SECTION 165:26-2-5.1. General spill and overfill prevention requirements

(a)   Owners and operators of aboveground storage tank systems, their employees or agents, as well as those who transport regulated substances to these systems must do everything reasonably possible to ensure that releases due to spilling and overfilling do not occur.

(b)   Tanks with a fill pipe must be filled through a liquid tight connection mounted inside at least a five (5) gallon spill container. A spill bucket is not required if the fill pipe is located within an impervious containment dike. Where an aboveground tank is filled by means of fixed piping, either a check valve and shutoff valve with a quick-connect coupling or a check valve with a dry-break coupling shall be installed in the piping at a point where connection and disconnection is made inside the spill containment between the tank and the delivery vehicle. This device shall be protected from tampering and physical damage. Tampering with equipment is prohibited. Any violation of this section may result in fines, enforcement action and/or shutdown of operations.

(c)   For existing aboveground storage tank systems installed before October 13, 2018, any one of the following methods must be used to prevent overfilling.

(1)   High liquid level alarms with an audible or visual signal that alerts personnel when the tank reaches ninety percent (90%) capacity at a constantly attended operation or surveillance station.

(2)   High liquid level pump cutoff devices set to stop flow at a predetermined container content level.

(3)   Direct audible or code signal communication between the tank gauger and the pumping station.

(4)   A fast response system for determining the liquid level of each bulk storage container such as digital computers, telepulse, or direct vision gauges. If this alternative is used a second person must be present to monitor gauges and the overall filling of the tank.

(d)   For installations after October 13, 2018, a fill valve which automatically stops delivery of liquid when the tank reaches ninety-five percent (95%) capacity in addition to one of the following methods must be used to prevent overfilling.

(1)   High liquid level alarms with an audible or visual signal that alerts personnel when tank reaches ninety percent (90%) capacity at a constantly attended operation or surveillance station.

(2)   Direct audible or code signal communication between the tank gauger and the pumping station.

(3)   A fast response system for determining the liquid level of each bulk storage container such as digital computers, telepulse, or direct vision gauges. If this alternative is used, a second person must be present to monitor gauges and the overall filling of the tank.

(e)   Liquid level sensing devices must be tested at least annually to ensure proper operation.

(f)   Means shall be provided for determining the liquid level in each tank and this means shall be accessible to the delivery operator. Tank filling shall not begin until the delivery operator has determined that the tank has sufficient available capacity (ullage).

[Source: Amended and renumbered from 165:26-3-21 at 23 Ok Reg 2297, eff 7-1-06; Amended at 25 Ok Reg 2187, eff 7-11-08; Amended at 32 Ok Reg 794, eff 8-27-15; Amended at 34 Ok Reg 958, eff 9-11-17; Amended at 35 Ok Reg 1010, eff 10-1-18; Amended at 36 Ok Reg 576, eff 8-1-19; Amended at 37 Ok Reg 1143, eff 10-1-20]