9-23-2024: Did a video inspection of the underground duct work for dusty smell, separations at concrete slab to pipe at all register need to be filled with hydraulic cement and encapsulate all underground duct work. A coil would need to be removed for access to plenum box under furnace. We epoxy coated kitchen line in May of 2024 no sewer smell or water present since. N/C on duct televising per BS. Get quote to encapsulate transite ducts under slab.