Date Printed: 6/18/2026 01:30 Daily Summary Report Site: Clemmons Middle 6/17/2026 Interval: 001h Ozone PM2.5 PM10 LC PM Coarse Time ppm ug/m3 ug/m3 ug/m3 00:00 .028 8.3 16.3 7.9 01:00 .023 9.1 14.8 5.7 02:00 .019 9.9 15.0 5.1 03:00 .013 10.2 15.2 4.9 04:00 .009 10.8 15.3 4.4 05:00 .004 B 11.2 16.5 5.3 06:00 .008 14.4 71.1 56.7 07:00 .024 11.3 19.0 7.6 08:00 .039 10.9 20.3 9.3 09:00 .049 8.5 19.7 11.1 10:00 .054 7.1 13.9 6.8 11:00 .056 6.5 14.3 7.7 12:00 .056 6.6 16.5 9.8 13:00 .055 5.9 12.5 6.6 14:00 .059 5.8 12.8 6.9 15:00 .060 6.3 14.4 8.1 16:00 .067 6.9 15.9 8.9 17:00 .067 7.9 18.6 10.6 18:00 .064 8.9 24.4 15.5 19:00 .057 8.0 18.0 9.9 20:00 .052 7.8 15.2 7.4 21:00 .050 7.7 15.2 7.5 22:00 .045 B 7.3 15.7 8.3 23:00 C 7.5 14.1 6.5 Average .041 8.5 18.5 9.9 Max .067 14.4 71.1 56.7 Max Hour 17:00 06:00 06:00 06:00 Min .004 5.8 12.5 4.4 Count 23 24 24 24 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error Ozone O3_Auto ZERO 17-Jun-2026 22:50:00 23:20:00 -0.001 0.0 0.00 PREC 17-Jun-2026 22:50:00 23:50:00 0.068 0.07 -2.69% Date Printed: 6/18/2026 01:30 Daily Summary Report Site: Hattie Avenue (A) 6/17/2026 Interval: 001h Ozone NO NO2 NOx SO2 Time ppm ppb ppb ppb ppb 00:00 .034 .1 4.8 5.0 -.2 01:00 .030 .2 5.1 5.3 -.3 02:00 .026 .3 6.1 6.4 -.3 03:00 .024 .3 5.9 6.3 -.4 04:00 .021 .3 6.7 7.1 -.5 05:00 .016 .8 9.2 10.1 -.5 06:00 .025 1.0 6.4 7.4 -.4 07:00 .037 .8 4.7 5.5 -.4 08:00 .045 .7 3.9 4.6 -.4 09:00 .053 .3 2.2 2.5 -.4 10:00 .058 .2 1.9 2.1 -.4 11:00 .059 .2 2.1 2.3 D 12:00 .063 .1 2.2 2.4 D 13:00 .060 .2 2.2 2.4 D 14:00 .060 .1 2.0 2.2 -.4 D 15:00 .062 .2 C 2.1 C 2.4 C -.4 16:00 .064 C C C -.4 17:00 .071 .2 C 3.1 C 3.3 C -.2 18:00 .067 .1 3.5 3.6 -.3 19:00 .062 .0 4.1 4.1 -.3 C 20:00 .054 .1 5.7 5.8 C 21:00 .050 .0 4.2 4.3 -.4 C 22:00 .047 C .0 3.2 3.3 -.4 23:00 C .1 2.6 2.7 -.4 Average .047 .2 4.0 4.3 -.3 Max .071 1.0 9.2 10.1 -.2 Max Hour 17:00 06:00 05:00 05:00 17:00 Min .016 .0 1.9 2.1 -.5 Count 23 23 23 23 20 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error NO NOx_Auto NO-PREC 17-Jun-2026 15:46:00 16:11:00 67 70 -4.25% GPT-PS 17-Jun-2026 15:46:00 16:18:00 0.3 0.0 .38 GPTZ 17-Jun-2026 15:46:00 16:38:00 215.6 225 -4.15% GPT-PREC 17-Jun-2026 15:46:00 17:08:00 150.2 155 -3.07% NO2 GPT-PREC 17-Jun-2026 15:46:00 17:08:00 66.1 70 -5.46% NO2 Precision NO2_Diff PRECDIFF 17-Jun-2026 17:15:00 17:15:05 65.4 66.177 -1.16% NOx NOx_Auto NO-PREC 17-Jun-2026 15:46:00 16:11:00 67.1 70 -4.06% Ozone O3_Auto ZERO 17-Jun-2026 22:50:00 23:20:00 0 0.0 0.00 PREC 17-Jun-2026 22:50:00 23:50:00 0.068 0.07 -2.49% SO2 SO2_Auto ZERO 17-Jun-2026 19:46:00 20:11:00 -0.6 0.0 -.6 SPAN 17-Jun-2026 19:46:00 20:36:00 87.5 90 -2.71% PREC 17-Jun-2026 19:46:00 21:01:00 38.3 40 -4.07% Date Printed: 6/18/2026 01:30 Daily Summary Report Site: Hattie Avenue (B) 6/17/2026 Interval: 001h PM2.5 PM10 STP PM Coarse Time ug/m3 ug/m3 ug/m3 00:00 12.1 21.2 8.6 01:00 12.5 20.0 7.0 02:00 13.3 20.5 6.8 03:00 12.9 21.1 7.9 04:00 12.7 20.0 7.0 05:00 13.2 21.5 8.0 06:00 13.6 23.6 9.4 07:00 10.9 23.3 11.6 08:00 9.3 25.1 14.8 09:00 7.2 19.3 11.2 10:00 6.9 18.2 10.4 11:00 6.5 18.0 10.4 12:00 7.0 17.7 9.7 13:00 B B B 14:00 B B B 15:00 6.2 15.5 8.3 16:00 6.6 15.5 8.0 17:00 7.6 18.6 9.9 18:00 8.5 18.4 8.9 19:00 8.5 18.1 8.7 20:00 9.1 22.0 11.9 21:00 9.1 20.0 10.1 22:00 8.4 19.2 10.0 23:00 8.8 17.3 7.8 Average 9.5 19.7 9.3 Max 13.6 25.1 14.8 Max Hour 06:00 08:00 08:00 Min 6.2 15.5 6.8 Count 22 22 22 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error 0.0 -4.07% Date Printed: 6/18/2026 01:30 Daily Summary Report Site: Union Cross 6/17/2026 Interval: 001h Ozone Barometric Pres. Temperature (°F) Dew Point (°F) Time ppm mmHg DegF DegF 00:00 .034 731.7 67.8 60.2 01:00 .033 731.7 67.0 61.1 02:00 .028 731.7 65.6 61.5 03:00 .024 731.6 64.4 61.8 04:00 .021 731.9 63.5 62.0 05:00 .017 732.3 63.1 62.2 06:00 .019 732.6 65.7 63.3 07:00 D 732.7 69.9 62.1 08:00 D 733.0 75.4 60.0 09:00 .056 732.7 78.5 58.8 10:00 .060 732.5 80.7 59.0 11:00 .063 732.3 82.8 59.8 12:00 .064 732.0 84.3 60.8 13:00 .061 731.9 85.4 61.3 14:00 .061 731.7 86.6 61.4 15:00 .061 731.1 87.2 61.5 16:00 .065 731.3 87.2 61.7 17:00 .070 731.4 86.3 61.8 18:00 .068 731.5 84.3 62.2 19:00 .061 731.4 81.9 61.4 20:00 .054 731.6 79.1 60.1 21:00 .050 732.0 78.3 60.5 22:00 .045 C 732.3 76.8 60.7 23:00 C 732.1 76.2 62.3 Average .048 731.9 76.5 61.1 Max .070 733.0 87.2 63.3 Max Hour 17:00 08:00 16:00 06:00 Min .017 731.1 63.1 58.8 Count 21 24 24 24 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error Ozone O3_Auto ZERO 17-Jun-2026 22:50:00 23:20:00 0 0.0 0.00 PREC 17-Jun-2026 22:50:00 23:50:00 0.071 0.07 1.31% 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