Date Printed: 3/12/2026 01:30 Daily Summary Report Site: Clemmons Middle 3/11/2026 Interval: 001h Ozone PM2.5 PM10 LC PM Coarse Time ppm ug/m3 ug/m3 ug/m3 00:00 .017 8.4 14.3 5.8 01:00 .023 9.5 15.3 5.8 02:00 .014 9.1 14.5 5.4 03:00 .015 9.2 14.8 5.6 04:00 .017 9.3 15.0 5.6 05:00 .017 9.0 14.7 5.7 06:00 .012 9.1 15.9 6.7 07:00 .011 B 8.9 17.0 8.1 08:00 .013 10.4 20.2 9.7 09:00 .021 6.6 13.5 6.8 10:00 .026 9.7 16.7 7.0 11:00 .033 10.9 17.8 6.8 12:00 .035 8.5 15.3 6.7 13:00 .038 6.6 13.6 7.0 14:00 .039 6.0 14.1 8.0 15:00 .039 4.7 11.3 6.6 16:00 .037 3.7 12.8 9.0 17:00 .034 4.1 11.5 7.3 18:00 .031 4.6 12.0 7.4 19:00 .031 4.4 10.5 6.0 20:00 .032 5.1 12.2 7.1 21:00 .034 6.2 12.7 6.5 22:00 .035 C 7.8 14.8 6.9 23:00 B 17.4 26.7 9.2 Average .026 7.8 14.8 6.9 Max .039 17.4 26.7 9.7 Max Hour 15:00 23:00 23:00 08:00 Min .011 3.7 10.5 5.4 Count 23 24 24 24 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error Ozone O3_Auto ZERO 11-Mar-2026 22:50:00 23:20:00 0 0.0 0.00 PREC 11-Mar-2026 22:50:00 23:50:00 0.069 0.07 -.62% Date Printed: 3/12/2026 01:30 Daily Summary Report Site: Hattie Avenue (A) 3/11/2026 Interval: 001h Ozone NO NO2 NOx SO2 Time ppm ppb ppb ppb ppb 00:00 .023 .4 11.6 12.1 .2 01:00 .021 .3 12.9 13.2 1.7 02:00 .023 .2 6.7 6.9 .7 03:00 .021 .2 5.9 6.2 .2 04:00 .018 .3 7.0 7.3 .1 05:00 .015 .3 9.1 9.5 .1 06:00 .015 .3 7.8 8.2 .1 07:00 D 1.0 8.0 9.1 .1 08:00 B 1.6 5.8 7.4 .1 09:00 .019 1.4 4.2 5.6 .1 10:00 .023 1.0 3.4 4.5 .2 11:00 .028 1.8 2.9 4.8 .2 D 12:00 .032 .4 2.1 2.5 D 13:00 .033 .5 2.2 2.7 D 14:00 .035 .4 2.2 2.6 .1 15:00 .035 .3 C 2.3 C 2.6 C .1 16:00 .033 C C C .1 17:00 .030 .2 C 3.0 C 3.3 C .1 18:00 .027 .1 3.6 3.7 .1 19:00 .026 .1 3.9 4.0 .1 C 20:00 .028 .1 2.9 3.0 C 21:00 .031 .0 2.6 2.7 .1 C 22:00 .031 C .0 2.2 2.3 .1 23:00 C .0 1.9 1.9 .1 Average .026 .4 4.9 5.4 .2 Max .035 1.8 12.9 13.2 1.7 Max Hour 15:00 11:00 01:00 01:00 01:00 Min .015 .0 1.9 1.9 .1 Count 21 23 23 23 21 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error NO NOx_Auto NO-PREC 11-Mar-2026 15:46:00 16:11:00 68.1 70 -2.66% GPT-PS 11-Mar-2026 15:46:00 16:18:00 0.5 0.0 .52 GPTZ 11-Mar-2026 15:46:00 16:38:00 218.8 225 -2.74% GPT-PREC 11-Mar-2026 15:46:00 17:08:00 149.4 155 -3.6% NO2 GPT-PREC 11-Mar-2026 15:46:00 17:08:00 69.6 70 -.47% NO2 Precision NO2_Diff PRECDIFF 11-Mar-2026 17:15:00 17:15:05 69.4 69.668 -.36% NOx NOx_Auto NO-PREC 11-Mar-2026 15:46:00 16:11:00 68.4 70 -2.28% Ozone O3_Auto ZERO 11-Mar-2026 22:50:00 23:20:00 0 0.0 0.00 PREC 11-Mar-2026 22:50:00 23:50:00 0.067 0.07 -3.28% SO2 SO2_Auto ZERO 11-Mar-2026 19:46:00 20:11:00 0 0.0 .02 SPAN 11-Mar-2026 19:46:00 20:36:00 87.8 90 -2.37% PREC 11-Mar-2026 19:46:00 21:01:00 38.7 40 -3.22% Date Printed: 3/12/2026 01:30 Daily Summary Report Site: Hattie Avenue (B) 3/11/2026 Interval: 001h PM2.5 PM10 STP PM Coarse Time ug/m3 ug/m3 ug/m3 00:00 9.0 16.1 6.9 01:00 9.7 16.8 6.9 02:00 9.1 15.2 5.9 03:00 9.8 16.7 6.7 04:00 9.9 16.5 6.4 05:00 9.6 16.6 6.8 06:00 9.8 16.0 6.0 07:00 10.1 18.1 7.7 08:00 9.3 16.6 7.0 09:00 7.4 15.0 7.1 10:00 10.1 18.0 7.2 11:00 13.3 31.1 16.5 12:00 9.1 17.4 7.5 13:00 7.3 16.8 8.6 14:00 6.3 16.4 9.2 15:00 5.3 14.5 8.3 16:00 3.8 12.0 7.5 17:00 4.1 12.2 7.6 18:00 5.0 14.5 8.9 19:00 5.0 13.6 8.0 20:00 5.2 13.3 7.5 21:00 6.4 14.0 7.0 22:00 7.6 15.6 7.4 23:00 15.4 24.0 7.7 Average 8.2 16.5 7.7 Max 15.4 31.1 16.5 Max Hour 23:00 11:00 11:00 Min 3.8 12.0 5.9 Count 24 24 24 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error 0.0 -3.22% Date Printed: 3/12/2026 01:30 Daily Summary Report Site: Union Cross 3/11/2026 Interval: 001h Ozone Barometric Pres. Temperature (°F) Dew Point (°F) Time ppm mmHg DegF DegF 00:00 .029 737.0 67.5 52.4 01:00 .033 736.7 67.4 53.3 02:00 .027 736.4 67.0 55.6 03:00 .023 736.2 67.4 57.6 04:00 .020 736.1 66.1 57.8 05:00 .021 736.1 65.4 58.7 06:00 .020 736.2 65.4 59.5 07:00 .019 D 736.3 66.3 60.4 08:00 D 736.3 68.7 61.7 09:00 .023 D 736.2 72.9 62.7 10:00 .027 736.2 74.8 62.8 11:00 .033 735.8 78.6 62.8 12:00 .035 735.0 80.6 61.7 13:00 .037 733.9 83.5 61.3 14:00 .037 733.3 84.0 60.7 15:00 .038 732.8 84.6 60.1 16:00 .036 732.3 83.5 58.2 17:00 .033 732.2 81.5 57.3 18:00 .029 732.2 79.8 57.0 19:00 .029 732.3 78.4 56.6 20:00 .032 732.4 78.1 56.8 21:00 .037 732.1 77.3 56.8 22:00 .037 C 731.7 76.2 57.0 23:00 C 731.2 75.7 57.4 Average .029 734.4 74.6 58.5 Max .038 737.0 84.6 62.8 Max Hour 15:00 00:00 15:00 11:00 Min .019 731.2 65.4 52.4 Count 22 24 24 24 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error Ozone O3_Auto ZERO 11-Mar-2026 22:50:00 23:20:00 0 0.0 0.00 PREC 11-Mar-2026 22:50:00 23:50:00 0.07 0.07 -.44% 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