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City of Rossland




July 17, 2018


Dear Resident/Business,


The City of Rossland has contracted C3 Mainline Inspections Inc, through ISL Engineering Services to conduct Smoke / Vapour testing of sanitary sewer mains throughout the City. 

Testing will be conducted in your area between:


July 23, 2018 thru to July 27, 2018


It may be necessary for our field crew to enter your yard to perform this work. Your presence during these inspections is not necessary.


Vapour Testing


Vapour testing will help to identify possible leaks in the sewer system, which is a very important part of keeping the system running efficiently. The vapour you see coming from the sewer vent stacks on houses or holes in the ground is non-toxic, non-staining, white to gray in colour and creates no fire hazard. If you see vapour in and around your neighborhood when our crews are in the vicinity, please do not be alarmed. The RDKB Fire Department has been notified of our work to help prevent false alarms.


Ø  Important!   Although the vapour is non-toxic, it could cause irritation to any individuals in your home or business who have respiratory problems and are immobile. Please notify us as soon as possible if you have any respiratory problems. 


Vapour can sometimes enter your house. To prevent this, it is advised that you pour approximately ½ liter of water into your floor drains in basement floors & run a small amount of water into any sink or other fixture that may have not been used for a long period of time. This will fill the trap & should prevent any vapour from getting into your house.

If you detect vapour in your house or have any questions please contact:


C3 Mainline Inspections' staff at 1-877-744-2288 or 1-250-815-5775 or 1-250-815-1018.


If you have any questions or concerns regarding this letter or the work outlined above, please feel free to contact:


Sean Annan, P.Eng. |  Manager, West Kootenay Office/Project Engineer
ISL Engineering and Land Services Ltd.

T: 250.362.2229   C: 250.609.0347


City of Rossland contact: Darrin Albo, Manager of Operations 

Phone: 250-362-7396 ext. 1237         Email: