Date Printed: 6/20/2026 01:30 Daily Summary Report Site: Clemmons Middle 6/19/2026 Interval: 001h Ozone PM2.5 PM10 LC PM Coarse Time ppm ug/m3 ug/m3 ug/m3 00:00 .006 4.2 13.2 8.9 01:00 .007 4.1 13.0 8.9 02:00 .010 3.4 10.7 7.2 03:00 .014 3.0 11.2 8.1 04:00 .015 2.6 8.5 5.8 05:00 .013 2.2 8.6 6.3 06:00 .011 2.1 7.9 5.8 07:00 .012 1.7 6.3 4.5 08:00 .013 B 2.2 5.9 3.6 09:00 .017 2.5 5.8 3.2 10:00 .023 2.6 8.0 5.4 11:00 .039 3.7 11.0 7.3 12:00 .043 5.0 12.9 7.8 13:00 .044 5.3 12.3 6.9 14:00 .046 4.2 10.6 6.4 15:00 .048 4.3 9.7 5.4 16:00 .048 4.3 10.5 6.2 17:00 .048 3.8 8.8 5.0 18:00 .046 3.5 7.7 4.1 19:00 .041 3.3 7.8 4.5 20:00 .036 3.4 8.6 5.2 21:00 .029 3.5 10.2 6.7 22:00 .029 C 3.5 10.9 7.4 23:00 C 3.6 11.4 7.8 Average .027 3.4 9.6 6.1 Max .048 5.3 13.2 8.9 Max Hour 17:00 13:00 00:00 01:00 Min .006 1.7 5.8 3.2 Count 23 24 24 24 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error Ozone O3_Auto ZERO 19-Jun-2026 22:50:00 23:20:00 -0.002 0.0 0.00 PREC 19-Jun-2026 22:50:00 23:50:00 0.067 0.07 -3.47% Date Printed: 6/20/2026 01:30 Daily Summary Report Site: Hattie Avenue (A) 6/19/2026 Interval: 001h Ozone NO NO2 NOx SO2 Time ppm ppb ppb ppb ppb 00:00 .008 4.2 7.2 11.4 -.4 01:00 .008 3.1 6.8 9.9 -.5 02:00 .011 .8 5.2 6.0 -.5 03:00 .015 .5 4.7 5.2 -.5 04:00 .017 .8 3.3 4.2 -.5 05:00 .014 .9 4.1 5.0 -.5 06:00 .012 1.7 5.7 7.4 -.5 07:00 .012 2.3 5.3 7.6 -.5 08:00 .013 2.5 4.5 7.0 -.4 09:00 .017 1.9 3.2 5.1 -.4 10:00 .023 1.5 2.6 4.2 -.5 11:00 .036 1.1 2.4 3.6 -.4 12:00 .044 .9 2.4 3.4 -.5 13:00 .045 1.0 2.6 3.7 -.4 14:00 .046 1.0 2.8 3.9 -.5 15:00 .047 .9 C 2.8 C 3.8 C -.5 16:00 .047 C C C -.4 17:00 .045 1.1 C 4.6 C 5.7 C -.4 18:00 .041 1.2 5.8 7.1 -.5 19:00 .039 .9 6.9 8.0 -.4 C 20:00 .034 .8 9.6 10.4 C 21:00 .033 1.5 9.2 10.7 -.5 C 22:00 .036 C 1.0 6.3 7.4 -.5 23:00 C .5 7.1 7.6 -.5 Average .027 1.3 5.0 6.4 -.4 Max .047 4.2 9.6 11.4 -.4 Max Hour 16:00 00:00 20:00 00:00 19:00 Min .008 .5 2.4 3.4 -.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 19-Jun-2026 15:46:00 16:11:00 66.5 70 -4.94% GPT-PS 19-Jun-2026 15:46:00 16:18:00 0.4 0.0 .42 GPTZ 19-Jun-2026 15:46:00 16:38:00 215.2 225 -4.34% GPT-PREC 19-Jun-2026 15:46:00 17:08:00 150.1 155 -3.1% NO2 GPT-PREC 19-Jun-2026 15:46:00 17:08:00 65.4 70 -6.45% NO2 Precision NO2_Diff PRECDIFF 19-Jun-2026 17:15:00 17:15:05 65 65.486 -.69% NOx NOx_Auto NO-PREC 19-Jun-2026 15:46:00 16:11:00 66.6 70 -4.75% Ozone O3_Auto ZERO 19-Jun-2026 22:50:00 23:20:00 0 0.0 0.00 PREC 19-Jun-2026 22:50:00 23:50:00 0.067 0.07 -3.19% SO2 SO2_Auto ZERO 19-Jun-2026 19:46:00 20:11:00 -0.6 0.0 -.69 SPAN 19-Jun-2026 19:46:00 20:36:00 87.3 90 -2.99% PREC 19-Jun-2026 19:46:00 21:01:00 38.2 40 -4.37% Date Printed: 6/20/2026 01:30 Daily Summary Report Site: Hattie Avenue (B) 6/19/2026 Interval: 001h PM2.5 PM10 STP PM Coarse Time ug/m3 ug/m3 ug/m3 00:00 5.7 18.0 11.7 01:00 5.6 19.2 13.0 02:00 4.4 15.7 10.9 03:00 3.9 12.0 7.7 04:00 3.4 15.6 11.7 05:00 3.1 13.2 9.7 06:00 3.0 10.8 7.5 07:00 2.5 8.0 5.2 08:00 2.6 8.5 5.6 09:00 2.9 8.7 5.4 10:00 3.1 10.5 6.9 11:00 3.6 13.7 9.3 12:00 5.4 20.1 13.6 13:00 5.3 16.2 9.9 14:00 5.1 15.5 9.4 15:00 5.3 15.0 8.9 16:00 5.0 14.1 8.3 17:00 4.6 12.1 6.9 18:00 4.3 10.3 5.6 19:00 3.7 9.8 5.7 20:00 3.6 9.0 5.1 21:00 3.6 10.4 6.5 22:00 3.6 9.5 5.7 23:00 3.4 8.7 5.1 Average 4.0 12.6 8.1 Max 5.7 20.1 13.6 Max Hour 00:00 12:00 12:00 Min 2.5 8.0 5.1 Count 24 24 24 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error 0.0 -4.37% Date Printed: 6/20/2026 01:30 Daily Summary Report Site: Union Cross 6/19/2026 Interval: 001h Ozone Barometric Pres. Temperature (°F) Dew Point (°F) Time ppm mmHg DegF DegF 00:00 .009 732.8 72.1 71.7 01:00 .012 732.6 71.0 70.6 02:00 .013 732.1 70.3 70.0 03:00 .018 731.6 68.8 68.4 04:00 .017 731.9 68.9 68.7 05:00 .017 732.1 69.1 68.9 06:00 .014 732.2 69.3 69.2 07:00 .015 732.0 70.0 69.7 08:00 .016 732.3 71.0 70.0 09:00 .020 732.3 73.1 69.7 10:00 .027 732.5 75.8 68.8 11:00 .035 732.5 78.6 67.9 12:00 .047 732.8 80.4 63.9 13:00 .048 732.9 81.5 63.5 14:00 .049 732.9 82.8 62.4 15:00 .050 732.7 83.9 61.9 16:00 .051 733.0 83.9 61.2 17:00 .050 733.5 83.3 60.3 18:00 .048 733.9 81.2 59.3 19:00 .046 734.4 78.8 57.6 20:00 .041 735.0 75.6 56.0 21:00 .037 735.6 72.9 54.9 22:00 .041 C 735.7 72.1 53.9 23:00 C 735.8 70.3 53.3 Average .031 733.1 75.1 64.2 Max .051 735.8 83.9 71.7 Max Hour 16:00 23:00 16:00 00:00 Min .009 731.6 68.8 53.3 Count 23 24 24 24 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error Ozone O3_Auto ZERO 19-Jun-2026 22:50:00 23:20:00 0 0.0 0.00 PREC 19-Jun-2026 22:50:00 23:50:00 0.07 0.07 .82% 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