WQ0004332_Permit Compliance Schedule Submittal_20220125

Town of Edenton
WQ0004332
Residual Management Plan
The Town of Edenton operates a Wastewater Irrigation System with a design flow of 1.076 MGD.
The stabilization/storage lagoon is 28 acres. As wastewater enters the lagoon, solids will settle to
the bottom of the lagoon. The accumulated sludge at the bottom of the lagoon will be anaerobically
digested and stabilized. This digestion process will reduce the volume of sludge buildup. The
depth of solids over the bottom of the lagoon will be varied due to factors such as wastewater
velocity, stratification, flow patterns and other influences. It is expected that the largest buildup
of solids will be near the influent.
The sludge depth in the lagoon will be monitored and once the accumulation has a negative impact
on operations, arrangements will be made for the removal and disposal of the sludge. The Town
will contract with an outside vendor for the removal and disposal of residuals. Representative
samples of the residuals will be analyzed for state/federal required parameters prior to removal.
Sludge removal from the lagoons is usually accomplished by dredging. Depending on the
contracted vendor, the solids will be either:
• dewatered onsite and the dried solids can be landfilled, composted or land applied; or
• pumped into tanker for disposal via liquid land application.
The vendor will be responsible for obtaining any required permits to comply with all state, federal
and local regulations.
The irrigation system has a lagoon effluent screening basket. The effluent from the lagoon passes
through this basket prior to spraying. When the basket is blinded with non -biodegradable solids,
it is removed, allowed to dry and the solids are burned off.

Mr
IAI