Date Printed: 9/18/2026 01:30 Daily Summary Report Site: Clemmons Middle 9/17/2026 Interval: 001h Ozone PM2.5 PM10 LC PM Coarse Time ppm ug/m3 ug/m3 ug/m3 00:00 .007 12.9 74.5 61.4 01:00 .004 9.2 25.2 16.0 02:00 .002 8.5 18.7 10.1 03:00 .000 8.8 19.4 10.6 04:00 .000 8.8 23.2 14.4 05:00 .001 8.3 21.0 12.6 06:00 .000 9.0 35.2 26.2 07:00 .005 9.0 24.5 15.5 08:00 .019 9.9 19.4 9.5 09:00 .038 B 13.1 24.2 11.1 10:00 .051 13.7 24.1 10.4 11:00 .057 12.6 24.2 11.5 12:00 .059 11.6 25.8 14.2 13:00 .061 9.9 19.7 9.8 14:00 .068 9.4 19.4 9.9 15:00 .068 9.3 20.3 11.0 16:00 .064 9.0 18.1 9.1 17:00 .057 8.3 18.8 10.5 18:00 .049 9.8 35.9 26.0 19:00 .044 13.5 82.0 68.5 20:00 .038 10.8 30.3 19.4 21:00 .032 11.4 33.6 22.1 22:00 .029 C 10.9 26.1 15.2 23:00 C 11.1 24.8 13.6 Average .032 10.3 28.6 18.2 Max .068 13.7 82.0 68.5 Max Hour 15:00 10:00 19:00 19:00 Min .000 8.3 18.1 9.1 Count 23 24 24 24 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error Ozone O3_Auto ZERO 17-Sep-2026 22:50:00 23:20:00 0 0.0 0.00 PREC 17-Sep-2026 22:50:00 23:50:00 0.068 0.07 -2.82% Date Printed: 9/18/2026 01:30 Daily Summary Report Site: Hattie Avenue (A) 9/17/2026 Interval: 001h Ozone NO NO2 NOx SO2 Time ppm ppb ppb ppb ppb 00:00 .008 .8 18.1 18.9 .1 01:00 .006 1.2 16.0 17.3 .1 02:00 .008 .6 11.7 12.3 .1 03:00 .004 .9 14.1 15.0 .1 04:00 .003 2.1 13.8 16.0 .1 05:00 .006 1.4 14.0 15.4 .1 06:00 .004 5.6 13.6 19.3 .2 07:00 .008 15.9 16.9 32.9 .4 08:00 .023 10.4 15.1 25.5 .4 09:00 .050 1.5 B 8.4 B 10.0 B .5 10:00 .065 .5 B 5.1 B 5.7 B .6 11:00 .070 .2 3.5 3.8 .5 12:00 .067 .1 2.8 3.0 .4 13:00 .067 .1 2.5 2.6 .3 14:00 .066 .1 2.3 2.5 .3 15:00 .071 .1 C 2.4 C 2.5 C .3 16:00 .077 C C C .4 17:00 .067 .1 C 3.6 C 3.7 C .3 18:00 .065 .0 5.0 5.1 .2 19:00 .057 .0 9.7 9.8 .2 C 20:00 .056 .0 9.3 9.4 C 21:00 .054 .1 8.5 8.7 .5 C 22:00 .049 C .1 10.6 10.7 .5 23:00 C .1 8.4 8.5 1.3 Average .041 1.8 9.3 11.2 .3 Max .077 15.9 18.1 32.9 1.3 Max Hour 16:00 07:00 00:00 07:00 23:00 Min .003 .0 2.3 2.5 .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 17-Sep-2026 15:46:00 16:11:00 70 70 .05% GPT-PS 17-Sep-2026 15:46:00 16:18:00 0.5 0.0 .56 GPTZ 17-Sep-2026 15:46:00 16:38:00 225.6 225 .28% GPT-PREC 17-Sep-2026 15:46:00 17:08:00 157.4 155 1.58% NO2 GPT-PREC 17-Sep-2026 15:46:00 17:08:00 68.9 70 -1.51% NO2 Precision NO2_Diff PRECDIFF 17-Sep-2026 17:15:00 17:15:05 68.1 68.94 -1.11% NOx NOx_Auto NO-PREC 17-Sep-2026 15:46:00 16:11:00 69.9 70 -.12% Ozone O3_Auto ZERO 17-Sep-2026 22:50:00 23:20:00 0 0.0 0.00 PREC 17-Sep-2026 22:50:00 23:50:00 0.067 0.07 -2.71% SO2 SO2_Auto ZERO 17-Sep-2026 19:46:00 20:11:00 0 0.0 .03 SPAN 17-Sep-2026 19:46:00 20:36:00 88.2 90 -1.89% PREC 17-Sep-2026 19:46:00 21:01:00 38.8 40 -2.78% Date Printed: 9/18/2026 01:30 Daily Summary Report Site: Hattie Avenue (B) 9/17/2026 Interval: 001h PM2.5 PM10 STP PM Coarse Time ug/m3 ug/m3 ug/m3 00:00 15.7 30.7 14.8 01:00 14.4 26.1 11.6 02:00 11.8 21.3 9.5 03:00 10.1 18.9 8.8 04:00 10.5 19.6 9.1 05:00 10.4 20.1 9.6 06:00 10.5 25.0 14.5 07:00 13.2 41.7 28.0 08:00 14.3 39.8 24.6 09:00 14.7 28.8 13.2 10:00 13.8 29.7 14.8 11:00 12.2 24.4 11.1 12:00 11.9 26.0 12.8 13:00 10.7 25.0 13.0 14:00 10.4 25.3 13.6 15:00 10.0 22.3 11.1 16:00 9.7 20.8 10.0 17:00 9.3 22.7 12.3 18:00 9.9 23.1 12.3 19:00 11.1 25.2 13.2 20:00 11.7 27.6 15.0 21:00 10.3 21.7 10.7 22:00 10.9 22.5 10.9 23:00 11.3 28.3 16.1 Average 11.6 25.6 13.3 Max 15.7 41.7 28.0 Max Hour 00:00 07:00 07:00 Min 9.3 18.9 8.8 Count 24 24 24 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error 0.0 -2.78% Date Printed: 9/18/2026 01:30 Daily Summary Report Site: Union Cross 9/17/2026 Interval: 001h Ozone Barometric Pres. Temperature (°F) Dew Point (°F) Time ppm mmHg DegF DegF 00:00 .021 744.0 66.7 61.9 01:00 .022 743.7 66.2 61.4 02:00 .016 743.4 66.3 61.5 03:00 .017 743.3 64.8 61.3 04:00 .009 742.9 63.8 61.6 05:00 .006 743.1 64.0 62.4 06:00 .005 743.4 64.5 62.8 07:00 .013 743.5 69.1 64.1 08:00 .034 743.6 74.6 64.9 09:00 .049 743.6 78.8 65.2 10:00 .060 743.4 82.0 66.7 11:00 .064 743.1 84.8 67.2 12:00 .073 742.6 87.4 67.7 13:00 .078 742.0 88.9 68.3 14:00 .082 741.2 89.8 68.9 15:00 .083 740.7 90.5 69.2 16:00 .083 740.6 89.5 69.0 17:00 .072 740.7 87.6 68.3 18:00 .066 740.8 84.4 67.2 19:00 .058 740.7 82.1 66.3 20:00 .050 740.9 79.8 65.7 21:00 .049 741.0 78.9 65.6 22:00 .055 C 740.7 78.8 65.4 23:00 C 740.5 77.6 65.3 Average .046 742.2 77.5 65.3 Max .083 744.0 90.5 69.2 Max Hour 16:00 00:00 15:00 15:00 Min .005 740.5 63.8 61.3 Count 23 24 24 24 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error Ozone O3_Auto ZERO 17-Sep-2026 22:50:00 23:20:00 0.001 0.0 0.00 PREC 17-Sep-2026 22:50:00 23:50:00 0.071 0.07 1.68% 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