Environmental Study Report Regional Municipality of Peel Lakeview and Port Credit Community Sanitary Sewer Improvements Class Environmental Assessment August 2007 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 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. ENVIRONMENTAL STUDY REPORT Executive Summary The sanitary sewerage system in the Lakeview and Port Credit communities has a history of infiltration and inflow during heavy rainfall events. Over the years considerable work has been completed in the area to provide relief. This work has included upgrading area sewage pump stations and twinning the Port Credit Relief Sewer. In 2004, the Region retained Associated Engineering (AE) to complete a Schedule ‘C’ Class Environmental Assessment to determine how to best address the problem. Public Information Centre (PIC) # 1, presenting alternative solutions, was held on September 14, 2006 and two comments were received both in favour of Solution 3 or 4. Based on the comprehensive rating, solution 3 was selected. Solution 3 consists of: Construct a new pump station on Lakeshore Road East across from Beechwood Avenue; Construct new sanitary trunk sewer westerly along Lakeshore Road East; Construct new gravity sewer on Beechwood Avenue which will allow the decommissioning of the existing syphon under Cooksville Creek; and Construct new forcemain from the new pump station easterly to the existing 1650 mm sanitary sewer located on Lakeshore Road East near Alexandria Avenue. The project team investigated several locations for the new pump station and at PIC #2 these locations and their rating were presented to the public, along with some conceptual designs. PIC # 2 was held April 25, 2007. The preferred location, as determined by public comment and the comprehensive rating, is 501 Lakeshore Road East, on the eastern part of the property. Recognizing that this requires the acquisition of private lands, the Region has initiated negotiations with the property owner. The Region received several comments with respect to the selection of a preferred location. While all comments were reviewed and taken into consideration in preparation of this report, two comments carry special significance. The Mississaugas of Scugog First Nation forwarded a comment stating that the area in which the work is proposed is subject to an unresolved land claim. The project team has attempted contact to try to resolve the issue and to find a way to allow the project to proceed. Our attempt has been unsuccessful to date and this issue is still outstanding. The owner of the property of the preferred pump station location submitted written comments with respect to the work raising two concerns: i Region of Peel Executive Summary • Impact to their property; and • Potential conflict with the existing floodplain for Cooksville Creek. The response is attached in Appendix “B”. Summarized we note that the City of Mississauga is reconstructing the bridge on Lakeshore Road East over Cooksville Creek. The new bridge, once completed will allow more flow and reduce the upstream floodplain. The preferred pump station location will no longer be in the flood plain once completed. As for the impact to the property, the Region will negotiate suitable compensation with the landowner. AE on behalf of the Region will be publishing this report for a public review period. The Class EA process entitles members of the public, interest groups and review agencies to review the ESR for thirty (30) days. During this time, any person, interest group or agency that has outstanding concerns which cannot be resolved by discussion with the Region may request a Part II Order by submitting a written request to the Ministry of the Environment at the following address: Minister of the Environment 135 St. Clair Avenue West, 12th Floor Toronto, Ontario M4V 1P5 If no Part II Order requests are received within the thirty (30) day review period, the Region will proceed with the next phase to determine how to implement the design of the preferred solution. It is the ultimate aim of the Region to proceed to construction. The screening report issued at the end of Stage 2, dealing with the selection of a preferred alternative is attached as Appendix “I”. All notices, comments and boards associated with the study commencement and PIC #1 are contained within that report. ii ENVIRONMENTAL STUDY REPORT Table of Contents SECTION PAGE NO. Executive Summary i Table of Contents iii 1 Introduction and Background 1-1 2 Class Environmental Process 2-1 3 Methodology 3-1 3.1 Federal and Provincial Legislation 3-1 3.2 Study Area Description 3-1 3.3 Study Methodology 3-3 4 Public Consultation 4-1 4.1 Review Agencies 4-1 4.2 Public Consultation Program 4-1 5 Design Concepts 5-1 5.1 Technical Merit 5-1 5.2 Natural Environment 5-2 5.3 Social Environment 5-2 5.4 Financial 5-2 5.5 Review of Alternative Locations 5-2 5.6 Pump Station Design 5-4 6 Preferred Design Concept 6-1 7 Construction Methods 7-1 7.1 Crossing of Cooksville Creek 7-1 7.2 Beechwood / Ritchie Gravity Sewer 7-1 7.3 Lakeshore Gravity Trunk Sewer 7-1 7.4 Lakeshore Forcemain 7-1 8 Construction Mitigation 8-2 iii Region of Peel Table of Contents 8.1 Shaft Location at Lakeshore Road and East Avenue 8-2 8.2 Proposed Pumping Station Location 8-2 8.3 Construction during the Winter 8-2 8.4 Maintain Access to the Waterfront Trail 8-2 8.5 Simultaneous Construction of Different Phases 8-3 8.6 Street Access 8-3 9 Requirements for Implementation 9-1 9.1 Construction of the Pump Station 9-1 9.2 Construction of Lakeshore Gravity Sewer 9-1 9.3 Construction of Beechwood / Ritchie Gravity Sewer 9-1 9.4 Lakeshore Forcemain 9-1 9.5 New Receiving Structure 9-1 9.6 Existing Syphons Under Cooksville Creek 9-2 10 Next Steps 10-1 Appendix A - Notifications Appendix B - Public Information Centre/Comments Appendix C - Review Agency Mail Out Appendix D - Rating of Design Concepts Appendix E - Traffic Impact Assessment Appendix F - Social Impact Assessment Appendix G - Archaeological Assessment Appendix H - Geotechnical Assessment Appendix I - Stage 2 Report - Preferred Solution iv ENVIRONMENTAL STUDY REPORT 11 Introduction and Background The Lakeview and Port Credit communities have a history of sanitary sewer surcharging during heavy rainfall events due to inflow and infiltration of storm water into the system. Over the years considerable work has been completed in the area to provide relief. This work has included upgrading area sanitary sewage pump stations and sanitary sewer capacity. To address the problem, the Region of Peel (Region) retained Thompson Flow Investigations Inc. to investigate the problem and to recommend a course of action. In October 2001 a report was completed which recommended isolating the homes from the Hydraulic Grade Line (HGL) as a temporary solution and ultimately lowering the HGL to effect a more permanent solution by eliminating infiltration and inflow. Secondly, the Region initiated a study process to develop a long-term system wide solution. KMK Consultants Limited prepared a report (Capacity Analysis Study – Beach Street SPS and Trunk Sewers) in January 2002 that outlined some alternatives to lower the HGL and reduce the potential for infiltration and inflow . The study proposed a wide range of options from constructing new pump stations to rebuilding the existing Beach Street Pump Station and associated trunk sewers. These alternatives are subject to the Class Environmental Assessment Process (Class EA) and therefore could not be implemented until the Class EA was completed. In addition, the Province of Ontario has legislated intensification within existing urban areas. The increase in base sanitary flows due to development increases the urgency to eliminate inflow and infiltration from the sanitary sewerage system. In 2004 the Region retained Associated Engineering (AE) to complete a Schedule C Class EA to move this project along to construction. This study incorporates and builds on the work previously completed. The study area is the catchment for the Beach Street pump station however; the project has concentrated more on the area within the Lakeview Community that experienced high inflow and infiltration (See Figure 1 below). 1-1 Region of Peel 1 - Introduction and Background ATWATER STREET ANGELENE STREET O I R A A R T H . N T D O R W R A U C H LAKESHORE ROAD D O O W H C . E E E V B A BEACH ELMWOOD STREET PS PS HIAWATHA PS STUDY AREA Figure 1 – Study Area The Region determined to provide an extra level of public input into this process and issued a report at the end of Stage 2 dealing with the preferred solution similar to preparing a Master Plan. The project team wanted to ensure the public was aware of the course of action and was accepting of the preferred solution.