Date Printed: 4/25/2026 01:30 Daily Summary Report Site: Clemmons Middle 4/24/2026 Interval: 001h Ozone PM2.5 PM10 LC PM Coarse Time ppm ug/m3 ug/m3 ug/m3 00:00 .045 10.7 22.6 11.9 01:00 .042 10.7 21.8 11.1 02:00 .036 11.2 21.1 9.9 03:00 .029 11.4 20.3 8.9 04:00 .028 11.6 20.6 8.9 05:00 .017 12.3 21.5 9.1 06:00 .011 13.7 32.5 18.8 07:00 .017 14.2 47.3 33.0 08:00 .036 11.8 26.0 14.1 09:00 .053 12.9 26.4 13.4 10:00 .062 13.9 27.0 13.1 11:00 .065 12.1 26.7 14.5 12:00 .066 11.5 22.6 11.1 13:00 .066 12.3 25.8 13.5 14:00 .064 13.4 28.2 14.8 15:00 .045 13.4 29.1 15.7 16:00 .034 13.3 24.8 11.4 17:00 .035 13.8 25.4 11.6 18:00 .021 13.9 23.7 9.8 19:00 .018 14.3 23.4 9.1 20:00 .013 B 16.8 27.5 10.6 21:00 .012 24.1 40.2 16.0 22:00 .010 C 16.2 24.5 8.2 23:00 C 16.4 25.1 8.6 Average .035 13.5 26.4 12.7 Max .066 24.1 47.3 33.0 Max Hour 13:00 21:00 07:00 07:00 Min .010 10.7 20.3 8.2 Count 23 24 24 24 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error Ozone O3_Auto ZERO 24-Apr-2026 22:50:00 23:20:00 0.001 0.0 0.00 PREC 24-Apr-2026 22:50:00 23:50:00 0.071 0.07 1.43% Date Printed: 4/25/2026 01:30 Daily Summary Report Site: Hattie Avenue (A) 4/24/2026 Interval: 001h Ozone NO NO2 NOx SO2 Time ppm ppb ppb ppb ppb 00:00 .051 .1 5.7 5.8 .1 01:00 .049 .1 4.7 4.8 .1 02:00 .041 .1 5.7 5.9 .1 03:00 .035 .2 7.0 7.2 .1 04:00 .026 .3 12.8 13.1 .1 05:00 .021 .4 15.2 15.6 .1 06:00 .022 1.4 14.6 16.1 .1 07:00 .027 2.7 13.4 16.2 .1 08:00 .043 1.8 8.9 10.7 .2 09:00 .057 .7 4.9 5.6 .2 10:00 .062 .4 3.6 4.0 .2 11:00 .068 .1 2.4 2.6 .1 12:00 .066 .3 2.5 2.8 .1 13:00 .065 .1 2.2 2.3 .1 14:00 .061 .1 3.1 3.2 .1 15:00 .054 .1 C 4.9 C 5.1 C .1 16:00 .050 C C C .1 17:00 .057 .4 C 6.3 C 6.7 C .1 18:00 .054 .2 10.0 10.2 .1 19:00 .037 .2 19.3 19.5 .2 C 20:00 .019 .4 26.7 27.1 C 21:00 .012 2.4 28.5 31.0 .2 C 22:00 .015 C .5 22.6 23.1 .1 23:00 C .4 12.7 13.1 .2 Average .043 .5 10.3 10.9 .1 Max .068 2.7 28.5 31.0 .2 Max Hour 11:00 07:00 21:00 21:00 23:00 Min .012 .1 2.2 2.3 .1 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 24-Apr-2026 15:46:00 16:11:00 67.1 70 -4.01% GPT-PS 24-Apr-2026 15:46:00 16:18:00 0.6 0.0 .64 GPTZ 24-Apr-2026 15:46:00 16:38:00 216.6 225 -3.71% GPT-PREC 24-Apr-2026 15:46:00 17:08:00 152.3 155 -1.69% NO2 GPT-PREC 24-Apr-2026 15:46:00 17:08:00 65.1 70 -6.87% NO2 Precision NO2_Diff PRECDIFF 24-Apr-2026 17:15:00 17:15:05 64.2 65.194 -1.41% NOx NOx_Auto NO-PREC 24-Apr-2026 15:46:00 16:11:00 67.1 70 -4.08% Ozone O3_Auto ZERO 24-Apr-2026 22:50:00 23:20:00 0 0.0 0.00 PREC 24-Apr-2026 22:50:00 23:50:00 0.067 0.07 -2.91% SO2 SO2_Auto ZERO 24-Apr-2026 19:46:00 20:11:00 0 0.0 .03 SPAN 24-Apr-2026 19:46:00 20:36:00 85.4 90 -5.06% PREC 24-Apr-2026 19:46:00 21:01:00 37.7 40 -5.57% Date Printed: 4/25/2026 01:30 Daily Summary Report Site: Hattie Avenue (B) 4/24/2026 Interval: 001h PM2.5 PM10 STP PM Coarse Time ug/m3 ug/m3 ug/m3 00:00 10.9 28.2 16.9 01:00 11.2 24.5 13.1 02:00 11.6 25.6 13.9 03:00 11.7 25.1 13.3 04:00 12.3 23.8 11.5 05:00 12.5 25.1 12.7 06:00 12.3 26.2 13.8 07:00 12.6 43.5 30.3 08:00 11.9 31.3 18.4 09:00 13.3 32.8 18.1 10:00 B B B 11:00 B B B 12:00 11.6 28.9 15.9 13:00 11.6 23.8 11.0 14:00 13.8 41.7 26.3 15:00 13.0 25.7 11.9 16:00 14.4 30.8 15.5 17:00 14.1 31.2 15.9 18:00 16.9 42.5 24.2 19:00 19.3 33.8 13.6 20:00 20.1 39.8 18.9 21:00 19.7 39.6 19.3 22:00 20.4 36.4 15.5 23:00 20.7 33.4 12.1 Average 14.3 31.5 16.4 Max 20.7 43.5 30.3 Max Hour 23:00 07:00 07:00 Min 10.9 23.8 11.0 Count 22 22 22 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error 0.0 -5.57% Date Printed: 4/25/2026 01:30 Daily Summary Report Site: Union Cross 4/24/2026 Interval: 001h Ozone Barometric Pres. Temperature (°F) Dew Point (°F) Time ppm mmHg DegF DegF 00:00 .056 733.9 65.7 45.3 01:00 .051 733.4 62.8 44.1 02:00 .046 733.3 60.6 43.5 03:00 .041 733.5 59.8 43.5 04:00 .041 733.5 58.5 43.4 05:00 .013 733.8 54.3 43.7 06:00 .022 734.0 56.4 44.2 07:00 .025 734.2 60.7 46.8 08:00 .030 734.0 68.5 51.2 09:00 .054 733.6 75.1 53.5 10:00 .066 733.4 78.8 55.0 11:00 .068 733.0 80.9 55.8 12:00 .070 732.6 81.7 55.8 13:00 .067 732.0 82.3 55.9 14:00 .064 731.7 80.3 55.3 15:00 .061 731.7 73.9 53.4 16:00 .056 731.3 72.9 53.5 17:00 .059 731.0 76.2 55.5 18:00 .054 731.0 74.2 54.0 19:00 .050 731.0 70.0 52.4 20:00 .041 731.4 67.1 52.2 21:00 .034 731.5 67.2 53.1 22:00 .042 C 731.4 68.6 52.0 23:00 C 731.3 68.6 50.7 Average .048 732.5 69.3 50.5 Max .070 734.2 82.3 55.9 Max Hour 12:00 07:00 13:00 13:00 Min .013 731.0 54.3 43.4 Count 23 24 24 24 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error Ozone O3_Auto ZERO 24-Apr-2026 22:50:00 23:20:00 0.001 0.0 0.00 PREC 24-Apr-2026 22:50:00 23:50:00 0.07 0.07 .32% 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