Md. Code, Environment § 9–1003

(a) The Department shall:

(1) Adopt rules and regulations to carry out the provisions of this subtitle;

(2) Establish a proficiency testing program to test the performance of any water quality laboratory; and

(3) Set standards for:

(i) Demonstrating satisfactory performance in a proficiency testing program; and

(ii) Conducting the program.

(b) The Secretary shall have each water quality laboratory inspected at least triennially.