The analytical methods implemented during this study followed EPA standard methods and Federal Reference Methods for performing ambient air measurements when applicable.
The following table summarizes the measurements taken at each monitoring site.
Table 1. Summary of Measurements Conducted at Each Monitoring Site.
Measurements |
10 Meter Roadside |
100 Meter Downwind |
300 Meter Downwind |
100 Meter Upwind |
|---|---|---|---|---|
TO-11A Cartridge sampling |
X |
X |
X |
X |
TO-15 Canister sampling |
X |
X |
X |
X |
Continuous gas monitoring (CO, NOx ) |
X |
X |
X |
X |
Continuous black carbon monitoring (Aethalometer) |
X |
X |
X |
X |
Continuous fine particle (TEOM) |
X |
X |
X |
X |
Integrated PM2.5 (FRM) |
X |
X |
X |
X |
Wind speed/wind direction |
X |
X |
X |
X |
Meteorological monitoring (temp, RH, etc.) |
X |
|||
Sound Meter |
X |
X |
||
Video Camera |
X |
X |
||
Traffic Sensors (Wavetronix) |
X |
X |
The video was also used to validate traffic count information from the radar units.
Most analyzers deployed for this study performed well with the exception of the TEOMs. While an instrument upgrade was performed in the field by technical staff from the equipment manufacturer in late November 2009 and early December 2009 in Las Vegas, Nevada, these upgrades improved instrument performance and stability, but issues remained. Instrument performance remained an issue throughout the Detroit study.
