CALIBRATING CONCERN ABOUT PAHS IN URBAN AIR USING MONITORING AND MODELING:

A PROJECT PLAN SUMMARY

Funding: U.S. EPA Community Air Toxics Ambient Monitoring Grant # XA00E00976

Passive Monitors: donated by Oregon State University, Simonich Environmental Chemistry Laboratory

• Size Matters

• Ambient Temperature Matters

• Branching Matters

• Substitution Matters

• Cancer Potency Matters

• Kristie Ellickson, Greg Pratt, Cassie McMahon,

Mike Bauer, and (potentially a new planner from

the air policy unit)

• Carl Herbrandson

• Paul Swedenborg, Mike Krause, Christina

Rainaldo, Wyatt Hedine

• Charlie Lippert

Project Team

Where to put the monitors?

Where to put the passive monitors?

2010 U.S. Census Data: Income, Population Demographics

Traffic Density

Final Sampling Plan (Rural and Urban Locations)

South Minneapolis Locations

Passive sitesActive sites

Peace Garden Site

Passive sitesActive sites

South Minneapolis Locations

Passive sitesActive sites

South Minneapolis Locations

Passive sitesActive sites

South Minneapolis Locations

Passive sitesActive sites

Passive Air Sampling

Active Air Sampling

Active Air Sampling Train

Calibration of Passive Samplers

Sampling Rate (m3 day-1) =

CPAS = mass of specific PAH on passive sampler media (ng)CAIR = concentration of specific PAH in air (ng m-3)

But, we may have to adjust for calculate an effective air volume

0%

5%

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40%

45%Urban Air cPAH fractions: Mass (%) (active sampler-preliminary data)

% cPAH mass

0%

5%

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45%

Urban Air cPAH fractions: Mass and Potency (BaP-PEQ)

% cPAH mass

% cPAH BaP-PEQ

MDH Priority cPAHs (21)

Preliminary Data – MN PCA/MDH – Ellickson et al.

MDH Priority cPAHs (21)

EU marker cPAHs (4)

Thanks!