Suction Point
When conducting sub-slab diagnostics on a system installed 3 years prior in a real estate transaction, it was found that there was positive pressure under the slab relative to the basement. I used an endoscope to look inside the riser and found that there was no dirt excavated.
Radon Fan
The previous installed radon mitigation system.
New System Installed
Although the previous system was installed in 2021, it was replaced because it was out of compliance and non-functioning. Pictured is the new system.