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Pennsylvania’s MS4 Program and its Impact on Developmentwww.phrc.psu.edu

Provider # 60114115 PPP ID: 1562

Description

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Stormwater flowing through separate storm sewer systems is untreated prior to being discharged to surface waters, which means that pollutants like sediment, chemicals, oils, and pet waste that interact with stormwater are carried right to our waterways. Consequently, Pennsylvania’s Municipal Separate Storm Sewer (MS4) program requires municipalities within urbanized areas having separate storm sewer systems to obtain a permit to discharge stormwater into local streams and rivers with the goal of improving water quality. This webinar will discuss stormwater issues in Pennsylvania and MS4 permit requirements with a focus on portions of the Stormwater Management Programs that are likely to affect development.

Learning Objectives

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1. Define stormwater and understand how stormwater impacts water quality.

2. Define MS4 and understand what causes an entity to be regulated under Pennsylvania’s MS4 program.

3. Understand permit requirements for municipalities under the MS4 program, particularly the components of the Stormwater Management Program.

4. Understand the importance of construction site erosion control and post construction stormwater management for reducing both short and long term impacts of development on water quality.

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Pennsylvania’s MS4 Program

and its Impact on Development

Danielle Rhea, Water Resources Educator

What is a Watershed?

The land area that contributes runoff to a particular point along a waterway.

Maxfield Designs, Keri Maxfield

We all live in a watershed

Maxfield Design, Keri Maxfield

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Excess stormwater runoff is a result of impervious surfaces

Stormwater runoff transports nonpoint sources of pollution to our waterways

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Stormwater is the primary pathway of pollutants entering our local waterways.

Stormwater Impacts

• Flash Flooding• Pollution• Threats to Human

Health• Stream Bank Erosion• Sedimentation in

Stream Beds• Loss of Groundwater

Recharge• Costly water treatment

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The Clean Water Act prohibits the discharge of pollutants into waterways without the appropriate permit

Stormwater Management in Pennsylvania

1972

Federal Clean Water Act

1990

Phase I Municipal National Pollution Discharge Elimination System (NPDES) program established

2002

DEP issued PAG-13 and finalized Comprehensive Stormwater Management Policy

1978

PA’s Storm Water Management Act of 1978 – Act 167

1999

NPDES Phase II

2006

PA Stormwater Best Management Practices Manual

2011

DEP released new MS4 permit requirements

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MS4

Municipal

Separate

Storm

Sewer

System

Who must obtain MS4 permit coverage?

Entities in Urban

Areas

Separate Storm Sewer System

Must apply for PAG-13 or individual NPDES permit

coverage

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Pennsylvania MS4s

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Minimum Control Measures

MCM #1: Public Education and Outreach on Stormwater Impacts

MCM #2: Public Involvement / Participation

MCM #3: Illicit Discharge Detection and Elimination

MCM #4: Construction Site Stormwater Runoff Control

MCM #5: Post-Construction Stormwater Management (PCSM) in New Development and Redevelopment

MCM #6: Pollution Prevention / Good Housekeeping

MCM #1: Public Education and Outreach on Stormwater Impacts

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MCM #2: Public Involvement / Participation

“…any discharge to an MS4 that is not composed entirely of stormwater…”

MCM #3: Illicit Discharge Detection and Elimination

MCM #4: Construction Site Stormwater Runoff Control

Danielle Rhea, Penn State

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MCM #5 Post-Construction Stormwater Management

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Danielle Rhea, Penn State

MCM #6: Pollution Prevention / Good Housekeeping

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TMDL

Total

Maximum

Daily

Load

Pollution Reduction Plan

Implications of PRP

• Reduce stormwater flows and pollutant loadingo Stream/floodplain restoration projects

o Stormwater retrofits

o Green infrastructure

o Post construction stormwater management

o Focus on new development

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Potential Impact of PRP on New Development

• Require additional BMPs to assist with meeting PRP goals?

• Promote creative approaches to stormwater management?

Find answers to more of your questions about stormwater at extension.psu.edu

Stormwater Basics

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extension.psu.edu/water

Danielle Rhea

Water Resources Educator

drs5277@psu.edu

Pennsylvania’s MS4 Program and its Impact on Developmentwww.phrc.psu.edu

Provider # 60114115 PPP ID: 1562

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Photo Credits1. Silt Fence Erosion Control by ArmchairBuilder.com on Flickr.com licensed under CC BY 2.02. Maxfield Design, Keri Maxfield3. Maxfield Design, Keri Maxfield4. P1010282 by Minneapolis Public Works TPP on flickr.com licensed under CC BY 2.05. Wiesbaden Army Airfield's Basic Load Storage Area demolition day by U.S. Army Corps of Engineers on flicker.com. Licensed under CC-BY 2.06. Photo by Tim McCabe, USDA Natural Resources Conservation Service7. Danielle Rhea, Penn State8. Jennifer Fetter, Penn State9. Heather McKean, Penn State10. Jennifer Fetter, Penn State11. Heather McKean, Penn State12. J. Craig Williams, Penn State13. Tim McCabe, USDA Natural Resources Conservation Service 14. Outfall by STORM Outreach on flickr.com licensed under Public Domain15. 190517_Campus_Aerial by Michael Hout16. Danielle Rhea, Penn State17. Amy Smith, USDA Natural Resources Conservation Service18. Jennifer Fetter, Penn State19. Danielle Rhea, Penn State20. Scott Sjolander, Penn State21. John Turack, Penn State22. NAVFAC Hawaii Storm Water System Inspections Provide Valuable information by NAVFAC on flickr.com licensed under CC BY 2.023. Oil and Water by David Goehring on flickr.com. Licensed under CC-BY 2.024. Excavator by Bryn Pinzgauer on flicker.com licensed under CC-BY 2.025. Danielle Rhea, Penn State26. Photo by Charlie Rahm, USDA Natural Resources Conservation Service27. Scott Sjolander, Penn State28. Danielle Rhea, Penn State29. Jennifer Fetter, Penn State30. Jennifer Fetter, Penn State31. Jennifer Fetter, Penn State32. Scott Sjolander, Penn State33. Danielle Rhea, Penn State34. Jim Wellendorf35. Scott Sjolander, Penn State36. Danielle Rhea, Penn State37. Danielle Rhea, Penn State38. Scott Sjolander, Penn State39. Danielle Rhea, Penn State40. Danielle Rhea, Penn State

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