Date Printed: 4/27/2026 01:30 Daily Summary Report Site: Clemmons Middle 4/26/2026 Interval: 001h Ozone PM2.5 PM10 LC PM Coarse Time ppm ug/m3 ug/m3 ug/m3 00:00 .010 6.9 15.1 8.1 01:00 .008 7.0 13.9 6.8 02:00 .009 7.4 13.8 6.3 03:00 .010 7.6 15.2 7.5 04:00 .010 7.5 15.5 8.0 05:00 .011 B 7.9 15.3 7.4 06:00 .017 7.8 13.7 5.9 07:00 .021 7.5 12.7 5.2 08:00 .023 6.6 10.1 3.4 09:00 .030 4.6 7.9 3.2 10:00 .032 4.2 7.8 3.5 11:00 .029 4.5 8.9 4.3 12:00 .032 5.1 9.1 3.9 13:00 .037 4.9 8.9 4.0 14:00 .038 4.9 8.5 3.6 15:00 .038 4.9 9.1 4.2 16:00 .040 4.6 8.1 3.4 17:00 .039 4.2 7.4 3.2 18:00 .038 4.0 8.0 4.0 19:00 .036 3.8 7.4 3.6 20:00 .035 3.4 7.1 3.7 21:00 .034 B 3.1 6.5 3.4 22:00 .036 C 2.7 5.5 2.7 23:00 C 2.4 6.1 3.7 Average .026 5.3 10.0 4.7 Max .040 7.9 15.5 8.1 Max Hour 16:00 05:00 04:00 00:00 Min .008 2.4 5.5 2.7 Count 23 24 24 24 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error Ozone O3_Auto ZERO 26-Apr-2026 22:50:00 23:20:00 0.001 0.0 0.00 PREC 26-Apr-2026 22:50:00 23:50:00 0.071 0.07 2.12% Date Printed: 4/27/2026 01:30 Daily Summary Report Site: Hattie Avenue (A) 4/26/2026 Interval: 001h Ozone NO NO2 NOx SO2 Time ppm ppb ppb ppb ppb 00:00 .009 .8 8.0 8.8 .1 01:00 .007 .7 7.4 8.1 .1 02:00 .008 .7 7.0 7.7 .0 03:00 .009 .8 4.6 5.4 .0 04:00 .010 .8 3.9 4.8 .0 05:00 .014 .4 3.4 3.8 .0 06:00 .021 .3 1.9 2.2 .0 07:00 .021 .8 4.4 5.3 .0 08:00 .025 .4 1.7 2.1 .0 09:00 .028 .3 1.2 1.5 .0 10:00 .027 .3 1.2 1.5 .0 11:00 .024 .4 1.3 1.8 .0 12:00 .030 .5 1.2 1.8 .0 13:00 .034 .3 1.0 1.4 .0 14:00 .035 .3 1.0 1.4 .0 15:00 .035 .3 C 1.1 C 1.4 C .0 16:00 .037 C C C .0 17:00 .036 .3 C 1.3 C 1.6 C .0 18:00 .034 .2 1.9 2.2 .0 19:00 .032 .3 1.9 2.2 .0 C 20:00 .032 .1 1.6 1.7 C 21:00 .031 .1 1.4 1.5 .0 C 22:00 .034 C .1 1.0 1.1 .0 23:00 C .1 1.0 1.1 .0 Average .024 .4 2.6 3.0 .0 Max .037 .8 8.0 8.8 .1 Max Hour 16:00 07:00 00:00 00:00 01:00 Min .007 .1 1.0 1.1 .0 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 26-Apr-2026 15:46:00 16:11:00 66.8 70 -4.49% GPT-PS 26-Apr-2026 15:46:00 16:18:00 0.4 0.0 .42 GPTZ 26-Apr-2026 15:46:00 16:38:00 216.1 225 -3.94% GPT-PREC 26-Apr-2026 15:46:00 17:08:00 152 155 -1.88% NO2 GPT-PREC 26-Apr-2026 15:46:00 17:08:00 65.1 70 -6.96% NO2 Precision NO2_Diff PRECDIFF 26-Apr-2026 17:15:00 17:15:05 64 65.126 -1.64% NOx NOx_Auto NO-PREC 26-Apr-2026 15:46:00 16:11:00 66.8 70 -4.45% Ozone O3_Auto ZERO 26-Apr-2026 22:50:00 23:20:00 0 0.0 0.00 PREC 26-Apr-2026 22:50:00 23:50:00 0.067 0.07 -3.77% SO2 SO2_Auto ZERO 26-Apr-2026 19:46:00 20:11:00 0 0.0 -.03 SPAN 26-Apr-2026 19:46:00 20:36:00 85.1 90 -5.35% PREC 26-Apr-2026 19:46:00 21:01:00 37.6 40 -5.99% Date Printed: 4/27/2026 01:30 Daily Summary Report Site: Hattie Avenue (B) 4/26/2026 Interval: 001h PM2.5 PM10 STP PM Coarse Time ug/m3 ug/m3 ug/m3 00:00 8.4 16.0 7.4 01:00 8.3 16.6 8.1 02:00 9.5 17.8 8.1 03:00 8.7 17.6 8.7 04:00 8.2 15.7 7.4 05:00 9.0 14.6 5.6 06:00 8.8 14.1 5.2 07:00 7.4 11.1 3.6 08:00 6.1 9.9 3.7 09:00 4.4 8.3 3.9 10:00 4.4 8.4 4.0 11:00 4.9 8.9 3.9 12:00 4.9 10.6 5.6 13:00 5.0 11.3 6.1 14:00 4.9 11.3 6.2 15:00 4.9 10.3 5.4 16:00 4.4 8.7 4.1 17:00 4.3 9.2 4.8 18:00 4.0 9.3 5.2 19:00 3.8 8.5 4.8 20:00 3.5 7.5 4.0 21:00 3.2 7.4 4.3 22:00 2.8 7.7 5.0 23:00 2.4 7.4 5.2 Average 5.6 11.1 5.4 Max 9.5 17.8 8.7 Max Hour 02:00 02:00 03:00 Min 2.4 7.4 3.6 Count 24 24 24 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error 0.0 -5.99% Date Printed: 4/27/2026 01:30 Daily Summary Report Site: Union Cross 4/26/2026 Interval: 001h Ozone Barometric Pres. Temperature (°F) Dew Point (°F) Time ppm mmHg DegF DegF 00:00 .010 731.8 59.7 59.6 01:00 .007 731.7 59.7 59.7 02:00 .014 731.8 59.8 59.8 03:00 .012 732.3 59.8 59.8 04:00 .009 732.7 59.7 59.7 05:00 .013 732.9 59.8 59.8 06:00 .020 733.5 59.8 59.6 07:00 .027 734.2 60.1 58.8 08:00 .027 734.5 59.5 57.1 09:00 .026 735.1 58.5 55.7 10:00 .025 735.7 58.3 54.2 11:00 .027 736.1 57.8 52.4 12:00 .030 736.0 59.4 51.7 13:00 .035 735.9 61.9 51.1 14:00 .035 736.0 61.2 49.8 15:00 .036 736.0 61.1 49.3 16:00 .037 736.2 62.2 49.3 17:00 .038 736.5 61.6 48.5 18:00 .037 736.8 60.5 47.8 19:00 .034 737.6 58.1 47.1 20:00 .033 738.4 55.3 45.5 21:00 .033 739.1 53.4 44.3 22:00 .035 C 739.5 53.1 43.1 23:00 C 740.0 51.8 41.9 Average .026 735.4 58.8 52.7 Max .038 740.0 62.2 59.8 Max Hour 17:00 23:00 16:00 05:00 Min .007 731.7 51.8 41.9 Count 23 24 24 24 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error Ozone O3_Auto ZERO 26-Apr-2026 22:50:00 23:20:00 0 0.0 0.00 PREC 26-Apr-2026 22:50:00 23:50:00 0.069 0.07 .14% 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