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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 - PowerPoint PPT Presentation
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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%
10%
15%
20%
25%
30%
35%
40%
45%Urban Air cPAH fractions: Mass (%) (active sampler-preliminary data)
% cPAH mass
0%
5%
10%
15%
20%
25%
30%
35%
40%
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!