Massive Renovation project going on Next Door complete with 1st Floor Raised and Basement Added.. My Query comes because of our Cold Canadian Winters in Eastern Ontario.. They've Backfilled to the Foundation raising the area above where the Septic Tank presently sits a good 3ft. They've put what looks like a 45 gallon drum over each of the cement tank lids for access to the Lids, their exposed.. Thoughts Opinions , Curious is All..