Okla. Admin. Code § 252:641-9-1

Current through Vol. 42, No. 8, January 2, 2025

Section 252:641-9-1 - General provisions

(a)Primary settling. All sewage entering a pump tank (i.e., a lift station or a flow equalization tank) must first pass through a septic tank or a trash tank for primary settling.

(b)Pump tank design and construction. Pump tanks shall:

(1) be constructed to prevent sewage from leaking out of the tank and to prevent the infiltration of water into the tank;

(2) when made of concrete, meet the requirements of 252:641-7-2(a);

(3) have no more than one inch (1) variation in elevation from side to side and end to end;

(4) have a manhole opening of at least twenty inches (20") in diameter or, if rectangular, having no side less than twenty inches (20") in length. The manhole cover shall have a lock, locking bolt, or some type of tamper-resistant fastener, or require tools for removal. The manhole opening shall extend a minimum of two inches (2") above ground elevation and shall use a riser safety screen system;

(5) have a threaded union installed in the discharge line located within eighteen inches (18") of the manhole opening so that the pump can be removed without entering the pump tank; and

(6) have a check valve installed in the discharge line after the threaded union. The check valve shall be the same diameter as the discharge line.

(c)Pump design. Pumps shall be:

(1) designed to pump sewage or other liquid containing fine particles/suspended solids; and

(2) rated to pump at least the average daily flow the required distance and elevation.

(d)Prevention of back siphoning. Pump discharges shall flow through a structure or device that prevents the back siphoning of wastewater to the pump tank.

(e)Example. Appendix J illustrates the requirements for a pump tank.

Okla. Admin. Code § 252:641-9-1

Added at 16 Ok Reg 1895, eff 6-11-99; Amended at 21 Ok Reg 1618, eff 6-11-04; Amended at 25 Ok Reg 2318, eff 7-11-08

Amended by Oklahoma Register, Volume 37, Issue 24, September 1, 2020, eff. 9/15/2020

Amended by Oklahoma Register, Volume 41, Issue 23, August 15, 2024, eff. 9/15/2024