Date Printed: 6/11/2026 01:30 Daily Summary Report Site: Clemmons Middle 6/10/2026 Interval: 001h Ozone PM2.5 PM10 LC PM Coarse Time ppm ug/m3 ug/m3 ug/m3 00:00 .013 B 13.9 20.6 6.7 01:00 .007 13.2 19.3 6.0 02:00 .006 13.1 18.3 5.2 03:00 .008 14.1 20.3 6.1 04:00 .007 14.3 20.0 5.6 05:00 .007 13.7 22.5 8.7 06:00 .008 13.0 26.1 13.0 07:00 .010 11.6 18.2 6.5 08:00 D 10.6 17.1 6.4 09:00 .026 D 11.2 18.6 7.4 10:00 .034 12.8 20.9 8.1 11:00 .039 10.3 22.0 11.6 12:00 .045 9.4 16.2 6.8 13:00 .046 7.9 14.8 6.8 14:00 .048 7.9 14.7 6.8 15:00 .049 8.1 16.9 8.7 16:00 .048 8.4 18.3 9.9 17:00 .046 B 8.0 16.1 8.0 18:00 .044 8.1 15.2 7.0 19:00 .040 8.7 16.2 7.4 20:00 .043 7.8 13.1 5.3 21:00 .039 7.8 14.2 6.3 22:00 .036 C 8.0 13.9 5.9 23:00 C 8.3 14.3 6.0 Average .029 10.4 17.8 7.3 Max .049 14.3 26.1 13.0 Max Hour 15:00 04:00 06:00 06:00 Min .006 7.8 13.1 5.2 Count 22 24 24 24 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error Ozone O3_Auto ZERO 10-Jun-2026 22:50:00 23:20:00 -0.001 0.0 0.00 PREC 10-Jun-2026 22:50:00 23:50:00 0.067 0.069 -2.26% Date Printed: 6/11/2026 01:30 Daily Summary Report Site: Hattie Avenue (A) 6/10/2026 Interval: 001h Ozone NO NO2 NOx SO2 Time ppm ppb ppb ppb ppb 00:00 .024 .2 5.2 5.5 -.6 01:00 .024 .2 4.6 4.9 -.5 02:00 .021 .3 4.6 4.9 -.5 03:00 .020 .3 4.9 5.2 -.5 04:00 .017 .3 5.2 5.6 -.5 05:00 .013 .7 7.2 8.0 -.5 06:00 .012 1.1 B 8.3 B 9.5 B -.5 07:00 .012 B B B -.5 08:00 .015 B B B -.4 09:00 .028 B B B -.3 10:00 .036 B B B -.2 11:00 .044 .4 3.5 4.0 -.2 12:00 .048 .3 2.6 3.0 -.2 13:00 .050 .2 2.4 2.7 -.2 14:00 .051 .2 2.1 2.4 -.3 15:00 .055 .2 C 2.1 C 2.4 C -.3 16:00 .052 C C C -.3 17:00 .049 .2 C 2.4 C 2.7 C -.4 18:00 .047 .1 3.1 3.3 -.4 19:00 .043 .1 4.2 4.4 -.2 C 20:00 .043 .1 3.9 4.1 C 21:00 .042 .1 4.1 4.2 -.4 C 22:00 .039 C .1 3.7 3.9 -.5 23:00 C .1 4.0 4.2 -.4 Average .034 .2 4.1 4.4 -.3 Max .055 1.1 8.3 9.5 -.2 Max Hour 15:00 06:00 06:00 06:00 19:00 Min .012 .1 2.1 2.4 -.6 Count 23 19 19 19 23 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error NO NOx_Auto NO-PREC 10-Jun-2026 15:46:00 16:11:00 66.7 70 -4.71% GPT-PS 10-Jun-2026 15:46:00 16:18:00 0.4 0.0 .49 GPTZ 10-Jun-2026 15:46:00 16:38:00 215.1 225 -4.38% GPT-PREC 10-Jun-2026 15:46:00 17:08:00 150.1 155 -3.1% NO2 GPT-PREC 10-Jun-2026 15:46:00 17:08:00 65.9 70 -5.84% NO2 Precision NO2_Diff PRECDIFF 10-Jun-2026 17:15:00 17:15:05 64.9 65.915 -1.46% NOx NOx_Auto NO-PREC 10-Jun-2026 15:46:00 16:11:00 68 70 -2.81% Ozone O3_Auto ZERO 10-Jun-2026 22:50:00 23:20:00 0 0.0 0.00 PREC 10-Jun-2026 22:50:00 23:50:00 0.067 0.07 -3.19% SO2 SO2_Auto ZERO 10-Jun-2026 19:46:00 20:11:00 -0.6 0.0 -.62 SPAN 10-Jun-2026 19:46:00 20:36:00 87.7 90 -2.47% PREC 10-Jun-2026 19:46:00 21:01:00 38.6 40 -3.4% Date Printed: 6/11/2026 01:30 Daily Summary Report Site: Hattie Avenue (B) 6/10/2026 Interval: 001h PM2.5 PM10 STP PM Coarse Time ug/m3 ug/m3 ug/m3 00:00 16.5 23.9 6.9 01:00 16.2 24.5 7.8 02:00 16.6 24.0 6.9 03:00 17.3 26.1 8.2 04:00 17.0 25.1 7.6 05:00 17.2 25.8 8.1 06:00 15.9 23.8 7.4 07:00 14.2 20.8 6.2 08:00 13.7 21.4 7.1 09:00 12.4 20.5 7.3 10:00 13.1 20.9 6.9 11:00 13.9 21.9 7.2 12:00 11.1 19.9 7.8 13:00 10.0 20.1 8.9 14:00 9.1 19.7 9.5 15:00 9.3 19.9 9.4 16:00 9.6 19.1 8.4 17:00 9.3 17.6 7.4 18:00 9.4 18.1 7.8 19:00 10.0 16.8 6.0 20:00 9.9 17.1 6.4 21:00 9.6 15.9 5.6 22:00 9.6 16.0 5.8 23:00 10.1 17.7 7.0 Average 12.5 20.6 7.4 Max 17.3 26.1 9.5 Max Hour 03:00 03:00 14:00 Min 9.1 15.9 5.6 Count 24 24 24 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error 0.0 -3.4% Date Printed: 6/11/2026 01:30 Daily Summary Report Site: Union Cross 6/10/2026 Interval: 001h Ozone Barometric Pres. Temperature (°F) Dew Point (°F) Time ppm mmHg DegF DegF 00:00 .019 738.2 69.8 68.0 01:00 .013 738.2 69.3 68.0 02:00 .015 738.0 69.2 68.3 03:00 .014 737.9 69.6 69.1 04:00 .015 738.0 69.9 69.4 05:00 .014 738.2 69.8 69.2 06:00 .014 738.3 70.6 69.5 07:00 .019 738.3 72.0 69.4 08:00 .021 738.3 72.8 69.8 09:00 .029 737.8 75.9 69.9 10:00 .035 738.0 78.4 70.1 11:00 .038 737.9 79.5 70.4 12:00 .043 737.3 82.1 71.1 13:00 .044 736.7 84.2 70.6 14:00 .045 735.9 86.9 71.3 15:00 .048 735.3 86.6 71.2 16:00 .052 735.1 87.7 72.1 17:00 .051 734.7 87.2 71.3 18:00 .046 734.7 86.1 70.1 19:00 .044 735.1 83.6 70.2 20:00 .041 735.3 81.3 70.3 21:00 .041 735.7 79.2 69.5 22:00 .037 C 735.7 77.4 69.2 23:00 C 735.6 76.0 69.9 Average .032 736.8 77.7 69.9 Max .052 738.3 87.7 72.1 Max Hour 16:00 08:00 16:00 16:00 Min .013 734.7 69.2 68.0 Count 23 24 24 24 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error Ozone O3_Auto ZERO 10-Jun-2026 22:50:00 23:20:00 0 0.0 0.00 PREC 10-Jun-2026 22:50:00 23:50:00 0.07 0.07 .54% 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