Tex. Health & Safety Code § 361.754
This subchapter does not limit the right of an innocent owner or operator to pursue any remedy available at law or in equity for conditions attributable to the release or migration of contaminants from a source or sources that are not located on or at the property.
Added by Acts 1997, 75th Leg., ch. 793, Sec. 15, eff. Sept. 1, 1997.