Mich. Admin. Code R. 323.1215
Rule 1215. Conditions shall be established in national pollutant discharge elimination system (NPDES) permits that require the permittee to monitor for BCCs expected to be present in the discharge as a result of operations at the facility. The permit shall also contain a provision, consistent with R 323.1098, that prohibits the permittee from undertaking any action that would result in a lowering of water quality from an increased loading of a BCC unless an increased use request, including an antidegradation demonstration, has been submitted and approved by the department. The permit shall also require that the department be notified within 10 days of the permittee becoming aware that a lowering of water quality from an increased loading of a BCC has occurred.
Mich. Admin. Code R. 323.1215