ENVIRONMENTAL STUDY REPORT WASTEWATER MUNICIPAL CLASS ENVIRONMENTAL ASSESSMENT (SCHEDULE ‘C’) Prepared for: The Corporation of the Town of Perth “This report is protected by copyright and was prepared by R.V. Anderson Associates Limited for the account of the Corporation of the Town of Perth. It shall not be copied without permission. The material in it reflects our best judgment in light of the information available to R.V. Anderson Associates Limited 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. R.V. Anderson Associates Limited accepts no responsibility for damages, if any, suffered by any third party as a result of decisions made or actions based on this report.” RVA 132873 June 2014 The Corporation of the Town of Perth TOC 1-1 ENVIRONMENTAL STUDY REPORT TABLE OF CONTENTS Page EXECUTIVE SUMMARY ................................................................. ES-1 1.0 INTRODUCTION ....................................................................... 1-1 1.1 Background ................................................................................................. 1-1 1.2 Study Area................................................................................................... 1-1 1.3 MCEA Process ............................................................................................ 1-3 2.0 PROJECT BACKGROUND AND JUSTIFICATION .................. 2-1 2.1 Problem Definition ...................................................................................... 2-1 2.2 Project Justification ................................................................................... 2-1 2.3 Community Growth Projections ................................................................ 2-1 2.3.1 Existing Development ............................................................................................. 2-1 2.3.2 Future Development ............................................................................................... 2-1 2.4 Population Growth Projections ................................................................. 2-2 2.5 Water and Wastewater System Review .................................................... 2-2 2.5.1 Water System ......................................................................................................... 2-2 2.5.2 Stormwater System ................................................................................................ 2-3 2.5.3 Wastewater System ................................................................................................ 2-3 2.6 Future Flow Projections ............................................................................. 2-4 3.0 INVENTORY OF EXISTING ENVIRONMENT ........................... 3-1 3.1 Socio - Economic ....................................................................................... 3-1 3.1.1 Official Plan ............................................................................................................ 3-1 3.1.2 Strategic Plan 2022 ................................................................................................ 3-2 3.2 Natural Environment .................................................................................. 3-3 3.2.1 Climate and Rainfall ............................................................................................... 3-3 3.2.2 Geology, Surface Soils, and Natural Vegetation ..................................................... 3-3 3.2.3 Terrestrial and Aquatic Life ..................................................................................... 3-3 3.3 Assimilative Capacity Study ...................................................................... 3-4 4.0 ALTERNATIVE SOLUTIONS .................................................... 4-1 4.1 Description of Alternative Solutions ......................................................... 4-1 Environmental Study Report FINAL RVA 132873 June 2014 The Corporation of the Town of Perth TOC 1-2 4.1.1 Alternative 1: Do Nothing ........................................................................................ 4-1 4.1.2 Alternative 2: Biomechanical Wastewater Treatment Plant (WWTP) ...................... 4-1 4.1.3 Alternative 3: Membrane Bio Reactor (MBR) .......................................................... 4-1 4.1.4 Alternative 4: Sequencing Batch Reactors (SBR) ................................................... 4-2 4.1.5 Alternative 5: Additional Lagoon Cell ...................................................................... 4-2 4.1.6 Alternative 6: Lagoon Aeration ............................................................................... 4-2 4.1.7 Alternative 7: Rotating Biological Contactor (RBC) ................................................. 4-2 4.1.8 Alternative 8: New Hamburg Process ..................................................................... 4-2 4.1.9 Alternative 9: Peatland/Wetland.............................................................................. 4-3 4.1.10 Alternative 10: Submerged Attached Growth Reactor (SAGR) ............................... 4-3 4.2 Evaluation of Alternatives.......................................................................... 4-4 5.0 PREFERRED SOLUTION ......................................................... 5-1 5.1 Alternative Designs .................................................................................... 5-1 5.1.1 Option A: Construct SAGR beds in Cell 4 (Dry Cell) ............................................... 5-2 5.1.2 Option B: Construct SAGR beds in Cell 3 (Wet Cell) .............................................. 5-3 5.2 Comparison of Design Alternatives .......................................................... 5-3 5.3 Recommended Design ............................................................................... 5-5 5.4 Phasing ....................................................................................................... 5-5 6.0 PROJECT DESCRIPTION ........................................................ 6-1 6.1 OPTAER Wastewater Treatment System .................................................. 6-1 6.2 Civil Works .................................................................................................. 6-2 6.3 Estimated Capital Costs ............................................................................ 6-3 7.0 MONITORING ........................................................................... 7-1 7.1 Suggested Effluent Limits ......................................................................... 7-1 7.1.1 Future Phosphorus Control ..................................................................................... 7-2 8.0 CONSULTATION ...................................................................... 8-1 8.1 Notice of Commencement ......................................................................... 8-1 8.2 Public Information Centres ........................................................................ 8-1 8.3 Consultation with Review Agencies and Other Stakeholders ................ 8-1 8.4 Notice of Completion ................................................................................. 8-1 9.0 REFERENCES .......................................................................... 9-1 Environmental Study Report FINAL RVA 132873 June 2014 The Corporation of the Town of Perth TOC 1-3 LIST OF TABLES Table 1: Wastewater Flows for Perth Lagoon (2006 – 2013) ................................................... 2-3 Table 2: Wastewater Flow Components .................................................................................. 2-4 Table 3: Future Wastewater Flow Projections ......................................................................... 2-4 Table 4: Water Balance (MNR, 1984) ..................................................................................... 3-3 Table 5: Recommended Limits for Effluent Parameters .......................................................... 3-4 Table 6: Evaluation Criteria ..................................................................................................... 4-4 Table 7. Evaluation Summary ................................................................................................. 4-5 Table 8: Comparison of Alternative Designs ........................................................................... 5-4 Table 9: Phasing Schedule. ................................................................................................... 5-6 Table 10: Estimated OPTAER Wastewater Treatment System Costs ..................................... 6-3 Table 11: Estimated Civil Works Costs ................................................................................... 6-4 Table 12: Estimated Capital Cost Summary ............................................................................ 6-4 Table 13: Suggested Effluent Limits ........................................................................................ 7-1 LIST OF FIGURES Figure 1 – Aerial view of the Perth Wastewater Lagoon. ......................................................... 1-2 Figure 2 – Perth Wastewater Lagoon. ..................................................................................... 1-2 Figure 3 – Municipal Class Environmental Assessment Process............................................. 1-4 APPENDICES APPENDIX 1 – Population Projections APPENDIX 2 – Perth Lagoon Flows and Flow Projections APPENDIX 3 – Geotechnical