REPORT. Region of Peel. East Brampton Trunk Sewer Twinning Environmental Assessment. Project File Report

Transcription

1 REPORT Region of Peel East Brampton Trunk Sewer Twinning Environmental Assessment Project File Report June 2014

2 CONFIDENTIALITY AND COPYRIGHT This document is for the sole use of the addressee and Associated Engineering (Ont.) Ltd. The document contains proprietary and confidential information that shall not be reproduced in any manner or disclosed to or discussed with any other parties without the express written permission of Associated Engineering (Ont.) Ltd. Information in this document is to be considered the intellectual property of Associated Engineering (Ont.) Ltd. in accordance with Canadian copyright law. This report was prepared by Associated Engineering (Ont.) Ltd. for the account of Region of Peel. The material in it reflects Associated Engineering (Ont.) Ltd. s best judgement, in the light of the information available to it, at the time of preparation. Any use which a third party makes of this report, or any reliance on or decisions to be made based on it, are the responsibility of such third parties. Associated Engineering (Ont.) Ltd. accepts no responsibility for damages, if any, suffered by any third party as a result of decisions made or actions based on this report.

3 REPORT Executive Summary The Region of Peel has retained Associated Engineering (AE) to provide engineering services for the preliminary and detailed design of the trunk sanitary sewer twinning starting at the intersection of Queen Street East and Goreway Road (upstream end) to south of the intersection of Highway 407 East and Steeles Avenue East (downstream end), in east Brampton. Figure 1 East Brampton Sanitary Sewer System shows the details of the sewer alignment and contributing flows. The existing trunk sewer consists of approximately 5.6km of 1,200mm, 1,350mm, and 1,650mm diameter sewers constructed within existing right-of-ways and permanent easements. The upstream end of this project intersects the North Goreway Leg that services Northeast Brampton by gravity sewer and the Highway 50/Coleraine Leg of the system that services the Bolton area. The Highway 50/Coleraine Leg is a gravity system to the McVein Pump Station (PS) where the wastewater is then pumped by forcemain to the trunk sewer system. The downstream end of the project will connect to the existing twin trunk sewer system on the south side of Highway 407. The Region of Peel Water and Wastewater Master Plan has highlighted the need to twin the existing trunk sewer due to capacity deficiency for servicing the existing and future Town of Caledon and Brampton East development. Furthermore, it does not have redundancy to allow for the re-routing of flows in the event of an emergency (such as structural failure) or for routine maintenance purposes. In addition to capacity deficiencies, there are odour and corrosion problems with the existing trunk sewer system that will be considered when designing the new trunk sewer twinning. The following report analyzes nine (9) alternative routes for the East Brampton Trunk Sewer Twinning. The analysis includes impacts on the natural environment, cultural and heritage impacts, archaeological impacts and technical feasibility of each alignment to determine the preferred alignment for the twin trunk sewer. Figure 2 - Alternative Route Alignment provides an overview of the nine (9) alignments reviewed as part of this Schedule B Municipal Class Environmental Assessment. After evaluating each of the alternative alignments under the before mentioned criteria it was determined that Alignment No.1D is the preferred option. Alignment No.1D has no foreseen impacts on the environment, no impact on areas of archaeological interest, no adverse socio-economic impacts and is technically preferable. The other alternatives alignments had significant environmental impacts, greater social-economic impacts and carried a greater construction risk due to the close proximity to existing buildings and structures. iii

4 Region of Peel Figure 1 - East Brampton Sanitary Sewer System iv

5 REPORT Figure 2 - Alternative Route Alignments v

6 Region of Peel Table of Contents SECTION PAGE NO. Executive Summary iii Table of Contents vi List of Tables viii List of Figures ix 1 Introduction Overview Objectives of Study Study Area Study Process The Class Environmental Assessment process Project File Report Study Schedule Study Organization Public and Agency Consultation Problem Identification Introduction Problem Identification Review of Background and Technical Information Introduction Existing Field Conditions Existing Utilities Geotechnical and Hydrogeological Investigations Natural Environment Social Economic Review Introduction Natural Environment Social-Economic Review Archaelogical Assessment Natural Heritage Assessment Permits and Approvals Review of Alternatives 6-17 vi \\s-tor-fs-01\projects\ \00_east_brampton\engineering\04.00_preliminary_design\ea folder\project file\east brampton project file_may 2014.docx

7 Table of Contents 6.1 Introduction Alternative Alignments Screening of Alternative Alignments Evaluation Criteria Preferred Alternative Alignment No.1D Description Potential Impacts and Recommended Mitigation Measures Air Quality Assessment Odour Mitigation Measures Noise/Odour Complaints Protocol Noise/Dust Infrastructure Ontario Lands Identify and Describe Undertakings Identify Undertaking in Category Listing Matrix Environmental Assessment Screening Questions Conclusion Property Requirements Next Steps Appendix A Agency and Stakeholder Contact List 10-A Appendix B Received Stakeholder Comments 10-B Appendix C Stakeholder/Agency Meeting Minutes 10-C Appendix D Public Information Centre 10-D Appendix E Alternative Alignment Profiles 10-E Appendix F Environmental Assessment Report 10-F Appendix G Socio Economic Report 10-G Appendix H Archaeological Assessment 10-H Appendix I Natural Heritage Assessment 10-I Appendix J Adesa Toronto Alternative Alignment Analysis 10-J Appendix K Ministry of the Environment Meeting Minute 10-K Appendix L Preliminary Property Acquisition Letters and Plan 10-L vii

8 Region of Peel List of Tables PAGE NO. Table 1 - Types of Schedules 2-6 Table 2 - Schedule and Dates 2-7 Table 3 - Project Team 2-8 Table 4 - Evaluation Criteria for Selection of Preferred Alignment 6-25 Table 5 - Evaluation of Criteria 6-27 Table 6 - Mitigation Measures 7-35 viii \\s-tor-fs-01\projects\ \00_east_brampton\engineering\04.00_preliminary_design\ea folder\project file\east brampton project file_may 2014.docx

9 List of Figures List of Figures PAGE NO. Figure 1 - East Brampton Sanitary Sewer System Figure 2 - Alternative Route Alignments iv v Figure 3 East Brampton Sanitary Sewer System 1-2 Figure 4 Study Area 1-4 Figure 5 Existing Sewer Alignment 6-21 Figure 6 - Alternative Route Alignments 6-23 Figure 7 - Preferred Alignment 1D 7-2 ix

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11 REPORT 1 Introduction 1.1 OVERVIEW The Region of Peel has retained Associated Engineering (AE) to provide engineering services for the Schedule B Municipal Class Environmental Assessment study (Class EA study), preliminary and detailed design, tender support, administration and on-site construction supervision, and post-construction services for the twinning of a new trunk sewer. The new trunk sewer will connect into a new manhole on the north side of Queen Street on Goreway Drive on the upstream end. The twin trunk sewer will connect into an existing chamber to the south of intersection of Highway 407 East and Steeles Avenue East on the downstream end. The existing trunk sewer consists of approximately 5.6km of 1,200mm, 1,350mm, and 1,650mm diameter sewers constructed within existing right-of-ways and permanent easements. The upstream end of this project intersects the North Goreway Leg that services Northeast Brampton by gravity sewer and the Highway 50 / Coleraine Leg of the system that services the Bolton area. The Highway 50 / Coleraine Leg is a gravity system to the McVean Pump Station (PS) where the wastewater is then pumped by forcemain to the trunk sewer system. Refer to Figure 1 - East Brampton Sanitary Sewer on page 1-2 for further details. The downstream end of the project will connect to the existing twin trunk sewer system on the south side of Highway OBJECTIVES OF STUDY The Project File Report (PFR) documents the planning and design process followed in accordance with the procedures set out under the Municipal Class Environmental Assessment process (MEA October 2000, as amended in 2007) for Schedule B projects. The objectives of the Class EA study included the following: Documentation of the existing conditions within the study area corridor to provide a basis on which to proceed with the assessment of needed improvements to address existing deficiencies from a physical and operational perspective Engagement of a broad range of stakeholders and the general public in the study process to allow for the sharing of ideas and input towards the development of the preferred design Development and documentation of a preferred design solution that addresses the deficiencies within the study area corridor The Region of Peel retained Associated Engineering to assist the Region with the Class Environmental Assessment and Preliminary and Detailed Design for the twinning of the existing trunk sanitary sewer. 1-1

12 Region of Peel Figure 3 East Brampton Sanitary Sewer System 1-2

13 1 - Introduction 1.3 STUDY AREA The Class EA study area for the twinning of the trunk sanitary sewer is shown in Figure 4 Study Area. The land uses within the study area consist primarily of industrial and commercial operations focused on manufacturing, shipping, and retail plazas. In fact, there are only three residentially zoned properties in the entire area. Starting from a ±100m buffer distance from proposed work, which is common for socio-economic assessment of potential impacts, the boundary has been expanded to ±200m in order to be inclusive. It includes properties that directly abut potential haul routes on the west side of Airport Road and the east side of Goreway Drive. A detailed rationale of the study area is as follows: Airport Road has been included as it is a major access route and it is important to take traffic impacts into account that may be experienced as a result of construction activities. Properties abutting Airport Road on the southwest side of the study area have been included due to potential traffic impacts. The study area follows Woodslea Road and Walker Drive, from Airport Road to Torbram Road, in order to include lands within a ±200m distance from the existing trunk sewer route in which properties may experience socio-economic impacts. The boundary follows Torbram Road southeast, maintaining a ±200m distance from the existing trunk sewer and proposed shaft site. The study area includes lands ±200m southeast of Steeles Avenue in order to capture a potential alignment, as well as properties and traffic impacts that have the potential to be affected by the construction. Goreway Drive has been included in order to account for potential traffic impacts. The study area contains properties to the north-east of Goreway Drive in order to be inclusive of potentially affected properties. A ±200m buffer has been included around the northern reach of the area in order to include properties that may experience socio-economic impacts. The northwestern boundary is located ±200m away from Queen Street East in order to account for a potential alignment that would run parallel to Queen Street East between Goreway Drive and the existing trunk sewer. 1-3

14 Region of Peel Figure 4 Study Area 2 Study Process 2.1 THE CLASS ENVIRONMENTAL ASSESSMENT PROCESS The Municipal Class EA process provides a decision-making framework that enables the requirements of the EA Act to be met in an effective and traceable manner. An approved Class EA document describes the process that a proponent must follow for a class or group of undertakings in order to meet the requirements of the EA Act. Once approved, the Class EA establishes the process whereby the municipal projects, as defined in the Municipal Class EA and any subsequent modifications, can be planned, designed, constructed, operated, maintained, rehabilitated and retired without having to obtain project-specific approval under the EA Act, provided the approved environmental planning process is followed. 2-4

15 2 - Study Process The term Environment is applied in a broad sense and includes the natural, social, cultural, built and economic environments. The key principles of environmental assessment planning include: Consultation with affected parties early into and throughout the process, such that the planning process is cooperative in nature Consideration of a reasonable range of alternatives for implementing the solution Identification and consideration of the effects of each alternative on affected aspects of the environment Systematic evaluation of alternatives in terms of their advantages and disadvantages, to determine their net environmental effects; and Provision of clear and complete documentation of the planning process followed, to allow traceability of decision-making with respect to the project. Currently, the Municipal Class EA facilitates municipal road, water and wastewater, and transit projects through the Class EA Planning and Design Process. In order to address the variability of environmental impacts for specific projects, the Municipal Class EA classifies individual projects in terms of schedules as shown in Table 2. The Class EA Planning and Design Process is a five-phase planning process approved under the EA Act by which proponents may plan municipal infrastructure projects. The process follows the five basic phases which are conducted within a framework of environment protection, effective consultation with stakeholders including review agencies, the public, property owners, interest groups, and traceable decision making. The five phases of the Class EA planning and design process are summarized as follows: Phase 1 Identify the problem (deficiency) or opportunity Phase 2 Identify alternative solutions to address the problem or opportunity by taking into consideration the existing environment, and establish the preferred solution taking into account public and review agency input Phase 3 Examine alternative methods of implementing the preferred solution, based on the existing environment, public and review agency input, anticipated environmental impacts and methods of minimizing negative effects and maximum positive benefits Phase 4 Document, in a Project File Report or Environmental Study Report, a summary of the rationale and the planning, design and consultation process of the project established through Phases 1 to 3. Either report is made available for public and agency review and comment. Phase 5 Complete contract drawings and documents and proceed to construction and operation along with the monitoring of construction activities and operations to ensure adherence to environmental provisions and mitigation. 2-5

16 Region of Peel Table 1 - Types of Schedules Class EA Schedule Designation A Schedule Description Projects are limited in scale, have minimal adverse environmental impacts and include a number of municipal maintenance and operational activities. The projects are pre-approved and may proceed to implementation without following the full class EA planning process A+ Projects are pre-approved; however, the public is to be advised prior to project implementation B C Projects have the potential for some adverse environmental effects. These projects require mandatory contact with directly affected public and relevant agencies, to ensure that they are aware of the project and that their concerns are addressed. A Project File Report is prepared and filed for review by the public and review agencies. Projects have the potential for significant environmental effects and must proceed under the full planning and documentation procedures specified in the Class EA document. An Environmental Study Report (ESR) is prepared and filed for review by the public and review agencies. Typical Projects Normal emergency and operational and maintenance activities Normal emergency and operational and maintenance activities Improvements and minor expansions to existing facilities Construction of new facilities and major expansions to existing facilities Based on the Region s assessment of the type of improvements that might be required, the study has been identified by the Region as a Schedule B undertaking under the Municipal Class Environmental Assessment. 2.2 PROJECT FILE REPORT The Project File Report documents the planning and design process followed to determine the recommended undertaking and environmentally significant aspects for the East Brampton Trunk Sanitary Sewer, in accordance with the procedures for Schedule B projects, setting out the planning and decision making process, including consultation with stakeholders, technical agencies and the public, which has been followed to arrive at the preferred solution. The Project File Report also sets out the mitigating measures proposed to avoid or minimize environmental impacts. 2-6

17 2 - Study Process The Project File Report embodies Phase 4 of the Environmental Assessment process, documenting in a report all the activities undertaken to date through Phases 1, 2, and 3. The report is intended to be a traceable and easily understood record of the proponent s decision making process. The ESR generally describes the following: A description of the problem or opportunity and other background information The rationale employed in selecting the preferred solution to the problem The rationale employed in selecting the preferred design A description of the environmental considerations and impacts The mitigating measures which will be undertaken to minimize environmental impacts A description of the consultation process and an explanation of how concerns raised by the public and review agencies have been addressed in developing the project A description of any proposed monitoring program that will be carried out during construction 2.3 STUDY SCHEDULE The study was initiated in May 2013 through the advertised Notice of Study Commencement. The study scope, as defined by the Region s Terms of Reference, followed the requirements as set out in the Municipal Class Environmental Assessment process including the following timetable shown in Table 2-3. Table 2 - Schedule and Dates Schedule Item Date Notice of Study Commencement June 6, 2013 Public Information Centre November 26, 2013 Completion of Project File April STUDY ORGANIZATION The Region of Peel retained Associated Engineering to assist the Region with the Class Environmental Assessment study. The project team consisted of members of the Region of Peel, Associated Engineering and specialized sub-consultants needed to address specific requirements for projects of this type under the Ontario Environmental Assessment Act. 2-7

18 Region of Peel The Project Team consisted of the following staff shown in table below: Table 3 - Project Team Role Proponent Prime Consultant Sub-Consultants Organization and Team Member Region of Peel Public Works Olena Gordiyenko, P. Eng. Client Project Manager Associated Engineering Mark Belanger, C.E.T, P. Eng. Project Manager Archaeological Services Inc. Robert H.Pihl, M.A. Manager, Environmental Assessment Division Niblett Environmental Associates Inc. Chris Ellingwood Project Manager Hardy Stevenson and Associates Limited Dave Hardy, B.A., M.E.S., R.P.P., M.C.I.P. Project Lead SPL Consultants Limited Scott Peaker, P.Eng. Project Manager Mackay Mackay & Peters Limited Danny Raposo Project Manager/Field Division 2.5 PUBLIC AND AGENCY CONSULTATION Public consultation is a key feature of the Class EA process. Through an effective public participation program, the proponent can generate meaningful dialogue between the project planners and the public, allowing an exchange of ideas and the broadening of the information base, leading to better decision making. 2-8

19 2 - Study Process Notification of Study Commencement The Notice of Study Commencement for the East Brampton Trunk Sanitary Sewer Twinning Class EA was posted to the Region of Peel website on June 6, 2013 and published in The Brampton Guardian newspaper on the following dates Wednesday, April 24, 2013 Wednesday, May 1, 2013 Initial contact letters, including the Notice of Study Commencement, were mailed to the stakeholders, agencies, local residents and businesses and utilities on June 6 th, A summary list of the agencies / stakeholders that were notified and copies of the newspaper advertisement are provided in Appendix A. The letters invited input on the planning and design process Stakeholder Consultation A summary of the comments provided by the stakeholders as a result of receiving the Notice of Study Commencement can be found in Appendix B. In addition, a copy of the s and letters received from the stakeholders is also provided in Appendix B. In addition to the correspondence noted above, meetings were held with the following stakeholders: Goreway Power Station 407ETR Ministry of Transportation Create a Treat - 10 Auction Lane Adesa Toronto Pearson Convention Centre Canada Food Inspection Agency CN Rail 2-9

20 Region of Peel Hydro One Toronto Region Conservation Authority Ministry of the Environment (MOE) A copy of the above mentioned meeting minutes is provided in Appendix C Public Information Centre The Public Information Centre was conducted on Tuesday, November 26th, 2013 between 6:00 pm 8:00 pm at the Pearson Convention Centre at 2638 Steeles Avenue East, Brampton. A copy of the PIC slides, attendance record and comment sheets are provided in Appendix D. 3 Problem Identification 3.1 INTRODUCTION Phase 1 of the EA planning process is the identification and description of the problem or opportunity. Factors leading to the conclusion that an improvement or change is needed are documented in this section. The project was defined from the problem statement developed in this phase. 3.2 PROBLEM IDENTIFICATION The Region of Peel s Master Plan highlighted the need to twin this section of trunk sewer to address capacity deficiency for servicing the existing and future Town of Caledon and Brampton East development. Furthermore, the existing system does not have redundancy to allow for the re-routing of flows in the event of an emergency (such as structural failure) or for routine maintenance purposes. In addition to capacity deficiencies, there are odour and corrosion problems with the existing trunk sewer system that will be considered while designing the new trunk sewer twinning. The objectives of the trunk sewer twinning project include: Address the capacity issues of the existing system between Goreway Drive and Queen Street and the intersection of Steeles Avenue and Highway 407 for the 2031 peak wet weather flow (PWWF). Provide enough capacity in the new sewer to take the entire 2017 PWWF (the year construction of the new sewer is estimated to be complete) and design a structure that enables the flow to be diverted from the existing trunk sewer to the new sewer allowing for maintenance and repair of the existing. Based on the requirements for the project as stated above, the following problem statement was developed for this project. 3-10

21 4 - Review of Background and Technical Information In order to address capacity deficiencies and redundancy, improvements are required to the Region of Peel s existing sanitary sewer system in order to adequately service Northeast Brampton and the Town of Caledon in the future. These improvements are to be done in such a manner as to minimize costs, disruption to traffic, the natural environment, and local businesses while at the same time meeting the Region s design standards. 4 Review of Background and Technical Information 4.1 INTRODUCTION In order to develop alternative solutions for the East Brampton Truck Sanitary Sewer twinning, the following technical evaluations were undertaken: Review of existing field conditions Review of existing utilities Review of geotechnical desktop investigation 4.2 EXISTING FIELD CONDITIONS One meter contour mapping of the project area was requested and obtained from the Region of Peel and was used as a foundation for assessing the technical feasibility of the alternative route alignments. AE developed profile information for nine (9) alternative alignments to determine which alignments were technically achievable based on existing ground elevations, pipe cover and conflicts with existing utilities. See Appendix E for alternative profiles. Site visits by AE design staff were conducted to verify all existing information along the various alignments, confirm the constructability of the alignments and identify any possible conflicts or issues that may impact the design or construction of the sanitary sewer. 4.3 EXISTING UTILITIES Contact was made with utility companies to obtain information on existing and future utilities and services within the project limits. Utilities that were identified within the project limits include: Bell Canada - underground cables and ducts Rogers Cable underground cables Enbridge Gas - underground mains Hydro One overhead cables Hydro One Brampton Underground cables Telus underground ducts 4-11

22 Region of Peel In addition to the above, background drawings of existing services, watermains, sanitary and storm sewers within the project limits were received from the City of Brampton and the Region of Peel. All of the information received on existing utilities and services was reviewed for each alignment to determine any possible conflicts with the proposed trunk sanitary sewer. 4.4 GEOTECHNICAL AND HYDROGEOLOGICAL INVESTIGATIONS AE retained SPL consultants to undertake the geotechnical investigation, environmental soil quality testing and provisional Hydrogeological Investigation for the East Brampton Trunk Sewer Project. SPL conducted a geotechnical desktop study for the project area to project what sub-surface conditions can be expected based on past borehole records and reports. Boreholes will be drilled along the preferred route to provide a more accurate insight of the subsurface conditions and to help determine the best construction methodology for the various sections of the proposed sanitary sewer. In addition to drilling boreholes for the preferred alignment, SPL will sample groundwater from selected observation wells and will test these samples for general and inorganic parameters to Provincial Water Quality Objectives method detection limits. The purpose of this testing is to determine if groundwater quality would be suitable for direct discharge to a local water course without pre-treatment. The groundwater quality information is important to the Permit to Take Water application and the associated groundwater discharge plan. 5 Natural Environment Social Economic Review 5.1 INTRODUCTION The following studies were undertaken in support of the Municipal Class EA. The following information is a summary of the reports provided by AE s sub-consultants, full reports can be found in the below mentioned appendices. 5.2 NATURAL ENVIRONMENT Niblett Environmental completed a detailed environmental assessment of the study area. Niblett s report highlighted a number of environmentally sensitive areas that will require particular attention during detailed design and construction. Through the Environmental Assessment AE has identified and evaluated four (4) creek crossings along the alignment. The creek crossings will be completed by a combination of open-cut and trenchless methods. It is anticipated that the creek crossing along the hydro corridor of the alignment will be completed by open cut methodology due to the minimal pipe cover. AE will review the possibility of trenchless construction for the creek crossing within the CN intermodal yard, the creek crossing east of Airport Road and the creek 5-12

23 5 - Natural Environment Social Economic Review crossing south of Highway 407 ETR to mitigate impacts on the water courses. All of the reviewed alignments have these four creek crossings in common. AE have been working together with sub-consultant Niblett Environmental and the Toronto Region Conservation Authority (TRCA) to mitigate the impacts to the environment. The complete environmental assessment report can be found in Appendix F. Conclusions Giving the existing project information the potential effects identification matrix and the risk assessment matrix tools have illustrated all potential negative impacts to the aquatic habitat will occur within the construction phase. The impacts have been categorized as a negative low and are considered as Low Risk. The proposed twinning of the East Brampton Trunk sewer construction activities, mainly the watercourse crossings, will not have a significant impact on the key natural heritage system features and functions once the appropriate mitigations measures suggested in the Environmental Assessment report in Appendix F are implemented. The impacts are temporary and mostly during the construction stage. Rehabilitation measures will restore vegetation within the construction footprint. In the impacts and mitigation section of the report, a number of recommendations regarding the protection of natural heritage features and aquatic habitat have been made to minimize impacts during the site preparation, construction and post construction period. On-site mitigation measures will replace and enhance the right-of-way vegetation communities and fish habitat currently found along Mimico Creek watercourse. All the recommended mitigation measures, including re-vegetation and maintaining natural riparian habitat, will result in improvements of the natural environment. 5.3 SOCIAL-ECONOMIC REVIEW Hardy Stephenson conducted a review of social-economic conditions within the study area. The land uses within the study area consist primarily of industrial and commercial operations focused on manufacturing, shipping, and retail plazas. In fact, there are only three residentially zoned properties in the entire area. One of the most significant characteristics of the study area is the fact that it is an important transportation hub with proximity to Highway 407, a number of CN Rail connections, as well as major roads such as Steeles Avenue East, Airport Road and Queen Street East. For this reason, consideration of traffic impacts from construction will be a major consideration and an important factor in the communications strategy. Communications regarding any potential impact on shipping operations will be essential, as this is expected to be a primary concern for area businesses. The proposed alignments run primarily through existing right-of-ways that abut the CN Rail Intermodal yard and Highway 407. A consistent liaison with management from both parties will be essential to the process. The complete report is found in Appendix G. 5-13

24 Region of Peel Conclusions Out of the proposed alternatives, Alignment No. 4 would result in the lowest overall socio-economic impact. A number of variations have been presented for this alignment which would all have roughly the same degree of impact, with only slight variations. Alignment No. 4 is the preferred solution from a socio-economic perspective for the following reasons: 1. Lowest degree of land use impact due to the route avoiding the driveways for Tim Horton s (8970 Goreway Dr.) and Petro Canada (8980 Goreway Dr.) and minimizing the loss of use of the Adesa Toronto parking area. 2. Avoids noise, dust, vibration and visual impacts on sensitive land uses. 3. Has a comparatively low level of impact on transportation options in the area by avoiding construction activities on long stretches of Goreway Drive and Steeles Avenue East. 4. Closely follows existing trunk sewer alignment. While Alignment no. 4 represents the lower overall socio-economic impact, it is important to note that the degree of difference from Alignment No. 1 (all variations) is relatively small. The majority of the route is the same for these alignments, with the only significant difference being the impact on land access while crossing the parking area / roadway access points for Adesa Toronto, Tim Horton s and Petro Canada. In summary, most land users in the area are expected to experience only minor to moderate impacts as a result of construction activities. There are only a small number of sensitive land uses in the study area and with proper mitigation measures in place; the socio-economic impact of the project has an overall minimal level of impact on land uses. 5.4 ARCHAEOLOGICAL ASSESSMENT AE s sub consultant Archaeological Services Inc. completed a Stage 1 archaeological assessment of the entire study area and is currently undertaking a Stage 2 assessment at the south tie in location of the project. All archaeological studies and investigation was carried out in accordance with the Standards and Guidelines for Consultant Archaeological Consulting in Ontario. The Stage 1 Archaeological Assessment focused on conducting background research on the project study area and included the following tasks: Background Research Reviewing pertinent provincial and federal government files; and Reviewing and compiling the results of a literature search. Archaeological Site Potential Evaluation Reviewing archaeological site location data 5-14

25 5 - Natural Environment Social Economic Review Evaluating the property s archaeological potential, based on characteristics that indicate where archaeological resources are most likely to be found. Conducting a property inspection of the project study area. This was undertaken in order to review the project study area to confirm and document archaeological site potential. All features of archaeological potential were recorded. Stage 1 Archaeological Assessment report The Stage 1 archaeological assessment report describes the results of all background research and the property inspection fieldwork previously completed. The report includes the following information: Results of the background research pertaining to previous archaeological investigations Geo-environmental setting and historic settlement Evaluation of archaeological site potential Results of the property inspection The Stage 1 Archaeological Assessment Report was submitted to the Ministry of Tourism, Culture and Sport for review and concurrence in accordance with licencing requirements under the Ontario Heritage Act. Conclusions The Stage 1 background study determined that 10 previously registered archaeological sites are located within 300m of the study area. A review of the geography of the study area suggested that the study area has potential for the identification of Aboriginal and Euro-Canadian archaeological resources The Stage 1 property inspection determined that the majority of the study area does not possess archaeological potential and is documented to have deep and extensive land disturbance, predominantly due to ROW construction. A small part of the study area possesses archaeological potential and requires Stage 2 archaeological assessment. A complete copy of the Stage 1 archeological assessment is found in Appendix H. The only area noted to have potential archaeological significance is located at the downstream tie in area of the trunk sanitary sewer and is mutual for all alternative alignments (See Figure 12 in Appendix H for further information on stage II investigation location).thus, in relation to archaeology; no particular alignment is preferred over the others. 5-15

26 Region of Peel 5.5 HERITAGE ASSESSMENT Archaeological Services Inc. also completed the cultural heritage assessment for the project. The Cultural Heritage Resource Assessment was completed in accordance with the Guidelines for Preparing the Cultural Heritage Resource Component of Environmental Assessments (1992); the Ontario Heritage Act (2005); Reference Guide on Physical and Cultural Heritage Resources (1996) and the Ontario Heritage Toolkit (2006). The cultural heritage resource assessment focused on conducting and analyzing background research and field survey results for the purposes of identifying impacts of the proposed undertaking on cultural heritage resources. The Cultural Heritage Resource Assessment involved the following: Background Historical Research and Preliminary Feature Identification A review of available primary and secondary source material was undertaken to produce a contextual overview of the study area. Available historic mapping, existing condition mapping, project mapping and aerial photographs were reviewed. Municipal heritage inventories were reviewed to identify properties and resources that had been previously identified as being of potential cultural heritage value. Field Survey A field review was undertaken to identify and photograph individual built heritage resources and cultural landscapes within the study area. No potential impacts to built heritage resources and cultural landscapes were found. Report A report was prepared to describe the results of the background research and cultural heritage field inventory and a complete copy of the heritage assessment can be found in Appendix I. Conclusions The results of background historic research and review of secondary source material, including historic mapping, revealed a study area with a rural land use history dating back to the early nineteenth century. However, the field review demonstrated that this area does not retain any intact cultural heritage resources within and/or adjacent to the proposed alignments. The proposed trunk sewer alignments do not appear to have the potential to negatively impact any known cultural heritage resources. Thus, in relation to cultural heritage, no alternative alignment has precedence over the others. 5.6 PERMITS AND APPROVALS Based on the preliminary recommendations provided above, and assuming all of the recommended mitigation measures described can be accommodated through the detailed design and construction staging 5-16

27 6 - Technical Review of Alternatives process, permits and approvals from the following authorities, agencies, company s, provinces and municipalities may be required for this project. Toronto Region Conservation Authority (TRCA) Department of Fisheries and Oceans (DFO) Provincial Approvals and Permits Ministry of the Environment (MOE) Ministry of Transportation (MTO) Ministry of Natural Resources (MNR) Municipal Approvals and Permits Region of Peel City of Brampton CN Rail Toronto Region Conservation Authority (TRCA) Utility Companies The specific requirements for such approvals will be refined and confirmed through the project s detailed design phase. 6 Technical Review of Alternatives 6.1 INTRODUCTION The goal of the Class Environmental Assessment process was to identify the preferred alignment for the new trunk sanitary sewer and to increase the conveyance capacity of the existing sanitary trunk sewer network with minimal impact on the environment. As such, a preliminary review of alternate trunk sewer alignments was completed with consideration given to the following initial screening criteria: Connection points to the downstream and upstream project limits are fixed Sewer system is a gravity system and grade of new sewer is to match closely to the existing system (i.e. no pumping, drop structures or siphons) Transfer existing sewer connections to the new twin trunk sewer where feasible Alignments on public lands (roads, easements, etc.) are preferred as compared to those on private lands (socio economic effects) Impact of the new alignment on businesses, industry and commercial properties Technically achievable with minimal utility conflicts Sufficient space should be provided for any necessary permanent and working easements Sufficient space should be provided to allow for construction and installation throughout the sewer alignments. Alignments should have land available for construction staging for trenchless installations, and minimize purchase of additional land 6-17

28 Region of Peel Crossings of transportation corridor and natural features should be technically feasible (e.g., Hwy 407, CNR, creek crossings, major arterial roadways, etc.) Meet crossing criteria stipulated by corridor owner Depth of cover Allow for easy access for subsequent maintenance and operation purposes Environmental considerations Cultural heritage considerations Based on the foregoing screening criteria, nine (9) initial alternative alignments were reviewed within the study area. Conceptual plan and profiles were developed for each alternative route to further assess the screening criteria and to eliminate any route that was not technically achievable. For the purpose of analyzing alternative routes only, a proposed twin trunk sewer size of 1350 mm diameter was chosen for the plan and profiles. The actual pipe size does not affect the criteria reviewed. Appendix E shows the conceptual plan and profile drawings for each alternative. 6.2 ALTERNATIVE ALIGNMENTS Figure 5 on page 6-21 outlines the existing sewer alignment and Figure 6 on page 6-22 indicates the alternative sewer alignments reviewed. A description of each is provided below. Alternative No.1 This alternative considers the new twin trunk sewer to be installed in close proximity and parallel to the existing trunk sewer alignment. Alternative No.1A This alternative is similar to Alternative No. 1 with the new twin trunk sewer located in close proximity to the existing trunk sewer alignment except for the alignment located at the downstream end of the system (adjacent to Highway 407). The alignment of the new trunk sewer at the downstream end would connect to the existing manhole located on the south side of Highway 407 and traverse east along the existing easement towards Steeles Avenue. The alignment would cross Steeles Avenue and then cross Highway 407 to the north. Alternative No. 1B This alternative is the same as either Alternative No. 1 or No. 1A with the new twin trunk sewer located in close proximity to the existing trunk sewer alignment except for a section crossing Intermodal Drive near the CN railway and Highway 407. Instead of the new alignment following the existing trunk sewer alignment starting at station as shown on the plan and profile for Alternative No. 1B in Appendix E, the new alignment would extend further east and cross the CN railway just north of Highway 407. From this location, the new alignment would continue north towards Intermodal Drive where the existing alignment is located. Alternative No. 1C This alternative can is the same as Alternative No. 1 with the exception of a short section at the top end of the sewer system located near Queen Street. The new trunk sewer would connect to the top end of the sewer system located at the intersection of Goreway Drive and 6-18

29 6 - Technical Review of Alternatives Queen Street and then head west along Queen Street and then south along Auction Lane towards the existing alignment. Alternative No. 1D This alternative is similar to Alternative No. 1A with the new twin trunk sewer located in close proximity to the existing trunk sewer alignment except for the alignment located at the downstream end of the system (crossing Highway 407). The alignment of the new trunk sewer at the downstream end would connect to the existing manhole located on the south side of Highway 407 and traverse east along the existing easement towards the Region of Peel odour control facility. The alignment would cross Steeles Avenue to the south east corner of the Pearson Convention Centre property before traversing Highway 407 to parallel the existing trunk sewer to the north tie in location. Note: After the Public Information Centre this alternative alignment was adjusted slightly at the Pearson Convention Centre location due to difficulties acquiring property. Instead of the trunk sewer crossing Steeles Avenue to the south east corner of the Pearson Convention centre is stops approximately 50m short of the Pearson Convention Centre Property and crosses Highway 407 at this new location and parallels the existing trunk sewer to the CN Intermodal Yard. In addition to the alignment change at the Pearson Convention Centre there was a slight alteration to the alignment through the CN Intermodal Yard. The change in alignment was required by CN to avoid conflict with their proposed future works within their north Intermodal yard. Instead of the proposed sewer twinning the existing sewer through the CN Intermodal yard and crossing the City of Brampton Storm Channel/CN tracks on the north side of Intermodal Drive, the revised alignment crosses the storm channel/ CN tracks immediately south of Intermodal Drive. The alignment then traverses north along the hydro corridor, on the east side of the CN tracks, to parallel the existing trunk sewer to the intersection of Queen Street and Goreway Drive. See Meeting Minutes dated May 27 th, 2014 in Appendix C for further information and discussions on alignment alteration. Alternative No. 1E This alternative incorporates elements of Alternative No.1B and No. 1D. The sewer alignment is the same as Alternative No. 1D from the south tie in location south of Highway 407 to west of the CN Intermodal Yard. From the CN Intermodal yard to the north tie in location at Queen Street the sewer alignment is the same as Alternative No. 1B. Alternative No. 2 This alternative parallels the existing trunk sewer system from the intersection of Goreway Drive and Queen Street and south to a location near Intermodal Drive. At this location, the new trunk sewer alignment continues south along a corridor east of the CN railway to Steeles Avenue. Once the alignment reaches Steeles Avenue, the new trunk sewer alignment would head west along Steeles Avenue towards the existing easement located next to the Region s odour control facility. The new trunk sewer alignment would then continue south along the existing easement and connect to the downstream connection location. 6-19

30 Region of Peel Alternative No. 3 This alternative considers a different alignment from that of the existing trunk sewer alignment. Maintaining the upstream connection point location, the new trunk sewer alignment would head south along Goreway Drive to Steeles Avenue and then continue west along Steeles Avenue to the Region s Odour Control Facility. From the odour control facility, the new trunk sewer alignment would then continue south along the existing easement and connect to the downstream connection location. Alternative No. 4 This alignment is similar to Alternative No. 1D. The Alignment is as per Alternative No.1D from the south tie in location south of Highway 407 ETR to the Mimico Creek crossing adjacent to the CN tracks. Instead of the alignment following the existing sewer to the north it turns to the east along the southerly property line of the Adesa parking lot to Goreway Drive where it then traverses north along Goreway Drive to the north tie in location at Queen Street. Alternatives 1 to 1E above are similar alignments to the existing trunk sewer but with some slight alignment alterations at various locations; alternatives 2 and 3 have more significant changes in alignment in comparison to the existing trunk sewer. Alignment No.4 was reviewed at the request of Adesa Toronto to mitigate impacts on their business during construction, See APPENDIX J for a full technical review of this alignment. It should be noted that the profile shown in the attached plan was generated from GIS contour mapping with a vertical accuracy of approximately +/- 1.0 meter. For the purpose of route alignment analysis, the contour mapping accuracy was considered sufficient. A topographical survey by conventional methods such as total station and GPS will be undertaken for the preferred alternative to obtain a more detailed level of accuracy acceptable for detailed design. 6-20

31 REPORT Figure 5 Existing Sewer Alignment 6-21

32 REPORT Figure 6 Alternative Route Alignments 6-22

33 REPORT 6.3 SCREENING OF ALTERNATIVE ALIGNMENTS Alternative No.1 New twin trunk sewer can be placed within the existing easement for most of the route limiting the need to acquire additional property or easements Creates opportunity to transfer existing sewer connections to the new trunk sewer Minor utility relocation will be required at Intermodal Drive Can achieve the required depth of cover Crossing criteria stipulated by corridor owners appear to be achievable Concerns with new trunk sewer given its close proximity to existing buildings Challenging tunnel crossing of Highway 407 due to limited space available for construction and close proximity of proposed sewer to existing utilities. Alternative No. 1A New trunk sewer can be placed within the existing easements for most of the route limiting the need to acquire additional property or easements Creates opportunity to transfer existing sewer connections to the new trunk sewer except for the connection on the north side of Steele Avenue Can achieve the required depth of cover Minor utility relocation will be required at Intermodal Drive Crossing criteria stipulated by corridor owners appear to be achievable Eliminates the new trunk sewer installation in close proximity to existing buildings just north of Steeles Avenue Major traffic impacts on Steeles Avenue during construction Eliminates the challenging Highway 407 crossing Alternative No. 1B New twin trunk sewer can be placed within the existing easements for most of the route limiting the need to acquire additional property or easements Creates opportunity to transfer existing sewer connections to the new trunk sewer Can achieve the required depth of cover Crossing criteria stipulated by corridor owners appear to be achievable Eliminates the impact of the new trunk sewer installation at CN Intermodal East Brampton front entrance location. Pipe would be completely exposed through the storm water management stream within the CN property resulting in major environmental concerns 6-23

34 Region of Peel Alternative No. 1C New twin trunk sewer can be placed within the existing easements for most of the route limiting the need to acquire additional property or easements Creates opportunity to transfer existing sewer connections to the new trunk sewer Can achieve the required depth of cover Minor utility relocation will be required at Intermodal Drive Crossing criteria stipulated by corridor owners appear to be achievable May reduce the impact of the new trunk sewer installation on businesses, industry and commercial properties along Auction Lane and Goreway Drive Major utility conflicts at Queen Street and Goreway Drive Major traffic impacts on Queen Street west of Goreway Drive Alternative No. 1D New twin trunk sewer can be placed within the existing easements for most of the route limiting the need to acquire additional property or easements Avoids construction on Steeles Avenue therefore mitigating traffic impacts. Creates opportunity to transfer existing sewer connections to the new trunk sewer Can achieve the required depth of cover No utility relocation will be required at Intermodal Drive Can cross the storm water management stream in the CN Intermodal Yard with minimal impacts. Eliminates the new trunk sewer installation in close proximity to existing buildings just north of Steeles Avenue Crossing criteria stipulated by corridor owners appear to be achievable Alternative No. 1E New twin trunk sewer can be placed within the existing easements for most of the route eliminating the need to acquire additional property or easements Avoids construction on Steeles Avenue therefore mitigating traffic impacts. Creates opportunity to transfer existing sewer connections to the new trunk sewer Can achieve the required depth of cover Pipe would be completely exposed through the storm water management stream in the CN property resulting in major environmental concerns Can cross the storm water management stream in the CN intermodal Yard with minimal impacts. Crossing criteria stipulated by corridor owner s appear to be achievable 6-24

35 6 - Technical Review of Alternatives Alternative No. 2 Not feasible due to lack of cover over new twin trunk sewer (Alternative No.2, Appendix E - Station to Station 2+350) Alternative No. 3 Not feasible due to lack of cover over new twin trunk sewer (Alternative No.3, Appendix E - Station to Station 3+150) Alternative No. 4 Not feasible due to conflicts with existing trunk sewer, services and utilities along Goreway Drive. AE were asked to review this Alternative Alignment by Adesa Toronto Representatives at a Project Meeting held on August 13 th, See Appendix K for further details on the route analysis. Alignment No.1B, Alignment No.1C, Alignment No. 2, Alignment No.3 and Alignment No.4 were not evaluated in the below summary due to insufficient pipe cover and/or major utility conflicts rendering the alignments to be technically unachievable. 6.4 EVALUATION CRITERIA The evaluation criteria indicated in Table 4 were then used to identify the preferred alignment of the trunk sewer. Table 4 - Evaluation Criteria for Selection of Preferred Alignment Evaluation Criteria Considerations Environmental Impact to water courses Technical - Construction Risk Proximity of alignment to structures and buildings that would increase construction risk - Relocation of Extent of utility relocation required Utilities Is the alignment achievable using conventional - Constructability construction methods - Property availability Is there property available to construct the proposed sewer - Traffic Open cut methodology versus tunnelling will have a 6-25

36 Region of Peel significant impact on traffic. Can the sewer be installed to function by gravity without the need for siphons or pumping Requirement of drop structures Socio / Cultural Impacts to local businesses Impacts to traffic Easement Requirements Availability of working and permanent easements Availability of construction storage areas within close proximity of the alignment Construction Cost Estimated cost based on pipe material. Each alignment has similar lengths so there is no significant cost difference for the alternative alignments assessed. 6-26

37 Significant benefit Alternatives Alignment No.1 Alignment No.1A Alignment No.1D Alignment No.1E Significant impact to creek - Pipe completely exposed through storm water management stream in CN property. This is a major environmental concern REPORT Table 5 Evaluation of Criteria Significant negative result Negative result No known Impact Positive benefit Environmental Minimal impact to creeks Minimal impact to creeks Minimal impact to creeks 6-27

38 Avoids conflict with buildings on Van Der Graff Crescent Standard crossing of Highway 407 Alternatives Alignment No.1 Alignment No.1A Alignment No.1D Alignment No.1E Pipe exposed through Creek in CN property No relocations required at Intermodal Drive No traffic impacts to Steeles Avenue during construction, tunnelling technology can be implemented at this location Property available for additional working/construction easement throughout the alignment Eliminates impact on commercial buildings on Van Der Graff Crescent Minimal traffic disruptions: -Goreway Drive Additional Easement required south of the Convention Centre and along Hydro corridor on the east side of the CN tracks, south of Intermodal Drive Significant Easement Requirements Region of Peel Technical Close proximity to existing buildings on Van Der Graff Crescent increasing construction risk Avoids conflict with buildings on Van Der Graff Crescent Avoids conflict with buildings on Van Der Graff Crescent Challenging crossing of Highway 407 and Steeles Avenue Standard crossing of Highway 407 Standard crossing of Highway 407 Minor relocation of existing utilities at Intermodal Drive No traffic impacts to Steeles Avenue during construction, tunnelling technology can be implemented at this location Insufficient property available for working/ construction easement at 8 Van Der Graff Crescent due to close proximity to building Minor relocation of existing utilities at Intermodal Drive Major traffic impacts to Steeles Avenue during construction Property available for additional working/construction easement throughout the alignment No relocation of existing utilities required at Intermodal Drive No traffic impacts to Steeles Avenue during construction, tunnelling technology can be implemented at this location Property available for additional working/construction easement throughout the alignment Socio / Cultural Close proximity to commercial buildings on Van Der Graff Crescent increasing construction risk Eliminates impact on commercial buildings on Van Der Graff Crescent Eliminates impact on commercial buildings on Van Der Graff Crescent Moderate traffic disruptions along - Goreway Drive - Intermodal Drive Significant traffic disruptions along - Goreway Drive - Steeles Avenue - Intermodal Drive Moderate traffic disruptions: - Goreway Drive - Intermodal Drive Easement Requirements Can be constructed mainly within existing easement Minimal Easement Requirements Additional Easement required south of Steeles Avenue and south of the Convention Centre Moderate Easement Requirements Additional Easement required south of the Convention Centre, north of Steeles Avenue Moderate Easement Requirements 6-28

39 Pipe material costs and total sewer length are similar for each alternative. Over All Score 3 rd 2 nd 1 st 4 th Significant benefit 6 - Technical Review of Alternatives Construction Costs Pipe material costs and total sewer length are similar for each alternative. Pipe material costs and total sewer length are similar for each alternative. Pipe material costs and total sewer length are similar for each alternative. Significant negative result Negative result No known Impact Positive benefit 6-29

40 REPORT 7 Preferred Alternative Alignment No.1D Based on the above evaluation, AE reviewed nine (9) alternatives alignments under the Schedule B Municipal Class Environmental Assessment. Through the Environmental Assessment Alternative Alignment No.1D was confirmed as the preferred option for the following reasons: Technically achievable with minimal utility conflicts Gravity sewer can be constructed without the need for pumping, drop structures or siphons. Flows can be transferred from the existing sewer connections to the new twin trunk sewer. Minimal Socio-Economic impacts Alignment 1D mitigates impacts on businesses, industry and commercial properties Sufficient property available to allow for construction and installation using conventional methods Crossing of Highway 407 ETR to meet Ministry of Transportation s pipe crossing criteria Sufficient pipe cover throughout the alignment Allows for easy access for subsequent maintenance and operation purposes No known environmental impacts 7.1 DESCRIPTION The proposed alignment of the new twin trunk sewer is located in close proximity to the existing trunk sewer alignment with the exception of the downstream end. The alignment of the new trunk sewer at the downstream end will connect to the existing manhole located on the south side of Highway 407 and traverse east along the existing Region of Peel easement towards the Region s Odour Control Facility (OCF). The alignment would cross Steeles Avenue to vacant lands on the north side of Steeles Avenue (approximately 50m south of convention centre parking lot) before traversing perpendicular to Highway 407 to parallel the existing trunk sewer north to the CN Intermodal Yard. The proposed alignment will cross the CN tracks immediately south of Intermodal Drive to the hydro corridor on the east side, traverse north along the hydro corridor crossing intermodal Drive and then twins the existing sewer to the north tie in location at Goreway Drive and Queen Street. The preferred alignment is shown in Figure

41 REPORT Figure 7 - Preferred Alignment 1D 7-31