Date Printed: 4/24/2026 01:30 Daily Summary Report Site: Clemmons Middle 4/23/2026 Interval: 001h Ozone PM2.5 PM10 LC PM Coarse Time ppm ug/m3 ug/m3 ug/m3 00:00 .030 8.7 15.9 7.2 01:00 .025 9.1 15.7 6.5 02:00 .019 10.1 18.3 8.1 03:00 .017 10.2 16.9 6.7 04:00 .014 10.1 18.0 7.8 05:00 .007 10.2 17.3 7.1 06:00 .007 11.9 39.0 27.1 07:00 .013 D 11.8 33.2 21.3 08:00 D 11.1 23.5 12.3 09:00 B 9.1 20.6 11.5 10:00 .061 8.1 22.0 13.9 11:00 .062 8.4 27.7 19.2 12:00 .065 7.9 21.1 13.1 13:00 .067 7.7 21.1 13.4 14:00 .067 7.7 19.4 11.6 15:00 .068 8.1 21.5 13.4 16:00 .071 8.4 22.4 13.9 17:00 .072 9.0 25.0 15.9 18:00 .068 9.7 24.8 15.0 19:00 .065 9.9 24.4 14.5 20:00 .059 14.8 65.9 51.0 21:00 .054 15.9 61.8 45.8 22:00 .043 C 15.1 57.9 42.7 23:00 C 12.2 35.6 23.4 Average .045 10.2 27.8 17.6 Max .072 15.9 65.9 51.0 Max Hour 17:00 21:00 20:00 20:00 Min .007 7.7 15.7 6.5 Count 21 24 24 24 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error Ozone O3_Auto ZERO 23-Apr-2026 22:50:00 23:20:00 0.001 0.0 0.00 PREC 23-Apr-2026 22:50:00 23:50:00 0.072 0.07 2.75% Date Printed: 4/24/2026 01:30 Daily Summary Report Site: Hattie Avenue (A) 4/23/2026 Interval: 001h Ozone NO NO2 NOx SO2 Time ppm ppb ppb ppb ppb 00:00 .028 .2 7.2 7.4 .1 01:00 .024 .3 8.6 8.9 .0 02:00 .015 .4 18.8 19.2 .0 03:00 .013 .5 17.8 18.4 .0 04:00 .016 .5 14.6 15.2 .0 05:00 .008 2.1 18.2 20.4 .0 06:00 .004 13.0 20.1 33.2 .2 07:00 .024 5.0 14.4 19.5 .2 08:00 .041 3.1 11.4 14.6 .2 09:00 .057 .5 3.4 3.9 .1 10:00 .062 .2 2.0 2.2 .1 11:00 .061 .2 2.0 2.2 .1 12:00 .063 .1 1.8 1.9 .1 13:00 .065 .1 2.1 2.2 .1 14:00 .066 .1 2.1 2.3 .1 15:00 .066 .1 C 2.1 C 2.2 C .1 16:00 .066 C C C .1 17:00 .068 .1 C 3.2 C 3.3 C .1 18:00 .066 .0 4.9 5.0 .1 19:00 .060 .0 7.2 7.3 .1 C 20:00 .055 .1 8.7 8.8 C 21:00 .055 .1 8.1 8.3 .1 C 22:00 .061 C .0 5.1 5.2 .2 23:00 C .0 4.6 4.7 .2 Average .045 1.1 8.1 9.4 .1 Max .068 13.0 20.1 33.2 .2 Max Hour 17:00 06:00 06:00 06:00 23:00 Min .004 .0 1.8 1.9 .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 23-Apr-2026 15:46:00 16:11:00 66.9 70 -4.3% GPT-PS 23-Apr-2026 15:46:00 16:18:00 0.4 0.0 .46 GPTZ 23-Apr-2026 15:46:00 16:38:00 216.7 225 -3.66% GPT-PREC 23-Apr-2026 15:46:00 17:08:00 151.4 155 -2.29% NO2 GPT-PREC 23-Apr-2026 15:46:00 17:08:00 66 70 -5.7% NO2 Precision NO2_Diff PRECDIFF 23-Apr-2026 17:15:00 17:15:05 65.3 66.013 -1.07% NOx NOx_Auto NO-PREC 23-Apr-2026 15:46:00 16:11:00 67 70 -4.23% Ozone O3_Auto ZERO 23-Apr-2026 22:50:00 23:20:00 0 0.0 0.00 PREC 23-Apr-2026 22:50:00 23:50:00 0.067 0.07 -3.44% SO2 SO2_Auto ZERO 23-Apr-2026 19:46:00 20:11:00 0 0.0 .02 SPAN 23-Apr-2026 19:46:00 20:36:00 85.6 90 -4.87% PREC 23-Apr-2026 19:46:00 21:01:00 37.7 40 -5.53% Date Printed: 4/24/2026 01:30 Daily Summary Report Site: Hattie Avenue (B) 4/23/2026 Interval: 001h PM2.5 PM10 STP PM Coarse Time ug/m3 ug/m3 ug/m3 00:00 9.2 19.7 10.5 01:00 9.8 19.3 9.6 02:00 11.4 35.1 23.9 03:00 12.0 30.5 18.7 04:00 11.2 22.0 11.0 05:00 11.1 20.5 9.6 06:00 11.7 21.5 10.0 07:00 10.8 27.2 16.1 08:00 12.5 46.6 33.0 09:00 8.9 26.7 16.9 10:00 8.0 23.3 14.5 11:00 8.1 22.3 13.2 12:00 7.8 21.5 12.7 13:00 7.9 24.1 15.0 14:00 7.7 23.7 14.8 15:00 8.1 21.1 11.9 16:00 8.6 23.9 14.2 17:00 8.8 24.6 14.8 18:00 9.6 27.2 16.6 19:00 10.6 24.6 13.3 20:00 11.6 27.3 15.0 21:00 11.8 25.9 13.5 22:00 10.7 25.1 13.8 23:00 10.9 25.6 14.1 Average 9.9 25.3 14.8 Max 12.5 46.6 33.0 Max Hour 08:00 08:00 08:00 Min 7.7 19.3 9.6 Count 24 24 24 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error 0.0 -5.53% Date Printed: 4/24/2026 01:30 Daily Summary Report Site: Union Cross 4/23/2026 Interval: 001h Ozone Barometric Pres. Temperature (°F) Dew Point (°F) Time ppm mmHg DegF DegF 00:00 .027 737.2 61.5 48.6 01:00 .023 736.8 58.4 48.1 02:00 .016 736.7 55.9 48.2 03:00 .013 736.9 55.4 47.9 04:00 .014 736.9 55.7 47.5 05:00 .015 737.2 55.0 47.1 06:00 .012 737.6 54.7 47.9 07:00 .018 737.9 60.9 49.6 08:00 .027 737.9 68.9 51.5 09:00 .047 737.9 73.7 52.5 10:00 .062 737.7 76.3 52.5 11:00 .064 737.2 77.7 53.1 12:00 .065 736.6 79.1 53.6 13:00 .066 735.9 80.9 54.5 14:00 .067 735.1 81.5 54.7 15:00 .068 734.4 82.2 55.0 16:00 .069 734.1 82.0 54.4 17:00 .072 734.0 80.7 53.7 18:00 .069 734.0 77.8 52.1 19:00 .063 734.1 74.1 49.8 20:00 .059 734.2 71.4 47.8 21:00 .055 734.4 69.8 46.4 22:00 .057 C 734.2 68.5 45.4 23:00 C 734.0 67.8 45.8 Average .045 735.9 69.5 50.3 Max .072 737.9 82.2 55.0 Max Hour 17:00 09:00 15:00 15:00 Min .012 734.0 54.7 45.4 Count 23 24 24 24 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error Ozone O3_Auto ZERO 23-Apr-2026 22:50:00 23:20:00 0 0.0 0.00 PREC 23-Apr-2026 22:50:00 23:50:00 0.07 0.07 .52% 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