The City of Graham Utilities Department will be conducting non-toxic smoke testing of the sanitary sewer system during the hours of 7:00 am -6:00 pm Monday through Friday from February 10 to May 10, 2020. The focus of this study will be the sanitary sewer systems
located alongside and in the vicinity of Boyd Creek. The sewer infrastructure that will be included is anticipated to cover the area bounded by Interstate 40/85 to the South, Hanover Road to the North, Main Street (NC 87) to the East, and Maple Avenue to the West.
The project will involve opening manholes in the streets and along public easements. These easements may be located at the back or side of properties. Clearing of vegetation along some easements to facilitate access may be performed if needed.
A non-toxic smoke will be blown into the sewer pipes to locate breaks and defects in the sewer system. Staff does not anticipate the vapor will enter homes and businesses; however, smoke may be seen coming from holes in the ground, clean out stacks in yards, or vent stacks on the roof of buildings and homes. The smoke should not enter your home unless the plumbing is defective or drain traps have dried up. If you have any seldom used drains, pour water into the drain to fill the trap.
If smoke is observed, you may contact our contractor, Alley, Williams, Carmen, and King, Inc., Representative, Brent Mills at (336)-260-6760 and he or a City of Graham Representative will assist in identifying the source of the smoke. If possible, please call while the smoke testing is in progress to enable the representative to identify the source of the smoke.
Smoke testing cause
Aging infrastructure and cross connections are two of the largest contributors to Inflow and Infiltration (I/I) within a sewer system. I/I is one of the main contributors in sanitary sewer overflows and elevated treatment costs during wet weather conditions. Smoke testing identifies holes, cracks or other compromises of the sewer collection system that contributes to Infiltration and Inflow of storm water. Infiltration and Inflow increases the likelihood of a release of untreated wastewater and taxes the entire system.
Smoke testing is being performed in the vicinity of Boyd Creek’s existing sewer system to help identify potential sources of I/I for pipe rehabilitation or replacement. Repair of items will help reduce the likelihood of sanitary sewer overflows and the increase in flow at the waste treatment plant thus helping to reduce elevated treatment costs.