Date Printed: 9/19/2026 01:30 Daily Summary Report Site: Clemmons Middle 9/18/2026 Interval: 001h Ozone PM2.5 PM10 LC PM Coarse Time ppm ug/m3 ug/m3 ug/m3 00:00 .029 11.7 22.2 10.5 01:00 .026 11.2 22.3 11.0 02:00 .021 11.8 24.2 12.4 03:00 .016 11.1 19.8 8.7 04:00 .009 11.6 22.0 10.3 05:00 .004 11.6 23.3 11.6 06:00 .004 12.5 37.5 25.0 07:00 .007 12.2 48.7 36.4 08:00 .017 10.6 21.9 11.3 09:00 .036 11.6 29.4 17.8 10:00 .049 12.5 22.9 10.4 11:00 .052 B 13.3 24.5 11.1 12:00 .053 14.1 28.4 14.3 13:00 .040 13.7 29.6 15.9 14:00 .039 10.5 22.1 11.5 15:00 .036 5.6 15.1 9.4 16:00 .030 7.9 16.0 8.1 17:00 .023 8.4 18.1 9.7 18:00 .019 8.9 20.8 11.9 19:00 .014 9.2 20.4 11.0 20:00 .007 B 10.0 26.7 16.6 21:00 .005 9.9 24.8 14.9 22:00 .005 C 10.9 29.1 18.2 23:00 C 11.1 32.7 21.5 Average .023 10.9 25.1 14.1 Max .053 14.1 48.7 36.4 Max Hour 12:00 12:00 07:00 07:00 Min .004 5.6 15.1 8.1 Count 23 24 24 24 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error Ozone O3_Auto ZERO 18-Sep-2026 22:50:00 23:20:00 0 0.0 0.00 PREC 18-Sep-2026 22:50:00 23:50:00 0.068 0.07 -2.46% Date Printed: 9/19/2026 01:30 Daily Summary Report Site: Hattie Avenue (A) 9/18/2026 Interval: 001h Ozone NO NO2 NOx SO2 Time ppm ppb ppb ppb ppb 00:00 .051 .1 6.6 6.7 1.0 01:00 .050 .1 6.0 6.1 .4 02:00 .043 .2 6.4 6.7 .4 03:00 .037 .2 6.7 6.9 .3 04:00 .026 .3 7.4 7.7 .2 05:00 .018 .3 10.1 10.5 .2 06:00 .011 1.3 12.4 13.7 .2 07:00 .012 6.5 15.2 21.8 .3 08:00 .029 1.9 8.1 10.1 .3 09:00 .048 .4 3.6 4.1 .2 10:00 .056 .2 2.7 2.9 .3 11:00 .060 .1 2.1 2.3 .4 12:00 .050 .3 2.5 2.9 .3 13:00 .046 .4 3.2 3.7 .2 14:00 .041 .1 3.8 4.0 .1 15:00 .033 .4 C 6.7 C 7.1 C .1 16:00 .030 C C C .2 17:00 .021 1.7 C 11.9 C 13.6 C .2 18:00 .019 .8 9.4 10.3 .2 19:00 .011 .9 10.2 11.2 .2 C 20:00 .008 1.2 12.0 13.3 C 21:00 .008 1.0 10.0 11.1 .3 C 22:00 .008 C .9 9.3 10.2 .2 23:00 C 1.1 9.0 10.2 .2 Average .031 .8 7.6 8.5 .2 Max .060 6.5 15.2 21.8 1.0 Max Hour 11:00 07:00 07:00 07:00 00:00 Min .008 .1 2.1 2.3 .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 18-Sep-2026 15:46:00 16:11:00 69.6 70 -.51% GPT-PS 18-Sep-2026 15:46:00 16:18:00 0.5 0.0 .57 GPTZ 18-Sep-2026 15:46:00 16:38:00 225.1 225 .08% GPT-PREC 18-Sep-2026 15:46:00 17:08:00 157.3 155 1.51% NO2 GPT-PREC 18-Sep-2026 15:46:00 17:08:00 68.6 70 -1.92% NO2 Precision NO2_Diff PRECDIFF 18-Sep-2026 17:15:00 17:15:05 67.8 68.656 -1.19% NOx NOx_Auto NO-PREC 18-Sep-2026 15:46:00 16:11:00 69.6 70 -.53% Ozone O3_Auto ZERO 18-Sep-2026 22:50:00 23:20:00 0 0.0 0.00 PREC 18-Sep-2026 22:50:00 23:50:00 0.067 0.07 -2.8% SO2 SO2_Auto ZERO 18-Sep-2026 19:46:00 20:11:00 0.1 0.0 .12 SPAN 18-Sep-2026 19:46:00 20:36:00 88.3 90 -1.85% PREC 18-Sep-2026 19:46:00 21:01:00 39 40 -2.25% Date Printed: 9/19/2026 01:30 Daily Summary Report Site: Hattie Avenue (B) 9/18/2026 Interval: 001h PM2.5 PM10 STP PM Coarse Time ug/m3 ug/m3 ug/m3 00:00 11.2 24.0 12.1 01:00 11.1 22.4 10.6 02:00 11.7 23.2 10.9 03:00 12.1 21.1 8.5 04:00 11.3 19.2 7.5 05:00 10.7 17.0 5.9 06:00 11.3 21.3 9.5 07:00 11.9 28.2 15.5 08:00 10.7 23.0 11.2 09:00 12.0 23.6 10.4 10:00 13.1 29.0 14.3 11:00 13.6 27.7 12.5 12:00 12.7 26.6 12.8 13:00 10.9 21.3 9.7 14:00 10.0 19.1 8.6 15:00 8.1 16.6 8.1 16:00 6.8 13.4 6.3 17:00 7.2 14.4 6.9 18:00 8.1 17.7 9.2 19:00 9.6 19.4 9.4 20:00 9.3 20.4 10.7 21:00 10.2 23.0 12.3 22:00 11.6 25.7 13.6 23:00 12.6 25.2 12.0 Average 10.7 21.7 10.3 Max 13.6 29.0 15.5 Max Hour 11:00 10:00 07:00 Min 6.8 13.4 5.9 Count 24 24 24 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error 0.0 -2.25% Date Printed: 9/19/2026 01:30 Daily Summary Report Site: Union Cross 9/18/2026 Interval: 001h Ozone Barometric Pres. Temperature (°F) Dew Point (°F) Time ppm mmHg DegF DegF 00:00 .050 740.1 77.3 64.7 01:00 .045 739.9 77.2 64.3 02:00 .044 739.5 75.5 65.1 03:00 .039 739.4 74.3 65.3 04:00 .030 739.3 72.4 66.0 05:00 .020 739.5 71.6 66.6 06:00 .016 739.7 71.6 67.4 07:00 .017 739.8 74.4 68.5 08:00 .020 740.0 80.3 70.6 09:00 .046 740.1 85.7 71.5 10:00 .059 739.6 88.5 71.7 11:00 .060 739.2 89.9 72.5 12:00 .050 738.8 81.3 71.9 13:00 .045 738.4 78.8 70.6 14:00 .035 738.3 73.5 70.2 15:00 .031 738.1 72.7 71.5 16:00 .029 737.8 72.6 71.2 17:00 .021 737.6 73.0 71.6 18:00 .016 737.8 72.9 71.7 19:00 .013 738.0 72.4 71.4 20:00 .007 738.2 72.1 71.5 21:00 .006 738.4 71.8 71.6 22:00 .003 C 738.4 71.6 71.3 23:00 C 738.3 71.4 71.1 Average .030 738.9 75.9 69.5 Max .060 740.1 89.9 72.5 Max Hour 11:00 09:00 11:00 11:00 Min .003 737.6 71.4 64.3 Count 23 24 24 24 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error Ozone O3_Auto ZERO 18-Sep-2026 22:50:00 23:20:00 0 0.0 0.00 PREC 18-Sep-2026 22:50:00 23:50:00 0.069 0.07 -.41% 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