Step 4: Create SWPPP, choose BMPs

What is a Stormwater Pollution Prevention Plan (SWPPP)?

The Stormwater Pollution Prevention Plan (SWPPP) is your plan and guide to understanding and managing stormwater runoff. 

Review the requirements of the SWPPP

Permittees must create, implement and maintain  the SWPPP. Updates to the SWPPP are required before applying for permit coverage or permit modification.

  1. Include information about compliance with Stormwater Control Measure requirements.
  2. Provide a facility description.
  3. Include facility map(s).
  4. Provide a facility assessment of activities and materials.
  5. Include modification requirements-review SWPPP annually and document modifications.
  6. Availability requirements: Make sure the SWPPP is available to the MPCA upon request.
  7. Reporting requirements: Submittals reflect conditions and changes in the annual report.
  8. Identify qualified personnel who are responsible for the implementation and management of the SWPPP.
  9. Include a section dedicated to mobile activities (if applicable).
  10. Include additional sector-specific SWPPP requirements.
  11. List personnel appropriately trained to conduct inspections.
  12. Include records of all inspections conducted.
  13. Include information pertaining to maintenance to Stormwater Control Measures.
  14. Document the elimination of unauthorized non-stormwater discharges.
  15. Include documentation of Spill Prevention and Response Plan.
  16. Include the Mercury Minimization Plan (if applicable).
  17. Include Employee Training Program information.

Utilize MPCA’s guidance tools to create or update your SWPPP

Choose best management practices (BMPs)

How do I choose BMPs?

There are 3 different types of BMPs you may choose to implement at your facility:

  • Non-structural BMPs (good housekeeping, moving products/wastes indoors, etc.)
  • “Off-the-shelf” structural BMPs (simple, easy-to-install BMPs)
  • Structural BMPs (more complex, may take time and/or money to install)

Things to keep in mind as you review the suggestions:

  • Are the BMPs appropriate for my facility size/industrial activity/significant material?
  • Are the BMPs I’ve chosen the most cost effective to install?
  • Is there another BMP that is simpler/cheaper to get the job done?
  • Does the BMP have to be maintained and do I have the staff/time to maintain it?
  • Is there something I can do to eliminate (prevent) precipitation from coming in contact with my industrial activity/significant material in the first place?

Consider simple structural BMPs. The Minnesota Erosion Control Association has a list of structural BMPs and companies that install them.

Start with the simple BMPs first, such as moving materials indoors or under cover.

Many of the recommendations in Step 2: No Exposure will be helpful as non-structural BMPs and simple structural BMPs. Remember, non-structural BMPs must be implemented before applying for permit coverage; facilities have the first full year after applying to implement structural BMPs.

Additional guidance documents

Go to Step 5