SECTION 252:656-9-3. Plant outfalls

(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.

[Source: Added at 17 Ok Reg 1140, eff 6-1-00; Amended at 23 Ok Reg 937, eff 6-15-06]