Maryland Code, Environment § 2-610

(a) A person who violates any provision of this title or any rule, regulation, or order adopted or issued under this title is liable for a civil penalty not exceeding $25,000, to be collected in a civil action in the circuit court for any county. Each day a violation continues is a separate violation under this section.

(b) If the Attorney General concurs, the Secretary may compromise and settle any claim for a civil penalty under this section.

(c) If, within 36 months after a civil penalty is compromised and settled under subsection (b) of this section, the person against whom the penalty is imposed satisfies the Secretary that the violation has been eliminated or the order has been satisfied, the Secretary, with the concurrence of the Attorney General, may return to the person not more than 75 percent of the amount of the penalty paid.