Date Printed: 4/29/2026 01:30 Daily Summary Report Site: Clemmons Middle 4/28/2026 Interval: 001h Ozone PM2.5 PM10 LC PM Coarse Time ppm ug/m3 ug/m3 ug/m3 00:00 .047 5.1 11.6 6.5 01:00 .046 5.4 10.6 5.1 02:00 .043 5.7 9.8 4.0 03:00 .036 5.9 10.8 4.9 04:00 .028 B 6.0 10.1 4.1 05:00 .025 6.3 10.6 4.3 06:00 .023 B 7.4 13.0 5.5 07:00 .020 8.3 12.2 3.9 08:00 .024 9.5 12.5 3.0 09:00 .028 9.6 12.2 2.6 10:00 .030 9.4 13.0 3.5 11:00 .034 7.8 11.2 3.4 12:00 .037 6.9 10.6 3.6 13:00 .038 6.3 9.9 3.5 14:00 .038 6.3 9.9 3.6 15:00 .040 5.8 9.3 3.4 16:00 .041 6.0 10.2 4.1 17:00 .039 6.0 8.8 2.7 18:00 .035 5.8 9.1 3.2 19:00 .031 5.9 8.9 3.0 20:00 .030 6.0 8.9 2.9 21:00 .024 B 6.0 9.6 3.6 22:00 .017 B 6.1 10.0 3.9 23:00 C 6.2 10.5 4.2 Average .032 6.6 10.5 3.8 Max .047 9.6 13.0 6.5 Max Hour 00:00 09:00 10:00 00:00 Min .017 5.1 8.8 2.6 Count 23 24 24 24 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error Ozone O3_Auto ZERO 28-Apr-2026 22:50:00 23:20:00 0.001 0.0 0.00 PREC 28-Apr-2026 22:50:00 23:50:00 0.07 0.07 1.84% Date Printed: 4/29/2026 01:30 Daily Summary Report Site: Hattie Avenue (A) 4/28/2026 Interval: 001h Ozone NO NO2 NOx SO2 Time ppm ppb ppb ppb ppb 00:00 .046 .0 2.2 2.3 .0 01:00 .044 .1 2.1 2.2 .0 02:00 .043 .1 2.1 2.2 .0 03:00 .041 .1 2.5 2.6 .0 04:00 .037 .1 2.8 2.9 .0 05:00 .030 .1 5.0 5.1 .0 06:00 .021 .2 8.2 8.5 .0 07:00 D .5 6.7 7.3 .0 08:00 D .7 5.8 6.5 .0 09:00 .025 .6 4.3 4.9 .0 10:00 .027 D D D .0 11:00 .030 D D D .0 12:00 .032 D D D .0 13:00 .034 D D D .0 14:00 .034 D D D .0 15:00 .035 D D D .0 16:00 .038 .4 D 2.9 D 3.3 D .0 17:00 .037 .2 3.4 3.7 .0 18:00 .034 .2 3.5 3.7 .0 19:00 .029 .1 4.6 4.7 .0 C 20:00 .026 .1 4.6 4.8 C 21:00 .023 .1 5.3 5.5 .0 C 22:00 .017 C .2 6.9 7.2 .0 23:00 C .3 6.6 6.9 .0 Average .032 .2 4.4 4.6 .0 Max .046 .7 8.2 8.5 .0 Max Hour 00:00 08:00 06:00 06:00 23:00 Min .017 .0 2.1 2.2 .0 Count 21 18 18 18 23 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error NO2 Precision NO2_Diff PRECDIFF 28-Apr-2026 17:15:00 17:15:05 65.4 65.838 -.61% Ozone O3_Auto ZERO 28-Apr-2026 22:50:00 23:20:00 0 0.0 0.00 PREC 28-Apr-2026 22:50:00 23:50:00 0.067 0.07 -4.05% SO2 SO2_Auto ZERO 28-Apr-2026 19:46:00 20:11:00 0 0.0 -.06 SPAN 28-Apr-2026 19:46:00 20:36:00 84.5 90 -6.01% PREC 28-Apr-2026 19:46:00 21:01:00 37.3 40 -6.69% Date Printed: 4/29/2026 01:30 Daily Summary Report Site: Hattie Avenue (B) 4/28/2026 Interval: 001h PM2.5 PM10 STP PM Coarse Time ug/m3 ug/m3 ug/m3 00:00 5.2 10.9 5.8 01:00 5.7 11.1 5.6 02:00 6.0 12.6 6.7 03:00 6.4 14.0 7.8 04:00 6.7 12.2 5.7 05:00 7.4 13.0 5.9 06:00 9.5 14.9 5.7 07:00 10.1 14.2 4.4 08:00 10.6 13.3 2.9 09:00 10.3 14.7 4.6 10:00 9.9 12.8 3.0 11:00 9.4 13.4 4.1 12:00 7.9 12.4 4.5 13:00 7.3 12.3 4.9 14:00 6.5 9.9 3.3 15:00 6.4 9.7 3.2 16:00 6.5 11.0 4.5 17:00 6.9 11.5 4.5 18:00 6.7 10.0 3.2 19:00 6.8 11.3 4.5 20:00 6.6 10.4 3.9 21:00 6.6 11.9 5.4 22:00 7.1 11.9 4.8 23:00 7.4 12.9 5.5 Average 7.4 12.1 4.7 Max 10.6 14.9 7.8 Max Hour 08:00 06:00 03:00 Min 5.2 9.7 2.9 Count 24 24 24 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error 0.0 -6.69% Date Printed: 4/29/2026 01:30 Daily Summary Report Site: Union Cross 4/28/2026 Interval: 001h Ozone Barometric Pres. Temperature (°F) Dew Point (°F) Time ppm mmHg DegF DegF 00:00 .043 740.7 53.9 44.2 01:00 .040 740.3 52.3 44.3 02:00 .039 739.7 51.3 44.4 03:00 .040 739.6 51.1 44.7 04:00 .036 739.6 50.3 45.2 05:00 .031 741.2 50.9 46.2 06:00 .026 741.5 51.0 48.8 07:00 .021 741.7 51.4 50.5 08:00 .020 740.6 52.2 52.0 09:00 .026 738.6 53.4 53.1 10:00 .030 739.3 54.9 53.4 11:00 .031 739.2 55.7 52.9 12:00 .034 738.7 57.6 52.9 13:00 .038 738.3 59.1 53.0 14:00 .037 737.8 60.0 53.6 15:00 .038 737.2 60.7 53.9 16:00 .040 737.0 61.0 53.7 17:00 .041 736.7 60.9 53.1 18:00 .038 736.2 60.4 53.4 19:00 .034 736.4 58.7 53.5 20:00 .029 737.2 57.8 53.8 21:00 .021 737.5 57.0 54.1 22:00 .013 C 736.7 56.5 54.5 23:00 C 736.1 56.2 54.5 Average .032 738.6 55.5 50.9 Max .043 741.7 61.0 54.5 Max Hour 00:00 07:00 16:00 23:00 Min .013 736.1 50.3 44.2 Count 23 24 24 24 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error Ozone O3_Auto ZERO 28-Apr-2026 22:50:00 23:20:00 0 0.0 0.00 PREC 28-Apr-2026 22:50:00 23:50:00 0.069 0.07 -.05% 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