The requirements in Sector Q apply to stormwater discharges associated with industrial activity from water transportation facilities as identified by the industrial activity code specified in Table 5 of Appendix D.
Permittees under Sector Q are primarily engaged in water transportation facilities and activities classified in SIC Code Major Group 44 that have vehicle (vessel) maintenance shops and/or equipment cleaning operations, including:
a. Water transportation industry, including facilities engaged in foreign or domestic transport of freight or passengers in deep sea or inland waters.
b. Marine cargo handling operations.
c. Ferry operations.
d. Towing and tugboat services.
The following discharges are not authorized by this permit:
a. Bilge and ballast water.
b. Sanitary wastes.
c. Pressure wash water.
d. Cooling water originating from vessels.
a. Employee Training.
The Permittee shall, as part of the employee training program, address the following activities:
1. Used oil management.
2. Spent solvent management.
3. Disposal of spent abrasives.
4. Fueling procedures.
5. Painting and blasting procedures.
6. Used battery management.
b. Erosion and Sedimentation Controls (No additional requirements).
c. Good Housekeeping.
1. The Permittee shall implement and describe a schedule for routine yard maintenance and cleanup. Regularly remove from the general yard area scrap metal, wood, plastic, miscellaneous trash, paper, glass, industrial scrap, insulation, welding rods, and packaging.
2. The Permittee shall describe procedures for routinely maintaining and cleaning the drydock area to prevent or minimize pollutants in stormwater runoff. Address the cleaning of accessible areas of the drydock prior to flooding and following removal of the vessel and raising the dock. Include procedures for cleaning up oil, grease, and fuel spills occurring on the drydock.
3. The Permittee shall regularly clean deposits of abrasive blasting debris and paint chips.
1. The Permittee shall inspect the following areas:
a. Pressure washing area.
b. Blasting, sanding, and painting areas.
c. Engine maintenance and repair areas.
d. Drydock area.
e. General yard area.
2. In addition to the inspection requirements outlined in Part III.G, the Permittee shall ensure that a total of two (2) of the required monthly inspections occur during runoff events, with at least one being performed during snow melt. Each inspection shall include a visual assessment of the runoff to identify any visible sheens or films that indicate the presence of oil or grease in the discharge. If sheens are present in stormwater discharges, corrective actions to prevent sheen shall be implemented and documented in the SWPPP.
The Permittee is only required to conduct visual inspections of runoff originating from, or passing through, areas of industrial activity and/or significant materials. Any runoff that does not contact industrial activity and/or significant materials (e.g. office buildings, employee parking lots, natural areas, etc) is not required to be inspected.
e. Preventive Maintenance.
1. The Permittee shall implement and describe measures to prevent spent abrasives, paint chips, and overspray from coming into contact with stormwater. The Permittee shall contain all blasting and painting activities, or use other measures to prevent the discharge of the contaminants (e.g. hanging plastic barriers or tarpaulins during blasting or painting operations to contain debris).
2. The Permittee shall implement and describe measures to prevent or minimize the contamination of stormwater from all areas used for engine maintenance and repair.
3. The Permittee shall implement and describe measures to prevent or minimize the contamination of stormwater from material handling operations and areas (e.g. fueling, paint and solvent mixing, disposal of process wastewater streams from vessels).
f. Spills and Leaks (No additional requirements).
g. Management of Runoff (No additional requirements).
h. Other Industry Specific Stormwater Controls.
If pressure washing is used to remove paint, dirt, marine growth, or other materials from vessels, the discharge water must be permitted by a separate NPDES permit and is not authorized by this permit.
6. SWPPP Requirements
In addition to the requirements of Part IV, the Permittee shall also comply with the following:
a. Facility Map.
The Permittee shall identify where any of the following may be exposed to stormwater:
2. Engine and vessel maintenance and repair.
3. Pressure washing.
8. Metal fabrication.
9. Locations used for the treatment, storage, or disposal of wastes.
10. Liquid storage areas (e.g. paint, solvents, resins).
b. Inventory of Exposed Materials (No additional requirements).
c. Potential Pollutant Sources.
The Permittee shall describe the following additional sources that have potential pollutants associated with them:
1. Outdoor manufacturing or processing activities (e.g. welding, metal fabricating).
2. Significant dust or particulate generating processes (e.g. abrasive blasting, sanding and painting).
d. Description of Stormwater Controls (No additional requirements).
7. Monitoring and Reporting Requirements
In accordance with the monitoring requirements of Part V, the Permittee shall monitor the applicable parameters in Table Q-1, below:
Sector-Specific Benchmark Values and Effluent Limitations: Sector - Q. Discharges may be subject to requirements for more than one sector or subsector.
Link to this table
|Q1 Water Transportation Facilities||Solids, Total Suspended (TSS)||100 mg/L 2|
|Lead, Total (as Pb)||0.164 mg/L 1|
|Zinc, Total (as Zn)||0.234 mg/L 1|
|Iron, Total (as Fe)||1.0 mg/L|
|Aluminum, Total (as Al)||X1.5 mg/L|
1The benchmark values of some metals are influenced by water hardness. For these parameters, the Permittee may determine the hardness of the stormwater discharges to identify the applicable ‘hardness range’ for determining their benchmark value. See Table 4 of Appendix B for hardness dependent benchmark values in accordance with Minn. R. 7050.0222 and Minn. R. 7052.0100.
2If the Permittee is required to comply with Appendix A, part F.1, the benchmark value for Solids, Total Suspended (TSS) is 65 mg/L, instead of 100 mg/L.
8. Use of Infiltration Devices and/or Industrial Stormwater Ponds for Stormwater Treatment and Disposal
Sector Q industrial facilities are authorized to use designed infiltration devices or industrial stormwater ponds for stormwater management.