Updating septic system
Concrete risers are the cheapest (approximately 0), but they’re heavy and can be difficult to install.
A riser made from polyethylene or PVC will typically cost 0 or more, depending on size.
Septic tank risers are commonly made from polyethylene, PVC or concrete.
The Iowa Administrative Code (or IAC) 567-69 sets the State of Iowa wastewater regulations which are adopted by Story County and apply to construction of private sewage disposal systems.