Dr. Sarah Hobbie
Dr. Sarah Hobbie
image Bill Selbig
Bill Selbig
Randy Neprash
Randy Neprash
Aileen Molloy
Aileen Molloy
Hillary Yonce
Hillary Yonce

The Minnesota Pollution Control Agency (MPCA) is hosting a live webinar on street sweeping, Thursday May 13, 9:30-11:00 AM. 1.5 professional development hours (pdh) are available for attending this webinar.

This webinar will provide information on the importance and value of street sweeping for controlling nutrient loading to receiving waters, an overview of a new street sweeping crediting tool for phosphorus, a discussion of street sweeping guidance, and a discussion of additional research needs. The tentative agenda is as follows.


  • Opening statement - the importance and value of street sweeping: Randy Neprash, PE, Minnesota Cities Stormwater Coalition, Stantec
  • Discussion of trees as a source of nutrients in urban stormwater, focused on impacts of trees: Dr. Sarah Hobbie, Distinguished McKnight University Professor, Dept. of Ecology, Evolution & Behavior, University of Minnesota
  • Overview of recently developed street sweeping calculator: Aileen Molloy, Tetra Tech
  • Overview of draft guidance for street sweeping: Hillary Yonce, Tetra Tech
  • Discussion of additional research needs: William Selbig, Research Hydrologist, USGS Upper Midwest Water Science Center
  • Q&A

Link here for information on street sweeping

Webinar information

MPCA Collaboration invites you to join this Webex meeting.

Meeting number (access code): 187 072 8914

Meeting password: 2w6pHMmTUF7

Thursday, May 13, 2021, 9:30 AM, (UTC-05:00) Central Time (US & Canada), 1 hr 30 mins

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Tap to join from a mobile device (attendees only) +1-415-655-0003,,1870728914## United States Toll

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Speaker information

  • Sarah Hobbie: Dr. Sarah Hobbie is in the Department of Ecology, Evolution and Behavior. Her research focuses on the influence of changes in atmospheric composition, climate, and land use on communities and ecosystems, and on the effects of urbanization on biodiversity and water quality. She leads the new Minneapolis-St. Paul Metropolitan Area Long Long Term Ecological Research program, focused on understanding interactions between people and nature in the Twin Cities. She is a member of the National Academy of Sciences and a Fellow of the American Academy of Arts and Sciences. She serves on the Advisory Board of the Earth Leadership Program and on several editorial boards.
  • Bill Selbig: Bill is a research hydrologist at the Upper Midwest Water Science Center of the U.S Geological Survey. For the past 25 years his research has focused on characterization of pollutants in urban runoff, identification of their sources, and evaluation of the techniques and practices designed to reduce their impact to water resources. Much of his research has been used to stimulate or amend stormwater policy and guidance in the United States. In addition to his work at the USGS, Bill serves as science advisor for several stormwater research groups across the country.
  • Randy Neprash: Randy Neprash, PE is the staff person for the Minnesota Cities Stormwater Coalition, an organization of about 130 of the MS4-permitted cities in Minnesota. He is a founder and currently the Vice Chair of the National Municipal Stormwater Alliance, an organization comprised of state and regional-level coalitions of MS4 permittees. He is also a Stormwater Regulatory Specialist with Stantec Consulting.
  • Hillary Yonce: Hillary is a professional hydrologist and environmental scientist at Tetra Tech. As a member of both the watershed modeling and stormwater engineering teams, she has worked on a wide variety of projects across the United States with Tetra Tech over the past 9 years.
  • Aileen Molloy: Aileen is a project manager and environmental scientist at Tetra Tech. She provides technical and programmatic support to federal, state, and local government clients in stormwater management, watershed planning, and TMDL development. She also supports MS4 jurisdictions in meeting permit requirments and TMDL allocations.

Professional Development Hours (pdhs)

1.5 pdhs are offered for this webinar. The link to the certificate will be posted the day of the event.

Read the section on pdhs

Links to information on street sweeping

This page was last edited on 7 May 2021, at 02:14.