The City is completing a project involving the rehabilitation of the City’s public combined sewer lines using the Cured-In-Place Pipe (CIPP) process at locations throughout Evanston. The contractor performing the work is Insituform Technologies. A map showing the locations of the sewer lines to be rehabilitated is attached to this newsletter.

Tentative Schedule:

Sewer lining work is scheduled to take place between Wednesday, April 6 and Wednesday, April 20, weather permitting. Work in the downtown area and in the vicinity of Ridge Ave. and Emerson St. will take place between 8:30 p.m. and 7 a.m. The contractor will work with area residents and businesses to minimize impacts and noise. A notice will be placed on the front doorknob of the affected buildings advising the occupants 24 hours in advance of the specific date and time that the sewer lining work will be performed. This work should take approximately 10-12 hours to complete at each location. If you do not receive a notice, the process will not affect your building. “No Parking” signs will be posted in the area where the rehabilitation work is taking place.

Project Details:

During sewer rehabilitation, a liner is inserted into the public sewer that will seal the building sewer service connection, preventing it from flowing into the public sewer. Consequently, the City requests that if the contractor is rehabilitating the sewer line in front of your building that residents limit water usage (limit use of toilet facilities and refrain from doing laundry or washing dishes). Also, any sump pumps that are connected to the combined sewer system should be disconnected during this period. When installation of the liner is completed, the contractor will reestablish flow from the building sewer service to the public sewer.

Information on Styrene:

The resins used in the lining process have been used in the fiberglass industry for many years. These resins contain a chemical called styrene that hardens when heated. Although styrene has an unpleasant odor, it is not dangerous at the levels at which people can detect it. If you smell the styrene while the contractor’s personnel are working in your area, do not be alarmed. An easy way to prevent the styrene odor from occurring in your building is to pour a gallon of water into each basement floor drain. This keeps the drain “trap” full and prevents sewer gases from coming into your building. Because water in drain traps evaporates over time, this practice should be done regularly.

Contact Information:

This project will be monitored and inspected by the City of Evanston Public Works Agency. Please direct any questions to Kristin Rehg, Senior Project