Date Printed: 5/18/2026 01:30 Daily Summary Report Site: Clemmons Middle 5/17/2026 Interval: 001h Ozone PM2.5 PM10 LC PM Coarse Time ppm ug/m3 ug/m3 ug/m3 00:00 .041 8.6 15.0 6.4 01:00 .039 9.2 16.3 7.1 02:00 .033 10.0 16.2 6.2 03:00 .028 10.1 15.9 5.7 04:00 .023 10.7 16.7 5.9 05:00 .021 11.2 16.9 5.7 06:00 .019 11.4 16.4 4.9 07:00 .033 11.8 19.0 7.2 08:00 .043 13.1 22.2 9.1 09:00 .051 13.3 21.7 8.4 10:00 .060 13.4 22.4 8.9 11:00 .064 B 12.5 20.5 8.0 12:00 .069 13.2 22.7 9.5 13:00 .062 12.2 21.3 9.0 14:00 .060 12.5 30.8 18.2 15:00 .062 12.0 21.4 9.3 16:00 .070 11.7 21.1 9.4 17:00 .071 11.3 23.1 11.7 18:00 .063 11.6 20.6 8.9 19:00 .061 12.0 21.1 9.1 20:00 .055 12.4 20.0 7.6 21:00 .053 13.4 20.5 7.1 22:00 .052 C 13.5 20.0 6.4 23:00 B 14.1 21.2 7.0 Average .049 11.8 20.1 8.1 Max .071 14.1 30.8 18.2 Max Hour 17:00 23:00 14:00 14:00 Min .019 8.6 15.0 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 17-May-2026 22:50:00 23:20:00 0.002 0.0 0.00 PREC 17-May-2026 22:50:00 23:50:00 0.071 0.07 2.7% Date Printed: 5/18/2026 01:30 Daily Summary Report Site: Hattie Avenue (A) 5/17/2026 Interval: 001h Ozone NO NO2 NOx SO2 Time ppm ppb ppb ppb ppb 00:00 .047 .1 3.9 4.0 -.2 01:00 .044 .1 4.2 4.3 -.1 02:00 .040 .1 4.7 4.9 -.1 03:00 .031 .2 6.0 6.2 -.2 04:00 .028 .3 7.4 7.7 -.1 05:00 .030 .3 5.8 6.2 -.1 06:00 .033 .4 4.5 5.0 .0 07:00 .037 .8 5.6 6.5 .4 08:00 .042 .8 5.1 6.0 .4 09:00 .052 .6 4.4 5.0 .3 10:00 .061 .3 3.3 3.6 .0 11:00 .064 .2 2.7 3.0 .0 12:00 .065 .2 3.1 3.4 .0 13:00 .065 .2 3.6 3.8 .0 14:00 .059 .3 3.8 4.1 -.1 15:00 .061 .2 C 3.5 C 3.7 C .0 16:00 .066 C C C .0 17:00 .069 .2 C 3.7 C 3.9 C .0 18:00 .062 .0 3.7 3.8 .0 19:00 .053 .0 6.0 6.1 .0 C 20:00 .047 .0 7.3 7.3 C 21:00 .051 .1 4.5 4.6 -.1 C 22:00 .047 C .1 5.7 5.9 -.2 23:00 C .3 7.8 8.1 -.2 Average .050 .2 4.7 5.0 .0 Max .069 .8 7.8 8.1 .4 Max Hour 17:00 08:00 23:00 23:00 08:00 Min .028 .0 2.7 3.0 -.2 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-May-2026 15:46:00 16:11:00 68.6 70 -1.95% GPT-PS 17-May-2026 15:46:00 16:18:00 0.4 0.0 .49 GPTZ 17-May-2026 15:46:00 16:38:00 221.6 225 -1.51% GPT-PREC 17-May-2026 15:46:00 17:08:00 155.1 155 .11% NO2 GPT-PREC 17-May-2026 15:46:00 17:08:00 66.8 70 -4.44% NO2 Precision NO2_Diff PRECDIFF 17-May-2026 17:15:00 17:15:05 66.4 66.889 -.68% NOx NOx_Auto NO-PREC 17-May-2026 15:46:00 16:11:00 68.9 70 -1.44% Ozone O3_Auto ZERO 17-May-2026 22:50:00 23:20:00 0 0.0 0.00 PREC 17-May-2026 22:50:00 23:50:00 0.067 0.07 -3.59% SO2 SO2_Auto ZERO 17-May-2026 19:46:00 20:11:00 -0.4 0.0 -.42 SPAN 17-May-2026 19:46:00 20:36:00 89.3 90 -.76% PREC 17-May-2026 19:46:00 21:01:00 39.2 40 -1.91% Date Printed: 5/18/2026 01:30 Daily Summary Report Site: Hattie Avenue (B) 5/17/2026 Interval: 001h PM2.5 PM10 STP PM Coarse Time ug/m3 ug/m3 ug/m3 00:00 9.4 17.4 7.7 01:00 9.9 18.2 8.0 02:00 10.6 20.0 9.2 03:00 12.8 19.8 6.9 04:00 13.0 21.2 8.0 05:00 14.2 21.8 7.6 06:00 13.0 22.0 8.8 07:00 12.9 20.9 7.6 08:00 13.8 22.8 8.4 09:00 15.6 24.7 8.3 10:00 15.4 26.5 10.0 11:00 15.0 25.6 9.4 12:00 14.1 24.8 9.5 13:00 13.5 24.2 9.5 14:00 12.9 24.2 10.1 15:00 13.4 23.1 8.5 16:00 12.7 23.6 9.6 17:00 12.4 24.5 10.9 18:00 12.5 21.3 7.8 19:00 12.6 23.2 9.7 20:00 13.3 23.1 9.1 21:00 12.8 21.3 8.0 22:00 13.6 22.7 8.6 23:00 14.5 23.9 9.0 Average 13.0 22.5 8.7 Max 15.6 26.5 10.9 Max Hour 09:00 10:00 17:00 Min 9.4 17.4 6.9 Count 24 24 24 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error 0.0 -1.91% Date Printed: 5/18/2026 01:30 Daily Summary Report Site: Union Cross 5/17/2026 Interval: 001h Ozone Barometric Pres. Temperature (°F) Dew Point (°F) Time ppm mmHg DegF DegF 00:00 .044 738.5 68.9 53.4 01:00 .041 738.4 67.7 53.2 02:00 .036 738.4 65.5 53.1 03:00 .032 738.5 64.4 53.7 04:00 .032 738.8 62.9 54.2 05:00 .029 739.2 61.9 55.1 06:00 .032 739.8 63.8 57.3 07:00 .036 740.4 68.0 60.2 08:00 .043 740.7 71.8 61.8 09:00 .049 740.7 75.4 62.9 10:00 .056 740.7 79.2 63.7 11:00 .061 740.6 82.1 63.9 12:00 .060 740.2 84.5 64.5 13:00 .058 739.8 86.1 65.1 14:00 .061 739.4 87.3 66.2 15:00 .063 739.1 87.0 65.7 16:00 .065 739.0 87.0 65.6 17:00 .062 738.9 86.6 65.3 18:00 .059 739.0 84.8 65.2 19:00 .053 739.3 81.4 63.8 20:00 .049 739.8 78.6 62.6 21:00 .043 740.4 76.5 61.3 22:00 .042 C 740.5 75.7 60.2 23:00 C 740.5 73.1 60.2 Average .048 739.6 75.8 60.7 Max .065 740.7 87.3 66.2 Max Hour 16:00 10:00 14:00 14:00 Min .029 738.4 61.9 53.1 Count 23 24 24 24 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error Ozone O3_Auto ZERO 17-May-2026 22:50:00 23:20:00 0 0.0 0.00 PREC 17-May-2026 22:50:00 23:50:00 0.069 0.07 -.4% 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