Date Printed: 4/30/2026 01:30 Daily Summary Report Site: Clemmons Middle 4/29/2026 Interval: 001h Ozone PM2.5 PM10 LC PM Coarse Time ppm ug/m3 ug/m3 ug/m3 00:00 .009 6.5 12.3 5.8 01:00 .006 7.1 12.4 5.2 02:00 .009 7.5 12.6 5.1 03:00 .009 7.6 13.7 6.1 04:00 .007 7.7 13.7 5.9 05:00 .009 8.2 14.5 6.3 06:00 .011 8.1 14.4 6.3 07:00 .013 8.2 14.2 5.9 08:00 .015 8.8 14.9 6.0 09:00 .021 9.1 18.1 9.0 10:00 .024 8.1 13.2 5.0 11:00 .024 9.2 14.9 5.7 12:00 .024 12.5 19.5 6.9 13:00 .030 13.3 21.8 8.4 14:00 .039 10.9 16.9 5.9 15:00 .042 B 9.4 14.6 5.1 16:00 .042 8.9 15.6 6.6 17:00 .044 9.4 15.6 6.2 18:00 .038 9.3 17.7 8.3 19:00 .027 8.9 15.6 6.6 20:00 .023 8.5 14.7 6.2 21:00 .029 7.5 13.6 6.0 22:00 .028 C 6.0 12.1 6.1 23:00 C 5.3 11.8 6.5 Average .022 8.5 14.9 6.2 Max .044 13.3 21.8 9.0 Max Hour 17:00 13:00 13:00 09:00 Min .006 5.3 11.8 5.0 Count 23 24 24 24 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error Ozone O3_Auto ZERO 29-Apr-2026 22:50:00 23:20:00 0.001 0.0 0.00 PREC 29-Apr-2026 22:50:00 23:50:00 0.071 0.07 3.09% Date Printed: 4/30/2026 01:30 Daily Summary Report Site: Hattie Avenue (A) 4/29/2026 Interval: 001h Ozone NO NO2 NOx SO2 Time ppm ppb ppb ppb ppb 00:00 .012 .3 6.2 6.6 .0 01:00 .009 .4 6.6 7.1 .0 02:00 .010 .3 6.0 6.4 .0 03:00 .011 .3 4.6 5.0 .0 04:00 .012 .3 6.3 6.7 .1 05:00 .010 .5 8.2 8.8 .1 06:00 .012 1.0 B 7.4 B 8.4 B .0 07:00 .012 B B B .2 08:00 .012 B B B .3 09:00 .022 B B B .2 10:00 .023 B B B .2 11:00 .023 .7 B 4.0 B 4.7 B .1 12:00 .022 .7 4.6 5.3 .1 13:00 .024 .9 4.2 5.2 .1 14:00 .034 .9 3.7 4.7 .1 15:00 .040 .6 C 2.9 C 3.5 C .1 16:00 .041 C C C .1 17:00 .039 .3 C 3.2 C 3.5 C .1 18:00 .033 .4 7.1 7.5 .1 19:00 .031 .1 8.8 9.0 .1 C 20:00 .024 .4 11.3 11.7 C 21:00 .031 .1 4.4 4.6 .1 C 22:00 .029 C .1 5.8 6.0 .1 23:00 C .1 5.3 5.5 .1 Average .022 .4 5.8 6.3 .1 Max .041 1.0 11.3 11.7 .3 Max Hour 16:00 06:00 20:00 20:00 08:00 Min .009 .1 2.9 3.5 .0 Count 23 19 19 19 23 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error NO NOx_Auto NO-PREC 29-Apr-2026 15:46:00 16:11:00 67.4 70 -3.71% GPT-PS 29-Apr-2026 15:46:00 16:18:00 0.4 0.0 .48 GPTZ 29-Apr-2026 15:46:00 16:38:00 217.2 225 -3.44% GPT-PREC 29-Apr-2026 15:46:00 17:08:00 152.2 155 -1.76% NO2 GPT-PREC 29-Apr-2026 15:46:00 17:08:00 65.7 70 -6.09% NO2 Precision NO2_Diff PRECDIFF 29-Apr-2026 17:15:00 17:15:05 64.9 65.74 -1.13% NOx NOx_Auto NO-PREC 29-Apr-2026 15:46:00 16:11:00 67.2 70 -3.87% Ozone O3_Auto ZERO 29-Apr-2026 22:50:00 23:20:00 0 0.0 0.00 PREC 29-Apr-2026 22:50:00 23:50:00 0.067 0.07 -2.92% SO2 SO2_Auto ZERO 29-Apr-2026 19:46:00 20:11:00 0 0.0 .08 SPAN 29-Apr-2026 19:46:00 20:36:00 85.2 90 -5.23% PREC 29-Apr-2026 19:46:00 21:01:00 37.6 40 -5.75% Date Printed: 4/30/2026 01:30 Daily Summary Report Site: Hattie Avenue (B) 4/29/2026 Interval: 001h PM2.5 PM10 STP PM Coarse Time ug/m3 ug/m3 ug/m3 00:00 7.9 13.1 5.3 01:00 9.1 14.7 5.7 02:00 8.8 12.9 4.2 03:00 8.7 14.0 5.3 04:00 9.9 16.9 7.0 05:00 9.3 15.1 5.8 06:00 9.9 17.9 8.0 07:00 11.1 18.9 7.7 08:00 11.5 19.3 7.6 09:00 9.9 15.5 5.4 10:00 9.9 15.0 4.9 11:00 10.4 16.5 5.8 12:00 12.6 20.8 7.9 13:00 16.2 25.7 9.1 14:00 14.5 23.0 7.9 15:00 12.2 20.5 7.5 16:00 10.5 17.6 6.5 17:00 10.1 16.6 5.9 18:00 10.4 18.4 7.3 19:00 11.0 18.4 6.9 20:00 10.7 20.3 9.1 21:00 7.6 17.6 9.6 22:00 6.2 14.8 8.4 23:00 5.7 14.6 8.8 Average 10.1 17.4 6.9 Max 16.2 25.7 9.6 Max Hour 13:00 13:00 21:00 Min 5.7 12.9 4.2 Count 24 24 24 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error 0.0 -5.75% Date Printed: 4/30/2026 01:30 Daily Summary Report Site: Union Cross 4/29/2026 Interval: 001h Ozone Barometric Pres. Temperature (°F) Dew Point (°F) Time ppm mmHg DegF DegF 00:00 .015 735.4 55.3 54.6 01:00 .011 735.2 55.0 54.7 02:00 .013 734.6 55.3 55.1 03:00 .013 734.8 55.3 55.2 04:00 .014 734.8 56.1 55.7 05:00 .015 734.9 56.6 56.1 06:00 .013 734.6 57.2 56.5 07:00 .013 734.1 58.6 57.2 08:00 .017 734.0 59.5 57.6 09:00 .020 733.6 60.1 58.4 10:00 .022 733.5 60.9 58.8 11:00 .024 733.2 61.4 59.3 12:00 .024 732.7 61.7 59.5 13:00 .028 732.1 64.4 59.9 14:00 .039 731.3 69.2 59.7 15:00 .043 730.6 71.7 60.5 16:00 .043 730.3 73.0 61.3 17:00 .044 729.9 73.3 61.4 18:00 .037 729.8 71.9 61.7 19:00 .030 730.1 69.5 61.4 20:00 .029 730.6 68.1 61.2 21:00 .035 731.3 67.4 59.1 22:00 .035 C 731.3 65.8 56.6 23:00 C 731.3 63.8 56.1 Average .025 732.6 62.9 58.2 Max .044 735.4 73.3 61.7 Max Hour 17:00 00:00 17:00 18:00 Min .011 729.8 55.0 54.6 Count 23 24 24 24 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error Ozone O3_Auto ZERO 29-Apr-2026 22:50:00 23:20:00 0 0.0 0.00 PREC 29-Apr-2026 22:50:00 23:50:00 0.07 0.07 .38% 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