City of Toronto

Toronto, OntarioEramosa is working with the City of Toronto on a number of upgrade initiatives to update aging infrastructure and improve system performance throughout their water and wastewater facilities.

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Eramosa has been retained by Black & Veatch for two major upgrade projects at both the Humber and Ashbridges Bay Wastewater Treatment Plants in the City of Toronto. As well, we also worked to remedy false alarms for all stations within the Greater Toronto Area (GTA) water distribution system.

The Humber project includes upgrades to the aeration and secondary clarifiers section of the North and South plants, and also includes modifications to the North plant primary clarifiers, ferrous chloride system, plant wide sump pump systems, and instrument pressurized air systems. Our team was retained to review the status of the current Plant Control System, provide recommendations for upgrades (such as converting legacy Allen-Bradley controllers to the City standard GE PLC), and to develop designs for the new Instrumentation and Control (I&C) and Process Control Systems (PCS). All of this is being done in conjunction with Black & Veatch’s process and structural upgrades. This requires our team to closely coordinate with the process and civil engineers as well as the City’s operational and PCS teams. The project is scheduled for completion in 2022.

At the Ashbridges Bay WWTP, Eramosa was retained to review the conditions of the control, instrumentation, network, and human interface equipment to provide recommendations as part of a future use assessment. The evaluation will be used in determining the direction of any impending upgrades. These may include complete refurbishment of both the M and T buildings, new electrical substation, replacement of pumps, conduits, and valves, or the construction of a brand new pumping station with the decommissioning of the existing buildings. The City is also considering the need for Wet Weather Flow (WWF) storage tunnels and a new WWF pumping station. Eramosa will provide design and contract administration help for the I&C, SCADA, and networking upgrades. Final project completion is estimated to be Fall 2016 at a capital cost of $1.6 million.

In addition to these major capital projects, Eramosa has also completed work for the City and its PCS group to condition extraneous alarms within the Greater Toronto Area (GTA) water distribution system and the Island Water Treatment Plant on Toronto Island. The water distribution system includes pumping stations, reservoirs, and water towers using GE 90-30 PLCs. The valve, flow, and pressure chambers are utilizing legacy Bristol RTUs. The City standard for alarm conditioning requires that the logic be at the PLC level. This approach was used for the GE 90-30 PLCs utilizing VersaPro PLC programming software. It was also employed for inserting additional conditioning within the GE Proficy iFIX environment to automatically acknowledge tags that are creating unnecessary alarms. For sites using Bristol RTUs, the conditioning was handled only within the GE Proficy iFIX blocks. This avoided the requirement of working with the legacy RTUs which are prone to failure and are often in difficult-to-access locations requiring confined space entries and road closures.

As system integrators for GE Proficy iFIX products, and with our extensive knowledge of GE, Allen-Bradley, and Bristol controller systems, Eramosa is well positioned to provide superior solutions to the City as they look to strengthen and streamline their critical SCADA system infrastructure.

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