Date Printed: 5/26/2026 01:30 Daily Summary Report Site: Clemmons Middle 5/25/2026 Interval: 001h Ozone PM2.5 PM10 LC PM Coarse Time ppm ug/m3 ug/m3 ug/m3 00:00 .007 7.3 17.1 9.8 01:00 .012 6.9 15.3 8.4 02:00 .032 3.8 33.6 29.7 03:00 .023 3.4 12.7 9.2 04:00 .016 3.6 9.9 6.3 05:00 .014 5.2 11.9 6.7 06:00 .016 6.0 13.4 7.4 07:00 .022 4.5 11.7 7.2 08:00 .026 B 2.9 7.9 5.0 09:00 .027 2.9 7.6 4.6 10:00 .028 3.5 8.3 4.7 11:00 .029 3.7 9.6 5.8 12:00 .033 3.6 9.1 5.5 13:00 .031 3.5 11.5 7.9 14:00 .033 3.5 8.9 5.4 15:00 .033 B 3.6 7.8 4.1 16:00 .033 B 3.7 7.7 4.0 17:00 .033 3.5 7.2 3.6 18:00 .030 4.1 8.8 4.7 19:00 .027 4.0 10.5 6.4 20:00 .027 3.3 8.0 4.6 21:00 .028 3.7 8.8 5.1 22:00 .026 C 3.6 9.6 6.0 23:00 C 2.5 9.0 6.4 Average .025 4.0 11.0 7.0 Max .033 7.3 33.6 29.7 Max Hour 17:00 00:00 02:00 02:00 Min .007 2.5 7.2 3.6 Count 23 24 24 24 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error Ozone O3_Auto ZERO 25-May-2026 22:50:00 23:20:00 0.001 0.0 0.00 PREC 25-May-2026 22:50:00 23:50:00 0.071 0.07 2.72% Date Printed: 5/26/2026 01:30 Daily Summary Report Site: Hattie Avenue (A) 5/25/2026 Interval: 001h Ozone NO NO2 NOx SO2 Time ppm ppb ppb ppb ppb 00:00 .009 .4 3.5 3.9 -.4 01:00 .015 .2 2.7 2.9 -.4 02:00 .015 .2 2.8 3.0 -.4 03:00 .013 .1 3.0 3.1 -.4 04:00 .014 .1 2.3 2.4 -.4 05:00 .013 .2 3.2 3.4 -.4 06:00 .012 .4 4.1 4.5 -.4 07:00 .021 .4 2.1 2.5 -.4 08:00 .023 .5 1.5 2.0 -.4 09:00 .024 .4 1.5 2.0 -.4 10:00 .026 .4 1.3 1.7 -.4 11:00 .028 .3 1.3 1.6 -.4 12:00 .030 .3 1.3 1.7 -.4 13:00 .031 .4 1.5 1.9 -.4 14:00 .033 .3 1.2 1.6 -.4 15:00 .033 .3 C 1.3 C 1.6 C -.4 16:00 .033 C C C -.4 17:00 .034 .3 C 2.4 C 2.8 C -.3 18:00 .030 .2 2.7 2.9 -.3 19:00 .025 .2 4.1 4.4 -.2 C 20:00 .025 .2 2.7 3.0 C 21:00 .026 .1 2.3 2.5 -.4 C 22:00 .031 C .1 1.7 1.8 -.4 23:00 C .1 1.7 1.8 -.4 Average .023 .2 2.2 2.5 -.3 Max .034 .5 4.1 4.5 -.2 Max Hour 17:00 08:00 19:00 06:00 19:00 Min .009 .1 1.2 1.6 -.4 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 25-May-2026 15:46:00 16:11:00 66.5 70 -4.9% GPT-PS 25-May-2026 15:46:00 16:18:00 0.5 0.0 .52 GPTZ 25-May-2026 15:46:00 16:38:00 215.3 225 -4.28% GPT-PREC 25-May-2026 15:46:00 17:08:00 150.4 155 -2.94% NO2 GPT-PREC 25-May-2026 15:46:00 17:08:00 65.3 70 -6.59% NO2 Precision NO2_Diff PRECDIFF 25-May-2026 17:15:00 17:15:05 64.9 65.384 -.7% NOx NOx_Auto NO-PREC 25-May-2026 15:46:00 16:11:00 66.7 70 -4.66% Ozone O3_Auto ZERO 25-May-2026 22:50:00 23:20:00 0 0.0 0.00 PREC 25-May-2026 22:50:00 23:50:00 0.067 0.07 -3.36% SO2 SO2_Auto ZERO 25-May-2026 19:46:00 20:11:00 -0.5 0.0 -.59 SPAN 25-May-2026 19:46:00 20:36:00 88.5 90 -1.57% PREC 25-May-2026 19:46:00 21:01:00 38.7 40 -3.05% Date Printed: 5/26/2026 01:30 Daily Summary Report Site: Hattie Avenue (B) 5/25/2026 Interval: 001h PM2.5 PM10 STP PM Coarse Time ug/m3 ug/m3 ug/m3 00:00 8.8 18.1 9.0 01:00 7.2 17.3 9.7 02:00 5.9 22.3 16.0 03:00 4.4 10.3 5.7 04:00 4.0 8.8 4.7 05:00 6.2 13.5 7.0 06:00 7.6 16.8 8.9 07:00 4.8 17.6 12.4 08:00 3.6 11.8 7.9 09:00 3.4 10.8 7.1 10:00 3.6 11.4 7.5 11:00 4.0 11.2 6.8 12:00 4.2 11.1 6.5 13:00 3.9 12.8 8.3 14:00 4.0 13.5 8.9 15:00 4.2 11.7 7.0 16:00 4.4 11.2 6.3 17:00 4.4 10.0 5.2 18:00 4.7 11.7 6.5 19:00 4.9 12.7 7.3 20:00 4.0 12.3 7.9 21:00 4.1 11.4 7.0 22:00 2.7 15.2 12.2 23:00 2.6 14.1 11.2 Average 4.6 13.2 8.2 Max 8.8 22.3 16.0 Max Hour 00:00 02:00 02:00 Min 2.6 8.8 4.7 Count 24 24 24 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error 0.0 -3.05% Date Printed: 5/26/2026 01:30 Daily Summary Report Site: Union Cross 5/25/2026 Interval: 001h Ozone Barometric Pres. Temperature (°F) Dew Point (°F) Time ppm mmHg DegF DegF 00:00 .017 738.7 68.7 67.7 01:00 .018 738.5 68.5 67.8 02:00 .014 738.4 68.3 68.2 03:00 .013 738.1 68.3 68.3 04:00 .014 738.2 68.8 68.8 05:00 .014 738.6 69.3 69.3 06:00 .015 738.9 69.6 69.6 07:00 .017 738.9 69.4 69.3 08:00 .023 739.1 70.5 68.8 09:00 .026 739.0 72.8 68.5 10:00 .029 739.2 74.4 68.5 11:00 .030 739.0 76.5 68.8 12:00 .031 738.3 78.4 69.3 13:00 .030 737.9 76.0 70.4 14:00 .035 737.5 78.2 71.3 15:00 .036 737.2 80.7 70.9 16:00 .034 737.1 80.8 70.8 17:00 .032 736.9 79.6 70.0 18:00 .028 737.1 78.3 70.1 19:00 .026 737.4 75.6 69.9 20:00 .026 738.1 74.0 69.2 21:00 .027 739.0 73.5 68.5 22:00 .027 C 739.0 72.7 67.5 23:00 C 738.8 70.8 66.6 Average .024 738.2 73.4 69.0 Max .036 739.2 80.8 71.3 Max Hour 15:00 10:00 16:00 14:00 Min .013 736.9 68.3 66.6 Count 23 24 24 24 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error Ozone O3_Auto ZERO 25-May-2026 22:50:00 23:20:00 0.001 0.0 0.00 PREC 25-May-2026 22:50:00 23:50:00 0.07 0.07 0.00% 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