Date Printed: 4/12/2026 01:30 Daily Summary Report Site: Clemmons Middle 4/11/2026 Interval: 001h Ozone PM2.5 PM10 LC PM Coarse Time ppm ug/m3 ug/m3 ug/m3 00:00 .025 7.5 20.0 12.5 01:00 .024 7.8 18.9 11.1 02:00 .018 7.5 16.3 8.8 03:00 .015 B 7.4 15.4 8.0 04:00 .013 7.9 15.5 7.6 05:00 .008 8.0 15.0 7.0 06:00 .006 7.9 15.2 7.3 07:00 .009 8.2 15.2 7.0 08:00 .022 8.5 17.5 9.0 09:00 .035 9.4 18.6 9.2 10:00 .052 10.5 20.8 10.3 11:00 .056 10.9 20.3 9.3 12:00 .058 10.8 19.6 8.7 13:00 .059 11.1 20.7 9.6 14:00 .060 10.3 18.9 8.5 15:00 .059 9.8 18.7 8.8 16:00 .056 10.0 19.5 9.4 17:00 .055 8.1 17.6 9.4 18:00 .049 7.6 23.7 16.1 19:00 .043 B 8.1 19.4 11.2 20:00 .037 9.7 19.3 9.6 21:00 .026 10.5 19.1 8.5 22:00 .020 C 12.0 20.2 8.1 23:00 C 14.4 21.2 6.8 Average .035 9.3 18.6 9.2 Max .060 14.4 23.7 16.1 Max Hour 14:00 23:00 18:00 18:00 Min .006 7.4 15.0 6.8 Count 23 24 24 24 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error Ozone O3_Auto ZERO 11-Apr-2026 22:50:00 23:20:00 0 0.0 0.00 PREC 11-Apr-2026 22:50:00 23:50:00 0.069 0.07 -.01% Date Printed: 4/12/2026 01:30 Daily Summary Report Site: Hattie Avenue (A) 4/11/2026 Interval: 001h Ozone NO NO2 NOx SO2 Time ppm ppb ppb ppb ppb 00:00 .042 .1 6.4 6.5 .2 01:00 .036 .1 6.9 7.1 .1 02:00 .027 .2 9.1 9.3 .0 03:00 .028 .2 8.6 8.8 .0 04:00 .025 .2 9.0 9.3 .0 05:00 .015 .3 13.0 13.4 .0 06:00 .009 4.6 15.6 20.3 .0 07:00 .010 6.6 12.3 18.9 .1 08:00 .035 2.3 7.9 10.2 .1 09:00 .052 .4 3.4 3.9 .1 10:00 .057 .3 2.3 2.7 .1 11:00 .058 .2 2.0 2.2 .0 12:00 .058 .1 1.8 2.0 .0 13:00 .059 .2 2.0 2.2 .0 14:00 .058 .1 2.0 2.2 .0 15:00 .058 .1 C 2.2 C 2.3 C .0 16:00 .056 C C C .0 17:00 .054 .2 C 3.0 C 3.2 C .0 18:00 .054 .0 2.9 3.0 .0 19:00 .044 .0 7.6 7.7 .0 C 20:00 .035 .1 12.1 12.3 C 21:00 .026 .3 14.6 14.9 .1 C 22:00 .040 C .1 6.5 6.7 .1 23:00 C .1 4.4 4.5 .1 Average .040 .7 6.7 7.5 .0 Max .059 6.6 15.6 20.3 .2 Max Hour 13:00 07:00 06:00 06:00 00:00 Min .009 .0 1.8 2.0 .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 11-Apr-2026 15:46:00 16:11:00 66.8 70 -4.54% GPT-PS 11-Apr-2026 15:46:00 16:18:00 0.4 0.0 .44 GPTZ 11-Apr-2026 15:46:00 16:38:00 215.8 225 -4.08% GPT-PREC 11-Apr-2026 15:46:00 17:08:00 151 155 -2.54% NO2 GPT-PREC 11-Apr-2026 15:46:00 17:08:00 65.6 70 -6.28% NO2 Precision NO2_Diff PRECDIFF 11-Apr-2026 17:15:00 17:15:05 64.7 65.603 -1.29% NOx NOx_Auto NO-PREC 11-Apr-2026 15:46:00 16:11:00 66.8 70 -4.47% Ozone O3_Auto ZERO 11-Apr-2026 22:50:00 23:20:00 0 0.0 0.00 PREC 11-Apr-2026 22:50:00 23:50:00 0.067 0.07 -4.38% SO2 SO2_Auto ZERO 11-Apr-2026 19:46:00 20:11:00 0 0.0 -.09 SPAN 11-Apr-2026 19:46:00 20:36:00 85.6 90 -4.86% PREC 11-Apr-2026 19:46:00 21:01:00 37.8 40 -5.36% Date Printed: 4/12/2026 01:30 Daily Summary Report Site: Hattie Avenue (B) 4/11/2026 Interval: 001h PM2.5 PM10 STP PM Coarse Time ug/m3 ug/m3 ug/m3 00:00 6.4 16.5 10.2 01:00 7.0 15.8 8.9 02:00 7.5 16.6 9.3 03:00 7.8 16.3 8.9 04:00 8.0 15.4 7.7 05:00 8.0 16.0 8.4 06:00 12.6 22.3 10.3 07:00 9.2 16.8 7.9 08:00 10.0 22.1 12.0 09:00 10.5 23.5 12.4 10:00 11.4 23.8 11.8 11:00 10.4 23.9 12.7 12:00 9.7 19.5 9.1 13:00 10.2 19.2 8.2 14:00 9.9 18.3 7.7 15:00 10.1 19.1 8.3 16:00 10.1 19.4 8.5 17:00 9.6 19.2 8.9 18:00 8.8 17.6 8.4 19:00 10.8 22.1 10.9 20:00 14.4 26.2 11.6 21:00 16.9 26.6 9.6 22:00 11.8 19.4 7.4 23:00 11.0 18.9 7.8 Average 10.0 19.7 9.4 Max 16.9 26.6 12.7 Max Hour 21:00 21:00 11:00 Min 6.4 15.4 7.4 Count 24 24 24 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error 0.0 -5.36% Date Printed: 4/12/2026 01:30 Daily Summary Report Site: Union Cross 4/11/2026 Interval: 001h Ozone Barometric Pres. Temperature (°F) Dew Point (°F) Time ppm mmHg DegF DegF 00:00 .041 741.6 59.2 40.9 01:00 .044 741.3 58.6 40.7 02:00 .042 741.1 56.9 40.4 03:00 .042 741.1 55.5 40.5 04:00 .040 741.3 53.6 40.4 05:00 .036 741.8 52.3 40.2 06:00 .030 742.3 52.0 40.7 07:00 .029 742.7 54.7 42.2 08:00 .029 742.9 60.0 45.2 09:00 .045 743.0 68.6 48.5 10:00 .059 743.0 73.7 51.4 11:00 .060 742.7 75.6 53.2 12:00 .059 742.1 77.9 54.4 13:00 .060 741.7 79.5 55.4 14:00 .061 741.2 81.1 56.4 15:00 .060 741.0 80.2 55.9 16:00 .059 740.9 80.7 56.2 17:00 .058 741.1 80.2 56.2 18:00 .055 741.5 75.9 54.5 19:00 .046 742.0 71.3 52.6 20:00 .041 742.4 69.4 52.4 21:00 .038 742.5 68.2 51.4 22:00 .035 C 742.6 67.8 51.2 23:00 C 742.7 66.3 50.6 Average .046 741.9 67.4 48.8 Max .061 743.0 81.1 56.4 Max Hour 14:00 10:00 14:00 14:00 Min .029 740.9 52.0 40.2 Count 23 24 24 24 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error Ozone O3_Auto ZERO 11-Apr-2026 22:50:00 23:20:00 0 0.0 0.00 PREC 11-Apr-2026 22:50:00 23:50:00 0.07 0.07 .59% 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