Okla. Admin. Code § 165:26-2-32

Current through Vol. 42, No. 4, November 1, 2024

Section 165:26-2-32 - Secondary containment

(a) Aboveground storage tanks, other than those with double walls as set out in 165:26-2-31, must have secondary containment for the fuels stored in them.

(b) Multiple products stored within the same containment area must be compatible with each other.

(c) If the secondary containment area is open to precipitation, it must be able to contain 110 percent of the capacity of the largest tank plus the volume displaced by other tanks within the containment area.

(d) The secondary containment area must be constructed with materials that are compatible with the product being stored.

(e) The secondary containment area cannot have any uncapped drain that extends outside of the containment.

(f) The secondary containment must be kept intact and free of vegetation, trash, water, and all other items not necessary for fuel storage.

(g) Secondary containment can be made from native soil if the soil meets or exceeds the permeability rates listed in Appendix J, or it can be made of concrete or steel. Generally, soil containment may be preferred in open rural areas and concrete in more congested urban areas. In either case the secondary containment must be impermeable for the products stored in the tanks:

(1) When concrete is used for secondary containment the concrete must be suitable to contain the released product for as long as it would take to recover the release.

(2) Soil containment not meeting the permeability rates listed in Appendix J must be made impermeable by use of a synthetic membrane liner made of rubber, plastic, or a geosynthetic clay liner.

(3) A double-walled tank would meet the criteria of secondary containment.

Okla. Admin. Code § 165:26-2-32

Added at 21 Ok Reg 2079, eff 7-1-04; Amended at 23 Ok Reg 144, eff 10-6-05 (emergency); Amended at 23 Ok Reg 2297, eff 7-1-06