Md. Code, Environment § 9–342.2

(a) A person who discharges a pollutant into the waters of the State in violation of § 9–322 or § 9–323 of this subtitle shall reimburse the Department for the reasonable costs incurred by the Department in conducting environmental health monitoring or testing, including the cost of collecting and analyzing soil samples, surface water samples, or groundwater samples for the purpose of assessing the effect on public health and the environment of the person’s discharge.

(b) The Department may recover costs that are reimbursable under subsection (a) of this section in a civil action.