Experimental Investigation of Motor Vehicle Particulate Matter Emissions: Resuspended Dust from Public Paved Roads

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St.Louis SupersiteProject Update
Meg N.S. Yu Professor Jay R. Turner Environmenta
l Engineering Program Washington University in
St. Louis Sustainable Air Quality Monday
Presentation April 9, 2001
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Fine Particulate Matter Monitoring Strategy
Supersites Program
PM2.5 Speciation Network
PM2.5 Compliance Network (mass concentration)
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USEPA Fine Particulate Matter Supersites Program
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(No Transcript)
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Supersite Monitoring Locations
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Supersite Locations and Mass/Speciation Sites
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East St. Louis Core Site
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N. St. Louis City (Margaretta) Site

• Urban Residential
• St. Louis Supersite Satellite Location Will
  monitor 4 wks of each quarter year
• Location of previous March-Midwest Study

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St. Louis - Midwest Supersite Collaborators

• Georgia Institute of Technology
• U.S. EPA Region VII
• Missouri Department of Natural Resources
• Illinois Environmental Protection Agency
• St. Louis City Air Pollution Control Program
• St. Louis County Department of Health
• Siting Cooperation
• Illinois Department of Transportation
• City of St. Louis
• Mineral Area College

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St. Louis Supersite Project Objectives

• USEPA identified three overarching objectives
  which each Supersite must address. The following
  summarizes the St. Louis Supersite
  approach to these objectives
• (1) improved understanding of source-receptor
  relationships to support control strategy
  development
• St. Louis is an urban island, broadly
  representative of the urban Midwest
• (2) support health effects and exposure studies
• integration with three large health effects
  programs (nine separate studies)
• (3) evaluation of emerging sampling methods
• battery of advanced measurements for aerosol
  physical properties and chemical composition
• emphasis on methods with demonstrated or
  potential ability to operate reliably for
  extended periods with limited attendance

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Aerosol Physical Properties (examples)

• Near-Real Time Automated Measurements
• aerosol size distributions (5-min) core
• aerosol integral moments (1-sec) core and
  satellite
• Number
• Scattering
• Electrical Charge

OPC optical particle counter SMPS scanning
mobility particle spectrometer
other aerosol properties (e.g., surface area)
Assume PSD shape (e.g., lognormal)
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Aerosol Chemical Properties (examples)

• Semi-continuous Automated Measurements (hourly or
  better)

Circles denote measured species also PM2.5 mass,
and 15 elements retrospectively
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Example - Continuous Bulk Nitrate Aerosol Data
from PILS-IC
Atlanta Supersite - August 1999
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Aerosol Physical/Chemical Properties (examples)

• Time-Integrated Substrate Methods24-hour
• PM1, PM2.5, PM10 mass
• PM2.5 speciation (ions, elements, EC/OC)
• PM2.5 organics speciation
• Coarse PM elements, EC/OC
• Toxicological sampler (trichot)
• Also
• Precursor gases (e.g., NH3, H2SO4, HNO3) 24-hour
• Volatile Organic Compounds 24-hour
• Criteria gases5-min (IEPA)
• Meteorology (WS, WD, RH, T, P, Solar Rad, Precip)

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Integration with Exposure Health Effects Studies
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Integration with Exposure Health Effects
Studies

• measurement of personal and indoor exposures
• H. Suh P. Koutrakis (EPRI Exposure Studies)
• cardiac vulnerability in potentially susceptible
  subjects
• F. Speizer (NIEHS Program Project)
• implantable defribrillators detected arrhythmias
• D. Dockery (NIEHS Program Project)
• conditions in elderly which predispose towards
  acute adverse effect of particulate exposure
• J. Schwartz (EPA PM Center)
• chronic effects of particulate exposure
• D. Dockery (EPA PM Center)
• in vitro toxicity of St. Louis particulate matter
• L. Kobzik P. Koutrakis (EPA PM Center)

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Core Site Status as of March 18, 2001
Equipment installation starts next week 3-4 week
shakedown period
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Air Quality Laboratory
INTERNET SITES St. Louis - Midwest
Supersite http//capita.wustl.edu/StLSuperSite/ Wa
shington University Air Quality Laboratory follow
link at http//www.seas.wustl.edu/user/jrturner/
For More Information Jay R. Turner Department
of Chemical Engineering Campus Box
1198 Washington University tel
314-935-5480 One Brookings Drive fax
314-935-5464 St. Louis, MO 63130 email
JRTURNER_at_SEAS.WUSTL.EDU