Ontario's Ministry of the Environment recommends that home buyers have a septic system inspected prior to finalizing a sale on a property. This condition may also be requested by your financial institution. A time of sale inspection may help protect you against future unexpected costs. The inspection process might involve pumping the tank and examining the leaching bed for any signs of problems. A septic system inspection may be conducted by a licensed septic system installer, a licensed sewage hauler or a professional engineer.