The Rothsay animal rendering plant on Highway 5 will start discharging wastewater from a holding pond into Christie Lake Conservation Area a month earlier than normal to allow for the installation of a new filtration system.
Hamilton Conservation Authority directors last week approved the company’s request to begin sending the wastewater into a wetland that flows into the park’s most popular fishing pond on Oct. 1.
Plant manager David Willison said although the wastewater discharges meet provincial requirements 99.9 per cent of the time, when they don’t it’s usually because the existing filter is wearing out and not as efficient as the new one will be.
He said the $375,000 filter will be installed in December and Rothsay will work with authority staff to develop a monitoring protocol to ensure the discharges meet provincial requirements.
Rothsay’s licence allows it to discharge to the Christie wetland between Nov. 1 and March 31, but also provides for one-month extensions at either end of those dates with the authority’s approval.
Scott Peck, director of watershed planning and engineering, said the discharge won’t affect the pond in question because it is drawn down by Oct. 1.