(a) Entrance impact control. All wastewater treatment facilities designed to discharge treated wastewater shall provide an outfall sewer pipe to a defined water course. Provide the following when designing outfall lines:
- (1) Dispersion of the effluent across the stream as needed to protect aquatic life; and
- (2) Access for effluent sampling.
- (b) Protection and maintenance. Protect the outfall sewer from the effects of floodwater, ice, or other hazards to reasonably assure its structural stability and freedom from stoppage. Provide a manhole at the shore end of all gravity sewers extending into the receiving waters. Provide at least a 12-inch diameter pipe or appropriate screening for submerged discharges to prevent blockage by aquatic animals.
- (c) Discharge to reservoirs. Proposed discharges within 600 feet of the maximum conservation pool elevation shall extend the line into the reservoir. Anchor the lines to the bottom in such a fashion as to be at least 10 feet below the surface and 100 feet from the water line at the conservation pool elevation.
- (d) Sampling provisions. Design all outfalls with easy access for obtaining effluent samples during all weather conditions at a point after the final treatment process and before it reaches the receiving waters.
Added at 17 Ok Reg 1140, eff 6-1-00
Amended at 23 Ok Reg 937, eff 6-15-06