Date Printed: 9/21/2026 01:30 Daily Summary Report Site: Clemmons Middle 9/20/2026 Interval: 001h Ozone PM2.5 PM10 LC PM Coarse Time ppm ug/m3 ug/m3 ug/m3 00:00 .017 11.1 20.2 9.1 01:00 .013 11.5 22.8 11.3 02:00 .011 11.5 23.8 12.2 03:00 .015 12.1 23.4 11.2 04:00 .008 12.3 24.1 11.7 05:00 .007 12.6 24.7 12.0 06:00 .005 B 12.0 23.4 11.4 07:00 .008 11.2 21.4 10.1 08:00 .020 9.0 15.5 6.5 09:00 .031 6.6 12.7 6.0 10:00 .035 6.1 11.7 5.6 11:00 .037 6.5 12.3 5.7 12:00 .041 6.6 11.9 5.3 13:00 .042 6.5 12.4 5.8 14:00 .042 6.7 12.1 5.3 15:00 .046 6.7 12.1 5.3 16:00 .041 6.5 12.8 6.3 17:00 .031 6.7 15.3 8.6 18:00 .024 6.6 13.3 6.7 19:00 .018 B 7.7 16.7 8.9 20:00 .016 8.0 16.1 8.0 21:00 .015 7.8 16.1 8.3 22:00 .011 C 8.4 20.5 12.0 23:00 B 8.7 18.5 9.7 Average .023 8.7 17.2 8.4 Max .046 12.6 24.7 12.2 Max Hour 15:00 05:00 05:00 02:00 Min .005 6.1 11.7 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 20-Sep-2026 22:50:00 23:20:00 -0.001 0.0 0.00 PREC 20-Sep-2026 22:50:00 23:50:00 0.068 0.07 -2.85% Date Printed: 9/21/2026 01:30 Daily Summary Report Site: Hattie Avenue (A) 9/20/2026 Interval: 001h Ozone NO NO2 NOx SO2 Time ppm ppb ppb ppb ppb 00:00 .030 .1 3.7 3.8 .2 01:00 .028 .2 3.7 3.9 .2 02:00 .026 .2 4.0 4.3 .3 03:00 .023 .4 4.5 4.9 .3 04:00 .019 .3 5.3 5.6 .3 05:00 .019 .3 4.4 4.7 .2 06:00 .017 .3 4.3 4.7 .2 07:00 .018 .7 4.3 5.0 .2 08:00 .027 .7 3.4 4.2 .3 09:00 .037 .5 2.3 2.8 .3 10:00 .038 .4 2.3 2.8 .3 11:00 .042 .3 2.1 2.5 .3 12:00 .043 .5 2.4 2.9 .3 13:00 .046 .2 1.9 2.1 .3 14:00 .046 .3 2.2 2.5 .3 15:00 .050 .1 C 1.9 C 2.1 C .3 16:00 .046 C C C .3 17:00 .041 .2 C 5.0 C 5.3 C .3 18:00 .038 .0 5.9 6.0 .3 19:00 .027 .1 12.7 12.9 .2 C 20:00 .024 .2 13.9 14.2 C 21:00 .025 .1 7.8 8.0 .3 C 22:00 .025 C .1 8.4 8.5 .2 23:00 C .1 5.0 5.2 .2 Average .031 .2 4.8 5.1 .2 Max .050 .7 13.9 14.2 .3 Max Hour 15:00 08:00 20:00 20:00 21:00 Min .017 .0 1.9 2.1 .2 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 20-Sep-2026 15:46:00 16:11:00 69.7 70 -.42% GPT-PS 20-Sep-2026 15:46:00 16:18:00 0.5 0.0 .51 GPTZ 20-Sep-2026 15:46:00 16:38:00 225.4 225 .2% GPT-PREC 20-Sep-2026 15:46:00 17:08:00 157 155 1.33% NO2 GPT-PREC 20-Sep-2026 15:46:00 17:08:00 68.7 70 -1.75% NO2 Precision NO2_Diff PRECDIFF 20-Sep-2026 17:15:00 17:15:05 68.3 68.772 -.56% NOx NOx_Auto NO-PREC 20-Sep-2026 15:46:00 16:11:00 69.6 70 -.52% Ozone O3_Auto ZERO 20-Sep-2026 22:50:00 23:20:00 0.001 0.0 0.00 PREC 20-Sep-2026 22:50:00 23:50:00 0.068 0.07 -2.85% SO2 SO2_Auto ZERO 20-Sep-2026 19:46:00 20:11:00 0.1 0.0 .11 SPAN 20-Sep-2026 19:46:00 20:36:00 88.4 90 -1.73% PREC 20-Sep-2026 19:46:00 21:01:00 38.9 40 -2.65% Date Printed: 9/21/2026 01:30 Daily Summary Report Site: Hattie Avenue (B) 9/20/2026 Interval: 001h PM2.5 PM10 STP PM Coarse Time ug/m3 ug/m3 ug/m3 00:00 10.4 17.0 6.1 01:00 10.1 17.0 6.4 02:00 11.8 19.3 7.1 03:00 13.5 21.4 7.5 04:00 13.0 20.2 6.8 05:00 11.0 17.9 6.5 06:00 10.7 17.3 6.2 07:00 10.5 17.9 6.9 08:00 8.5 15.6 6.7 09:00 6.4 12.3 5.4 10:00 6.5 12.7 5.7 11:00 6.8 11.9 4.6 12:00 7.1 14.3 6.6 13:00 7.2 15.2 7.4 14:00 6.7 12.1 4.8 15:00 6.2 11.6 4.8 16:00 6.7 16.0 8.5 17:00 6.7 13.8 6.5 18:00 7.1 15.1 7.3 19:00 9.3 16.4 6.5 20:00 9.3 15.9 6.1 21:00 8.0 15.4 6.9 22:00 8.2 14.4 5.8 23:00 8.1 14.2 5.7 Average 8.7 15.6 6.3 Max 13.5 21.4 8.5 Max Hour 03:00 03:00 16:00 Min 6.2 11.6 4.6 Count 24 24 24 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error 0.0 -2.65% Date Printed: 9/21/2026 01:30 Daily Summary Report Site: Union Cross 9/20/2026 Interval: 001h Ozone Barometric Pres. Temperature (°F) Dew Point (°F) Time ppm mmHg DegF DegF 00:00 .028 737.2 72.7 68.1 01:00 .027 737.0 71.8 67.7 02:00 .027 736.8 71.8 67.6 03:00 .025 736.7 71.2 67.8 04:00 .020 736.8 70.7 68.4 05:00 .020 736.7 70.4 68.7 06:00 .017 736.9 70.4 68.9 07:00 .017 737.0 71.1 69.2 08:00 .026 737.1 73.4 68.4 09:00 .036 737.2 76.6 66.3 10:00 .039 737.3 77.7 66.7 11:00 .040 737.0 78.9 68.3 12:00 .044 736.6 80.8 68.7 13:00 .044 735.9 81.2 69.5 14:00 .046 735.3 82.3 70.1 15:00 .048 734.7 83.3 70.8 16:00 .048 734.7 84.0 71.3 17:00 .039 734.8 81.6 71.4 18:00 .030 735.0 79.6 71.0 19:00 .023 735.1 77.7 71.0 20:00 .018 735.2 76.1 71.4 21:00 .013 735.3 75.2 71.0 22:00 .009 C 735.4 73.9 71.4 23:00 C 735.4 73.4 69.8 Average .029 736.1 76.0 69.3 Max .048 737.3 84.0 71.4 Max Hour 16:00 10:00 16:00 22:00 Min .009 734.7 70.4 66.3 Count 23 24 24 24 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error Ozone O3_Auto ZERO 20-Sep-2026 22:50:00 23:20:00 0 0.0 0.00 PREC 20-Sep-2026 22:50:00 23:50:00 0.069 0.07 -.43% 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