The Public Works Department maintains all storm sewers throughout the city.
- All sewers line are flushed to prevent the buildup of settlement or debris over time.
- Regular inspections with the CCTV (Closed Circuit Television) truck assist the Public Works Department in establishing condition ratings of sewer lines and identify areas in need of repairs.
- Catchbasins are cleaned with a vacuum truck of any debris that has settled in the sumps, to prevent debris from entering the storm sewer system and outfalls, such as local creeks, Mohawk Lake and the Grand River.
- Streams and creeks are inspected regularly for debris, to prevent flooding.
- The Public Works Department responds to spills, which may need placement of booms or absorbent to prevent a spill from entering into the storm system (more info under spills).
- The Public Works Department repairs all storm manholes and catchbasins as well as main sewer lines, through open cut or spot repairs.
- Regular inspection are carried out of the dyke system, and the outfalls along the dyke.
- Inspections of outfalls throughout the city, would involve clearing out of brush, trimming tree's, maintaining the ditch line for proper flow.
Oil/grit separators (OGS) are used to trap and retain oil and/or sediment in detention chambers, usually located below ground. They operate based on the principles of gravity-based sedimentation for the grit, and phase separation for the oil. There is minimal attenuation of flow in oil/grit separators since they are not designed with extended detention storage.
Separators are often used as spill controls, pre-treatment devices or end-of-pipe controls as part of a multi-component approach for water quality control. They are typically used for small sites but sizing and design are dependent on the function they are to fulfil. Whether separators are to be used as pre-treatment devices or in the overall design as a part of a multi-component system, it is essential to select appropriate equipment based on their demonstrated capabilities. There have been numerous applications of OGS since the 1980s and there are a variety of both proprietary and non-proprietary oil/grit separators on the market ranging from chambered designs to manhole-types.