Date Printed: 7/21/2026 01:30 Daily Summary Report Site: Clemmons Middle 7/20/2026 Interval: 001h Ozone PM2.5 PM10 LC PM Coarse Time ppm ug/m3 ug/m3 ug/m3 00:00 .017 6.9 15.3 8.4 01:00 .022 6.0 13.8 7.7 02:00 .023 B 5.1 12.8 7.6 03:00 .020 4.9 13.2 8.2 04:00 .013 5.2 15.4 10.2 05:00 .007 5.2 14.3 9.1 06:00 .010 5.0 15.0 9.9 07:00 .013 5.2 13.4 8.1 08:00 .021 7.8 16.2 8.3 09:00 .025 9.9 19.4 9.4 10:00 .037 12.2 21.1 8.8 11:00 .048 12.2 21.8 9.6 12:00 .053 11.4 22.2 10.7 13:00 .053 10.7 22.9 12.2 14:00 .052 9.4 20.4 10.9 15:00 .052 9.5 22.3 12.7 16:00 .049 9.8 24.2 14.4 17:00 .050 8.4 18.6 10.1 18:00 .045 4.7 15.8 11.1 19:00 .038 B 5.0 28.4 23.4 20:00 .028 4.1 22.3 18.1 21:00 .020 4.0 18.9 14.8 22:00 .018 C 4.9 17.6 12.6 23:00 C 6.8 17.5 10.7 Average .031 7.2 18.4 11.1 Max .053 12.2 28.4 23.4 Max Hour 13:00 11:00 19:00 19:00 Min .007 4.0 12.8 7.6 Count 23 24 24 24 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error Ozone O3_Auto ZERO 20-Jul-2026 22:50:00 23:20:00 -0.002 0.0 0.00 PREC 20-Jul-2026 22:50:00 23:50:00 0.067 0.07 -3.58% Date Printed: 7/21/2026 01:30 Daily Summary Report Site: Hattie Avenue (A) 7/20/2026 Interval: 001h Ozone NO NO2 NOx SO2 Time ppm ppb ppb ppb ppb 00:00 .024 .3 5.4 5.8 .3 01:00 .026 .3 3.7 4.0 .2 02:00 .026 .4 3.8 4.2 .1 03:00 .025 .5 4.1 4.6 .2 04:00 .019 .7 6.5 7.3 .2 05:00 .014 .6 6.0 6.7 .2 06:00 .016 .9 7.6 8.5 .2 07:00 .020 1.0 3.4 4.4 .2 08:00 .020 1.3 6.7 8.1 .3 09:00 .024 1.7 5.2 6.9 .2 10:00 .033 1.7 5.2 6.9 .3 11:00 .041 .6 2.6 3.2 .2 12:00 .049 .3 2.2 2.6 .2 13:00 .054 .3 2.3 2.7 .2 14:00 .056 .3 2.6 3.0 .2 15:00 .058 .3 C 3.0 C 3.3 C .2 16:00 .050 C C C .1 17:00 .047 .4 C 3.5 C 4.0 C .1 18:00 .040 .3 4.0 4.3 .1 19:00 .042 .3 3.5 3.8 .1 C 20:00 .035 .2 3.8 4.1 C 21:00 .027 .3 4.7 5.0 .1 C 22:00 .026 C .1 4.1 4.3 .1 23:00 C .1 2.4 2.6 .1 Average .033 .5 4.1 4.7 .1 Max .058 1.7 7.6 8.5 .3 Max Hour 15:00 10:00 06:00 06:00 10:00 Min .014 .1 2.2 2.6 .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 20-Jul-2026 15:46:00 16:11:00 66.1 70 -5.55% GPT-PS 20-Jul-2026 15:46:00 16:18:00 0.6 0.0 .63 GPTZ 20-Jul-2026 15:46:00 16:38:00 213.9 225 -4.89% GPT-PREC 20-Jul-2026 15:46:00 17:08:00 149.5 155 -3.53% NO2 GPT-PREC 20-Jul-2026 15:46:00 17:08:00 65 70 -7.05% NO2 Precision NO2_Diff PRECDIFF 20-Jul-2026 17:15:00 17:15:05 64.4 65.067 -.93% NOx NOx_Auto NO-PREC 20-Jul-2026 15:46:00 16:11:00 66.7 70 -4.63% Ozone O3_Auto ZERO 20-Jul-2026 22:50:00 23:20:00 0 0.0 0.00 PREC 20-Jul-2026 22:50:00 23:50:00 0.067 0.07 -3.22% SO2 SO2_Auto ZERO 20-Jul-2026 19:46:00 20:11:00 0 0.0 -.01 SPAN 20-Jul-2026 19:46:00 20:36:00 90.2 90 .24% PREC 20-Jul-2026 19:46:00 21:01:00 39.9 40 -.23% Date Printed: 7/21/2026 01:30 Daily Summary Report Site: Hattie Avenue (B) 7/20/2026 Interval: 001h PM2.5 PM10 STP PM Coarse Time ug/m3 ug/m3 ug/m3 00:00 8.0 18.0 9.3 01:00 7.1 16.5 8.9 02:00 6.1 15.6 8.9 03:00 5.5 14.2 8.3 04:00 6.0 14.9 8.3 05:00 6.6 17.3 10.2 06:00 7.5 17.8 9.7 07:00 10.5 22.2 10.9 08:00 13.5 24.4 10.1 09:00 16.1 26.9 9.8 10:00 15.8 27.4 10.5 11:00 14.5 25.8 10.1 12:00 13.0 22.7 8.6 13:00 12.8 25.1 10.9 14:00 12.8 26.8 12.6 15:00 12.8 26.0 11.7 16:00 12.1 26.2 12.9 17:00 4.5 22.6 17.4 18:00 3.1 16.1 12.5 19:00 4.7 23.5 18.2 20:00 5.0 25.5 19.8 21:00 5.1 29.7 23.9 22:00 5.5 23.4 17.3 23:00 6.6 20.3 13.1 Average 8.9 22.0 12.2 Max 16.1 29.7 23.9 Max Hour 09:00 21:00 21:00 Min 3.1 14.2 8.3 Count 24 24 24 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error 0.0 -.23% Date Printed: 7/21/2026 01:30 Daily Summary Report Site: Union Cross 7/20/2026 Interval: 001h Ozone Barometric Pres. Temperature (°F) Dew Point (°F) Time ppm mmHg DegF DegF 00:00 .028 734.6 76.7 71.9 01:00 .032 734.5 75.2 70.5 02:00 .027 734.5 74.0 70.3 03:00 .024 734.5 73.6 70.5 04:00 .019 734.7 73.2 70.7 05:00 .015 735.0 72.9 71.2 06:00 .016 735.1 73.9 71.7 07:00 .016 735.4 75.6 72.3 08:00 .019 735.6 77.0 72.5 09:00 .026 735.7 77.8 72.5 10:00 .042 735.7 80.7 72.8 11:00 .047 735.7 82.7 73.6 12:00 .054 735.3 84.5 73.8 13:00 .055 734.7 87.7 74.4 14:00 .056 734.3 89.8 74.5 15:00 .057 733.9 90.6 74.4 16:00 .051 733.8 84.2 75.2 17:00 .043 734.3 75.9 73.5 18:00 .034 734.0 75.9 74.2 19:00 .040 734.6 73.3 69.3 20:00 .038 734.5 71.3 69.4 21:00 .026 734.6 72.6 71.5 22:00 .029 C 735.1 73.8 72.4 23:00 C 734.6 73.2 71.2 Average .034 734.7 77.7 72.2 Max .057 735.7 90.6 75.2 Max Hour 15:00 11:00 15:00 16:00 Min .015 733.8 71.3 69.3 Count 23 24 24 24 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error Ozone O3_Auto ZERO 20-Jul-2026 22:50:00 23:20:00 0 0.0 0.00 PREC 20-Jul-2026 22:50:00 23:50:00 0.07 0.07 .45% 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