September 2018 Industrial Stormwater News

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Industrial Stormwater News

Welcome to the Industrial Stormwater Program, September 2018 Newsletter! 

In this issue:

Featured article: September 13: next U of M training workshop


Registration closes September 6!

The University of Minnesota is offering another permit overview workshop. This training opportunity will take place on September 13 at the MnDOT Training and Conference Center (also called the Arden Hills Training Center), located in Shoreview, MN. Register today; this class will fill up soon!

IS2202 - Industrial Stormwater Regulations, SWPPPs, Sampling and Monitoring

Date/Time: September 13, 8am – 4:30pm.

Location: MnDOT Training and Conference Center, 1900 County Road I West, Shoreview, MN 55126

Registration Fee:  $170

This is our most popular workshop! It is a full-day event that will cover topics including permit basics, development and implementation of stormwater pollution prevention plans (SWPPP), stormwater monitoring, and best management practices for SWPPP modification.

Topics include:

  • SWPPP requirements
  • SWPPP implementation
  • Stormwater monitoring, sampling and reporting requirements
  • Annual reporting and fees
  • ISW case studies
  • Compliance & enforcement

Visit the U of M's Erosion and Sediment Management Certification Program webpage for more information or to register. You can register online or view and fill out the paper registration form.

2020 general permit reissuance, an update


Industrial stormwater program staff have been reviewing the EPA’s and other states’ general industrial stormwater permits and comparing their permit language against our 2015 general permit. Staff are considering various language changes for increased environmental protection purposes, to make the wording easier to understand, and to make permit compliance more practical and effective for permittees. Staff are refining suggested future changes and have eliminated other proposed changes after team discussions. For example, the team explored the option of adding a 30th sector of industrial activity, “Sector AD,” a catch-all sector that allows our agency to require permit coverage of facilities not fitting within the other 29 industrial sectors. Ultimately, the team felt that the current mechanisms of stormwater protection are sufficient at this time and a 30th sector will not be included in the draft 2020 permit.

Key dates for the general permit reissuance process:

  • May - September 2018: Review existing permit language, review EPA's general permit, draft list of suggested changes.
  • October - December 2018: Draft changes.
  • January 2019: Finalize draft permit language.
  • February 2019: Public notice of draft permit.
  • March - May 2019: Review, respond to comments.
  • May 31, 2019: Permit language finalized.
  • June 30, 2019: Permit language approved by EPA, MPCA Commissioner.
  • July 5 - October 5, 2019: Permittees apply for coverage. Permittees must apply 180 days before April 5, 2020.
  • April 5, 2020: “New” permit is reissued and effective.

List of suggested changes, by topic:


  • Consider having an “I’m done sampling” form or similar requirement for sampling “closure.” The goal is to regain electronic system to show sampling results and averages online; this addition may not be needed.
  • Clarify hardness-dependent adjustment language. Language and requirements should reflect “receiving waters” and not “hardness of rainwater.”
  • Consider lowering aluminum benchmark value to EPA’s 0.75mg/L for aquatic life reasons.

General requirements:

  • Training requirements slightly modified for clarity.
  • Consider requiring that facility SWPPPs must be made available to local and federal officials.
  • Consider faster turnaround time for BMP repairs (re: timelines).
  • Consider additional vehicle tracking requirements, clarification.
  • Update anti-degradation requirements to be consistent with updated rules, other stormwater programs.
  • Consider increased salt management requirements.


  • Consider clarifying vehicle wash water activities where inconsistently worded in “sector chapters.”
  • Construction stormwater (CSW) activities for sand & gravel facilities and landfills: consider allowing 1+ acre activities and add CSW-like language, so that a separate CSW permit is not required.
  • Consider revising sampling requirements to allow air transportation facilities who use zero gallons/tons of deicing fluid to not have to sample for deicing-specific parameters.
  • Consider additional or more specific requirements for permittees in Sectors M or N who infiltrate their industrial stormwater.

Comments? Suggestions?

If you have any comments or suggested changes to the current permit, including language you would like to see added or removed, please email program coordinator Melissa Wenzel or call 651-757-2816. Emails are preferred for written documentation purposes.  

Stay up-to-date by visiting the MPCA's Permit Development and Program History webpage.

MPCA presenting at national pollution prevention conference