Texas Utilities Code - UTIL § 251.003. Exemptions

(1) an aboveground or underground storage tank, sump, or impoundment or piping connected to an aboveground or underground storage tank, sump, or impoundment located in the same tract of land as the storage tank, sump, or impoundment;

(2) an underground facility operated by the owner of a secured facility and located entirely within the secured facility;

(3) an underground facility that serves only the owner of the underground facility or the owner's tenant and that is located solely on the owner's property;

(4) piping within a well bore;

(5) the portion of an exploration and production underground facility that is located within the boundaries of the oil or gas field from which the oil and gas is produced and that is not located in the boundaries of an established easement or right-of-way granted for the benefit of a governmental entity or a private entity if the easement or right-of-way is granted for a public purpose; or

(6) an underground facility that serves a cemetery and is located solely on the cemetery's property.