From October 16th through October 18th, NapaSan will be conducting smoke testing of sanitary sewer lines in neighborhoods throughout town. Please see the map here for testing locations. These tests will start no earlier than 8:00 a.m. and will be completed by 5:00 p.m.
These types of tests are routinely performed as part of the comprehensive long-term sewer system improvements program. The test involves blowing smoke into a sewer manhole to find places where storm water may be entering the system, as well as to assist in locating breaks and defects that may exist in the sewer lines.
During the test, white smoke may be seen coming from roof vents, up through the ground, building foundations, or manhole covers. The smoke will not enter your home if it is properly plumbed and vented and the water traps contain water. In order to ensure your traps are filled with water, run the faucets and showers in your home for 30 seconds and pour 12 ounces of water into any floor drains. The smoke used is not harmful to people, pets, or furnishings. It is non-toxic, non-staining, non-corrosive, odorless, and leaves no residue. Your presence at home is not required during the test. Both police and fire departments will be kept informed of the areas in which the testing will take place. Any smoke in the area from the testing should clear within ten minutes.
All properties on the streets where the smoke testing will happen and areas surrounding those streets have been notified via mail so that everyone in the immediate area is aware of the testing. Napa San's consultant, V&A Consulting Engineers, will deliver door hangers to the properties directly within the testing area 24 to 48 hours before testing takes place.
If you have any questions, please contact NapaSan at (707) 312-1589 or V&A at (510) 987-8113. Para información en español, llame al (707) 258-6000.