The goal of the inflow and infiltration (I/I) program is to identify and reduce sources of I/I in the sanitary sewer system. I/I is clear stormwater and groundwater that enter the sewer system that should otherwise be collected by a system that allows for the water to infiltrate back into the ground locally. I/I must be removed at the source, before it enters the sewer system, otherwise the clear stormwater and groundwater is conveyed to the Wastewater Treatment Facility (WWTF) where it is processed and treated as wastewater resulting in an overall reduction in sewer system capacity and increased operating costs for treatment.
The Town uses multiple inspection methods to identify I/I in the sewer system, and sources of I/I that are found during these inspections are prioritized for repair. Repairs to reduce I/I include sealing leaking pipe joints, lining pipes with cracks or holes, and lining leaking manholes with cement to stop the infiltration of groundwater. Whenever feasible, the Town attempts to fix I/I sources using trenchless methods, meaning excavation is not required to perform the repairs. When these methods are not feasible, excavation of the ground is required so the pipes can be replaced.
Smoke testing is an inspection method used to locate sources of I/I to the sanitary sewer system. During this smoke testing, harmless white smoke is introduced into portions of the sanitary sewer system via a smoke-generating machine. While the test is being conducted white smoke will be visible venting from holes in manhole covers located on the street, and from plumbing vent pipes located on or near a building’s roof surface in the test area.
Smoke testing is scheduled to begin on November 12, 2019
If your home or business is located in the vicinity of an upcoming smoke testing area, your will receive a notice, which crews will deliver by going door to door approximately 24 to 48 hours in advance of the testing. Police, Fire and the Public Works Division will also be notified daily of work area.
Testing will occur along all or portions of the following streets and adjoining streets: