Date Printed: 5/1/2026 01:30 Daily Summary Report Site: Clemmons Middle 4/30/2026 Interval: 001h Ozone PM2.5 PM10 LC PM Coarse Time ppm ug/m3 ug/m3 ug/m3 00:00 .024 5.2 12.4 7.2 01:00 .031 4.6 11.5 6.8 02:00 .037 4.2 11.7 7.5 03:00 .034 3.8 9.7 5.9 04:00 .027 4.0 11.2 7.1 05:00 .018 4.3 12.1 7.8 06:00 .022 3.9 11.0 7.0 07:00 .013 B 3.9 12.0 8.1 08:00 .014 4.1 12.3 8.2 09:00 .033 B 4.2 11.9 7.6 10:00 .043 4.3 13.0 8.7 11:00 .045 4.8 12.3 7.5 12:00 .048 4.7 12.6 7.8 13:00 .051 3.8 10.6 6.7 14:00 .051 3.3 10.0 6.6 15:00 .052 3.3 10.1 6.8 16:00 .054 2.9 9.3 6.3 17:00 .054 2.6 8.4 5.8 18:00 .050 2.6 7.8 5.2 19:00 .049 2.7 9.3 6.6 20:00 .047 2.7 7.9 5.1 21:00 .044 2.8 7.7 4.8 22:00 .040 C 2.9 8.0 5.1 23:00 C 3.0 8.3 5.3 Average .038 3.6 10.4 6.7 Max .054 5.2 13.0 8.7 Max Hour 17:00 00:00 10:00 10:00 Min .013 2.6 7.7 4.8 Count 23 24 24 24 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error Ozone O3_Auto ZERO 30-Apr-2026 22:50:00 23:20:00 0.001 0.0 0.00 PREC 30-Apr-2026 22:50:00 23:50:00 0.071 0.07 2.15% Date Printed: 5/1/2026 01:30 Daily Summary Report Site: Hattie Avenue (A) 4/30/2026 Interval: 001h Ozone NO NO2 NOx SO2 Time ppm ppb ppb ppb ppb 00:00 .024 .2 8.2 8.4 .1 01:00 .036 .1 2.1 2.3 .1 02:00 .041 .1 1.2 1.3 .1 03:00 .040 .0 2.0 2.1 .0 04:00 .033 .1 4.5 4.6 .1 05:00 .017 .3 11.2 11.5 .0 06:00 .016 1.4 17.4 18.9 .1 07:00 .024 .8 11.5 12.3 .1 08:00 .018 2.6 13.9 16.5 .1 09:00 .032 2.1 7.2 9.4 .2 10:00 .042 .5 2.1 2.7 .1 11:00 .044 .3 1.7 2.1 D 12:00 .046 .3 1.5 1.8 D 13:00 .047 .2 1.6 1.9 D 14:00 .047 .3 2.0 2.4 .1 D 15:00 .050 .3 C 1.8 C 2.1 C .1 16:00 .052 C C C .1 17:00 .051 .2 C 2.6 C 2.8 C .1 18:00 .049 .1 2.9 3.0 .1 19:00 .047 .0 3.0 3.1 .0 C 20:00 .043 .1 4.1 4.2 C 21:00 .041 .1 3.7 3.8 .1 C 22:00 .039 C .1 3.7 3.8 .0 23:00 C .0 1.8 1.9 .0 Average .038 .4 4.8 5.3 .0 Max .052 2.6 17.4 18.9 .2 Max Hour 16:00 08:00 06:00 06:00 09:00 Min .016 .0 1.2 1.3 .0 Count 23 23 23 23 20 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error NO NOx_Auto NO-PREC 30-Apr-2026 15:46:00 16:11:00 67.1 70 -4.12% GPT-PS 30-Apr-2026 15:46:00 16:18:00 0.5 0.0 .59 GPTZ 30-Apr-2026 15:46:00 16:38:00 217 225 -3.55% GPT-PREC 30-Apr-2026 15:46:00 17:08:00 151.2 155 -2.41% NO2 GPT-PREC 30-Apr-2026 15:46:00 17:08:00 66.1 70 -5.43% NO2 Precision NO2_Diff PRECDIFF 30-Apr-2026 17:15:00 17:15:05 65.7 66.199 -.69% NOx NOx_Auto NO-PREC 30-Apr-2026 15:46:00 16:11:00 67.1 70 -4.09% Ozone O3_Auto ZERO 30-Apr-2026 22:50:00 23:20:00 0 0.0 0.00 PREC 30-Apr-2026 22:50:00 23:50:00 0.067 0.07 -3.43% SO2 SO2_Auto ZERO 30-Apr-2026 19:46:00 20:11:00 0 0.0 .03 SPAN 30-Apr-2026 19:46:00 20:36:00 85.1 90 -5.4% PREC 30-Apr-2026 19:46:00 21:01:00 37.6 40 -5.85% Date Printed: 5/1/2026 01:30 Daily Summary Report Site: Hattie Avenue (B) 4/30/2026 Interval: 001h PM2.5 PM10 STP PM Coarse Time ug/m3 ug/m3 ug/m3 00:00 5.9 14.2 8.2 01:00 4.2 13.3 8.9 02:00 3.7 11.8 8.0 03:00 3.6 8.2 4.6 04:00 3.9 11.9 8.0 05:00 4.2 10.1 5.9 06:00 5.2 15.3 10.1 07:00 4.1 12.0 7.9 08:00 8.4 38.0 29.5 09:00 4.8 16.9 11.9 10:00 4.5 13.2 8.4 11:00 4.6 14.8 9.8 12:00 4.4 13.3 8.4 13:00 4.1 12.9 8.3 14:00 3.7 11.2 7.1 15:00 3.2 13.6 9.9 16:00 3.0 12.3 8.9 17:00 2.9 10.4 7.1 18:00 3.0 9.9 6.7 19:00 2.7 8.2 5.3 20:00 2.8 7.9 5.0 21:00 2.9 9.0 6.0 22:00 3.2 9.2 6.0 23:00 3.2 9.3 6.2 Average 4.0 12.7 8.5 Max 8.4 38.0 29.5 Max Hour 08:00 08:00 08:00 Min 2.7 7.9 4.6 Count 24 24 24 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error 0.0 -5.85% Date Printed: 5/1/2026 01:30 Daily Summary Report Site: Union Cross 4/30/2026 Interval: 001h Ozone Barometric Pres. Temperature (°F) Dew Point (°F) Time ppm mmHg DegF DegF 00:00 .029 731.5 62.8 54.7 01:00 .035 731.0 62.1 52.1 02:00 .040 730.8 60.7 48.1 03:00 .035 731.3 58.6 46.9 04:00 .025 731.5 55.9 47.2 05:00 .012 731.4 54.1 48.5 06:00 .014 731.9 55.7 47.2 07:00 .014 732.6 56.8 47.8 08:00 .013 732.8 57.3 49.8 09:00 .023 732.6 59.6 49.2 10:00 .042 732.4 63.9 47.7 11:00 .044 731.9 65.9 48.4 12:00 .047 731.5 67.8 48.5 13:00 .049 731.4 69.7 48.3 14:00 .051 731.3 71.2 48.0 15:00 .051 731.0 71.0 46.9 16:00 .054 731.1 71.4 45.4 17:00 .054 731.5 70.4 44.0 18:00 .051 731.8 68.0 42.6 19:00 .047 732.5 64.5 39.9 20:00 .044 733.2 61.0 38.7 21:00 .037 733.9 58.2 37.6 22:00 .038 C 734.1 55.9 36.6 23:00 C 734.5 54.2 36.2 Average .036 732.0 62.3 45.8 Max .054 734.5 71.4 54.7 Max Hour 17:00 23:00 16:00 00:00 Min .012 730.8 54.1 36.2 Count 23 24 24 24 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error Ozone O3_Auto ZERO 30-Apr-2026 22:50:00 23:20:00 0 0.0 0.00 PREC 30-Apr-2026 22:50:00 23:50:00 0.07 0.07 .21% 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