Date Printed: 4/17/2026 01:30 Daily Summary Report Site: Clemmons Middle 4/16/2026 Interval: 001h Ozone PM2.5 PM10 LC PM Coarse Time ppm ug/m3 ug/m3 ug/m3 00:00 .043 8.6 19.1 10.5 01:00 .036 8.8 17.9 9.0 02:00 .034 10.0 20.4 10.3 03:00 .028 10.1 18.6 8.5 04:00 .027 10.4 18.1 7.7 05:00 .018 11.3 22.5 11.1 06:00 .010 14.2 63.8 49.6 07:00 .026 14.1 53.0 38.9 08:00 .040 B 12.4 24.0 11.5 09:00 .050 12.8 26.4 13.6 10:00 .058 12.7 26.1 13.3 11:00 .063 12.7 26.6 13.9 12:00 .062 12.1 24.1 12.0 13:00 .064 11.6 23.2 11.5 14:00 .069 11.4 24.3 12.9 15:00 .072 B 10.8 24.8 13.9 16:00 .072 9.3 23.3 14.0 17:00 .072 9.9 34.1 24.2 18:00 .070 9.3 23.9 14.5 19:00 .063 9.0 23.4 14.3 20:00 .057 8.8 19.7 10.9 21:00 .054 8.6 18.8 10.2 22:00 .052 C 8.2 18.8 10.5 23:00 C 8.3 18.5 10.1 Average .049 10.6 25.5 14.8 Max .072 14.2 63.8 49.6 Max Hour 17:00 06:00 06:00 06:00 Min .010 8.2 17.9 7.7 Count 23 24 24 24 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error Ozone O3_Auto ZERO 16-Apr-2026 22:50:00 23:20:00 0 0.0 0.00 PREC 16-Apr-2026 22:50:00 23:50:00 0.07 0.07 .4% Date Printed: 4/17/2026 01:30 Daily Summary Report Site: Hattie Avenue (A) 4/16/2026 Interval: 001h Ozone NO NO2 NOx SO2 Time ppm ppb ppb ppb ppb 00:00 .043 .1 5.6 5.7 .1 01:00 .025 .6 10.6 11.3 .1 02:00 .028 .2 8.7 8.9 .1 03:00 .037 .2 6.8 7.0 .2 04:00 .037 .1 6.6 6.8 .2 05:00 .031 .2 9.1 9.4 .2 06:00 .029 .6 10.7 11.3 .2 07:00 .030 2.5 10.6 13.2 .3 08:00 .039 1.9 8.4 10.3 .5 09:00 .050 1.1 6.8 8.0 .3 10:00 .058 .3 3.2 3.6 .2 11:00 .059 .2 2.5 2.7 .2 12:00 .060 .1 2.5 2.7 .2 13:00 .063 .1 2.4 2.6 .2 14:00 .067 .1 2.6 2.8 .3 15:00 .070 .1 C 2.8 C 2.9 C .3 16:00 .071 C C C .4 17:00 .071 .1 C 3.4 C 3.5 C .3 18:00 .069 .0 4.0 4.1 .2 19:00 .061 .0 5.9 6.0 .1 C 20:00 .055 .0 6.4 6.5 C 21:00 .050 .0 4.6 4.6 .1 C 22:00 .051 C .0 3.1 3.1 .1 23:00 C .0 4.0 4.1 .1 Average .050 .3 5.7 6.1 .2 Max .071 2.5 10.7 13.2 .5 Max Hour 17:00 07:00 06:00 07:00 08:00 Min .025 .0 2.4 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 16-Apr-2026 15:46:00 16:11:00 67.2 70 -3.86% GPT-PS 16-Apr-2026 15:46:00 16:18:00 0.4 0.0 .47 GPTZ 16-Apr-2026 15:46:00 16:38:00 217.1 225 -3.49% GPT-PREC 16-Apr-2026 15:46:00 17:08:00 152 155 -1.89% NO2 GPT-PREC 16-Apr-2026 15:46:00 17:08:00 65.8 70 -5.92% NO2 Precision NO2_Diff PRECDIFF 16-Apr-2026 17:15:00 17:15:05 65 65.853 -1.16% NOx NOx_Auto NO-PREC 16-Apr-2026 15:46:00 16:11:00 67.4 70 -3.7% Ozone O3_Auto ZERO 16-Apr-2026 22:50:00 23:20:00 0 0.0 0.00 PREC 16-Apr-2026 22:50:00 23:50:00 0.068 0.07 -2.86% SO2 SO2_Auto ZERO 16-Apr-2026 19:46:00 20:11:00 0 0.0 .01 SPAN 16-Apr-2026 19:46:00 20:36:00 85.7 90 -4.7% PREC 16-Apr-2026 19:46:00 21:01:00 37.8 40 -5.29% Date Printed: 4/17/2026 01:30 Daily Summary Report Site: Hattie Avenue (B) 4/16/2026 Interval: 001h PM2.5 PM10 STP PM Coarse Time ug/m3 ug/m3 ug/m3 00:00 9.3 20.0 10.3 01:00 10.9 22.4 11.3 02:00 10.9 20.5 9.4 03:00 10.9 22.2 11.1 04:00 11.6 21.6 9.8 05:00 12.4 21.0 8.4 06:00 13.1 23.4 10.1 07:00 13.8 37.1 22.7 08:00 16.3 62.0 44.4 09:00 12.8 31.3 17.4 10:00 12.6 29.8 16.0 11:00 11.8 26.3 13.3 12:00 12.3 28.2 14.5 13:00 12.1 28.9 15.3 14:00 11.4 31.6 18.4 15:00 11.4 31.6 18.5 16:00 10.1 28.4 16.8 17:00 9.8 26.6 15.5 18:00 9.7 28.6 17.6 19:00 9.8 25.9 15.1 20:00 9.5 27.5 17.0 21:00 9.3 24.2 14.1 22:00 8.8 21.0 11.6 23:00 8.7 21.4 12.2 Average 11.2 27.5 15.4 Max 16.3 62.0 44.4 Max Hour 08:00 08:00 08:00 Min 8.7 20.0 8.4 Count 24 24 24 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error 0.0 -5.29% Date Printed: 4/17/2026 01:30 Daily Summary Report Site: Union Cross 4/16/2026 Interval: 001h Ozone Barometric Pres. Temperature (°F) Dew Point (°F) Time ppm mmHg DegF DegF 00:00 .039 736.5 69.1 51.8 01:00 .037 736.3 68.1 52.0 02:00 .038 736.2 67.2 52.4 03:00 .038 736.2 66.4 52.8 04:00 .033 736.3 64.5 52.8 05:00 .030 736.6 63.3 52.7 06:00 .028 737.2 63.0 53.0 07:00 .031 737.4 64.6 54.3 08:00 .039 737.4 69.0 56.4 09:00 .052 737.4 73.3 57.5 10:00 .060 737.1 77.6 58.7 11:00 .063 736.6 80.1 59.6 12:00 .062 736.2 82.2 60.6 13:00 .065 735.5 83.2 60.7 14:00 .072 734.7 84.7 60.7 15:00 .076 734.1 85.5 60.3 16:00 .074 733.8 85.3 58.7 17:00 .075 733.5 84.2 58.8 18:00 .071 733.4 81.4 57.0 19:00 .061 733.5 77.9 55.1 20:00 .054 734.1 75.8 54.8 21:00 .054 734.4 75.2 54.1 22:00 .055 C 734.7 74.5 53.4 23:00 C 734.9 72.8 52.6 Average .052 735.5 74.5 55.8 Max .076 737.4 85.5 60.7 Max Hour 15:00 09:00 15:00 14:00 Min .028 733.4 63.0 51.8 Count 23 24 24 24 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error Ozone O3_Auto ZERO 16-Apr-2026 22:50:00 23:20:00 0 0.0 0.00 PREC 16-Apr-2026 22:50:00 23:50:00 0.07 0.07 .98% 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