Date Printed: 4/18/2026 01:30 Daily Summary Report Site: Clemmons Middle 4/17/2026 Interval: 001h Ozone PM2.5 PM10 LC PM Coarse Time ppm ug/m3 ug/m3 ug/m3 00:00 .043 7.9 16.4 8.4 01:00 .035 7.8 16.0 8.2 02:00 .029 7.7 16.1 8.4 03:00 .029 7.5 14.0 6.5 04:00 .021 7.4 14.1 6.6 05:00 .017 7.8 14.9 7.1 06:00 .010 9.2 34.0 24.7 07:00 .023 8.7 27.2 18.5 08:00 .029 9.9 24.3 14.4 09:00 .045 7.1 14.5 7.4 10:00 .055 5.5 14.2 8.7 11:00 .059 5.2 15.1 9.8 12:00 .061 5.6 15.6 9.9 13:00 .062 5.7 16.8 11.0 14:00 .062 5.5 17.4 11.9 15:00 .061 5.3 13.4 8.0 16:00 .059 5.2 15.8 10.6 17:00 .060 5.0 14.9 9.8 18:00 .056 5.3 19.4 14.0 19:00 .043 10.4 65.5 55.0 20:00 .041 7.0 24.6 17.6 21:00 .035 6.6 21.6 14.9 22:00 .026 C 6.5 15.4 8.8 23:00 C 7.5 17.9 10.4 Average .041 6.9 19.9 12.9 Max .062 10.4 65.5 55.0 Max Hour 14:00 19:00 19:00 19:00 Min .010 5.0 13.4 6.5 Count 23 24 24 24 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error Ozone O3_Auto ZERO 17-Apr-2026 22:50:00 23:20:00 0 0.0 0.00 PREC 17-Apr-2026 22:50:00 23:50:00 0.069 0.07 -1.41% Date Printed: 4/18/2026 01:30 Daily Summary Report Site: Hattie Avenue (A) 4/17/2026 Interval: 001h Ozone NO NO2 NOx SO2 Time ppm ppb ppb ppb ppb 00:00 .046 .0 3.8 3.9 .2 01:00 .040 .1 4.4 4.6 .2 02:00 .037 .1 5.1 5.3 .1 03:00 .030 .2 5.8 6.0 .1 04:00 .023 .3 7.5 7.9 .0 05:00 .018 .4 7.8 8.2 .0 06:00 .007 4.1 12.6 16.8 .1 07:00 .022 3.5 10.9 14.4 .1 08:00 .041 .7 4.4 5.2 .1 09:00 .051 .4 2.6 3.1 .1 10:00 .058 .3 2.2 2.5 .2 11:00 .060 .1 2.0 2.2 .1 12:00 .059 .1 2.2 2.4 .1 13:00 .060 .1 2.2 2.4 .1 14:00 .061 .1 2.2 2.4 .1 15:00 .060 .1 C 2.4 C 2.6 C .0 16:00 .059 C C C .1 17:00 .058 .0 C 2.7 C 2.8 C .0 18:00 .056 .0 3.8 3.9 .0 19:00 .044 .1 11.1 11.2 .1 C 20:00 .027 .2 18.6 18.9 C 21:00 .023 .2 17.0 17.2 .1 C 22:00 .017 C .5 17.9 18.4 .3 23:00 C .6 16.2 16.9 .2 Average .041 .5 7.1 7.7 .1 Max .061 4.1 18.6 18.9 .3 Max Hour 14:00 06:00 20:00 20:00 22:00 Min .007 .0 2.0 2.2 .0 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-Apr-2026 15:46:00 16:11:00 67.1 70 -4.12% GPT-PS 17-Apr-2026 15:46:00 16:18:00 0.5 0.0 .53 GPTZ 17-Apr-2026 15:46:00 16:38:00 216.9 225 -3.58% GPT-PREC 17-Apr-2026 15:46:00 17:08:00 151.4 155 -2.27% NO2 GPT-PREC 17-Apr-2026 15:46:00 17:08:00 66.4 70 -5.09% NO2 Precision NO2_Diff PRECDIFF 17-Apr-2026 17:15:00 17:15:05 65.4 66.435 -1.44% NOx NOx_Auto NO-PREC 17-Apr-2026 15:46:00 16:11:00 67.4 70 -3.67% Ozone O3_Auto ZERO 17-Apr-2026 22:50:00 23:20:00 0 0.0 0.00 PREC 17-Apr-2026 22:50:00 23:50:00 0.067 0.07 -3.75% SO2 SO2_Auto ZERO 17-Apr-2026 19:46:00 20:11:00 0 0.0 .01 SPAN 17-Apr-2026 19:46:00 20:36:00 85.6 90 -4.79% PREC 17-Apr-2026 19:46:00 21:01:00 37.8 40 -5.41% Date Printed: 4/18/2026 01:30 Daily Summary Report Site: Hattie Avenue (B) 4/17/2026 Interval: 001h PM2.5 PM10 STP PM Coarse Time ug/m3 ug/m3 ug/m3 00:00 9.0 21.0 11.5 01:00 8.1 17.1 8.7 02:00 8.1 18.2 9.8 03:00 7.8 18.2 10.2 04:00 7.5 19.5 11.8 05:00 7.0 13.1 6.0 06:00 7.2 13.9 6.5 07:00 7.4 16.5 8.7 08:00 7.3 20.6 12.7 09:00 6.4 16.2 9.2 10:00 5.6 19.6 13.2 11:00 5.6 16.7 10.3 12:00 6.1 16.4 9.5 13:00 6.1 17.2 10.3 14:00 5.9 15.1 8.5 15:00 5.7 18.2 11.5 16:00 5.4 17.2 10.9 17:00 5.3 17.6 11.5 18:00 5.5 21.9 15.6 19:00 6.4 17.9 11.0 20:00 7.8 20.9 12.6 21:00 8.4 22.8 14.1 22:00 13.9 26.3 12.1 23:00 11.0 21.0 9.8 Average 7.2 18.4 10.6 Max 13.9 26.3 15.6 Max Hour 22:00 22:00 18:00 Min 5.3 13.1 6.0 Count 24 24 24 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error 0.0 -5.41% Date Printed: 4/18/2026 01:30 Daily Summary Report Site: Union Cross 4/17/2026 Interval: 001h Ozone Barometric Pres. Temperature (°F) Dew Point (°F) Time ppm mmHg DegF DegF 00:00 .047 734.9 69.8 51.8 01:00 .044 734.6 67.6 51.6 02:00 .041 734.5 66.0 51.6 03:00 .031 734.5 04:00 .025 734.9 62.8 54.3 05:00 .019 735.3 61.6 55.4 06:00 .018 735.7 62.4 56.6 07:00 .025 736.2 65.8 58.5 08:00 .028 736.6 70.2 60.3 09:00 .049 736.9 74.1 57.9 10:00 .058 736.9 76.6 55.7 11:00 .061 736.5 78.4 55.7 12:00 .063 736.2 80.0 56.9 13:00 .062 735.8 80.9 57.7 14:00 .063 735.3 81.8 58.3 15:00 .062 735.1 81.6 58.2 16:00 .061 734.9 81.6 58.6 17:00 .061 734.8 82.1 58.9 18:00 .054 734.7 79.7 57.7 19:00 .050 734.8 76.1 55.8 20:00 .045 734.9 72.5 54.5 21:00 .040 735.0 69.8 53.8 22:00 .041 C 735.2 68.0 53.1 23:00 C 735.2 66.8 52.7 Average .045 735.3 72.8 55.8 Max .063 736.9 82.1 60.3 Max Hour 14:00 10:00 17:00 08:00 Min .018 734.5 61.6 51.6 Count 23 24 23 23 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error Ozone O3_Auto ZERO 17-Apr-2026 22:50:00 23:20:00 0 0.0 0.00 PREC 17-Apr-2026 22:50:00 23:50:00 0.069 0.07 .54% 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