Date Printed: 4/20/2026 01:30 Daily Summary Report Site: Clemmons Middle 4/19/2026 Interval: 001h Ozone PM2.5 PM10 LC PM Coarse Time ppm ug/m3 ug/m3 ug/m3 00:00 .043 10.9 18.6 7.6 01:00 .039 11.2 19.4 8.1 02:00 .034 10.1 17.5 7.3 03:00 .031 10.3 17.3 7.0 04:00 .026 10.2 16.5 6.2 05:00 .031 6.6 21.2 14.5 06:00 .046 1.6 19.4 17.7 07:00 .044 .9 8.7 7.7 08:00 .042 .7 3.6 2.8 09:00 .046 B 2.0 7.0 4.9 10:00 .044 3.2 8.5 5.3 11:00 .045 3.8 8.9 5.0 12:00 .048 3.8 8.9 5.0 13:00 .051 3.4 9.9 6.5 14:00 .052 2.9 7.7 4.8 15:00 .053 2.8 7.9 5.0 16:00 .053 2.8 8.1 5.2 17:00 .053 2.8 7.9 5.0 18:00 .050 2.8 7.7 4.9 19:00 .045 2.9 7.7 4.7 20:00 .043 2.9 7.8 4.9 21:00 .040 2.9 8.0 5.0 22:00 .036 C 3.1 7.9 4.8 23:00 C 3.1 6.9 3.8 Average .043 4.4 10.9 6.4 Max .053 11.2 21.2 17.7 Max Hour 17:00 01:00 05:00 06:00 Min .026 .7 3.6 2.8 Count 23 24 24 24 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error Ozone O3_Auto ZERO 19-Apr-2026 22:50:00 23:20:00 0 0.0 0.00 PREC 19-Apr-2026 22:50:00 23:50:00 0.069 0.07 -.15% Date Printed: 4/20/2026 01:30 Daily Summary Report Site: Hattie Avenue (A) 4/19/2026 Interval: 001h Ozone NO NO2 NOx SO2 Time ppm ppb ppb ppb ppb 00:00 .043 .1 3.2 3.3 .2 01:00 .040 .1 3.9 4.0 .3 02:00 .038 .1 4.8 5.0 .2 03:00 .038 .1 3.2 3.4 .1 04:00 .032 .2 4.8 5.0 .1 05:00 .038 .0 1.6 1.7 .0 06:00 .043 .0 1.3 1.4 .0 07:00 .045 .0 1.1 1.2 .0 08:00 .045 .1 1.4 1.6 .0 09:00 .044 .1 1.3 1.4 .0 10:00 .044 .2 1.2 1.5 .0 11:00 .044 .3 1.5 1.9 .0 12:00 .047 .2 1.4 1.7 .0 13:00 .047 .2 1.3 1.6 .0 14:00 .050 .1 1.1 1.2 .0 15:00 .050 .1 C 1.4 C 1.6 C .0 16:00 .050 C C C .1 17:00 .050 .1 C 1.4 C 1.6 C .0 18:00 .049 .0 1.9 2.0 .1 19:00 .043 .0 4.9 5.0 .1 C 20:00 .040 .1 6.3 6.4 C 21:00 .042 .1 3.2 3.3 .0 C 22:00 .040 C .0 4.9 5.0 .0 23:00 C .1 8.3 8.5 .0 Average .043 .1 2.8 3.0 .0 Max .050 .3 8.3 8.5 .3 Max Hour 17:00 11:00 23:00 23:00 01:00 Min .032 .0 1.1 1.2 .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 19-Apr-2026 15:46:00 16:11:00 67.1 70 -4.13% GPT-PS 19-Apr-2026 15:46:00 16:18:00 0.5 0.0 .58 GPTZ 19-Apr-2026 15:46:00 16:38:00 216.1 225 -3.95% GPT-PREC 19-Apr-2026 15:46:00 17:08:00 151.3 155 -2.33% NO2 GPT-PREC 19-Apr-2026 15:46:00 17:08:00 65.8 70 -5.89% NO2 Precision NO2_Diff PRECDIFF 19-Apr-2026 17:15:00 17:15:05 64.7 65.88 -1.74% NOx NOx_Auto NO-PREC 19-Apr-2026 15:46:00 16:11:00 67.1 70 -4.1% Ozone O3_Auto ZERO 19-Apr-2026 22:50:00 23:20:00 0 0.0 0.00 PREC 19-Apr-2026 22:50:00 23:50:00 0.067 0.07 -3.78% SO2 SO2_Auto ZERO 19-Apr-2026 19:46:00 20:11:00 0 0.0 -.01 SPAN 19-Apr-2026 19:46:00 20:36:00 85.4 90 -5.06% PREC 19-Apr-2026 19:46:00 21:01:00 37.6 40 -5.93% Date Printed: 4/20/2026 01:30 Daily Summary Report Site: Hattie Avenue (B) 4/19/2026 Interval: 001h PM2.5 PM10 STP PM Coarse Time ug/m3 ug/m3 ug/m3 00:00 11.5 19.2 7.2 01:00 11.8 21.6 9.2 02:00 11.7 20.3 8.0 03:00 10.3 18.6 7.9 04:00 8.7 15.8 6.8 05:00 4.1 31.9 27.4 06:00 2.9 35.2 32.4 07:00 1.7 18.8 17.3 08:00 1.2 6.5 5.4 09:00 1.8 8.3 6.5 10:00 3.2 10.8 7.6 11:00 4.0 12.3 8.2 12:00 3.8 10.9 7.0 13:00 3.5 10.0 6.4 14:00 3.0 11.9 8.6 15:00 3.2 9.4 6.1 16:00 3.1 9.1 5.9 17:00 3.0 9.6 6.5 18:00 2.9 7.5 4.5 19:00 3.8 11.4 7.7 20:00 4.7 13.9 9.5 21:00 3.4 10.4 7.2 22:00 3.6 9.2 5.8 23:00 4.2 11.2 7.4 Average 4.7 14.3 9.4 Max 11.8 35.2 32.4 Max Hour 01:00 06:00 06:00 Min 1.2 6.5 4.5 Count 24 24 24 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error 0.0 -5.93% Date Printed: 4/20/2026 01:30 Daily Summary Report Site: Union Cross 4/19/2026 Interval: 001h Ozone Barometric Pres. Temperature (°F) Dew Point (°F) Time ppm mmHg DegF DegF 00:00 .047 732.1 73.1 57.7 01:00 .045 731.6 71.8 57.6 02:00 .039 731.4 69.7 57.3 03:00 .035 731.1 67.9 57.0 04:00 .034 731.5 66.6 57.0 05:00 .040 732.5 66.1 53.6 06:00 .044 734.5 57.6 42.3 07:00 .047 735.8 52.2 39.3 08:00 .047 736.5 50.6 38.2 09:00 .046 736.9 51.7 36.5 10:00 .046 737.1 52.7 33.7 11:00 .045 737.2 54.7 34.2 12:00 .049 737.1 57.3 34.3 13:00 .049 737.1 59.0 35.0 14:00 .051 736.9 61.3 34.9 15:00 .052 736.7 61.2 33.9 16:00 .052 736.9 60.8 33.7 17:00 .052 737.3 60.7 33.2 18:00 .051 737.7 59.4 32.3 19:00 .048 738.6 56.3 30.9 20:00 .047 739.5 54.3 29.5 21:00 .043 740.1 51.9 28.3 22:00 .038 C 740.5 48.8 27.4 23:00 C 740.7 44.2 26.5 Average .045 736.1 58.7 39.3 Max .052 740.7 73.1 57.7 Max Hour 17:00 23:00 00:00 00:00 Min .034 731.1 44.2 26.5 Count 23 24 24 24 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error Ozone O3_Auto ZERO 19-Apr-2026 22:50:00 23:20:00 0 0.0 0.00 PREC 19-Apr-2026 22:50:00 23:50:00 0.069 0.07 -.34% 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