2020 MS4 General Permit Appendix B: Schedules

Section 12. Stormwater Pollution Prevention Program (SWPPP)
Document.

• Submit the SWPPP Document completed in accordance with
  Section 12

• Within 150 days after General Permit issuance
  date.

Section 13. Stormwater Pollution Prevention Program (SWPPP)

• Complete revisions to incorporate the new requirements of
  Sections 14 - 23 into current SWPPP.

• Within 12 months of the date General Permit
  coverage is extended, unless other timelines have
  been specifically established in the General Permit
  and identified below.

Section 19. Construction Site Stormwater Runoff Control

• Complete revisions to Construction Site Stormwater Runoff
  Control program, including revisions to regulatory mechanism(s),
  if necessary.
  • When the CSW Permit is reissued, revise regulatory
    mechanism(s), if necessary, to be at least as stringent as the
    requirements for erosion, sediment, and waste controls described
    in the CSW Permit.

• Within 12 months of the date General Permit
  coverage is extended.
• Within 12 months of the issuance date of the CSW
  Permit (expected issuance date of the CSW Permit
  is August 1, 2023).

Section 21. Pollution Prevention/Good Housekeeping for
Municipal Operations

• Conduct structural stormwater best management practice (BMP)
  inspections.
  • Conduct pond and outfall inspections

• Each calendar year.
• Prior to the expiration date of the General Permit.

Section 22. Discharges to Impaired Waters with a USEPA-
Approved TMDL that includes an Applicable WLA

• Submit all information required in item 22.2.
  • Meet requirements for applicable WLAs for bacteria, chloride,
    and temperature in Section 22.

• With each annual report.
• Within 12 months of the date General Permit
  coverage is extended.

Section 25. Annual Assessment, Annual Reporting, and
Recordkeeping

• Conduct assessment of the SWPPP.
  • On a form provided by the Agency, submit an annual report.

• Prior to completion of each annual report.
• By June 30th of each calendar year.

Section 10. New Permittee Applicants

• Submit Part 1, and Part 2 of the permit application as required
  by Section 12.

• Within 18 months of written notification from the
  Commissioner that the MS4 meets the criteria in Minn.
  R. 7090.1010, subp. 1.A. or B. and General Permit coverage is
  required.

Section 13. Stormwater Pollution Prevention Program (SWPPP)

• Complete all requirements of Sections 14 - 23.

• Within 36 months of the date General Permit coverage is
  extended, unless other timelines have been specifically
  established in the General Permit and identified below; or
• Within timelines established by the Commissioner in item 8.3

Section 14. Mapping

• Develop a storm sewer system map.

• Within 24 months of the date General Permit coverage is
  extended.

Section 18. Illicit Discharge Detection and Elimination

• Develop, implement, and enforce an Illicit Discharge Detection
  and Elimination Program.

• Within 12 months of the date General Permit coverage is
  extended.

Section 19. Construction Site Stormwater Runoff Control

• Develop, implement, and enforce a Construction Site
  Stormwater Runoff Control Program.
  • When the CSW Permit is reissued, revise regulatory
    mechanism(s), if necessary, to be at least as stringent as the
    requirements for erosion, sediment, and waste controls described
    in the CSW Permit.

• Within 12 months of the date General Permit coverage is
  extended.
• Within 12 months of the issuance date of the CSW Permit
  (expected issuance date of the CSW Permit is August 1, 2023).

Section 20. Post-Construction Stormwater Management

• Develop, implement, and enforce a Post-Construction 
  Stormwater Management program.

• Within 24 months of the date General Permit
  coverage is extended.

Section 21. Pollution Prevention/Good Housekeeping for
Municipal Operations

• Conduct structural stormwater BMP inspections.
  • Conduct pond and outfall inspections.

• Each calendar year
• Prior to the expiration date of the General Permit.

Section 22. Discharges to Impaired Waters with a USEPA-
Approved TMDL that includes an Applicable WLA

• Submit all information required in item 22.2.
  • Meet requirements for applicable WLAs for bacteria, chloride,
    and temperature in Section 22.

• With each annual report.
• Within 12 months of the date General Permit coverage is
  extended.

Section 23. Alum or Ferric Chloride Phosphorus Treatment
Systems (if applicable)

• Meet requirements for treatment systems in Section 23

• Within 12 months of the date General Permit coverage is
  extended.

Section 25. Annual Assessment, Annual Reporting, and
Recordkeeping

• Conduct assessment of the SWPPP.
  • On a form provided by the Agency, submit an annual report.

• Prior to completion of each annual report.
• By June 30^th of each calendar year.