Thermo Scientific's TEOM 1405 is a Federal Equivalent Method for monitoring ambient PM10 concentrations. The Gila River Indian Community's Air Quality Program has been using three of these instruments to monitor for PM10 across the reservation since 2013. In 2020, the Air Program staff discovered two historically acceptable methods of collecting the data from the instrument yielded significantly different 24-hour average concentrations. This presentation will present the results of our analysis.
Presented by Ryan Eberle, Gila River Indian Community
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