Evanston, Ill., begins sewer line rehabilitation project using CIPP trenchless technology
(UI) — The City of Evanston has begun work on a multi-month sewer rehabilitation project using the Cured-In-Place Pipe (CIPP) trenchless method. Sewer cleaning and inspection started on March 25, with pipe lining scheduled to begin in May, weather permitting.
The project will rehabilitate portions of the city’s public combined sewer lines and is expected to wrap up by Aug. 31. Work involves inserting a liner into the public sewer to seal building sewer service connections and prevent excess flow into the system.
The contractor performing the work is National Power Rodding Corp.
Residents and business owners in affected areas are asked to limit water usage while lining work is underway in front of their buildings. That includes refraining from laundry, dishwashing, and excessive bathroom use. Any sump pumps connected to the combined sewer system should be disconnected during this time.
Once lining is completed, the contractor will restore flow between private building connections and the public sewer.
Contract crews will coordinate with property owners to minimize disruptions and noise. Businesses will receive direct communication in advance of work, while residents will get both 10-day and 24-hour notices before lining begins. Parking restrictions will be posted when necessary.
The lining process uses a resin that contains styrene, a chemical common in fiberglass work.
“Although styrene has an unpleasant odor, it is not dangerous at the levels at which people can detect it,” city officials stated.
To reduce the chance of odor entering homes or buildings, residents are advised to pour a gallon of water into each drain—especially basement floor drains—to keep sewer gas traps filled.
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