Date Printed: 9/20/2026 01:30 Daily Summary Report Site: Clemmons Middle 9/19/2026 Interval: 001h Ozone PM2.5 PM10 LC PM Coarse Time ppm ug/m3 ug/m3 ug/m3 00:00 .003 11.1 30.7 19.5 01:00 .003 11.8 31.3 19.4 02:00 .002 12.0 34.1 21.9 03:00 .005 11.3 29.0 17.6 04:00 .006 11.3 29.7 18.4 05:00 .010 B 10.5 24.2 13.7 06:00 .012 9.4 20.5 11.0 07:00 .016 8.0 15.8 7.7 08:00 .021 9.3 15.2 5.9 09:00 .028 10.6 16.2 5.5 10:00 .031 12.0 17.9 5.8 11:00 .036 11.4 18.2 6.7 12:00 .047 10.3 16.1 5.7 13:00 .050 B 8.5 13.9 5.3 14:00 .048 8.1 15.3 7.2 15:00 .049 7.9 13.7 5.8 16:00 .051 8.2 14.2 5.9 17:00 .048 8.1 14.0 5.8 18:00 .041 7.9 13.7 5.8 19:00 .024 8.4 15.3 6.8 20:00 .018 8.9 16.7 7.8 21:00 .012 10.1 18.6 8.5 22:00 .011 C 11.0 20.5 9.4 23:00 C 12.7 20.4 7.6 Average .024 9.9 19.8 9.7 Max .051 12.7 34.1 21.9 Max Hour 16:00 23:00 02:00 02:00 Min .002 7.9 13.7 5.3 Count 23 24 24 24 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error Ozone O3_Auto ZERO 19-Sep-2026 22:50:00 23:20:00 -0.001 0.0 0.00 PREC 19-Sep-2026 22:50:00 23:50:00 0.068 0.07 -2.76% Date Printed: 9/20/2026 01:30 Daily Summary Report Site: Hattie Avenue (A) 9/19/2026 Interval: 001h Ozone NO NO2 NOx SO2 Time ppm ppb ppb ppb ppb 00:00 .013 .6 4.6 5.2 .2 01:00 .017 .4 3.4 3.9 .2 02:00 .020 .4 2.9 3.4 .1 03:00 .020 .4 2.4 2.8 .2 04:00 .019 .3 2.5 2.9 .2 05:00 .020 .5 3.2 3.7 .1 06:00 .019 .5 3.3 3.8 .2 07:00 .020 .7 3.2 4.0 .2 08:00 .025 .6 3.0 3.7 .2 09:00 .030 .6 2.6 3.2 .2 10:00 .034 .5 2.4 2.9 .2 11:00 .040 .3 2.2 2.6 .2 12:00 .048 .2 1.6 1.9 .2 13:00 .051 .2 1.6 1.8 .2 14:00 .053 .1 1.6 1.8 .2 15:00 .051 .2 C 2.0 C 2.2 C .2 16:00 .051 C C C .2 17:00 .049 .1 C 2.9 C 3.1 C .2 18:00 .043 .0 4.3 4.4 .2 19:00 .037 .0 4.9 4.9 .2 C 20:00 .031 .1 6.3 6.4 C 21:00 .023 .2 9.0 9.2 .3 C 22:00 .024 C .2 > 7.0 > 7.3 > .2 > 23:00 C .2 6.1 6.3 .2 Average .032 .3 3.6 3.9 .1 Max .053 .7 9.0 9.2 .3 Max Hour 14:00 07:00 21:00 21:00 21:00 Min .013 .0 1.6 1.8 .1 Count 23 23 23 23 23 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error NO NOx_Auto NO-PREC 19-Sep-2026 15:46:00 16:11:00 69.6 70 -.45% GPT-PS 19-Sep-2026 15:46:00 16:18:00 0.6 0.0 .64 GPTZ 19-Sep-2026 15:46:00 16:38:00 225.2 225 .1% GPT-PREC 19-Sep-2026 15:46:00 17:08:00 157.1 155 1.41% NO2 GPT-PREC 19-Sep-2026 15:46:00 17:08:00 68.7 70 -1.85% NO2 Precision NO2_Diff PRECDIFF 19-Sep-2026 17:15:00 17:15:05 68 68.702 -.99% NOx NOx_Auto NO-PREC 19-Sep-2026 15:46:00 16:11:00 69.6 70 -.51% Ozone O3_Auto ZERO 19-Sep-2026 22:50:00 23:20:00 0 0.0 0.00 PREC 19-Sep-2026 22:50:00 23:50:00 0.068 0.07 -2.4% SO2 SO2_Auto ZERO 19-Sep-2026 19:46:00 20:11:00 0 0.0 .07 SPAN 19-Sep-2026 19:46:00 20:36:00 88.2 90 -1.99% PREC 19-Sep-2026 19:46:00 21:01:00 39 40 -2.41% Date Printed: 9/20/2026 01:30 Daily Summary Report Site: Hattie Avenue (B) 9/19/2026 Interval: 001h PM2.5 PM10 STP PM Coarse Time ug/m3 ug/m3 ug/m3 00:00 11.9 22.3 9.9 01:00 10.6 20.4 9.3 02:00 9.9 18.2 7.9 03:00 10.0 17.3 6.9 04:00 10.0 16.6 6.3 05:00 8.9 15.3 6.1 06:00 8.5 14.6 5.8 07:00 8.8 14.4 5.3 08:00 10.5 16.6 5.7 09:00 11.0 17.8 6.3 10:00 12.5 19.8 6.8 11:00 11.7 18.0 5.7 12:00 9.9 16.5 5.9 13:00 9.0 16.1 6.4 14:00 8.7 15.3 5.9 15:00 8.8 15.0 5.5 16:00 8.9 14.6 5.0 17:00 8.8 15.2 5.7 18:00 8.8 15.4 6.0 19:00 8.2 14.5 5.8 20:00 9.0 16.5 7.1 21:00 10.2 17.5 6.8 22:00 10.4 17.5 6.7 23:00 10.1 16.7 6.1 Average 9.7 16.7 6.4 Max 12.5 22.3 9.9 Max Hour 10:00 00:00 00:00 Min 8.2 14.4 5.0 Count 24 24 24 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error 0.0 -2.41% Date Printed: 9/20/2026 01:30 Daily Summary Report Site: Union Cross 9/19/2026 Interval: 001h Ozone Barometric Pres. Temperature (°F) Dew Point (°F) Time ppm mmHg DegF DegF 00:00 .009 738.2 71.4 71.1 01:00 .012 737.9 71.4 71.2 02:00 .013 737.6 71.1 71.0 03:00 .015 737.5 70.8 70.5 04:00 .020 737.5 70.7 69.9 05:00 .018 737.5 70.3 69.6 06:00 .017 737.9 70.1 69.5 07:00 .020 738.2 70.8 70.0 08:00 .026 738.5 71.6 70.0 09:00 .030 738.9 72.4 69.7 10:00 .034 738.9 74.0 69.9 11:00 .042 738.8 75.7 69.6 12:00 .050 738.3 79.6 69.5 13:00 .051 737.7 81.9 69.5 14:00 .051 737.2 83.1 69.0 15:00 .049 736.6 82.4 69.3 16:00 .049 736.4 82.9 69.0 17:00 .046 736.6 82.1 68.9 18:00 .037 736.9 79.0 68.5 19:00 .033 737.3 77.2 68.2 20:00 .024 738.0 75.6 68.2 21:00 .016 738.1 74.9 68.8 22:00 .027 C 737.6 74.9 68.0 23:00 C 737.4 73.6 67.9 Average .029 737.7 75.3 69.4 Max .051 738.9 83.1 71.2 Max Hour 14:00 10:00 14:00 01:00 Min .009 736.4 70.1 67.9 Count 23 24 24 24 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error Ozone O3_Auto ZERO 19-Sep-2026 22:50:00 23:20:00 0 0.0 0.00 PREC 19-Sep-2026 22:50:00 23:50:00 0.069 0.07 -.71% 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