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Measuring Sub-23 Nanometer Real Driving Particle Number Emissions Using the Portable DownToTen Sampling System
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Rubbertown Next Generation Emissions Measurement Demonstration Project.

Eben Thoma1, Ingrid George2, Rachelle Duvall3

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Summary

Next generation emissions measurement (NGEM) approaches reveal elevated 1,3-butadiene levels near industrial sites. These advanced tools improve understanding of air toxic emissions and their impact on nearby communities.

Keywords:
1,3-butadieneNGEMauto-GCfenceline monitoringfugitive emissionmethod 325

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Area of Science:

  • Environmental Science
  • Air Quality Monitoring
  • Industrial Emissions

Background:

  • Industrial facilities release air pollutants from various sources, posing challenges for understanding and management.
  • Next generation emissions measurement (NGEM) offers innovative methods for assessing these sources and their community impacts.

Purpose of the Study:

  • To evaluate the application of emerging NGEM systems in an industrial district (Rubbertown, Louisville, KY).
  • To focus on assessing 1,3-butadiene, a significant area air toxic, using complementary NGEM approaches.

Main Methods:

  • A one-year deployment of passive samplers (PSs) at 11 sites to identify geospatial and temporal trends.
  • Analysis of two elevated 1,3-butadiene periods using time-resolved NGEM data and source location models.
  • Integration of air pollutant and wind data from prototype NGEM systems.

Main Results:

  • Annual average 1,3-butadiene concentrations were higher near facility fence lines (0.24 ppbv) compared to community sites (0.07 ppbv).
  • Case studies identified localized, multi-day emissions from unidentified sources and broader impacts from known industrial events.
  • NGEM data effectively informed emission event assessments.

Conclusions:

  • NGEM approaches significantly enhance the understanding of near-source emissions.
  • These methods improve knowledge of air toxic impacts on communities adjacent to industrial areas.
  • Complementary use of NGEM systems provides a powerful tool for air quality management.