Date Printed: 4/19/2026 01:30 Daily Summary Report Site: Clemmons Middle 4/18/2026 Interval: 001h Ozone PM2.5 PM10 LC PM Coarse Time ppm ug/m3 ug/m3 ug/m3 00:00 .015 B 7.8 15.8 7.9 01:00 .012 7.9 15.4 7.5 02:00 .010 7.9 13.7 5.8 03:00 .007 8.0 13.6 5.6 04:00 .006 7.8 13.3 5.4 05:00 .004 8.8 27.9 19.0 06:00 .004 8.5 21.0 12.5 07:00 .007 8.8 15.8 6.9 08:00 .021 10.2 17.6 7.4 09:00 .048 9.5 20.2 10.7 10:00 .057 8.6 19.6 11.0 11:00 .065 8.3 19.9 11.6 12:00 .068 7.3 17.4 10.1 13:00 .071 6.8 17.3 10.5 14:00 .069 6.7 18.9 12.2 15:00 .066 6.0 17.8 11.8 16:00 .068 B 5.7 15.7 10.0 17:00 .065 6.4 16.2 9.7 18:00 .061 7.6 18.1 10.5 19:00 .059 8.6 18.3 9.7 20:00 .056 8.8 20.1 11.3 21:00 .052 9.3 17.3 8.0 22:00 .049 C 10.0 19.3 9.3 23:00 C 10.6 19.4 8.8 Average .040 8.1 17.9 9.7 Max .071 10.6 27.9 19.0 Max Hour 13:00 23:00 05:00 05:00 Min .004 5.7 13.3 5.4 Count 23 24 24 24 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error Ozone O3_Auto ZERO 18-Apr-2026 22:50:00 23:20:00 0 0.0 0.00 PREC 18-Apr-2026 22:50:00 23:50:00 0.07 0.07 .26% Date Printed: 4/19/2026 01:30 Daily Summary Report Site: Hattie Avenue (A) 4/18/2026 Interval: 001h Ozone NO NO2 NOx SO2 Time ppm ppb ppb ppb ppb 00:00 .006 1.4 23.1 24.6 .2 01:00 .006 1.1 19.8 20.9 .1 02:00 .007 .7 13.8 14.5 .1 03:00 .010 .5 10.4 11.0 .1 04:00 .008 .9 12.7 13.6 .0 05:00 .006 1.1 12.0 13.2 .0 06:00 .006 3.2 9.9 13.2 .1 07:00 .019 2.4 7.9 10.3 .2 08:00 .039 1.1 5.0 6.1 .3 09:00 .057 .8 5.7 6.5 .4 10:00 .067 .4 4.0 4.5 .5 11:00 .068 .2 3.0 3.2 .4 12:00 .065 .2 2.6 2.8 .1 13:00 .068 .1 2.6 2.8 .2 14:00 .071 .1 2.8 2.9 .2 15:00 .066 .1 C 2.8 C 3.0 C .1 16:00 .066 C C C .2 17:00 .065 .1 C 2.9 C 3.0 C .1 18:00 .061 .0 4.0 4.1 .1 19:00 .057 .0 5.1 5.1 .1 C 20:00 .053 .0 5.8 5.9 C 21:00 .050 .0 5.2 5.2 .1 C 22:00 .049 C .0 3.8 3.9 .2 23:00 C .1 3.5 3.6 .3 Average .042 .6 7.3 7.9 .1 Max .071 3.2 23.1 24.6 .5 Max Hour 14:00 06:00 00:00 00:00 10:00 Min .006 .0 2.6 2.8 .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 18-Apr-2026 15:46:00 16:11:00 67 70 -4.19% GPT-PS 18-Apr-2026 15:46:00 16:18:00 0.4 0.0 .46 GPTZ 18-Apr-2026 15:46:00 16:38:00 217 225 -3.55% GPT-PREC 18-Apr-2026 15:46:00 17:08:00 151.6 155 -2.18% NO2 GPT-PREC 18-Apr-2026 15:46:00 17:08:00 66.6 70 -4.84% NO2 Precision NO2_Diff PRECDIFF 18-Apr-2026 17:15:00 17:15:05 65.3 66.611 -1.83% NOx NOx_Auto NO-PREC 18-Apr-2026 15:46:00 16:11:00 67.3 70 -3.81% Ozone O3_Auto ZERO 18-Apr-2026 22:50:00 23:20:00 0 0.0 0.00 PREC 18-Apr-2026 22:50:00 23:50:00 0.066 0.07 -4.37% SO2 SO2_Auto ZERO 18-Apr-2026 19:46:00 20:11:00 0 0.0 .02 SPAN 18-Apr-2026 19:46:00 20:36:00 85.6 90 -4.83% PREC 18-Apr-2026 19:46:00 21:01:00 37.9 40 -5.2% Date Printed: 4/19/2026 01:30 Daily Summary Report Site: Hattie Avenue (B) 4/18/2026 Interval: 001h PM2.5 PM10 STP PM Coarse Time ug/m3 ug/m3 ug/m3 00:00 13.3 24.0 10.5 01:00 11.9 21.2 9.1 02:00 10.9 19.1 8.1 03:00 10.8 17.8 7.0 04:00 12.4 20.3 8.0 05:00 12.2 20.3 8.2 06:00 15.4 23.6 8.1 07:00 12.6 21.6 8.8 08:00 10.7 21.9 10.7 09:00 9.5 23.0 12.5 10:00 8.6 21.8 12.2 11:00 8.5 22.6 12.9 12:00 7.4 21.6 13.0 13:00 7.0 19.8 11.5 14:00 7.0 19.7 11.5 15:00 6.6 17.9 10.2 16:00 5.8 15.2 8.5 17:00 6.3 18.2 11.0 18:00 7.1 18.4 10.4 19:00 8.4 22.0 12.7 20:00 9.1 19.6 9.7 21:00 9.7 20.2 9.8 22:00 10.2 19.9 9.0 23:00 11.1 21.7 9.9 Average 9.6 20.4 10.1 Max 15.4 24.0 13.0 Max Hour 06:00 00:00 12:00 Min 5.8 15.2 7.0 Count 24 24 24 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error 0.0 -5.2% Date Printed: 4/19/2026 01:30 Daily Summary Report Site: Union Cross 4/18/2026 Interval: 001h Ozone Barometric Pres. Temperature (°F) Dew Point (°F) Time ppm mmHg DegF DegF 00:00 .021 735.4 63.1 52.8 01:00 .022 735.2 62.1 52.4 02:00 .021 735.1 61.7 51.8 03:00 .024 735.0 60.7 51.7 04:00 .029 734.8 60.0 51.2 05:00 .021 735.0 59.2 51.2 06:00 .011 735.4 60.3 52.5 07:00 .014 735.5 62.8 54.3 08:00 .038 735.4 70.5 56.6 09:00 .058 735.5 76.7 57.6 10:00 .068 735.5 80.7 58.4 11:00 .070 735.1 83.3 59.2 12:00 .067 734.6 84.7 60.4 13:00 .070 734.1 86.0 61.1 14:00 .073 733.6 86.8 61.7 15:00 .072 733.0 86.6 61.2 16:00 .067 732.7 86.5 60.8 17:00 .067 732.5 84.8 59.5 18:00 .065 732.4 82.1 58.8 19:00 .060 732.3 79.1 57.6 20:00 .056 732.5 76.4 57.0 21:00 .052 732.6 75.2 56.8 22:00 .051 C 732.5 74.7 57.3 23:00 C 732.5 74.0 57.7 Average .047 734.0 74.0 56.6 Max .073 735.5 86.8 61.7 Max Hour 14:00 10:00 14:00 14:00 Min .011 732.3 59.2 51.2 Count 23 24 24 24 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error Ozone O3_Auto ZERO 18-Apr-2026 22:50:00 23:20:00 0 0.0 0.00 PREC 18-Apr-2026 22:50:00 23:50:00 0.069 0.07 -.22% 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