(a) An underground or aboveground storage tank is exempt from regulation under this subchapter if the tank is:
(1) a farm or residential tank with a capacity of 1,100 gallons or less used for storing motor fuel for noncommercial purposes;
(2) used for storing heating oil for consumptive use on the premises where stored;
(3) a septic tank;
(4) a surface impoundment, pit, pond, or lagoon;
(5) a storm water or waste water collection system;
(6) a flow-through process tank;
(7) a tank, liquid trap, gathering line, or other facility used in connection with an activity associated with the exploration, development, or production of oil, gas, or geothermal resources, or any other activity regulated by the Railroad Commission of Texas pursuant to § 91.101, Natural Resources Code; or
(8) a transformer or other electrical equipment that contains a regulated substance and that is used in the transmission of electricity, to the extent that such a transformer or equipment is exempted by the United States Environmental Protection Agency under 40 C.F.R. part 280.
(b) A storage tank is exempt from regulation under this subchapter if the sole or principal substance in the tank is a hazardous substance and the tank is located:
(1) in an underground area, including a basement, cellar, mineworking, drift, shaft, or tunnel; and
(2) on or above the surface of the floor of that area.

(c) An interstate pipeline facility, including gathering lines, or an aboveground storage tank connected to such a facility is exempt from regulation under this subchapter if the pipeline facility is regulated under 49 U.S.C. § 60101 et seq. and its subsequent amendments or a succeeding law.
(d) An intrastate pipeline facility or an aboveground storage tank connected to such a facility is exempt from regulation under this subchapter if the pipeline facility is regulated under one of the following state laws:
(1) Chapter 111, Natural Resources Code;
(2) Chapter 117, Natural Resources Code; or
(3) Subchapter E, Chapter 121, Utilities Code.
(e) Except for § 26.351 of this subchapter, in-ground hydraulic lifts that use a compressed air/hydraulic fluid system and hold less than 100 gallons of hydraulic oil, if exempt by the federal Environmental Protection Agency, are exempt under this subchapter.
(f) An aboveground storage tank that is located at or is part of a petrochemical plant, a petroleum refinery, an electric generating facility, or a bulk facility as that term is defined by § 26.3574(a) of this code is exempt from regulation under this subchapter but is not exempt for purposes of the fee imposed under § 26.3574 of this code.
(g) Costs incurred as a result of a release from a storage tank system owned, operated, or maintained by a common carrier railroad are not reimbursable pursuant to the provisions of this section. Common carrier railroads are exempt from the fees collected pursuant to the provisions of this Act.