Date Printed: 2/26/2026 01:30 Daily Summary Report Site: Clemmons Middle 2/25/2026 Interval: 001h Ozone PM2.5 PM10 LC PM Coarse Time ppm ug/m3 ug/m3 ug/m3 00:00 D 14.4 19.6 5.2 01:00 D 16.4 22.1 5.7 02:00 D 25.4 32.8 7.3 03:00 D 28.3 35.2 6.9 04:00 D 28.5 34.5 6.0 05:00 D 27.9 34.1 6.1 06:00 D 32.1 40.4 8.3 07:00 D 37.3 47.4 10.0 08:00 D 34.7 43.7 8.9 09:00 D 34.4 42.4 7.9 10:00 D 31.6 39.2 7.6 11:00 B 28.9 37.1 8.1 12:00 B 28.1 35.7 7.5 13:00 B 27.5 38.6 11.1 14:00 D 26.5 36.3 9.8 15:00 D 24.6 36.4 11.7 16:00 B 20.5 31.1 10.6 17:00 D 18.0 29.1 11.0 18:00 D 13.6 26.4 12.8 19:00 D 8.9 20.2 11.3 20:00 B 7.9 15.6 7.6 21:00 D 7.7 14.1 6.4 22:00 C 7.4 12.8 5.4 23:00 C 7.4 13.2 5.8 Average 22.4 30.7 8.2 Max D 37.3 47.4 12.8 Max Hour 07:00 07:00 18:00 Min D 7.4 12.8 5.2 Count 0 24 24 24 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error Ozone O3_Auto ZERO 25-Feb-2026 22:50:00 23:20:00 0 0.0 0.00 PREC 25-Feb-2026 22:50:00 23:50:00 0.068 0.07 -2.35% Date Printed: 2/26/2026 01:30 Daily Summary Report Site: Hattie Avenue (A) 2/25/2026 Interval: 001h Ozone NO NO2 NOx SO2 Time ppm ppb ppb ppb ppb 00:00 D .2 8.8 9.0 .1 01:00 D .2 6.3 6.6 .2 02:00 D .1 5.8 6.0 .0 03:00 D .2 7.7 7.9 .0 04:00 D .2 7.6 7.9 .0 05:00 D .2 6.5 6.8 .1 06:00 D .3 10.0 10.4 .1 07:00 D .7 11.6 12.4 .1 08:00 D .8 7.6 8.4 .1 09:00 D .9 5.7 6.7 .2 10:00 D 1.4 6.1 7.6 .4 11:00 D 1.1 5.5 6.6 .4 12:00 D .8 5.5 6.4 .4 13:00 D .4 5.2 5.7 .4 14:00 .051 .3 5.2 5.6 D 15:00 .051 .4 5.1 5.6 D 16:00 .053 .3 5.0 5.3 D 17:00 .051 .2 5.7 5.9 .2 18:00 .048 .1 4.8 4.9 .1 19:00 .041 .1 4.7 4.9 .0 C 20:00 .039 .1 4.9 5.1 C 21:00 .036 .1 5.7 5.9 .1 C 22:00 .036 C .1 4.3 4.4 .0 23:00 C .1 3.7 3.9 .0 Average .045 .3 6.2 6.6 .1 Max .053 1.4 11.6 12.4 .4 Max Hour 16:00 10:00 07:00 07:00 13:00 Min .036 .1 3.7 3.9 .0 Count 9 24 24 24 20 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error Ozone O3_Auto ZERO 25-Feb-2026 22:50:00 23:20:00 0 0.0 0.00 PREC 25-Feb-2026 22:50:00 23:50:00 0.07 0.0 .07 SO2 SO2_Auto ZERO 25-Feb-2026 19:46:00 20:11:00 0 0.0 -.07 SPAN 25-Feb-2026 19:46:00 20:36:00 87.6 90 -2.66% PREC 25-Feb-2026 19:46:00 21:01:00 38.5 40 -3.56% Date Printed: 2/26/2026 01:30 Daily Summary Report Site: Hattie Avenue (B) 2/25/2026 Interval: 001h PM2.5 PM10 STP PM Coarse Time ug/m3 ug/m3 ug/m3 00:00 12.7 18.9 7.1 01:00 15.5 21.2 6.5 02:00 24.2 30.3 7.1 03:00 28.0 34.7 7.9 04:00 28.0 33.8 7.0 05:00 30.1 35.4 6.4 06:00 32.5 39.0 7.8 07:00 37.3 43.0 7.0 08:00 36.7 42.9 7.3 09:00 34.4 41.0 7.3 10:00 32.6 41.8 9.4 11:00 28.4 37.7 9.2 12:00 27.4 37.4 9.6 13:00 26.8 37.2 10.0 14:00 26.8 38.3 11.2 15:00 25.8 39.0 12.7 16:00 22.5 35.0 12.1 17:00 19.8 32.6 12.5 18:00 15.4 30.0 14.4 19:00 9.7 22.4 12.7 20:00 8.8 17.1 8.3 21:00 8.7 16.6 8.0 22:00 8.1 13.6 5.5 23:00 7.9 13.4 5.6 Average 22.8 31.3 8.8 Max 37.3 43.0 14.4 Max Hour 07:00 07:00 18:00 Min 7.9 13.4 5.5 Count 24 24 24 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error 0.0 -3.56% Date Printed: 2/26/2026 01:30 Daily Summary Report Site: Union Cross 2/25/2026 Interval: 001h Ozone Barometric Pres. Temperature (°F) Dew Point (°F) Time ppm mmHg DegF DegF 00:00 D 733.7 36.8 17.4 01:00 D 733.1 38.6 18.7 02:00 D 733.0 39.1 19.4 03:00 D 732.5 38.6 19.8 04:00 D 732.1 39.8 20.1 05:00 D 732.2 41.9 20.3 06:00 D 732.0 07:00 D 731.8 42.1 20.7 08:00 D 731.8 43.1 21.5 09:00 D 731.8 45.5 23.0 10:00 D 731.9 49.3 25.4 11:00 D 731.6 52.9 28.3 12:00 D 730.7 55.8 30.9 13:00 D 729.7 58.2 33.3 14:00 D 729.5 57.0 33.2 15:00 D 729.4 57.0 34.4 16:00 D 729.5 59.0 36.9 17:00 D 729.8 58.4 38.7 18:00 D 730.1 57.3 40.8 19:00 D 730.9 55.7 42.9 20:00 D 731.8 55.1 43.7 21:00 D 732.3 54.5 44.0 22:00 C 732.7 54.3 44.9 23:00 C 733.0 53.7 45.9 Average 731.5 49.7 30.6 Max D 733.7 59.0 45.9 Max Hour 00:00 16:00 23:00 Min D 729.4 36.8 17.4 Count 0 24 23 23 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error Ozone O3_Auto ZERO 25-Feb-2026 22:50:00 23:20:00 0 0.0 0.00 PREC 25-Feb-2026 22:50:00 23:50:00 0.068 0.07 -1.86% Flags T Out of Control A Arithmetic Error (math calculation error) t Out of Control (Partial) S Site Visit s Site Activity > Some Data Missing + Max Exceeded - Min Exceeded < Logger Invalid ? Suspect a Audit B Bad Status C Calibration c Ceiling Limit D Channel Disabled E Edited e Site Malfunction f Floor Limit H High-High Alarm h High Alarm I Invalidated By Edit J High Rate of Change Exceeded L Low-Low Alarm l Low Alarm M Maintenance m Marked Maint by edit O Overrange o Other P Power Failure p Precision Check Q Quality Assured R Rate of Change Exceeded V Dig Info#1 W Dig Info#2 X Dig Info#3 Y Dig Info#4 Z Dig Info#5 z Zero Adjusted F Boiler Offline j Low Rate of Change Exceeded