Maryland Environment Section 7-229

      A person who is called on for assistance in an emergency has the immunity from civil liability or penalty described under § 5-617 of the Courts and Judicial Proceedings Article as a result of assistance or advice rendered in:

            (1)      Mitigating the effects of an actual or threatened discharge of a hazardous substance or material;

            (2)      Preventing a discharge of a hazardous substance or material;

            (3)      Cleaning up a discharge of a hazardous substance or material; or

            (4)      Attempting any of the acts in this subsection.