construction window is outside of the migratory bird nesting period provided below: breeding period are also subject to salvage and relocation). Salvages should be conducted as per the conditions of the salvage permit, Douglas Lake Plateau (BC172) - Recommended construction window of August 17 to April 3. generally these should be conducted 2 weeks prior to a wetland crossing (depending on size of wetland) and 3 days prior to a stream WF-Note 6: Final and Proposed Critical Habitat as identified by ECCC – Refer to Section 4.3 of the Resource Specific Mitigation crossing. If a trenchless crossing is planned, a salvage is not required. The Environmental Inspector, with the assistance of a Wildlife Tables for detailed mitigation measures required within the areas of critical habitat. Mitigation is applicable where the biophysical Resource Specialist may recommend the installation of exclusion fencing to prevent amphibians from re-entering the pipeline attributes of critical habitat are present, which may not include the full extent of the mapped areas of final and proposed critical habitat. construction footprint. Implement the mitigation measures for amphibian breeding ponds/streams outlined in Section 4.1 of the Resource For more information, including detailed mitigation measures and locations where areas of final and proposed critical habitat have been Specific Mitigation Tables. For the identified breeding ponds of Great Basin spadefoot, implement the mitigation measures outlined in refined for some species for this Project refer to Table 4.3-1A,B (Lewis’s Woodpecker), Table 4.3-2 (Great Basin Spadefoot), Table 4.3- Table 4.3-2 of the Resource Specific Mitigation Tables. 3A,B (Williamson’s Sapsucker), Table 4.3-4 (Oregon Forestsnail), Table 4.3-5 (Coastal Giant Salamander), Table 4.3-6 (Pacific Water WF-Note 2: Raptor Nest – Adhere to the general pipeline construction mitigation measures for wildlife found in Section 7.0 of the Shrew), Table 4.3-7 (Townsend’s Mole), Table 4.3-8A,B (Western Rattlesnake and Great Basin Gophersnake), and Table 4.3-9 Pipeline EPP. Schedule clearing and construction activities within the buffer of identified raptor nests during the recommended (Western Painted Turtle) in Section 4.3 of the Resource Specific Mitigation Tables. Schedule construction activities during the construction timing windows provided below. In the event clearing/construction activities cannot be scheduled during the recommended recommended construction timing window provided below. timing windows engage a Wildlife Resource Specialist to conduct a site visit to determine the status of the nest. If an active nest is found Final and proposed critical habitat has been identified in a posted (final or proposed) federal Recovery Strategy. Where this has been it will be subject to site-specific mitigation measures (e.g., clearly marked species-specific buffer around the nest and non-intrusive mapped, ECCC is working to make the spatial boundaries publicly available. The information on final and proposed critical habitat was monitoring). Refer to Table 4.1-1 and Table 4.1-2 of the Resource Specific Mitigation Tables for detailed mitigation measures for raptor provided to Trans Mountain for Project planning purposes, and this information has been used by Trans Mountain with the permission nests. of ECCC. x Alberta recommended construction timing window: late July to early March. x British Columbia recommended construction timing windows: x Williamson’s Sapsucker and Lewis’s Woodpecker – Recommended construction window of August 18 to April 3 within Bald Eagle – September 1 to December 31 Williamson’s sapsucker critical habitat and within Lewis’s woodpecker locations of interest. In the event that clearing and Osprey – September 15 to March 31 construction cannot be scheduled during this period, engage a Wildlife Resource Specialist to conduct area searches within 7 days Other raptors (e.g., unidentified hawk nest) – October 1 to February 28 of clearing to identify active nests along the Project Footprint. Refer to Table 4.3-1A (Lewis’s Woodpecker) and Table 4.3-3A Refer to the Guidelines for Raptor Conservation during Urban and Rural Land Development in British Columbia for species- (Williamson’s Sapsucker) for detailed mitigation measures required in this area. In addition, refer to Table 4.3-1B (Lewis’s specific information on sensitive breeding and nesting time periods and buffers for other raptor species (e.g., red-tailed hawk). Woodpecker) and Table 4.3-3B (Williamson’s Sapsucker) for mitigation measures required for identified site-specific habitat features (i.e., suitable nest trees, ant colonies and fruit-bearing shrubs). WF-Note 3: Construction Timing – Implement the general pipeline construction mitigation measures for wildlife found in Section 7.0 of the Pipeline EPP. Adhere to the least risk window/timing constraint applicable to the site-specific wildlife habitat area or wildlife habitat x Great Basin Spadefoot – Great Basin spadefoot breeding ponds identified to date are provided in Table 4.3-2 of the Resource feature where feasible. Notify the appropriate authorities if construction activities are scheduled to occur within the timing restriction. Specific Mitigation Tables. Schedule clearing and construction that encounters identified breeding ponds from July 1 to September Refer to Section 4.1 of the Resource Specific Mitigation Tables for the least risk window/timing constraint for wildlife habitat features, 30. Where clearing occurs adjacent to an identified breeding pond, schedule activities from April 1 to June 30. If clearing cannot Section 4.2 of the Resource Specific Mitigation Tables for the least risk window/timing constraint within provincially identified wildlife be scheduled during these periods, contact BC MFLNRORD to discuss the site-specific circumstances, practical options and areas and Section 4.3 of the Resource Specific Mitigation Tables for the least risk window/timing constraint within critical habitat as mitigation measures. Engage a Wildlife Resource Specialist as necessary to conduct a salvage prior to clearing and construction identified by ECCC or locations of interest (where identified). (as per conditions set out in the salvage permit). Refer to Table 4.3-2 of the Resource Specific Mitigation Tables for detailed mitigation measures. WF-Note 4: Identified Wildlife Area (Alberta) – Refer to Table 4.2-1 in Section 4.2 of the Resource Specific Mitigation Tables for detailed mitigation measures. Schedule construction activities during the recommended construction timing window as provided below. x Oregon Forestsnail – Schedule Project clearing within locations of interest only after a salvage has been conducted and exclusion If construction cannot be scheduled during the recommended window, engage a Wildlife Resource Specialist and consult with Alberta fencing installed. Engage a Wildlife Resource Specialist to conduct a salvage during the active period for Oregon forestsnail Environment and Parks (AEP) to discuss practical options and mitigation measures. (provided below). Refer to Table 4.3-4 for detailed mitigation measures. x Key Wildlife and Biodiversity Zone – Recommended construction window of May 1 to January 14. March 15 to June 30 x Trumpeter Swan Waterbodies – Recommended construction window of October 1 to March 31. September 1 to October 15 prior to winter hibernation x Special Access Zone and Grizzly Bear Zone – There is no timing constraint associated with these areas. Note, Grizzly Bear x Coastal Giant Salamander – Within locations of interest engage a Wildlife Resource Specialist to conduct a salvage (as per Zone includes the Grande Cache and Yellowhead Bear Management Areas. Refer to Table 4.4-1 of the Resource Specific conditions set out in the salvage permit). Generally, a salvage is conducted for three consecutive days prior to clearing. Schedule Mitigation Tables for mitigation measures for grizzly bear. clearing and construction during the fall (i.e., August 31 to November 1) when salamanders can more easily disperse from the WF-Note 5: Identified Wildlife Area (British Columbia) – Refer to Table 4.2-2A in Section 4.2 of the Resource Specific Mitigation area. Refer to Table 4.3-5 of the Resource Specific Mitigation Tables for detailed mitigation measures. Tables for detailed mitigation measures. Schedule construction activities during the recommended construction timing window where x Pacific Water Shrew – Schedule Project activity only after a Pacific water shrew salvage has been completed by a Wildlife applicable (see below). If construction cannot be scheduled during the recommended window, engage a Wildlife Resource Specialist Resource Specialist. The salvage must follow the conditions set out in the salvage permit. Generally, a salvage occurs for 8 and consult with BC MFLNRORD to discuss practical options and mitigation measures as necessary. consecutive nights prior to clearing activities and cannot occur if frost, heavy rainfall or cold temperatures (no less than 3 degrees x Southern Mountain Caribou – Core RangeRecommended construction window of January 16 to November 14. Celsius) are expected to occur. Schedule clearing and construction from September 1 to December 31 to avoid the breeding and x Southern Mountain Caribou – Matrix RangeThere is no timing constraint associated with this range. rearing period. Refer to Table 4.3-6 of the Resource Specific Mitigation Tables for detailed mitigation measures. x Ungulate Winter Range U-3-004 for Wells Gray Caribou Range – Recommended construction window of January 16 to November 14. x Townsend’s Mole – Prior to clearing and construction activities within locations of interest engage a Wildlife Resource Specialist x Ungulate Winter Range U-3-003 for Mule Deer – There is no timing constraint associated with this Ungulate Winter Range to conduct an area search for evidence of Townsend’s mole (e.g., mounds). In the event that evidence of Townsend’s mole is (UWR). present, a Wildlife Resource Specialist will conduct a salvage as per conditions set out in the salvage permit. Schedule clearing x Ungulate Winter Range U-2-006 for Mule Deer and Columbian Black-Tailed Deer – There is no timing constraint associated and construction between the period of June 1 and February 28 to avoid the mole breeding season, where feasible. Refer to Table with this UWR. 4.3-7 of the Resource Specific Mitigation Tables for detailed mitigation measures. x Grizzly Bear Population Unit – recommended construction window (where applicable) is provided below. Refer to Table 4.4-1 of x Western Rattlesnake and Great Basin Gophersnake – Schedule clearing and construction between November 16 and March the Resource Specific Mitigation Tables for mitigation measures for grizzly bear. 14 to avoid the active season for western rattlesnake and Great Basin gophersnake. Where clearing and construction cannot be Robson, Columbia-Shuswap and Wells Gray Population Units: there are no timing constraints associated with scheduled between November 16 and March 14 engage a Wildlife Resource Specialist to complete pre-construction sweep of the these areas. Project Footprint prior to clearing (as per the conditions set out in the salvage permit) to identify and relocate snakes found within the Project Footprint. Refer to Table 4.3-8A of the Resource Specific Mitigation Tables for detailed mitigation measures. In addition, North Cascades: recommended construction window of summer and fall (avoid the winter denning period) refer to Table 4.3-8B of the Resource Specific Mitigation Tables for mitigation measures required for identified site-specific microhabitat features (i.e., talus slopes, rock piles).

INDEX SHEET 7 of 12 x Western Painted Turtle – Schedule clearing and construction between the period of March to October when western painted WF-Note 8: Wildlife and Wildlife Habitat on Federal Lands – Refer to Section 4.5 of the Resource Specific Mitigation Tables for turtles are active and young turtles have emerged from their nest in the spring. Regardless of time of year, prior to clearing and more information. Appropriate field personnel need to be aware if a Species at Risk Act (SARA) Permit has been obtained where the construction activities within locations of interest engage a Wildlife Resource Specialist to conduct a search for Western painted Project interacts with Indian Reserves. A permit is required under Section 73 of SARA if those persons conducting activities on federal turtles. In the event that western painted turtles are present, a Wildlife Resource Specialist will conduct a salvage as per conditions lands that affect species listed as extirpated, endangered or threatened on Schedule 1 of SARA, contravene SARA’s general set out in the salvage permit. Refer to Table 4.3-9 of the Resource Specific Mitigation Tables for detailed mitigation measures. prohibitions. General prohibitions state that no person shall kill, harm, harass, capture or take a wildlife species (Section 32) or damage or destroy the residence of one or more individuals of a wildlife species (Section 33) that is listed as extirpated, endangered or threatened WF-Note 7: Early Draft and Candidate Critical Habitat as identified by ECCC – Refer to Section 4.3 of the Resource Specific on Schedule 1 of SARA. SARA Permit Applications for the Project are under review by ECCC. A SARA Permit may not be needed on Mitigation Tables for detailed mitigation measures required within the areas of critical habitat. Mitigation is applicable where the an Indian Reserve if there is no contravention of the general prohibitions of SARA. For those Indian Reserves that require a SARA biophysical attributes of critical habitat are present, which may not include the full extent of the mapped areas of candidate and early Permit, the terms and conditions of the Permit must be adhered to. draft critical habitat. For more information, including locations where areas of early draft and candidate critical habitat have been refined to date for this Project, refer to Table 4.3-10A,B (Barn Owl), Table 4.3-11 (American Badger), Table 4.3-12A,B (Western Screech-Owl) WF-Note 9: Coarse Woody Debris – Refer to Table 10.1-5 in the Resource Specific Mitigation Tables for target CWD volumes and and Table 4.3-13 (Oregon Spotted Frog) in Section 4.3 of the Resource Specific Mitigation Tables. Schedule construction activities number of stumps to be retained and replaced during reclamation. during the recommended construction timing window provided below. WETLANDS Information on candidate and early draft critical habitat (mapped areas) is not publicly available but was provided to Trans Mountain by WT-Note 1: Wetland – Adhere to the wetland crossing mitigation measures found in Section 14.0 of the Pipeline EPP. A list of wetlands ECCC for Project planning purposes. The information on candidate and early draft critical habitat has been used by Trans Mountain encountered along the construction footprint and associated mitigation measures is provided in Section 6.0 of the Resource Specific with the permission of ECCC. Mitigation Tables. Refer to the Pre-Construction Wetland Survey and Mitigation section (Appendix G of the Pipeline EPP). x Barn Owl—Within locations of interest schedule clearing and construction between September 1 and February 28 to avoid the WT-Note 2: Potentially Navigable Wetland – Adhere to the notification measures provided in Section 5.0 of the Pipeline EPP for sensitive nesting and fledging period for barn owl. Where activities cannot be scheduled during this period, engage a Wildlife navigable wetlands. Notify recreational boaters of the hazards associated with pipeline construction activities in accordance with Resource Specialist to conduct area searches within 7 days of clearing activities to locate active barn owl nests along the Project National Energy Board (NEB) requirements or approval conditions for Navigable Wetlands. Place warning signs (e.g., “Warning – Footprint. Refer to Table 4.3-10A for detailed mitigation measures. In addition, refer to Table 4.3-10B of the Resource Specific Pipeline Construction Ahead”) on both sides of the navigable wetland crossing. For wetland complexes identified as potentially Mitigation Tables for mitigation measures required for identified site-specific suitable nest trees. navigable, refer to Tables 6.0-1 and 6.0-2 in the Resource Specific Mitigation Tables for the individual component that is navigable as x American Badger— Within locations of interest prior to clearing and construction activities engage a Wildlife Resource Specialist the entire complex will not require navigability signage (i.e., only the portion with open water will require signage). Refer to the Navigation to conduct pre-construction sweeps (1-2 weeks prior to clearing) to search for active dens from April 1 to July 15 (maternal and and Navigation Safety Plan. summer dens) and from July 15 to the onset of snowfall (winter dens). Refer to Table 4.3-11 of the Resource Specific Mitigation WT-Note 3: Wet Area – Adhere to the general construction mitigation measures for potentially wet low-lying areas in Section 8.0 of the Tables for detailed mitigation measures. Pipeline EPP. Implement the Wet/Thawed Soils Contingency Plan in Appendix B of the EPP, when soils that are too wet to support a x Western Screech-owl (macfarlanei and kennicottii ssp.)— Within locations of interest schedule clearing and construction particular construction activity. These areas include ecosystems that possess wetland vegetation characteristics, low areas (e.g., flood between August 26 and February 16 to avoid the sensitive nesting and fledging period for western screech-owl. Where clearing associations), and deep water due to anthropogenic disturbances (i.e., artificial ponds, borrow pits), but do not meet the vegetation, and construction cannot be scheduled between August 26 and February 16 engage a Wildlife Resource Specialist to conduct area hydrological and/or soil requirements to be classified as a wetland. Refer to Section 6.0 of the Resource Specific Mitigation Tables. searches prior to clearing in locations of suitable habitat to locate active western screech-owl nests along the Project Footprint. Wetland-specific mitigation measures are not required for these features. Refer to Table 4.3-12A of the Resource Specific Mitigation Tables for detailed mitigation measures. In addition, refer to Table 4.3- WT-Note 4: Wetland Complex – Adhere to the wetland crossing mitigation measures found in Section 14.0 of the Pipeline EPP while 12B of the Resource Specific Mitigation Tables for mitigation measures required for identified site-specific suitable nest trees. crossing complex wetlands (consisting of multiple wetland types and classes). A list of wetland complexes encountered along the x Oregon Spotted Frog – Within locations of interest schedule clearing and construction from August 15 to September 30 during construction footprint is provided in Section 6.0 of the Resource Specific Mitigation Tables. Refer to the Pre-Construction Wetland the active period for Oregon spotted frog. Engage a Wildlife Resource Specialist to conduct a salvage prior to clearing and Survey and Mitigation section provided in Appendix G. construction as set out in the salvage permit (e.g., generally salvages occur 2 weeks prior to initiating clearing activities). Refer to WT-Note 5: Wetland Off Main Pipeline Right-Of-Way – see Section 6.0 of the Resource Specific Mitigation Tables for wetlands within Table 4.3-13 of the Resource Specific Mitigation Tables for detailed mitigation measures. a drag section that are not located within the main pipeline right-of-way. Refer to the Pre-Construction Wetland Survey and Mitigation section (Appendix G of the Pipeline EPP).

INDEX SHEET 8 of 12

LEGEND JURISDICTIONS AGRICULTURAL LAND USES See the Jurisdiction Band1 See the Socio-Economic Considerations band

KP Start KP End County / Municipality Agriculture Type General Description Alberta Unique Agricultural Organic Farm Lands Organic fruit and vegetable production lands or organic poultry/livestock 0.00 2.24 Sherwood Park Operations Container Nursery Farm Container nursery with recognizable irrigation systems and nursery beds 2.24 45.62 City of Edmonton Turf Farm Intensive commercial sod production 45.62 134.00 Parkland County Cranberry Farm Cranberry fields and fields with more than one berry crop 134.00 338.03 Yellowhead County Mixed Berry Field Mixed berry fields with more than one berry crop in the construction footprint British Columbia Livestock Operations Livestock (Beef) Beef/feed lot within the construction footprint 489.16 544.75 Fraser-Fort George Regional District Livestock (Equestrian) Barns, paddocks and riding ring 544.75 825.04 Thompson-Nicola Regional District Livestock (Dairy) Dairy barns within the construction footprint 825.04 840.87 City of Kamloops Livestock (Farm Yard) Farm land with recognizable livestock barns and/or corrals Livestock (Poultry) Poultry facility within the construction footprint 840.87 922.65 Thompson-Nicola Regional District Specialty Field Crops Vineyard Grape fields 922.65 936.24 Fraser Valley Regional District Field Nursery Field production tree nursery with recognizable irrigation systems 936.24 989.34 District of Hope Raspberry Cultivation Raspberry fields 989.34 1079.95 Fraser Valley Regional District Blueberry Cultivation Blueberry fields 1079.95 1106.06 City of Chilliwack 1106.06 1136.02 City of Abbotsford 1136.02 1155.69 Greater Vancouver HIGH DENSITY WEED SPECIES 1155.69 1167.17 City of Surrey See the Terrestrial Features band 1167.17 1174.69 City of Coquitlam EAS Label Species 1174.69 1180.06 City of Burnaby AC Reed canarygrass Note: 1 Smaller jurisdictions (e.g., parks) crossed by the Project are indicated on the EAS. BD Butterfly bush BU Burdock species CL Cutleaf blackberry CT Canada thistle LAND USES DK Diffuse knapweed See the Land Use band DT Dalmatian toadflax Land Use1 HA Hoary alyssum (EAS Label if Applicable) Description HI Himalayan blackberry Bush Pasture Land predominantly used for grazing with overgrown vegetation HO English holly Cleared Land that has had the trees removed but was never ploughed HS Hawkweed species Cultivated Land used for the purposes of growing crops (excluding hay crops) HT Common hound's-tongue Disturbed Land (DL) Industrial or residential land or soils that have been disturbed due to prior construction activity HU Narrow-leaved hawkweed Farm Yard Land used for agricultural purposes IM Policeman's helmet Hay Land used primarily for hay production JK Japanese knotweed Native Grassland Land that supports native grass vegetation KH King-devil hawkweed Open Water (O) Areas of depression with standing water KS Knapweed species Pasture Cleared land predominantly used for grazing MB Tall buttercup Recreational Land designated for recreational use (e.g., ball park and golf course) MH Meadow hawkweed River Major watercourses MK Meadow knapweed Tame Pasture (TAME-PAST) Cleared land that is not being actively cultivated and does not support native grass vegetation and is predominantly used for grazing MN Small touch-me-not Tree Farm Land used primarily for commercial tree production OD Oxeye daisy Tree Farm – mixed berries Land used primarily for commercial production of berries and fruits OG Orchard-grass Treed (T) Areas that are treed (a description of tree species present is available in the site inspection list of the soils technical reports) OH Orange hawkweed Treed Pasture (T-PAST) Areas that are a mixture of trees and pasture H Poison hemlock PS Perennial sow-thistle QH Queen-devil hawkweed SC Sulphur cinquefoil SH Scentless chamomile SK Spotted knapweed TC Common tansy TR Tansy ragwort WP Whiplash hawkweed YG Yellow archangel YH Yellow hawkweed YT Yellow/common toadflax

INDEX SHEET 9 of 12

WILDLIFE AND WILDLIFE HABITAT RARE PLANT AND RARE ECOLOGICAL COMMUNITIES See the Terrestrial Features band See the Terrestrial Features band EAS Label (Top) Associated Feature Name Feature Code Common Names Columbia spotted frog Amphibian Breeding Pond Rare Plants and Lichens ANEMCAN Canada anemone Long-toed salamander BOTRALA Alaska moonwort Great Basin spadefoot BOTRASC Upswept moonwort Northern Pacific tree frog BOTRCRE Dainty moonwort Northern red-legged frog BOTRECH Echo moonwort Northwestern salamander BOTRMIC Michigan moonwort BOTRMON Mountain moonwort Roughskin newt CARECAN Silvery sedge Unidentified tadpoles CARDPRA Toothed bittercress Western toad CONOSAL Snakeskin liverwort Western toad and Columbia spotted frog COPTTRI Three-leaved goldthread EPILHOR Hornemann's willowherb Wood frog GYMNDIS Crested wood fern Coastal tailed frog Amphibian Breeding Stream HYDRTEN Pacific waterleaf Northwestern salamander NAJAFLE Slender naiad Bald eagle nest Raptor Nest ONCOVIR Green spur-fruited fork moss Barred owl nest PELISP Pellia species PHYSCHL Physciella lichen Osprey nest PYROELL White wintergreen Peregrine falcon nest RACOAFF Racomitrium moss Red-tailed hawk nest SARMSAR Sarmenthypnum moss Oregon forestsnail final critical habitat Final Critical Habitat1 Rare Ecological Communities Pacific water shrew final critical habitat ABIEAMA Amabilis fir – western redcedar/devil's club Moist Submaritime ARTETRI Big sagebrush/bluebunch wheatgrass Townsend’s mole final critical habitat BETUNAN Scrub birch/water sedge Williamson’s sapsucker final critical habitat CAREROS Beaked sedge marsh Lewis’s woodpecker final critical habitat DRYOCRI Crested wood fern Great Basin spadefoot final critical habitat EQUIFLU Swamp horsetail – beaked sedge marsh Coastal giant salamander final critical habitat FESTCAM Rough fescue – bluebunch wheatgrass JUNCBAL Baltic rush – common silverweed 2 Proposed Critical Habitat LEYMCIN Giant wildrye Herbaceous Vegetation PICEMAR Black spruce/skunk cabbage/peat-mosses PINUCON Lodgepole pine/peat-mosses Very Dry Maritime Western rattlesnake proposed critical habitat Lodgepole pine/velvet-leaved blueberry/clad lichens Ponderosa pine/bluebunch wheatgrass Great Basin gophersnake proposed critical habitat Ponderosa pine/bluebunch wheatgrass – rough fescue Western painted turtle proposed critical habitat POPUTRE Trembling aspen/common snowberry/Kentucky bluegrass Barn owl candidate critical habitat Candidate Critical Habitat3 Trembling aspen/common snowberry mountain sweet-cicely American badger early draft critical habitat Early Draft Critical Habitat4 POPUTRI Black cottonwood–red alder/salmonberry PSEUMEN Douglas-fir/common snowberry – Saskatoon PSEUSPI Bluebunch wheatgrass – junegrass Oregon spotted frog early draft critical habitat SALIBEB Beaked willow/red-osier dogwood shrubland Bebb's willow/bluejoint reedgrass Western screech-owl early draft critical habitat SALIEXI Narrow-leaf willow Shrubland North Saskatchewan River Key Wildlife and Biodiversity Zone Wildlife Area SALISIT Sitka willow/Sitka sedge Athabasca River Key Wildlife and Biodiversity Zone SALISPP Willow species/ostrich fern SCHOACU Hard-stemmed bulrush Deep Marsh Trumpeter Swan Waterbody TYPHLAT Common cattail Marsh Special Access Zone THUJPLI Western redcedar – Douglas-fir/false Solomon's seal Grizzly Bear Zone Western redcedar – Douglas-fir/vine maple Wells Gray Caribou Range Western redcedar – paper birch/oak fern Western redcedar – Sitka spruce/skunk cabbage Groundhog Caribou Range Western redcedar/slough sedge Ungulate Winter Range Western redcedar/sword fern Dry Maritime Sowaqua Spotted Owl Wildlife Habitat Area Western redcedar/sword fern-skunk cabbage Important Bird Area Critical Habitat1 AZOLMEX Mexican mosquito fern final critical habitat Notes: 1 Final: Federal Recovery Strategy and critical habitat have gone through all phases of review and the process is complete. This information is publicly available in a BROTROE Roell’s brotherella moss early draft critical habitat posted Recovery Strategy. ROTARAM Toothcup final critical habitat 2 Proposed: Federal Recovery Strategy has completed all stages of regional review and pre-registry consultation. The recovery strategy’s next step is to be posted on PINUALB Whitebark pine proposed critical habitat the Species at Risk Public Registry for a 60-day consultation as a 'proposed' recovery strategy. This information is publicly available in a posted Recovery Strategy. Note: 1 Refer to the notes of the Wildlife and Wildlife Habitat table for definitions of critical habitat. 3 Candidate: Federal Recovery Strategy has completed an internal review and has been partially vetted by BC and (if relevant) other agencies (i.e., Fisheries and

Oceans Canada or Parks Canada). This information is not publicly available and is provided with the permission of ECCC.

4 Early Draft: Federal Recovery Strategy has not completed an internal federal review. This information is not publicly available and is provided with the permission of ECCC.

INDEX SHEET 10 of 12

WETLANDS DESCRIPTIONS See the Hydrology (Wetlands and Watercourses) band Dominant Wetland Class General Wetland Class Characteristics Wetland Type Description of Wetland Type Bog Wetlands that have a water table at or near the surface. Stagnant water Treed bog Black spruce dominate the upper story with sphagnum mosses. without water flow. Depend on precipitation for water inputs. Fen Peat accumulating wetlands that tend to have their surfaces level with the Non-treed fen Herbaceous-dominated vegetation communities with brown mosses present. water table and typically have water flow on the surface as well as subsurface. Shrubby fen Upper story of the vegetation community dominated by shrubs, such as Labrador tea, willows and birches. Treed fen Tamarack dominate the upper story with brown mosses. Swamp Mineral wetlands with up to 20-cm peat veneer. The water table is typically at Broad leafed tree swamp Deciduous tree species (e.g., paper birch or aspen) dominate the upper story of the vegetation community. or just below the ground surface. Mixedwood treed swamp Deciduous and coniferous tree species (e.g., paper birch or aspen, and spruce) dominate the upper story of the vegetation community. Needle-leaf treed swamp Coniferous tree species (e.g., black and white spruce) dominate the upper story of the vegetation community. Shrubby swamp Shrub species (e.g., willows) dominate the upper story of the vegetation community. Marsh Mineral wetlands with shallow water levels that can fluctuate quickly. Wet meadow Marshes with temporary water levels (often dry by late spring). Permanency of water also varies. Seasonal marsh or seasonal emergent marsh Marshes with seasonal water levels (often dry by late summer). Emergent marsh Marshes with semi-permanent water levels (often present into the fall). Shallow Open Water Permanent in nature and can be associated with other wetland types. Shallow Artificial pond (non-wetland) Construction ponds, such as dugouts and stormwater retention facilities. open water wetlands typically are less than 2 m deep. Flood association (non-wetland) Ecosystems that possess wetland characteristics but do not meet the strict definition of a wetland. Sites typically do not meet the vegetation, hydrological and/or soil requirements to be considered wetlands. Open water pond Ponds with permanent water levels. Wetland Complex Features that are hydrologically connected (e.g., through drainage features) or Wetland complex Wetlands within complexes are typically connected by ground or surface waters, which increases the length of the water flow path. Long flow paths allow for longer retention times for sediment, nutrients exhibit more than one wetland type (e.g., swamp and marsh). and other contaminants to settle out from the water column, be attenuated by vegetation or be incorporated into any biogeochemical processes.

HYDROLOGY FISH AND FISH HABITAT See the Other Environmental Considerations band See the Hydrology (Wetlands and Watercourses) band Hydrological Feature Description Class Description Riparian Buffer Area Shallow groundwater Locations with increased potential to experience groundwater discharge into open excavations by intersecting the water table or Alberta Class B Watercourses classes designated by provincial fisheries biologists and 30 m Shallow groundwater; artesian conditions comprising the integrity of a shallow confining unit. Class C defined in the Codes of Practice 30 m (fish-bearing) Artesian conditions 10 m (non-fish-bearing) Unconfined aquifer NCD Non-Classified Drainage 10 m Partially confined aquifer British Columbia S1A (fish-bearing large rivers) Mean channel width > 100 m 50 m Unconfined to confined aquifer S1B (fish-bearing) Mean channel width > 20-100 m 50 m Potentially unconfined aquifer S2 (fish-bearing) Mean channel width > 5-20 m 30 m S3 (fish-bearing) Mean channel width 1.5-5 m 20 m S4 (fish-bearing) Mean channel width < 1.5 m 15 m CONTAMINATION RISK S5 (non-fish-bearing) Mean channel width > 3 m 10 m See the Other Environmental Considerations band S6 (non-fish-bearing) Mean channel width ≤ 3 m 10 m Contamination Risk Description NCD Non-Classified Drainage None Moderate Risk Contamination Identified as having a potential impact to the Project Footprint. High Risk Contamination Identified as a property with current and/or historical activities that have known contamination, or will likely have contamination, within the Project Footprint. Contamination Present Areas of high-risk contamination that have been sampled and confirmed within the Project Footprint

INDEX SHEET 11 of 12 TOPOGRAPHY CLASSES SOIL PHASES Included in the soils symbols on the Photomosaics Included in Soil Parent Material Band and the soils symbols on the Photomosaics Symbol % Slope Description Soil Phase EAS Label Description 1 0-0.5 Level Bouldery by Bouldery at the surface 2 > 0.5-2 Nearly level Disturbed di Previously disturbed by construction activities 3 > 2-5 Very gentle slopes Gleyed gl Imperfectly drained and exhibit mottling and gleying features in the subsoil 4 > 5-10 Gentle slopes Overlying gravel gv Gravelly at depth 5 > 10-15 Moderate slopes Peaty pt Gleysolic soils that have 20-50 cm of the surface peat 6 > 15-30 Strong slopes Saline sa Moderately saline and strongly sodic subsoils 7 > 30-45 Very strong slopes Saline lower subsoil sc Saline lower subsoils 8 > 45-70 Extreme slopes Shallow sh Non-conforming parent material within 1.0 m of the surface 9 > 70-100 Steep slopes Stony st Stonier than normal 10 > 100 Very steep slopes

SOIL PARENT MATERIAL See the Soil Parent Material band Parent Material EAS abbreviation (if Applicable) Description Weathered bedrock B Weathered bedrock is soft and can be excavated using standard excavation equipment. Colluvium C Colluvial deposits occur mostly on or at the base of steep slopes and consist of materials originating from nearby sources that have been re-deposited by the force of gravity. The deposits are usually loose, moderately to rapidly permeable and variable in depth to hard bedrock. Usual textures are gravelly sandy loam with a high proportion of stones and cobbles. They tend to be unstable and, in some areas, may still actively be accumulating. Topography is usually moderately to extremely sloping. Colluvial fan Cf Colluvial fan deposits occur in areas below steeply sloping valley walls where the material has spread out onto valley bottoms. The material is generally very coarse textured and reflects the lithology of the local bedrock or surficial materials from the adjacent uplands. The material is non- saline, non-sodic and usually non-calcareous. Eolian E Eolian deposits consist of material deposited by wind. The material is usually stone-free and silt loam to sand textured. Eolian deposits are sometimes underlain by morainal or other surficial deposits. Fluvial F Most fluvial deposits occur on level to gently undulating floodplains but also occur adjacent to some of the smaller creeks and rivers. Textures range from sandy to silty in the surface and usually grade to sand at depths of 0.5 m to 2 m. Most areas are affected by high groundwater tables and many areas are poorly drained. Periodic flooding during the winter months in the Fraser Valley is common on these deposits. Fluvial fan Ff Fluvial fan deposits usually occur where relatively swiftly flowing streams abruptly lose velocity and deposit the heavier part of their sediment load in a fan shaped pattern. Many are still in the process of formation. The deposits are usually moderately to excessively stony and are variable in texture, with coarse to moderately coarse textured being the most common. Topography varies from gently to steeply sloping in the direction of stream flow. Glaciofluvial GF Glaciofluvial deposits consist of material deposited by streams flowing within (eskers) and from the ice sheet. Glaciofluvial deposits vary from gravelly to loamy sand to sand textured. Glaciofluvial deposits occur on undulating to gently rolling upland terraces but occasionally may also occur on steeply sloping terrain. Glaciofluvial sands and gravels are non-saline, non-sodic and non-calcareous. Glaciolacustrine GL Glaciolacustrine deposits consist of material deposited from glacial meltwater into lakes. Glaciolacustrine clays and silts occur mainly on gently undulating to gently rolling landscapes. The glaciolacustrine clays and silts are non-saline and non-sodic. Glaciomarine GM Glaciomarine sediments consist of massive, compact, very slowly permeable silty to clayey sediments, which have not been preloaded by glacial ice as is the case with morainal deposits. The glaciomarine deposits, which were laid down in near-shore locations during glacial recession and subsequently exposed through isostatic rebound, contain variable amounts (usually minor) of stones, cobbles and gravel incorporated from floating ice. Topography varies from gently undulating to strongly sloping on the eolian veneer deposits that overlie morainal or glaciomarine materials. Lacustrine L Stone-free lake deposits range in texture from silt loam to silty clay and occur on relatively level topography. Lacustrine deposits consist of sediments deposited in lake environments during post-glacial time. Most areas of lacustrine deposits have shallow groundwater tables in the Fraser Valley. Organic O Organic deposits form when the rate of organic accumulation exceeds the rate of decomposition. The peat is derived from accumulations of reeds, sedges, grasses and moss, in various stages of decomposition. In some areas, a proportion of mineral material is mixed with the organic material, which was usually carried in and deposited during flooding by adjacent watercourses. Pitted deltaic PD Pitted deltaic deposits consist of water-worked morainal material that is comprised mainly of bedded fine sand and silt. These deposits occur in the Stony Plain and Carvel area, west of Edmonton. Pitted deltaic deposits vary in texture from fine sandy loam to silty clay loam and occur on gently undulating to strongly rolling landscapes. The deposits are non-saline and non-sodic but occasionally may be weakly calcareous to the surface. (The pits were created by the ablating blocks of ice in the delta that formed and created Glacial Lake Edmonton.) Hard consolidated R Assemblage of hard minerals bound together or sometimes a mass of a single mineral. bedrock or Hard rock Till T Till (morainal) deposits are heterogeneous material deposited directly by glacial ice. Till is usually slightly to very stony. Some of the till deposits may be gravelly in texture and sometimes hard consolidated bedrock or soft weathered bedrock occurs within a metre of the surface. The till is non- saline and non-sodic but can be moderately calcareous within 50 cm of the surface. Till deposits occur on undulating to extremely sloping terrain. Not Applicable N/A Soil parent material not discernible or not present. Such as in areas of disturbed land. Soils surveys may not have been completed on these lands.

INDEX SHEET 12 of 12 CER Order No.: OPL-004-2020

121°0'0"W

ENVIRONMENTAL ALIGNMENT 1 SHEETS OVERVIEW ¯ SPREAD 5B !. TRANS MOUNTAIN EXPANSION PROJECT KP 990.3

Coquihalla Summit Recreation Area 10 !. Kilometre Post (KP) !. Yale Garry Oak KP 1000 !. Pump Station Ecological Reserve

Harrison Lake Trans Mountain Expansion Project

ST5 Highway

Emory Creek Railway 49°30'0"N Provincial Park 20 Watercourse

Environmental Alignment Sheet

!. 49°30'0"N KP 1020 City / Town Coquihalla River Provincial Park Indian Reserve

Park / Protected Area

Waterbody 30

T7 S Projection: NAD 1983 UTM Zone 10N. !. Pipeline SSEID005.21 KPs & Footprint provided by UPI March 12, ST5 2019; Facilities: provided by KMC 2012; Transportation: NRCan Sasquatch Hope !. 2015; Geopolitical Boundaries: NRCan 2003, ESRI 2005; First Nation KP 1040 Lands: Government of Canada 2018; Parks and Protected Areas:BC Provincial HOPE Coquihalla Canyon MFLNRO 2008, NRCan 2017; Hydrology: NRCan 2009; Hillshade: PRESSURE CONTROL TERA Environmental Consultants 2008. Park STATION Provincial Park Nicolum River

Provincial Park This document is provided by Trans Mountain Corporation (TMC) for use by 40 the intended recipient only. This information is confidential and proprietary to TMC and is not to be provided to any other recipient without the written F.H. Barber consent of TMC. It is not to be used for legal, engineering or surveying purposes, nor for doing any work on or around TMC's pipelines and facilities, Provincial Park 50 all of which require TMC's prior written approval. Although there is no reason to believe that there are any errors associated Silver Lake with the data used to generate this product or in the product itself, users of Harrison !. these data are advised that errors in the data may be present. Hot Springs KP 1060 Provincial Park BRITISH COLUMBIA ALBERTA

Dawson Creek Grande Prairie !(2 !(97 Kent !(43 Prince George Edmonton !(16 Hinton T3 Edson S Quesnel Red Valemount Jasper Deer Blue River 9 60 E.C. Manning Williams !(2 ST Lake !(97 Calgary Fraser River Provincial Park Darfield !(1 Kamloops !(2 Ferry Island Kelowna Vancouver !(3 Provincial Park 61 (Burnaby) Hope Chilliwack !. USA KP 1075.1 MAP NUMBER PAGE Bridal Veil Falls 201904_MAP_CH2M_EAS_01131_REV0_S5B_OVERVIEW SHEET 1 OF 1 DATE REFERENCE REVISION Provincial Park Skagit Valley June 2020 CE733700 1 Provincial Park SCALE PAGE SIZE DISCIPLINE ST1 1:225,000 11x17 EAS DRAWN CHECKED DESIGN Chilliwack Lake Skagit River Cottonwoods SB CMR CMR Provincial Park Ecological Reserve km 0 5 10 121°0'0"W ALL LOCATIONS APPROXIMATE 201904_MAP_CH2M_EAS_01131_Rev0_S5B_Overview.mxd \\jacobs.com\common\Shares\CNR\GIS-TMEP\MAP_FILES\EAS\201904_MAP_CH2M_EAS_01131\Rev1\Spread_5b\Output\20200312\01-13283-M002-PE0150035.mxd ENVIRONMENTAL PROTECTION 11" X 17" MOSAIC SCALE 1:5,000 ENVIRONMENTAL AND SOCIO-ECONOMIC WILDLIFE/RARE PLANT CONCERN CONTAMINATIONRISK MEASURES PROTECTION ENVIRONMENTALOTHER RECLAMATION UNIT - SEED MIX RIPARIANHABITAT FEATURESTERRESTRIAL AND WETLAND (PIPELINE : VEHICLE) WATERCOURSE CROSSING RECOMMENDATIONS SOILCONSIDERATIONSOTHER SOIL EROSION HANDLING SOIL WORK WINDOW RECOMMENDED CONSTRUCTION TRENCH STABILITYTRENCH CONSIDERATIONS SOCIO-ECONOMIC IMAGERY: BING IMAGERY. SETTING INFORMATION LAND USE LAND SOIL PARENT MATERIAL CONSIDERATIONS ENVIRONMENTALOTHER CONSIDERATIONS SOCIO-ECONOMIC FEATURESTERRESTRIAL RIPARIANHABITAT WATERCOURSES) (WETLANDS AND HYDROLOGY LINE LIST (PARCEL IDS) OWNERSHIP LAND JURISDICTION PROXIMITY PROXIMITY TO TMPL (m) 1 ControlLocation Candidate Access ParkArea Protected / Old Management Growth Old Management Growth IndianReserve Trail / Road Resource Road Paved Highway ExistingPipeline Feature WildlifeHabitat Wetland RarePlant ArtificialPond WatercourseDelineation SoilBreak WatercourseCrossing WaterField Verified Well, WaterWell SoilSample SoilInspection RarePlant Facility Mountain Trans Easement TMPLPipeline Existing AccessProposed Centreline Kilometre(KP) Post Area,Non-legal Area,Legal PROCEDURE STRIPPING DEPTH (CM) byKKL1(10) Soils Description 6 Class Topographic Topsoil (cm) Depthof SoilUnit SoilPhase

01-13283-M002-PE0150036 3053733 proprietary to TMC and is not to be provided to any other recipient without the written consent of TMC. It is not to be used for legal, engineering legal, for used be to not It is TMC. of consent written the without recipient other any to provided be to isnot and TMC to proprietary This document is provided by Trans Mountain Corporation (TMC) for use by the intended recipient only. This information is confidential and is confidential information only. This recipient intended the by for use (TMC) Corporation Trans Mountain by isprovided document This or surveying purposes, nor for doing any work on or around TMC's pipelines and facilities, all of which require TMC's prior written approval. written prior TMC's require which of all and facilities, pipelines TMC's around or on work any doing for nor purposes, surveying or Riparian HabitatRiparian 3053938 <5 Wetland Watercourse 3053741 3053750 PRIV ATE DI ST RI CT OF HOPE Contamination Risk Contamination 3053768 5-10 D I S T URB E D L A N D ContaminationPresent Moderate High SSH N/A 16490177 0 <5 16490193 5-10 16490215 Wildlife/Rare Plant Wildlife/RarePlant Concern RA PRIV ATE 17699835 WildlifeRare Plant + RarePlant Wildlife MUNI C I P A L P A R K S – K E T T L E VA L L E Y R A I L WA Y C ON S E R VA T I ON L A N D S T L RU S I T E - NOT I F Y I NDI GE NOUS MONI T OR A ND E I [T L U- N OT E 1 ] 3056741 RA 3056759 P L ANT GA T HE RI NG SI T E ( T L U- 4 0 ) 14085232 aiiispoie yTCDcme ,21;WtroreCosns eMrn Environmental GeoMarine Crossings: Watercourse 2016; 2, December by TMC Facilities provided od rvddb P eebr1,21;TP ot eiin0poie yTCMay 2012; by TMC provided 0 Revision Route TMPL 2019; 19, December byUPI Roads provided Projection: KMC Projection: H n.21;Tasotto:NCn21,B FNO21;OdGot aaeetAreas: Management Growth Old 2012; MFLNRO BC 2015, NRCan Transportation: 2019; Inc. IHS FNO20;Iaey 0521,poie yTC evc ae rdt:©22 Microsoft 2020 © Credits: Layer Service by TMC; provided 2015-2017, Imagery: 2008; MFLNRO oslat uy1,21;WtrWlspoie yTCAgs ,21;Eitn Infrastructure: Existing 2017; 8, August by TMC provided Wells Water 2019; Consultants July 15, yrlg:B LR 01 Ra 0721;PrsadPoetdAes Ra 07 BC 2017, NRCan Areas: Protected Parksand 2007-2011; NRCan 2011, FLNRO BC Hydrology: PipelineSSEID005.24 Spread5B,KPs & Easement provided by UPI January 16, 2020; Access CMLR 00 is ainLns oeneto aaa21,ProgressLands 2017; 2018, Canada of Government Lands: Nation First 2020; MFLNRO BC oprto 00Dgtllb CE 22)Dsrbto Airbus DS. Distribution (2020) ©CNES DigitalGlobe 2020 © Corporation RA <5 14085232 RA P OT E NT I A L L Y A CI D GE NE RA T I NG ROCK [GE O- NOT E 1 ] 10363769 R E CL A MAT I ON UNI T 6 . 2 - HOP E [RC- NOT E 3 ] MOD E R A T E ML/ A R D P O T E N T I A L N O T S URVE Y E D [S O - N O T E 4 ] 10363548 S E E HCA A P P ROVA L [A K - NOT E 1 ] FW HERI T AGE SI TE ( DI RI - 6 6 ) DI ST RI CT OF HOPE NO. 5-10 10363068 1 0 GENERATION DATE GENERATION June 19, 2020 SSEID005.24 - Spread 5b March 12, 2020 <5 5-10 MUNI C I P A L P A R K S – K A WK A WA L A K E P A R K 10364064 CER OrderNo.:OPL-004-2020 PRIV ATE 10364099 TREED 15-20 NS DESCRIPTION 10364226 P : I S OL A T I ON , V: RA MP A ND C UL VERT [A Q- NOT E 2 ] CWD [RC- NOT E 1 , 2 ] [S6 ] CHANNE L ( BC- 6 5 3 C) - NF B SSH DA CMR AQ - OPEN BY CHKD. A BTS AB TS B 4019326 APPR. <5 DRAWN MAP NUMBER MAP SCALE DATE 01-13283-M002-PE0150035 June 2020 1:5000 CMR DI ST RI CT OF HOPE 29283124 REFERENCE PAGE SIZE PAGE CHECKED E ARL Y DRAF T CRI T I CA L HAB I T A T - B ROT ROE ( VG- 1 8 2 ) FW CE771600 E ARL Y DRAF T CRI T I CA L HAB I T A T [VG- NOT E 2 ] 11x17 AB REVISION DISCIPLINE PAGE DESIGN 10364285 BC-035 CMR EAS 1

01-13283-M002-PE0150034 FROM TRANS MOUNTAIN EXPANSION PROJECT 0 ENVIRONMENTALSHEET ALIGNMENT KP 1038.7 KP 50 CER OrderNo.:OPL-004-2020 9 68 .1 5 03 8 8. TO1 03 47 1 9. 181 TO 03 28 0.FEATURES: ADDITIONAL 9. 1 1 039 TO 5 09 . 1 040 TO3 2 . 1 040 6 8 . 6 8 B I RD NE S T I NG WI NDOW ( ZONE A 1 ) T I MI NG ( S T Ó: LCONF Ö- 7 5 I )CONF NED [S T I Ó: AQUI NED L Ö- F N OT ER AQUI E ( F 1 ER HY ] - ( 9 7 HY ) - 9 [HY 6 ) - NOT [HY E - NOT 1 ] E 1 ] WI NDOW WHE RE S UI T A B L E NE S T I NG HA B I T A T P RESENT - RSMT T ABL E 4 . 2 - 2 A 100 TO • MI G R A T O R Y • S T Ó: L • Ö PARTI S I T • E PARTI AL L Y AL L Y 150 KP 1040.2 KP 200 250 m \\jacobs.com\common\Shares\CNR\GIS-TMEP\MAP_FILES\EAS\201904_MAP_CH2M_EAS_01131\Rev1\Spread_5b\Output\20200312\01-13283-M002-PE0150036.mxd ENVIRONMENTAL PROTECTION 11" X 17" MOSAIC SCALE 1:5,000 ENVIRONMENTAL AND SOCIO-ECONOMIC WILDLIFE/RARE PLANT CONCERN CONTAMINATIONRISK MEASURES PROTECTION ENVIRONMENTALOTHER RECLAMATION UNIT - SEED MIX RIPARIANHABITAT FEATURESTERRESTRIAL AND WETLAND (PIPELINE : VEHICLE) WATERCOURSE CROSSING RECOMMENDATIONS SOILCONSIDERATIONSOTHER SOIL EROSION HANDLING SOIL WORK WINDOW RECOMMENDED CONSTRUCTION TRENCH STABILITYTRENCH CONSIDERATIONS SOCIO-ECONOMIC IMAGERY: BING IMAGERY. SETTING INFORMATION LAND USE LAND SOIL PARENT MATERIAL CONSIDERATIONS ENVIRONMENTALOTHER CONSIDERATIONS SOCIO-ECONOMIC FEATURESTERRESTRIAL RIPARIANHABITAT WATERCOURSES) (WETLANDS AND HYDROLOGY LINE LIST (PARCEL IDS) OWNERSHIP LAND JURISDICTION PROXIMITY PROXIMITY TO TMPL (m) 1 ControlLocation Candidate Access ParkArea Protected / Old Management Growth Old Management Growth IndianReserve Trail / Road Resource Road Paved Highway ExistingPipeline Feature WildlifeHabitat Wetland RarePlant ArtificialPond WatercourseDelineation SoilBreak WatercourseCrossing WaterField Verified Well, WaterWell SoilSample SoilInspection RarePlant Facility Mountain Trans Easement TMPLPipeline Existing AccessProposed Centreline Kilometre(KP) Post Area,Non-legal Area,Legal PROCEDURE STRIPPING DEPTH (CM) byKKL1(10) Soils Description 6 Class Topographic Topsoil (cm) Depthof SoilUnit SoilPhase proprietary to TMC and is not to be provided to any other recipient without the written consent of TMC. It is not to be used for legal, engineering legal, for used be to not It is TMC. of consent written the without recipient other any to provided be to isnot and TMC to proprietary This document is provided by Trans Mountain Corporation (TMC) for use by the intended recipient only. This information is confidential and is confidential information only. This recipient intended the by for use (TMC) Corporation Trans Mountain by isprovided document This or surveying purposes, nor for doing any work on or around TMC's pipelines and facilities, all of which require TMC's prior written approval. written prior TMC's require which of all and facilities, pipelines TMC's around or on work any doing for nor purposes, surveying or Riparian HabitatRiparian ST :L Ó Ö SIT E [ST :L Ó -NOT Ö E 1] ST :L Ó Ö SIT E [ST :L Ó -NOT Ö E 1] ST :L Ó Ö SIT E (ST :L Ó -1614) Ö ST :L Ó Ö SIT E (ST :L Ó -X Ö 2) Wetland Watercourse

01-13283-M002-PE0150037 ST :L Ó Ö SIT E [ST :L Ó -NOT Ö E 1] REEDT ST :L Ó Ö SIT E (ST :L Ó -509) Ö C / R WI N D / WA TE R [S O- N OTE 1 , 6 ] 15-20 RET RA RA N N/A CHL ESS 0 D I S TURB E D LA N D UNS TA B LE TR E N C H [S O - N O TE 3 ] 8753881CROWN 10-15 FW Contamination Risk Contamination 15-20 ContaminationPresent Moderate High F REEDT WI N D [S O - N O TE 1 ] H O P E P R E S S URE C O N TRO L S TA TI O N - S E E F A C I LI TY E P P Wildlife/Rare Plant Wildlife/RarePlant Concern 5-10 D I S TURB E D LA N D WildlifeRare Plant + RarePlant Wildlife SSH N/A 0 10152300 PRIVAT E aiiispoie yTCDcme ,21;WtroreCosns eMrn Environmental GeoMarine Crossings: Watercourse 2016; 2, December by TMC Facilities provided od rvddb P eebr1,21;TP ot eiin0poie yTCMay 2012; by TMC provided 0 Revision Route TMPL 2019; 19, December byUPI Roads provided Projection: KMC Projection: H n.21;Tasotto:NCn21,B FNO21;OdGot aaeetAreas: Management Growth Old 2012; MFLNRO BC 2015, NRCan Transportation: 2019; Inc. IHS FNO20;Iaey 0521,poie yTC evc ae rdt:©22 Microsoft 2020 © Credits: Layer Service by TMC; provided 2015-2017, Imagery: 2008; MFLNRO oslat uy1,21;WtrWlspoie yTCAgs ,21;Eitn Infrastructure: Existing 2017; 8, August by TMC provided Wells Water 2019; Consultants July 15, yrlg:B LR 01 Ra 0721;PrsadPoetdAes Ra 07 BC 2017, NRCan Areas: Protected Parksand 2007-2011; NRCan 2011, FLNRO BC Hydrology: PipelineSSEID005.24 Spread5B,KPs & Easement provided by UPI January 16, 2020; Access CMLR 00 is ainLns oeneto aaa21,ProgressLands 2017; 2018, Canada of Government Lands: Nation First 2020; MFLNRO BC 10-15 oprto 00Dgtllb CE 22)Dsrbto Airbus DS. Distribution (2020) ©CNES DigitalGlobe 2020 © Corporation 10-15 UNS TA B LE TR E N C H [S O - N O TE 3 ] WI N D [S O - N O TE 1 ] 5-10 WSSH FW <5 5-10 P O TE N TI A LLY A C I D G E N E R A TI N G R O C K [G E O - N O TE 1 ] SOIL F 10-15

R E C LA MA TI O N UNI T 6 . 2 - H O P E [R C - N O TE 3 ] C O N TA I N ME N T A R E A [V G - N O TE 4 ] 4757611 WI N D / WA TE R [S O- N OTE 1 , 6 ] M O D E R A TE M L/ A R D P O TE N TI A L REEDT D I S TRI C T O F H O P E RA A Q – S E E DR A WI NG M0 0 2 - XW0 3 2 5 5 FW 4847431 H I GH WE E D D E N S I TY ( OG) Ff-C P : OP E N CUT; WQM, V : B OTH B A NK S [A Q- NOTE 1 , 3 ] [S 1 B ] COQUI HA LLA RI V E R ( B C- 6 5 4 ) - F I S H/ NA V 10678727 S I TE - S P E C I F I C WA TE R C OURS E D R A WI N G RA PRIVAT E NO. 1 0 A Q - R S MT TA B LE 7 . 1 - 2 NS GENERATION DATE GENERATION WAT ER June 19, 2020 SSEID005.24 - Spread 5b March 12, 2020 ST :L Ó Ö SIT E [ST :L Ó -NOT Ö E 1] C WD [R C - N OTE 1 , 2 ] ST :L Ó Ö SIT E (ST :L Ó -1614) Ö CROWN E V A TE LUA WA TE R C O N TR O L N E E D S [H Y- N O TE 1 ] RIVER SOIL CONT AINMENT AREA [VG-NOT E 4] N/A 1502883 SSH A R TE S I A N C ON D I TI ON S ( H Y- 9 8 ) CER OrderNo.:OPL-004-2020 REEDT 30154553 15-20 10-15 1502883 DESCRIPTION H I G H WE E D D E N S I TY ( TC ) 30154561 5-10 FW N O T S URV E YE D [S O - N O TE 4 ] 30154570 D I S TURB E D LA N D DA CMR BY 24953679 CHKD. BTS AB A NS TS B PRIVAT E S WSHF SSH FW SSH FW SSH APPR. 24953661 DRAWN MAP NUMBER MAP SCALE DATE 24953652 01-13283-M002-PE0150036 June 2020 1:5000 <5 CMR 24953709 REFERENCE PAGE SIZE PAGE CHECKED REEDT 10190767 CE771600 11x17 AB D I S TURB E D LA N D 5-10 3053733 <5 N/A REVISION DISCIPLINE PAGE DESIGN 0 BC-036 CMR EAS 1 01-13283-M002-PE0150035 FROM TRANS MOUNTAIN EXPANSION PROJECT 0 ENVIRONMENTALSHEET ALIGNMENT KP 1040.2 KP 50 CER OrderNo.:OPL-004-2020 1 0 4 0 . 7 8 9 TO 6 8 1 . 01 5 7 0 8 5 3 . 9 TO 9 .1 2 0 1 2FEATURES: 3 8 1ADDITIONAL 9 8 . 0 TO . 0 1 9 1 0 5 4 TO 0 . 1 0 6 4 8 0 . 6 8 B I RD NE S TI NG WI NDOW ( ZONE A 1 ) TI MI NG B E A R P O P TI ULA O N UNI C T ON ( F N I O RC N TH ON E D F C A I S A N C QUI E A D D F E E S R A ) QUI ( F E H R Y- 9 7 ( ) H Y- 9 [H 6 Y- ) N OTE [H 1 Y- ] N OTE 1 ] WI N D O W WH E R E S UI TA B LE N E S TI N G H A B I TA T WI[WF N D - OW: N OTE R 3 S , MT TA B 5 LE ] 4 - . 4 - R E 1 C OMME N D E D TI MI N G P R E S E N T - R S MT TA B LE 4 . 2 - 2 A 100 TO • MI G R A TOR Y • GRIZ Y L Z • P A R • TI A P LLY A R TI A LLY 150 KP 1041.7 KP 200 250 m