Long Term Water Supply & Wastewater Treatment Strategy Class EA Tillsonburg Systems

1. Long Term Water Supply & Wastewater Treatment Strategy Class EA Tillsonburg Systems Steering Committee Meeting #2 February 4, 2010

2. Meeting Agenda Introductions Problem Statement and Project Objective Groundwater Exploration Program Water Supply Alternatives Wastewater Treatment Alternatives Public Meeting Next Steps

3. Problem Statement and Project Objectives

4. Problem Statement To determine the most cost - effective, environmentally sound, and sustainable approach to provide water and wastewater servicing to accommodate future growth in the Community of Tillsonburg.

5. Project Objectives • To undertake a groundwater exploration / assessment program to identify potential well locations to meet the short and medium term water supply capacity needs. • To prepare a Water and Wastewater Master Plan to meet the 25-yr planning horizon (2034) in accordance with the Municipal Class Environmental Assessment (Class EA) process (Phases 1 and 2). • To assess the sufficiency of the water distribution system and sewage collection system with respect to trunk water and sanitary sewer mains. • To determine the viability of local groundwater supplies to meet the communities needs for the next 50 years; and • To complete Phase 3 and 4 of the Class EA process for wastewater treatment capacity expansion following the recommendations of the Master Plan.

6. Expansion of Water Supply Study Area Water supply study area has been expanded to include Tillsonburg, the communities of Otterville and Springford, and Norwich Expansion of the study area results in several new water supply options that are being considered. Due to the expansion of the water supply study area, the Water Supply Master Plan will be separated from the Wastewater Treatment Plant Schedule C Class EA. A Water Supply Master Plan report will be completed and filed for public comment. An Environmental Study Report (ESR) for wastewater treatment will be completed and filed for public comment.

7. Groundwater Exploration Program

8. Drilling Locations

9. Drilling and Testing Results • TW1/09-deep overburden, theoretical yield of 786 IGPM, elevated iron • TW2/09-theoretical yield of 100 IGPM, elevated (naturally occurring) arsenic, needs more development • TW3/09-Theoretical yield of 385 IGPM, some methane, constructed as a production well • TW4/09-similar to Springford well, theoretical yield of 40 IGPM, elevated manganese

10. Drilling and Testing Results (cont’d) • TW5/09-no suitable material in overburden, constructed as bedrock well • Theoretical yield of 1127 IGPM, elevated H2S and methane typical of bedrock in the area • Martin Well-high yield, poor water quality, poor condition

11. Recommended Actions • Abandon TW2/09 due to arsenic concerns • Conduct long term testing of selected wells • Look at options to treat natural occurring water quality issues

12. Water Supply Alternatives

13. Population and Consumption Data

14. Available and Secure Capacity Note 1: The available system capacity for Tillsonburg includes Wells 3 and 8 Note 2: The secure capacities are based on Wells 4 and 5 being offline for Tillsonburg, the Otterville wells being offline and Wells 2 and 5 offline in Norwich

15. Alternatives • Do Nothing • Expand the ground water supply in Tillsonburg and no changes to the Otterville-Springford and Norwich Water Supply Systems • Expand the ground water supply in Tillsonburg and connecting to Otterville-Springford and no changes to the Norwich Water Supply System • Expand the ground water supply in Tillsonburg and connecting to the Otterville-Springford and Norwich Water Supply Systems • Expand the ground water supply in Tillsonburg and connecting the Otterville-Springford and Norwich Water Supply Systems • Connect to the Nanticoke Grand Valley Area Water Supply (Long-Term) • Connect to the Elgin Area Water Supply System (Long-Term)

16. Alternative 1 – Do Nothing

17. Alternative 2 – Continue to Operate Three Water Systems • Expand the ground water supply in Tillsonburg and no changes to the Otterville-Springford and Norwich Water Supply Systems

18. Alternative 3 – Two Water Systems • Expand the ground water supply in Tillsonburg and connect to Otterville-Springford and no changes to the Norwich Water Supply System

19. Alternative 3Two Water Systems

20. Alternative 4 – One Water System • Expand the ground water supply in Tillsonburg and connect to the Otterville-Springford and Norwich Water Supply Systems

21. Alternative 4One Water System

22. Alternative 5 – Two Water Systems • Expand the ground water supply in Tillsonburg and Connect the Otterville-Springford and Norwich Water Supply Systems

23. Alternative 5 Two Water Systems

24. Alternative 6 – Nanticoke Grand Valley Area Water Supply • Preliminary study has shown that project is feasible • Estimated cost $1.2B (2008 $) for treatment facility, pipeline pump stations and reservoirs • Likely implementation date 2035 or beyond • Partners (Waterloo, Brantford, Brant, Norfolk, Haldimand, Six Nations and Mississaugas of the New Credit) are currently reviewing their interesting in continuing to participate. • Evaluated as a long-term (after 25-year planning horizon) option. • Oxford County will sit as an observer on the project in the future.

25. Alternative 7 – Elgin Area Water Supply • Alternate connection points: • Aylmer (watermain twinned to Talbot Pumping Station) – 27 km • Port Burwell – 27 km • Capacity buy-in charge pays for system upgrades • Agreements with primary and secondary boards • Evaluated as a long-term (after 25-year planning horizon) option

26. Wastewater Treatment Alternatives

27. Historical Flows to the Tillsonburg WWTP • The Tillsonburg WWTP has a Certificate of Approval (C of A) rated average day flow (ADF) capacity of 8,180 m3/day. • The historic 5-yr average ADF to the Tillsonburg WWTP is 6,737 m3/d, or 82 percent of the plant’s C of A rated ADF capacity.

28. Average Day Flow Projections to WWTP

29. Wastewater Flow Projections Note: The existing ADF rated capacity of the Tillsonburg WWTP is 8,180 m3/day, and consists of two secondary treatment trains. If the preferred solution is to expand the plant on-site as a conventional activated sludge process, the most practical approach would be to add an additional treatment train with the same capacity as the existing trains. As such, the plant would practicably be expanded to an ADF capacity of 12,270 m3/day. Both of the flow projection scenarios would be accommodated within this plant expansion.

30. Proposed Limits

31. Alternatives • Do Nothing; • Limit Community Growth; • Reduce Wastewater Flows through Water Efficiency and Sewer Rehabilitation; • Expand and/or Upgrade the Tillsonburg WWTP; • Construct a New Tillsonburg WWTP on the Existing Site; • Construct a New Tillsonburg WWTP on a New Site; and, • Retain the Existing Tillsonburg WWTP and Construct a New Plant for New Growth.

32. Evaluation of Alternatives

33. Criteria Evaluation Least expensive Most expensive

34. Criteria Evaluation Least expensive Most expensive

35. Preferred Alternative • Alternative 4 – Expand and Upgrade the Existing Tillsonburg WWTP • Lowest relative 25-Year Life Cycle Cost • Maximum use of existing infrastructure • Minimal impact on natural and social environment • No land acquisition required

36. Public Meeting

37. Public Consultation • Public Information Centre • PIC #1 at end of Water Supply Master Plan and Phase 2 of the WWTP Schedule C Class EA • Tentatively scheduled for the week of March 8 – 12

38. Next Steps

39. Next Steps • Finalize Water Supply Alternatives Analysis • Select Recommended Alternative • Finalize date and advertise PIC#1 • Prepare Water Supply Master Plan Report • Complete Phases 3 and 4 of Schedule C Wastewater Treatment Class EA