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Background. Street Sweeping!. The City wanted a pilot study before committing to wide-scale use of street sweeping as a BMP Watershed for the City’s nested stormwater monitoring site chosen for pilot study. Background. Background. Pilot Area Facts Moores Run Watershed Area – 2,335 acres

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Presentation Transcript
slide1

Background

Street Sweeping!

  • The City wanted a pilot study before committing to wide-scale use of street sweeping as a BMP
  • Watershed for the City’s nested stormwater monitoring site chosen for pilot study
slide3

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%
slide4

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%
slide5

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
slide6

Procedure

Baltimore City Pilot Street Sweeping Program

slide7

Findings

Hamilton Watershed Stormwater EMCs Compare Storms Before & After Street Sweeping BeganCopper concentration declined.

slide8

Findings

Hamilton Watershed Stormwater EMCs Compare Storms Before & After Street Sweeping BeganTotal nitrogen concentration declined.

slide9

Findings

Hamilton Watershed Stormwater EMCs Compare Storms Before & After Street Sweeping BeganNo reduction for total phosphorus.

slide10

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
slide11

Summary

  • Plans in the future…
  • Need to keep collecting data
  • Reduce the amounts of variability by increasing the frequency of sweeping
slide12

Any Questions…

Contact:

William P. Stack, Chief

Water Quality Management Section

410-396-0732

bill.stack@baltimorecity.gov

Norman Seldon

norman.seldon@baltimorecity.gov

Daisuke Matsuo

daisuke.matsuo@baltimorecity.gov