Oregon City Council on Monday will consider an application to the Ohio Public Works Commission (OPWC) for financial assistance from the State Capital Improvements Fund and the Local Transportation Improvement Program Fund for improvements to the wastewater treatment plant at 1570 Dupont Road.
The project is required, as part of the city’s NPDES (National Pollutant Discharge Elimination System) permit from the Environmental Protection Agency, to increase the secondary treatment capacity of the wastewater treatment plant from 24 MGD (Millions of Gallon per Day) to 36 MGD to eliminate secondary treatment bypasses and sanitary sewer collection system overflows during wet weather events.
The project will be constructed in two phases over the next five years.
Phase 1 project improvements consist of the replacement of two influent screens, replacement of three raw sewage pump motor drives, replacement of two blowers, full replacement of air piping and replacement of air diffusers in the aeration tanks and a dissolved oxygen control system, site restoration, and associated Supervisory Control and Data Acquisition upgrades.
“This is a necessary step to move this project forward,” Administrator Mike Beazley said at a committee of the whole on Monday.
Public Service Director Paul Roman said the influent screens will be replaced with smaller screens, which are required by the EPA to be installed by 2014.
“We have to reduce the screenings,” said Roman. “The size of the screening is just a finer screen to remove as much debris as possible so it doesn’t go all through your treatment process. It actually saves on maintenance costs for your operators to remove that debris somewhere else throughout the process. This way it’s all removed up front.”
Roman said the screens are on a conveyor belt.
“As the flow is coming into the plant and the flow is going through the screen, the screen is removing any debris that’s in that sewage,” he explained. “And that literally pulls it up and goes onto a conveyor belt.”
The city must meet a timeline according to the NPDES permit to complete the project.
“This application is trying to get as much OPWC funding as much as possible. In terms of financing, we still have to require the outside users to be a part of the cost share of this project,” said Roman.