Date Printed: 4/26/2026 01:30 Daily Summary Report Site: Clemmons Middle 4/25/2026 Interval: 001h Ozone PM2.5 PM10 LC PM Coarse Time ppm ug/m3 ug/m3 ug/m3 00:00 .019 17.0 24.9 7.9 01:00 .020 18.1 24.8 6.6 02:00 .014 18.1 24.3 6.1 03:00 .012 18.3 24.5 6.2 04:00 .014 19.3 26.5 7.2 05:00 .016 19.4 25.4 6.0 06:00 .010 18.1 24.3 6.1 07:00 .015 18.8 25.6 6.7 08:00 .031 20.6 29.6 8.9 09:00 .042 19.2 30.4 11.1 10:00 .053 15.8 25.8 9.9 11:00 .055 12.6 30.4 17.8 12:00 .056 B 11.9 20.6 8.7 13:00 .058 12.5 21.5 8.9 14:00 .055 11.5 21.0 9.5 15:00 .050 11.4 21.4 10.0 16:00 .042 6.8 17.3 10.5 17:00 .037 6.2 12.9 6.7 18:00 .033 5.7 10.8 5.1 19:00 .028 5.3 11.2 5.9 20:00 .019 5.6 10.5 4.9 21:00 .014 6.1 11.9 5.8 22:00 .013 C 7.0 12.5 5.5 23:00 B 6.8 13.6 6.7 Average .030 13.0 20.9 7.8 Max .058 20.6 30.4 17.8 Max Hour 13:00 08:00 11:00 11:00 Min .010 5.3 10.5 4.9 Count 23 24 24 24 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error Ozone O3_Auto ZERO 25-Apr-2026 22:50:00 23:20:00 0.001 0.0 0.00 PREC 25-Apr-2026 22:50:00 23:50:00 0.071 0.07 2.33% Date Printed: 4/26/2026 01:30 Daily Summary Report Site: Hattie Avenue (A) 4/25/2026 Interval: 001h Ozone NO NO2 NOx SO2 Time ppm ppb ppb ppb ppb 00:00 .042 .2 6.8 7.0 .2 01:00 .039 .2 6.1 6.3 .1 02:00 .032 .2 7.9 8.2 .1 03:00 .025 .3 9.0 9.4 .1 04:00 .022 .5 9.1 9.6 .0 05:00 .019 .5 11.1 11.6 .1 06:00 .019 2.2 12.9 15.0 .1 07:00 .030 1.2 8.2 9.5 .2 08:00 .043 .5 4.1 4.7 .1 09:00 .049 .3 2.8 3.2 .1 10:00 .055 .3 2.9 3.3 .1 11:00 .057 .2 2.2 2.4 .1 12:00 .055 .1 1.7 1.9 .1 13:00 .056 .1 1.8 2.0 .1 14:00 .047 .4 4.2 4.7 .2 15:00 .044 .5 C 4.4 C 5.0 C .2 16:00 .039 C C C .1 17:00 .033 .4 C 3.1 C 3.5 C .0 18:00 .028 .5 3.6 4.1 .0 19:00 .026 .4 4.3 4.8 .0 C 20:00 .018 .8 6.8 7.7 C 21:00 .017 .6 6.7 7.4 .1 C 22:00 .014 C .6 8.0 8.7 .0 23:00 C 1.0 8.7 9.8 .1 Average .035 .5 5.9 6.5 .0 Max .057 2.2 12.9 15.0 .2 Max Hour 11:00 06:00 06:00 06:00 15:00 Min .014 .1 1.7 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 25-Apr-2026 15:46:00 16:11:00 67.1 70 -4.12% GPT-PS 25-Apr-2026 15:46:00 16:18:00 0.5 0.0 .52 GPTZ 25-Apr-2026 15:46:00 16:38:00 216.9 225 -3.6% GPT-PREC 25-Apr-2026 15:46:00 17:08:00 150.9 155 -2.61% NO2 GPT-PREC 25-Apr-2026 15:46:00 17:08:00 66.5 70 -4.98% NO2 Precision NO2_Diff PRECDIFF 25-Apr-2026 17:15:00 17:15:05 65.9 66.516 -.86% NOx NOx_Auto NO-PREC 25-Apr-2026 15:46:00 16:11:00 67.2 70 -3.94% Ozone O3_Auto ZERO 25-Apr-2026 22:50:00 23:20:00 0 0.0 0.00 PREC 25-Apr-2026 22:50:00 23:50:00 0.067 0.07 -4.21% SO2 SO2_Auto ZERO 25-Apr-2026 19:46:00 20:11:00 0 0.0 .08 SPAN 25-Apr-2026 19:46:00 20:36:00 85.4 90 -5.07% PREC 25-Apr-2026 19:46:00 21:01:00 37.8 40 -5.48% Date Printed: 4/26/2026 01:30 Daily Summary Report Site: Hattie Avenue (B) 4/25/2026 Interval: 001h PM2.5 PM10 STP PM Coarse Time ug/m3 ug/m3 ug/m3 00:00 19.9 31.3 10.8 01:00 20.4 32.2 11.4 02:00 20.6 32.7 11.8 03:00 21.0 31.6 10.4 04:00 21.2 30.6 9.3 05:00 22.6 30.7 8.1 06:00 24.3 32.8 8.3 07:00 21.7 33.1 10.7 08:00 18.3 28.2 8.9 09:00 15.7 29.2 12.2 10:00 14.6 27.3 11.4 11:00 13.0 24.3 10.0 12:00 12.5 24.8 11.0 13:00 12.7 24.4 10.3 14:00 13.4 31.9 17.4 15:00 10.9 21.8 10.1 16:00 8.5 24.8 15.8 17:00 6.1 14.6 8.3 18:00 5.2 10.5 5.2 19:00 4.9 9.1 4.1 20:00 6.4 13.0 6.5 21:00 6.2 12.5 6.2 22:00 6.9 12.8 5.7 23:00 7.9 16.8 8.7 Average 13.9 24.2 9.6 Max 24.3 33.1 17.4 Max Hour 06:00 07:00 14:00 Min 4.9 9.1 4.1 Count 24 24 24 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error 0.0 -5.48% Date Printed: 4/26/2026 01:30 Daily Summary Report Site: Union Cross 4/25/2026 Interval: 001h Ozone Barometric Pres. Temperature (°F) Dew Point (°F) Time ppm mmHg DegF DegF 00:00 .045 731.2 66.0 50.2 01:00 .039 731.0 63.1 49.7 02:00 .036 731.0 62.1 49.7 03:00 .033 731.0 61.1 49.5 04:00 .033 730.9 59.9 48.9 05:00 .030 731.3 58.3 49.0 06:00 .018 731.4 59.9 50.2 07:00 .028 731.7 62.7 51.7 08:00 .038 731.8 68.2 54.3 09:00 .047 731.8 72.2 55.9 10:00 .054 731.8 76.6 57.4 11:00 .056 731.3 79.1 58.1 12:00 .056 730.8 80.6 58.0 13:00 .057 730.4 81.6 58.6 14:00 .055 730.2 77.9 57.6 15:00 .046 730.0 75.8 58.4 16:00 .044 731.3 68.2 58.6 17:00 .041 731.7 61.6 58.6 18:00 .039 731.6 61.7 58.1 19:00 .028 732.0 61.1 58.7 20:00 .017 732.2 60.7 59.5 21:00 .017 732.3 60.7 59.9 22:00 .013 C 732.0 60.5 60.0 23:00 C 731.7 60.2 59.9 Average .037 731.3 66.6 55.4 Max .057 732.3 81.6 60.0 Max Hour 13:00 21:00 13:00 22:00 Min .013 730.0 58.3 48.9 Count 23 24 24 24 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error Ozone O3_Auto ZERO 25-Apr-2026 22:50:00 23:20:00 0 0.0 0.00 PREC 25-Apr-2026 22:50:00 23:50:00 0.07 0.07 1.28% 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