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Princeton Wastewater Servicing Study

Princeton Wastewater Servicing Study. Public Information Centre No. 2 April 11, 2012. Slide 1. Water System Update. System will be commissioned in May and ready for connections All properties will receive notification at that time

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Princeton Wastewater Servicing Study

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  1. Princeton Wastewater Servicing Study Public Information Centre No. 2 April 11, 2012 Slide 1

  2. Water System Update • System will be commissioned in May and ready for connections • All properties will receive notification at that time • CSAP program has been reviewed by Council and the maximum cost to residents for water has been capped at $9,500. • Princeton residents will pay will this amount and not the actual cost of $12,600 (after CSAP grant).

  3. Presentation Agenda • Finalized Problem/Opportunity Statement • Alternatives • Evaluation of Alternatives and Evaluation Criteria • Evaluation Results • Public and Agency Consultation • Study Schedule and Next Steps Slide 2

  4. Purpose of PIC • To present, review and discuss results of preliminary evaluation of alternatives • To gain input from the Community on the information presented Slide 3

  5. Study Background • During the Princeton Water Servicing Study, the County received a petition signed by 130 Princeton residents, requesting that a wastewater servicing study be completed for Princeton • Upon receiving the petition: • Oxford County Public Works and Public Health and Emergency Services Departments reviewed all un-serviced and partially serviced villages • A priority list was developed for wastewater servicing studies based on public health and environmental concerns • Princeton was identified as having the highest priority for investigating wastewater servicing alternatives Slide 4

  6. Study Objective Princeton Wastewater Servicing Study Objective Overall objective of the Princeton Wastewater Servicing Study is to develop a wastewater servicing plan for the Community of Princeton that is environmentally responsible, socially acceptable and economically sustainable Slide 5

  7. Class Environmental Assessment Process Phase 1 Problem or Opportunity Existing Data Collection Review and Analysis Princeton Wastewater Servicing Study involves completion of Phases 1 to 4 of the Municipal Class EA process Phase 2 Alternative Solutions Development and Evaluation of Alternative Solutions We Are Here Phase 3 Alternative Design Concepts for Preferred Solution Development and Evaluation of Alternative Design Concepts for Implementation of the Preferred Alternative Phase 4 Environmental Study Report (ESR) Completion of an Environmental Study Report (ESR) and placement on public record for 30-day review period Phase 5 Implementation Design and Construction of the Preferred Solution Slide 6

  8. Existing Conditions • Wastewater treatment is currently provided by on-site wastewater septic tank systems • Analysis of existing septic systems was completed to: • Estimate the age and status of existing systems based on available records • Identify what type of replacement wastewater system could be installed on each property based on the requirements of the current Ontario Building Code Slide 7

  9. Life span of a typical septic system is 20 to 25 years Some systems can function effectively for 35 years Existing System Age Slide 8

  10. Ontario Building Code • The Ontario Building Code (OBC) specifies requirements for on-site wastewater treatment systems. Key requirements are: • Allows for the installation of conventional and advanced treatment Class 4 sewage system where technology selection and tile bed size is based on local soil and groundwater conditions • Specifies a number of required clearance distances between the tile bed and a building, and the tile bed and the property line • A replacement Class 4 system can be installed where the required clearance distances are not met under the Compliance Alternatives section of the Ontario Building Code as long as the capacity of the replacement system is not greater than the existing system Slide 9

  11. Current Ontario Building Code Requirements Slide 10

  12. Summary of Existing Conditions • Many existing septic systems will need to be replaced in the near term due to age • Replacement systems will need to comply with the current Ontario Building Code • It is estimated that 43% of existing septic systems are able to accommodate a new conventional septic system • Remaining properties will require an advanced treatment system or a holding tank Slide 11

  13. Future Growth in Princeton • Moderate growth within the existing community boundary is anticipated • Existing population (residential and equivalent non-residential) is estimated to be 833 persons including 629 residents plus an equivalent non-residential population of 204 persons • Future population (residential and equivalent non-residential) is estimated to be 1,518 persons Slide 12

  14. Future Growth in Princeton • Projected future wastewater flow for the Community of Princeton is 455 m3/d Slide 13

  15. Problem/ Opportunity Statement • Develop a wastewater servicing plan for the existing Community of Princeton that is environmentally responsible, socially acceptable and economically sustainable • It is estimated that 154 of 207 existing septic systems (74% of all existing systems) are now more than 10 years older than their design life and will require replacement in the short term due to their age Slide 14

  16. Alternative Solutions Slide 15

  17. Alternative Solutions Slide 16

  18. Evaluation of Alternatives • A broad range of evaluation criteria was used to evaluate the alternative solutions • Alternatives identified as having high impacts that could not be mitigated were eliminated from further consideration • Evaluation was conducted to identify the most feasible alternatives for further evaluation Slide 17

  19. Evaluation Criteria Slide 18

  20. Evaluation of Alternatives Slide 19

  21. Evaluation of Alternatives Slide 20

  22. Summary of Evaluation Results • Alternative Solution 1 - “Do Nothing” was eliminated from further consideration as: • High impacts on water resources, groundwater resources, adjacent land owners, and the risk of continued groundwater contamination • Alternative Solution 4 - New Wastewater Collection System and Diversion of Wastewater for Treatment to the Woodstock Wastewater Treatment Plant (WWTP) was eliminated from further consideration due to: • High risk that the required intra-basin transfer exception will not be granted Slide 21

  23. Summary of Evaluation Results • Alternative Solution 5 – New Wastewater Collection System and Diversion of Wastewater for Treatment to the Drumbo WWTP was eliminated from further consideration due to: • High Life Cycle Costs and requirements for additional study • Alternative Solution 6 - New Wastewater Collection System and Diversion of Wastewater for Treatment to the Paris WWTP was eliminated from further consideration due to: • Potentially high risk that negotiations could be unsuccessful and high Life Cycle Costs Slide 22

  24. Summary of Evaluation Results • Two Alternatives were identified to be carried forward for more detailed evaluation, namely: • Alternative 2 – Upgrade Private On-Site Wastewater Treatment Systems • Alternative 3 – New Wastewater Collection System and Treatment System to Service Princeton Slide 23

  25. Alternative 2 Slide 24

  26. Alternative 2 – O&M Costs • Operating and maintenance costs/property for a Class 4 system are estimated to be in the range of $100/yr • Operating and maintenance costs/ property for a Class 5 system are estimated to range from: $1,600/yr for single occupancy with a low wastewater generation rate to $13,000/yr for 4 person occupancy and a high wastewater generation rate Slide 25

  27. Alternative 3 Slide 26

  28. Short Listed Alternatives – Estimated Costs Slide 27

  29. Public Consultation • We are looking for your feedback on Alternatives 2 and 3 • Your feedback will be considered in the detailed evaluation • The detailed evaluation will conclude with a recommended preferred solution that will be presented at Public Information Centre No. 3 Slide 28

  30. Next Steps • Receive and consider public input • Complete detailed evaluation of Alternatives 2 and 3 and select a recommended preferred alternative • Develop and evaluate alternative design concepts for implementing the recommended preferred alternative • Hold Public Information Centre No. 3 to present the recommended preferred alternative and recommended preferred alternative design concept • Finalize preferred design • 30 day public review and comment period for the Environmental Study Report Slide 29

  31. Questions and Discussion Slide 30

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