Street Sweep Project

1
Background
Street Sweeping!

• The City wanted a pilot study before committing
  to wide-scale use of street sweeping as a BMP
• Watershed for the Citys nested stormwater
  monitoring site chosen for pilot study

2
Background
3
Background

• Pilot Area Facts
• Moores Run Watershed Area 2,335 acres
• Moores Run Watershed Imperviousness 33
• Total Pilot Watershed Area (Within Moores Run
  Watershed) 107 acres
• Pilot Watershed Imperviousness 34

4
Background

• Pilot Area Facts
• Total Route Length 22,424 feet
• Sweeping Path Width 12 feet
• Total Area Swept (both sides of the street)
  12.35 acres
• Percentage of Pilot Watershed area swept 11.6

5
Procedure

• Every second and fourth Wednesday of the month,
  streets are swept in the pilot study area. After
  completing the route, the sweeper goes to the NW
  Transfer Station

6
Procedure
Baltimore City Pilot Street Sweeping Program
7
Findings
Hamilton Watershed Stormwater EMCs Compare
Storms Before After Street Sweeping
BeganCopper concentration declined.
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Findings
Hamilton Watershed Stormwater EMCs Compare
Storms Before After Street Sweeping Began
Total nitrogen concentration declined.
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Findings
Hamilton Watershed Stormwater EMCs Compare
Storms Before After Street Sweeping BeganNo
reduction for total phosphorus.
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Summary

• In Conclusion
• The Street Sweeping Program is removing a
  tremendous amount of debris
• Signs of reductions in the Storm water samples
• Due to variability, it is hard to credit the
  reductions to the Street Sweeping Program

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Summary

• Plans in the future
• Need to keep collecting data
• Reduce the amounts of variability by increasing
  the frequency of sweeping

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Any Questions Contact William P. Stack,
Chief Water Quality Management Section 410-396-073
2 bill.stack_at_baltimorecity.gov Norman
Seldon norman.seldon_at_baltimorecity.gov Daisuke
Matsuo daisuke.matsuo_at_baltimorecity.gov