Date Printed: 6/21/2026 01:30 Daily Summary Report Site: Clemmons Middle 6/20/2026 Interval: 001h Ozone PM2.5 PM10 LC PM Coarse Time ppm ug/m3 ug/m3 ug/m3 00:00 .025 3.7 14.7 10.9 01:00 .022 B 4.0 13.9 9.8 02:00 .017 4.2 12.9 8.6 03:00 .012 4.4 15.4 10.9 04:00 .009 4.7 16.9 12.2 05:00 .006 5.0 13.0 8.0 06:00 .012 4.6 11.1 6.5 07:00 .021 4.1 9.3 5.2 08:00 .035 3.6 8.5 4.9 09:00 .045 B 3.4 7.8 4.3 10:00 .048 3.9 8.9 5.0 11:00 .051 3.9 8.7 4.7 12:00 .051 3.9 9.1 5.2 13:00 .052 3.5 8.7 5.1 14:00 .050 3.5 7.6 4.0 15:00 .049 3.6 8.3 4.6 16:00 .050 3.4 7.9 4.5 17:00 .050 3.6 7.6 4.0 18:00 .048 B 3.8 8.4 4.6 19:00 .048 4.0 9.3 5.2 20:00 .052 5.0 10.7 5.6 21:00 .042 5.4 11.0 5.6 22:00 .033 C 5.4 10.2 4.8 23:00 C 6.0 11.2 5.2 Average .036 4.1 10.4 6.2 Max .052 6.0 16.9 12.2 Max Hour 20:00 23:00 04:00 04:00 Min .006 3.4 7.6 4.0 Count 23 24 24 24 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error Ozone O3_Auto ZERO 20-Jun-2026 22:50:00 23:20:00 -0.002 0.0 0.00 PREC 20-Jun-2026 22:50:00 23:50:00 0.067 0.07 -3.39% Date Printed: 6/21/2026 01:30 Daily Summary Report Site: Hattie Avenue (A) 6/20/2026 Interval: 001h Ozone NO NO2 NOx SO2 Time ppm ppb ppb ppb ppb 00:00 .033 .2 8.2 8.5 -.5 01:00 .025 .3 14.4 14.7 -.5 02:00 .027 .3 13.2 13.6 -.5 03:00 .013 1.0 15.3 16.4 -.5 04:00 .005 3.2 18.5 21.7 -.5 05:00 .005 6.8 16.5 23.3 -.4 06:00 .015 3.8 8.7 12.5 -.5 07:00 .034 1.1 4.1 5.2 -.5 08:00 .042 .6 2.2 2.8 -.5 09:00 .049 .5 1.6 2.1 -.4 10:00 .049 .4 1.8 2.2 -.4 11:00 .050 .5 1.8 2.3 -.4 12:00 .050 .5 1.9 2.4 -.5 13:00 .050 .5 2.1 2.7 -.4 14:00 .051 .5 2.3 2.9 -.5 15:00 .051 .4 C 2.1 C 2.6 C -.5 16:00 .050 C C C -.4 17:00 .047 .9 C 4.4 C 5.4 C -.4 18:00 .045 .7 5.1 5.9 -.5 19:00 .043 .3 5.8 6.1 -.5 C 20:00 .046 .2 6.2 6.4 C 21:00 .045 .2 6.6 6.9 -.1 C 22:00 .039 C .3 8.8 9.2 .0 23:00 C .2 6.8 7.1 -.2 Average .037 1.0 6.8 7.9 -.4 Max .051 6.8 18.5 23.3 .0 Max Hour 15:00 05:00 04:00 05:00 22:00 Min .005 .2 1.6 2.1 -.5 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 20-Jun-2026 15:46:00 16:11:00 66.5 70 -5% GPT-PS 20-Jun-2026 15:46:00 16:18:00 0.4 0.0 .44 GPTZ 20-Jun-2026 15:46:00 16:38:00 214.8 225 -4.53% GPT-PREC 20-Jun-2026 15:46:00 17:08:00 150.1 155 -3.11% NO2 GPT-PREC 20-Jun-2026 15:46:00 17:08:00 65.4 70 -6.45% NO2 Precision NO2_Diff PRECDIFF 20-Jun-2026 17:15:00 17:15:05 64.6 65.487 -1.31% NOx NOx_Auto NO-PREC 20-Jun-2026 15:46:00 16:11:00 66.4 70 -5.05% Ozone O3_Auto ZERO 20-Jun-2026 22:50:00 23:20:00 0 0.0 0.00 PREC 20-Jun-2026 22:50:00 23:50:00 0.067 0.07 -3.2% SO2 SO2_Auto ZERO 20-Jun-2026 19:46:00 20:11:00 -0.6 0.0 -.66 SPAN 20-Jun-2026 19:46:00 20:36:00 87.2 90 -3.05% PREC 20-Jun-2026 19:46:00 21:01:00 38.2 40 -4.38% Date Printed: 6/21/2026 01:30 Daily Summary Report Site: Hattie Avenue (B) 6/20/2026 Interval: 001h PM2.5 PM10 STP PM Coarse Time ug/m3 ug/m3 ug/m3 00:00 3.8 8.8 4.9 01:00 4.5 8.9 4.3 02:00 4.3 8.7 4.3 03:00 5.0 9.9 4.8 04:00 6.2 12.3 6.0 05:00 6.1 13.1 6.9 06:00 4.7 10.6 5.7 07:00 3.7 9.7 5.6 08:00 3.3 9.5 5.8 09:00 3.6 9.4 5.3 10:00 3.8 9.1 4.8 11:00 3.8 8.7 4.5 12:00 3.7 10.0 5.8 13:00 3.6 7.6 3.6 14:00 4.0 10.4 5.9 15:00 4.0 9.9 5.4 16:00 4.3 11.1 6.2 17:00 4.4 9.7 4.8 18:00 4.6 10.2 5.1 19:00 4.4 10.4 5.5 20:00 6.0 12.1 5.6 21:00 5.9 11.8 5.5 22:00 7.2 13.2 5.6 23:00 8.4 14.6 5.8 Average 4.7 10.4 5.3 Max 8.4 14.6 6.9 Max Hour 23:00 23:00 05:00 Min 3.3 7.6 3.6 Count 24 24 24 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error 0.0 -4.38% Date Printed: 6/21/2026 01:30 Daily Summary Report Site: Union Cross 6/20/2026 Interval: 001h Ozone Barometric Pres. Temperature (°F) Dew Point (°F) Time ppm mmHg DegF DegF 00:00 .036 735.7 68.7 52.8 01:00 .031 735.9 66.7 52.5 02:00 .020 735.8 64.4 52.4 03:00 .024 735.8 61.9 51.8 04:00 .020 735.9 60.2 52.3 05:00 .014 736.3 60.7 53.4 06:00 .013 736.3 66.7 56.2 07:00 .025 736.6 71.6 57.3 08:00 .039 736.7 74.6 57.7 09:00 .049 736.6 77.0 57.7 10:00 .052 736.6 78.5 58.1 11:00 .053 736.3 80.1 58.6 12:00 .053 735.9 81.1 58.2 13:00 .055 735.5 82.4 58.9 14:00 .056 735.1 83.5 60.2 15:00 .055 734.6 84.5 60.3 16:00 .054 734.1 85.2 61.3 17:00 .054 734.1 85.3 61.4 18:00 .053 734.2 84.4 61.3 19:00 .049 734.4 81.2 59.2 20:00 .045 734.7 77.6 57.7 21:00 .048 735.2 75.6 57.8 22:00 .046 C 735.1 73.7 58.4 23:00 C 734.8 72.0 58.9 Average .041 735.5 74.9 57.2 Max .056 736.7 85.3 61.4 Max Hour 14:00 08:00 17:00 17:00 Min .013 734.1 60.2 51.8 Count 23 24 24 24 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error Ozone O3_Auto ZERO 20-Jun-2026 22:50:00 23:20:00 0 0.0 0.00 PREC 20-Jun-2026 22:50:00 23:50:00 0.07 0.07 -.19% 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