Maryland Code, Environment § 2-604

(1) Specify the provision that allegedly has been violated;

(2) Describe the nature and extent of the alleged violation;

(3) Require corrective action within a time specified in the order; and

(4) State that the person charged will receive a hearing if the person requests the hearing within 10 days after service.

(1) As a summons is served under the Maryland Rules; or

(2) By certified mail.

(1) Hold a hearing within 20 days after the request is made; and

(2) Give the person written notice of the date, time, and place of the hearing, at least 10 days before the hearing date.