Maryland Statutes
Part V - General Provisions
Section 7-229 - Immunity of Persons Providing Assistance in Connection With Release of Hazardous Substances or Materials

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.