Ryan Marine Services, Inc. (RMS) operates a boat and engine repair and storage facility located in Marblehead, Massachusetts. RMS discharges stormwater into Marblehead Harbor through Marblehead's Municipal Separate Storm Sewer System. RMS has also been discharging process wastewater, including from its pressure washing, boat cleaning, and engine testing operations, into Marblehead Harbor without a permit. On April 18, 2019, Region 1 issued a compliance order to RMS requiring it to cease discharging process wastewater, and to comply with its newly issued Multi-Sector General Permit for Stormwater Discharges Associated with Industrial Activities (MSGP). RMS did not produce documentation of quarterly routine facility and visual outfall inspections, perform quarterly benchmark monitoring, and submit electronically annual reports, as required by the MSGP.