If there is smoke in the resident's yard, does that mean the cause of the leak needs to be dug up?
In a worst-case scenario, yes, but there are many other solutions, such as disconnecting the drain or lining a portion of the house lateral without an excavation.

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1. What is the benefit to my city for performing a Smoke Test?
2. What exactly is a Smoke Test?
3. How will my residents know when Smoke Testing will be performed in their neighborhoods?
4. How are Sewer Division crews recognizable in the field?
5. Is the smoke that you use hazardous?
6. Do my city's residents have to do anything to prepare their homes for Smoke Testing?
7. What if smoke comes out of a resident's yard or driveway?
8. If there is smoke in the resident's yard, does that mean the cause of the leak needs to be dug up?
9. Does the resident need to be home when the Smoke Testing is performed?
10. What if a test yields no smoke defects?