Md. Code, Courts and Judicial Proceedings § 3–1202

A motor carrier is responsible for the expense of an emergency response, containment, cleanup, and abatement by a paid fire department if the motor carrier:

(1) Transports a hazardous material in commerce on a highway in the State; and

(2) Is at fault and causes a traffic accident in the State that results in:

(i) A spill or discharge of hazardous materials; and

(ii) An emergency response, containment, cleanup, and abatement by the paid fire department.