FHWA and EPA National Near-Road Study Las Vegas

16 Appendix -- Data Validation / Instrument Checks

Each day, data was accessed using WinCollect. Graphical reports were run to determine instrument status and data validity. Examples of these graphical reports are shown on the following pages. Instrument issues were identified and noted in a logbook at the computer being used to run WinCollect. The graphs and any instrument issues were noted in an email to the site operator, EPA and contractor staff.

WindSpeed 090425_0000 to 090430_0000 - Description: The graph compares stations at 10m, 100m, 300m, and upwind. All of the stations report similar values with no discernable trends. Aethalometer 090425_0000 to 090430_0000 - Description: The graph compares stations at 10m, 100m, 300m, and upwind. All of the stations report similar values with 10m having the greatest spike to around 3.0. CO Span Check 090425_0000 to 090430_0000 - Description: The graph compares stations at 10m, 100m, 300m, and upwind. All of the stations report similar values with 30m having the greatest spike to around 4.1. CO Zero Check 090425_0000 to 090430_0000 - Description: The graph compares stations at 10m, 100m, 300m, and upwind. All of the stations report similar values with no discernable differences. NO_SO2 Zero Check 090425_0000 to 090430_0000 - Description: The graph compares stations at 10m, 100m, 300m, and upwind. All of the stations report similar values with no discernable differences. NO_SO2SpanCheck 090425_0000 to 090430_0000 - Description: The graph compares stations at 10m, 100m, 300m, and upwind. All of the stations report similar values with no discernable differences. NOX_SO2_Data 090425_0000 to 090430_0000 - Description: The graph compares stations at 100m and Upwind. The graph shows no discernable patterns. PM10 090425_0000 to 090430_0000 - Description: The graph compares stations at 10m, 100m, 300m, and upwind. All of the stations report similar values with 300m showing the greatest peaks to 100. PM25 Check 090425_0000 to 090430_0000 - Description: The graph compares stations at 10m, 100m, 300m, and upwind. All of the stations report similar values with upwind showing the greatest peaks to 80.0.

ShelterTemps 090425_0000 to 090430_0000 - Description: The graph compares stations at 10m, 100m, 300m, and upwind. All of the stations report similar values with no discernable differences.

Shelter Temps vs Ambient 090903_0000 to 090910_0000 - Description: The graph compares stations at 10m, 100m, 300m, and upwind. All of the stations report similar values with 100m having the greater values and upwind having the lowest values. TEOM 1 090425_0000 to 090430_0000 - Description: The graph compares stations at 10m for various difference sensors. All of the stations report similar values with no discernable patterns. TEOM 2 090425_0000 to 090430_0000 - Description: The graph compares stations at 100m for various difference sensors. All of the stations report similar values with no discernable patterns. TEAM 2.5 - Description: The graph compares stations at 10m, 100m, 300m, and upwind. All of the stations report similar values with upwind having the highest values near 50.0. TEOM 3 090425_0000 to 090430_0000 - Description: The graph compares stations at 300m with various sensors. PM Coarse has the highest values at 100.0. TEOM Check 090425_0000 to 090430_0000 - Description: The graph compares stations 10m, 100m, 300m and Upwind. The values are comparative to each other with no discernable differences. WindDirection 090425_0000 to 090430_0000 - Description: The graph compares stations 10m, 100m, 300m and Upwind. The values are comparative to each other with no discernable differences.