Here are the answers to O&M Quiz No. 2.1. T or F - Settling around the riser of a new septic tank may be a result of a leaking riser/tank seam and should be investigated.
Answer: True. It should be investigated to determine the cause. One possibility is that it was not properly set to be watertight, allowing water and associated soil to wash into the system. Left unchecked, the excess water can result in hydraulic overloading of the system. There are other possible explanations such as natural settling, since the backfill was not compacted around the riser. The problem should be fixed to
