As a part of efforts to reduce clear-water entry into the sanitary sewer system, testing of the sewers will be conducted in this area. Each section of the sanitary sewer will be examined for sources of clear-water entry into the system. During the examination, a dense grayish/white smoke will be blown through the sanitary sewers from a manhole. Smoke will then appear from any roof drains, catch basins or house vent stacks connected to the system. In addition, the smoke may appear from cracks in the pavement above the sewer, from lawns, or around homes which have foundation drains connected to the sewer. The appearance of smoke from house vent stacks is normal, and does not indicate a defect in the plumbing.
Smoke may also appear in basements by means of unused floor drains,
disconnected or faulty plumbing fixtures, or any direct opening to the
house lateral. To reduce this possibility, pour a bucket of water down
all floor drains, sinks or other plumbing fixtures. This water will fill
the plumbing trap and prevent the entry of smoke.
used for the tests is non-staining and will disappear rapidly without
leaving a residual odor. If smoke should appear in your building during
the test, leave the building and contact a member of the survey team
working your street. The smoke will dissipate quickly if a window or
door is opened.
It takes only a few minutes to test an average block, and it is not necessary for you to be home during the testing period.
The smoke used in this program has been analyzed by a team of experts
in the field of industrial hygiene, toxicology and medicine and has been
proven harmless. Although harmless, the smoke may irritate nasal
passages but irritation should disappear quickly after exposure has
ended. Those persons suffering from heart or lung diseases, such as
emphysema, should attempt to avoid exposure as they would any other
potential airborne irritant.
Sewer smoke testing will be done
the week of ____________________. Testing will not take place in
inclement weather. If you have any questions, please contact: