(a) Sludge pumps.
- (1) Duplicate units. Provide duplicate units.
- (2) Minimum head. Pumps must provide at least 24 inches of positive head.
- (3) Sampling facilities. Provide a means to sample sludge. All sampling pipes and valves must be at least 1.5 inches.
- (b) Sludge piping. Sludge withdrawal piping must be at least 8 inches in diameter for gravity systems and 6 inches for pump suction and discharge lines. A minimum velocity of 3.0 fps for gravity lines is required.
Added at 17 Ok Reg 1140, eff 6-1-00
Amended at 23 Ok Reg 937, eff 6-15-06