The following classes of underground storage tanks or systems are specifically excluded from all provisions of this Chapter:

1. (1) Farm and residential tanks with an individual capacity of 1,100 gallons or less used for storing regulated substances for non-commercial purposes.
2. (2) Tanks used for storing heating oil for consumptive use on the premises where stored.

3. (3) Pipeline facilities (including gathering lines) regulated under:

   1. (A) The Natural Gas Pipeline Safety Act of 1968 (49 U.S.C. App., § 1671 et seq.);
   2. (B) The Hazardous Liquid Pipeline Safety Act of 1979 (49 U.S.C. App., § 2001 et seq.); or
   3. (C) Intrastate pipeline facilities regulated under State law comparable to the provisions of law referred to in (A) or (B) of this paragraph.
4. (4) Flow-through process tanks.
5. (5) Liquid trap or associated gathering lines directly related to oil or gas production and gathering operations.
6. (6) Tanks with a capacity of less than 110 gallons.
7. (7) Tanks storing diesel fuel at plants regulated by the Atomic Energy Commission.
8. (8) Any emergency spill or overflow containment UST system that is expeditiously emptied after use.

Amended at 11 Ok Reg 3705, eff 7-11-94

Amended at 18 Ok Reg 2378, eff 7-1-01

Amended at 25 Ok Reg 1867, eff 7-1-08

Amended at 35 Ok Reg 985, eff 10-1-18