Virtual Workshop on Non-Tailpipe Particulate Matter Emissions and Exposure

November 12, to November 13, 2020

With the substantial and ongoing reductions in tailpipe emissions of particulate matter and other exhaust components, there is increasing interest in better characterization of non-tailpipe emissions and their potential health effects, specifically, particles from tire and brake wear and road dust.

In view of the importance of this issue, HEI organized a two-day virtual workshop on November 12-13, 2020 bringing together experts from a range of topics related to brake and tire wear emissions, their impacts on air quality, and potential associations between exposures and health effects.

The specific objectives of the workshop were (1) to understand the state of the science related to measuring and modeling non-tailpipe particulate matter emissions and exposure assessment, and (2) to identify research priorities related to knowledge gaps in this area that can be used by HEI and other organizations in planning future research.

The workshop was chaired by Dr. Allen Robinson, Carnegie Mellon University and Member of HEI Research Committee, and Dr. Meredith Franklin, University of Southern California and was attended by approximately 50 researchers and government and industry representatives from the US, Europe, and Japan.

Planning Committee: Allison Patton, Pallavi Pant, Dan Crouse, Martha Ondras, Joanna Keel, Allen Robinson, Meredith Franklin, Annemoon van Erp, Dan Greenbaum, and Rashid Shaikh

Sessions

Welcome and Introduction

Nov 12, 2020 - 10:00am

Welcoming remarks

  • Daniel S. Greenbaum
    ,

    Health Effects Institute

HEI perspective on non-tailpipe particulate matter

Purpose and objectives of the workshop

  • Allison P. Patton
    , Health Effects Institute

Research Committee perspective

Health Effects of Non-Tailpipe Emissions: Current Knowledge

Nov 12, 2020 - 10:15am

Chair: Allen Robinson, Carnegie Mellon University

Assessing human exposure for health effects studies of non-tailpipe emissions

Toxicology and health effects of non-tailpipe emissions

Perspectives from regulators and manufacturers

Characterizing Non-Tailpipe Particulate Matter Emissions

Nov 12, 2020 - 11:25am

Chair: Meredith Franklin, University of Southern California

Brake wear particle mass emissions: Measurement techniques and recent results

Characterizing non-tailpipe PM emissions: Current status and challenges

Tire and road wear particles (TRWP): Generation, characterization, and airborne assessment

  • Kimm Jarden
    , The Tire Industry Project (TIP)/Goodyear Tire & Rubber Co

Emissions factors for non-tailpipe particulate matter

Breakout session to address questions related to the measurement of emissions and development of emission factors and begin to consider how emissions can be used to characterize exposure

Nov 12, 2020 - 1:15pm

Chair: Allen Robinson, Carnegie Mellon University

Moderators: Dan Greenbaum, Meredith Franklin, Dave Foster, Allen Robinson, Rashid Shaikh, Annemoon van Erp

Discussion Questions:

  1. What are the critical analytical challenges to measuring and modeling non-tailpipe PM emissions at scale?
  2. What particle characteristics should be measured? How might particulate matter emissions from non-tailpipe emissions be differentiated from other sources? To what extent are unique tracers available and applicable?

Adjourn Day 1

Nov 12, 2020 - 2:30pm

Introduction Day 2

Nov 13, 2020 - 10:00am

Welcome and Agenda

  • Annemoon M. van Erp
    , Health Effects Institute

Recap of Day 1

Measuring and Modeling Concentrations of Non-Tailpipe Particulate Matter

Nov 13, 2020 - 10:10am

Chair: Meredith Franklin, University of Southern California

Field measurement of tailpipe and non-tailpipe particulate matter

A case study characterizing non-tailpipe emissions in Boston

Chemical transport and dispersion models for exposure assessment

Land use regression models for exposure assessment of non-tailpipe PM constituents and sources

Panel Discussion: Identifying Potential Impacts of Non-Tailpipe Particulate Matter

Nov 13, 2020 - 11:25am

Chair: Allen Robinson

Panelists:
Gerard Hoek, Utrecht University, The Netherlands
Michael Jerrett, University of California, Los Angeles
Matti Maricq, Ford
Giorgio Martini, Joint Research Centre of the European Commission

Breakout session to address questions related to exposure assessment and research needs for health studies and begin to focus on research priorities

Nov 13, 2020 - 12:30pm

Chair: Meredith Franklin, University of Southern California

Moderators: Dan Greenbaum, Meredith Franklin, Dave Foster, Allen Robinson, Rashid Shaikh, Annemoon van Erp

Discussion Questions:

  1. What are the critical data-related limitations to developing real-world exposure and roadside patterns of non-tailpipe particulate matter, and how could they be filled?
  2. What are the important health and regulatory questions related to non-tailpipe particulate matter and what analytical approaches could be applied to study potential health effects of exposures to non-tailpipe emissions?

Discussion to Identify Research Priorities

Nov 13, 2020 - 1:05pm

Chairs: Meredith Franklin, University of Southern California and Allen Robinson, Carnegie Mellon University

Final Comments and Way Forward

Nov 13, 2020 - 2:25pm

Dan Greenbaum, Health Effects Institute

Adjourn Day 2

Nov 13, 2020 - 2:30pm
Location
Virtual HEI
Boston, MA 02110
United States