The City of London (the City) is planning for future growth and development expected on the east side of the City, within the Vauxhall and Pottersburg wastewater treatment plant (WWTP) sewersheds. The map below provides an illustration of these sewershed boundaries. The City is preparing to undertake a Schedule C Municipal Class Environmental Assessment (EA) to increase the treatment capacity at the Vauxhall WWTP from its current capacity of 20,900 cubic metres per day (m3/d), in stages, up to a future treatment capacity of 60,000 m3/d.
Optimization of the Pottersburg and Vauxhall WWTPs has been the subject of several previous studies conducted by the City. As both facilities are aging, it was forecast that both plants will require major equipment replacements or upgrades in the coming years. Accordingly, a project was recommended to permit flows to be transferred between the two plants, allowing for major plant equipment to be taken out of service while ensuring uninterrupted treatment of all wastewater generated in the east end. An interconnecting pipeline to enable this transfer of flow is currently under construction. This project will also provide operational flexibility needed to allow the City to optimize the use of available treatment capacity at both facilities.
A recently completed Municipal Class EA Master Plan, called the East London Sanitary Servicing Study (ELSS), focused on servicing future growth in the east end. This study evaluated methods of providing wastewater treatment for the population growth expected in the short- and long term in both sewersheds. This study assessed the condition and current capacity of both plants and found that:
- Vauxhall WWTP could be re-rated to increase its treatment capacity, without major capital expansion and cost, based on minor improvements and operational optimization; and
- Vauxhall WWTP was in better condition and would be less costly to expand than Pottersburg WWTP to service short-term growth needs.
With the completion of the interconnection pipeline project, it will be possible to transfer wastewater from the Pottersburg sewershed to Vauxhall WWTP for treatment, making effective use of the existing additional capacity. The ELSS therefore recommended that planning be initiated now to consider how and when increases in Vauxhall WWTP capacity should occur to support the short term growth projections in the combined Vauxhall and Pottersburg sewersheds.
The current study will define expansion phases and triggers to realize the ultimate expansion up to 60,000 m3/d. Specifically, the purpose of this study is to complete a Municipal Class EA to plan for the phased expansion of the Vauxhall WWTP and prepare the conceptual design for the short term expansion phases. The study will follow guidance outlined in the Municipal Class EA document (as amended in 2007, 2011, and 2015).
Public and agency consultation is a key component of the Class EA process, and we value your input during the planning process. If you wish to be placed on the mailing list to receive notices and information, or, if you wish to provide comments at any time during the Class EA process, you can do so by using the contact information listed in contacts.
Please note that comments will be maintained for reference throughout the project and will become part of the public record. Under the Municipal Freedom of Information and Protection of Privacy Act and the Environmental Assessment Act, any personal information such as name, address, and telephone number included in a submission will become part of the public record unless the comments specifically request that such personal details not be included in the public record.