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. Author manuscript; available in PMC: 2019 Feb 15.
Published in final edited form as: Aerosol Sci Technol. 2017 Apr 28;51(7):787–800. doi: 10.1080/02786826.2017.1316830

Fig. 1.

Fig. 1

The outdoor sampling site setup. 1a: the real-time aerosol monitoring instruments operated each day for one hour, including the Aerotrak Handheld Optical Particle Counter (OPC, model 9306, TSI Inc., Shoreview, MN), and a DustTrak DRX Aerosol Monitor (DRX, model 8534, TSI Inc.). 1b: portable weather station (WS-2080 Wireless Weather Station, Ambient Weather, Chandler, AZ). 1c: active reference samplers for bioaerosol sampling operated in 24-hour intervals: three Button Aerosol Samplers (SKC Inc., Eighty Four, PA) operated at 4 L/min with PTFE filters (2 μm pore size, SKC Inc.) and AirChek XR5000 Sample Pumps (SKC Inc.). 1d: the passive samplers: six passive settling filters (25 mm PTFE filters with 2 μm pore size (SKC Inc.)), six REPS, and six 90 mm agar settling plates (three for culturable bacteria and three for culturable fungi).