I have a problem with groundwater ingress into an inspection chamber that links to a septic tank, obviously a problem. The site is pretty saturated and flat, and water I think is coming in through the extension turret on the chamber, which extends down one metre.There is a high water table when it rains a lot. Does anyone know how to fix this problem - the septic tank is not viable with load of ground water going into it.
many thanks
Simon