Monday, February 22, 2010

Ship - Boat Building & Repair Sector Requirements in MN

The Minnesota Pollution Control Agency (MPCA) has issued its revised multi-sector industrial stormwater discharge general permit (MSGP). This permit will replace the existing industrial stormwater permit, which expired in October of 2002.

[Read a summary of the overall Minnesota permit, stormwater monitoring, and sector requirements]

All manufacturing, industrial and “industrial-like” sites that require a permit to discharge stormwater will be required to come into compliance with the revised permit, and to submit an application for permit coverage between June and October 2010, depending on their industrial sector.

Click here to review a list affected industrial sectors and application deadlines for each sector

The revised Minnesota permit details requirements for 29 different industrial sectors. The requirements described below are for the Ship and Boat Building and Repair Yards Sector (Sector R). Sector R facilities are engaged in a manufacturing of boats as well as boat repair operations These requirements are in addition to permit requirements that apply to all sectors.

Employee Training:
In addition to other training requirements, employee training programs need to include training:
1) used oil management,
2) spent solvent management,
3) disposal of spent abrasives,
4) fueling procedures,
5) painting and blasting procedures, and
6) used battery management.

Good Housekeeping:
The facility SWPPP must address measures to address housekeeping in yards and dry dock areas.

In addition to routine inspection requirements, the operation must conduct two of the monthly inspections during runoff events. One of the inspections must be performed during a snow melt runoff event. Each inspection must 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.

Routine site inspections must include pressure washing area; blasting, sanding, and painting areas; engine maintenance and repair areas; drydock area; and general yard areas.

Preventive Maintenance:
The site SWPPP must include measures to prevent spent abrasives, paint chips, and overspray from coming into contact with stormwater. The operation must contain all blasting and painting activities, and must regularly clean deposits of abrasive blasting debris and paint chips. The SWPPP must describe measures to prevent or minimize the contamination of stormwater from all areas used for engine maintenance and repair

Potential Pollutant Sources:
The site SWPPP must also describe potential pollutant sources including outdoor manufacturing or processing activities, and significant dust or particulate generating processes.

Stormwater Monitoring Benchmarks:
All facilities are required to conduct visual and chemical (benchmark) monitoring. The benchmark concentrations or values are:

TSS 100 mg/L

[Read more about how benchmarks are used under the revised MPCA industrial permit]
[Read more about what a 100 mg/L benchmark for TSS relates to]

Looking for other sector information?
Click here for a link to all sector requirements

Caltha LLP provides expert consulting services to public and private sector clients in Minnesota to address Stormwater Permitting & Regulatory Support, Stormwater Pollution Prevention Plans (SWPPP), Stormwater Monitoring and Stormwater Training.

For further information contact Caltha LLP at
Caltha LLP Website

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