Maryland Courts and Judicial Proceedings Section 5-617

      (a)      In this section, "discharge" includes leakage, seepage, or other release of a hazardous substance or material.

      (b)      Except as provided in subsections (c) and (d) of this section, a person who is called on for assistance in an emergency is not subject to any civil liability or penalty 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.

      (c)      The immunity provided in subsection (b) of this section does not apply to a person:

            (1)      Whose act or omission was the original cause of an actual or threatened discharge in whole or in part, and who would otherwise be liable for the act or omission; or

            (2)      Who received compensation other than reimbursement for out-of-pocket expenses for rendering the assistance or advice.

      (d)      Notwithstanding subsection (b) of this section, a person is liable for damages caused by that person's gross negligence or reckless, wanton, or intentional misconduct.