Date Printed: 3/26/2026 01:30 Daily Summary Report Site: Clemmons Middle 3/25/2026 Interval: 001h Ozone PM2.5 PM10 LC PM Coarse Time ppm ug/m3 ug/m3 ug/m3 00:00 .021 B 5.2 12.0 6.7 01:00 .020 6.6 14.2 7.5 02:00 .014 7.0 13.4 6.3 03:00 .009 7.6 14.7 7.1 04:00 .009 7.9 13.6 5.7 05:00 .004 7.7 15.1 7.3 06:00 .002 9.6 27.0 17.4 07:00 .009 10.6 23.9 13.4 08:00 .027 B 10.5 19.5 8.9 09:00 .039 8.9 18.5 9.5 10:00 .045 8.5 17.7 9.2 11:00 .049 7.9 17.0 9.1 12:00 .051 7.0 15.2 8.2 13:00 .054 6.0 15.3 9.3 14:00 .056 5.0 13.9 8.8 15:00 .056 5.6 17.1 11.4 16:00 .057 B 8.0 20.9 12.9 17:00 .055 6.3 16.4 10.0 18:00 .052 5.9 27.1 21.1 19:00 .051 9.7 50.4 40.7 20:00 .050 12.5 28.2 15.6 21:00 .045 9.7 21.1 11.3 22:00 .043 C 8.1 18.6 10.5 23:00 C 7.8 18.6 10.8 Average .035 7.9 19.5 11.6 Max .057 12.5 50.4 40.7 Max Hour 16:00 20:00 19:00 19:00 Min .002 5.0 12.0 5.7 Count 23 24 24 24 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error Ozone O3_Auto ZERO 25-Mar-2026 22:50:00 23:20:00 0 0.0 0.00 PREC 25-Mar-2026 22:50:00 23:50:00 0.069 0.069 .05% Date Printed: 3/26/2026 01:30 Daily Summary Report Site: Hattie Avenue (A) 3/25/2026 Interval: 001h Ozone NO NO2 NOx SO2 Time ppm ppb ppb ppb ppb 00:00 .024 .2 9.3 9.6 .0 01:00 .025 .1 8.3 8.5 .0 02:00 .025 .2 8.0 8.3 .0 03:00 .024 .4 7.2 7.6 .0 04:00 .023 .3 7.6 7.9 .0 05:00 .025 .1 7.4 7.6 .0 06:00 .011 9.9 16.1 26.1 .0 07:00 D 9.9 15.1 25.0 .2 08:00 D 1.9 6.7 8.7 .0 09:00 .036 D 1.7 5.5 7.3 .0 10:00 .040 .9 3.5 4.5 .0 11:00 .042 .9 3.6 4.6 .0 12:00 .046 .6 3.2 3.9 .0 13:00 .047 .7 3.5 4.3 .1 D 14:00 .051 .4 2.9 3.3 D 15:00 .051 .2 C 2.6 C 2.9 C .1 D 16:00 .051 C C C .3 17:00 .050 .2 C 4.3 C 4.5 C .6 18:00 .043 .4 8.0 8.5 .3 19:00 .043 .6 8.7 9.3 1.3 C 20:00 .044 .2 6.0 6.3 C 21:00 .039 .2 8.7 8.9 .2 C 22:00 .033 C .2 10.6 10.9 .4 23:00 C .2 6.0 6.2 .3 Average .036 1.3 7.0 8.4 .1 Max .051 9.9 16.1 26.1 1.3 Max Hour 16:00 07:00 06:00 06:00 19:00 Min .011 .1 2.6 2.9 .0 Count 21 23 23 23 22 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error NO NOx_Auto NO-PREC 25-Mar-2026 15:46:00 16:11:00 67.3 70 -3.75% GPT-PS 25-Mar-2026 15:46:00 16:18:00 0.4 0.0 .46 GPTZ 25-Mar-2026 15:46:00 16:38:00 216.9 225 -3.57% GPT-PREC 25-Mar-2026 15:46:00 17:08:00 151.5 155 -2.23% NO2 GPT-PREC 25-Mar-2026 15:46:00 17:08:00 65.6 70 -6.14% NO2 Precision NO2_Diff PRECDIFF 25-Mar-2026 17:15:00 17:15:05 65.4 65.7 -.44% NOx NOx_Auto NO-PREC 25-Mar-2026 15:46:00 16:11:00 67.3 70 -3.83% Ozone O3_Auto ZERO 25-Mar-2026 22:50:00 23:20:00 0 0.0 0.00 PREC 25-Mar-2026 22:50:00 23:50:00 0.062 0.07 -11.24% SO2 SO2_Auto ZERO 25-Mar-2026 19:46:00 20:11:00 -0.1 0.0 -.1 SPAN 25-Mar-2026 19:46:00 20:36:00 86.2 90 -4.13% PREC 25-Mar-2026 19:46:00 21:01:00 38 40 -4.95% Date Printed: 3/26/2026 01:30 Daily Summary Report Site: Hattie Avenue (B) 3/25/2026 Interval: 001h PM2.5 PM10 STP PM Coarse Time ug/m3 ug/m3 ug/m3 00:00 17.9 24.5 7.8 01:00 18.1 24.4 7.5 02:00 14.8 21.8 8.1 03:00 13.2 20.6 8.4 04:00 14.0 19.6 6.6 05:00 12.6 18.9 7.3 06:00 13.6 20.8 8.4 07:00 11.3 19.1 8.6 08:00 7.4 16.2 9.4 09:00 16.2 24.6 9.0 10:00 10.9 20.9 10.4 11:00 8.6 18.5 10.1 12:00 7.2 17.1 9.9 13:00 6.0 17.2 11.2 14:00 5.2 16.4 11.2 15:00 5.1 14.2 9.0 16:00 7.1 17.7 10.6 17:00 8.1 18.7 10.6 18:00 6.7 19.6 12.9 19:00 46.9 68.7 22.3 20:00 20.0 33.7 14.2 21:00 13.2 27.4 14.6 22:00 11.3 21.5 10.5 23:00 8.3 17.9 9.8 Average 12.6 22.5 10.3 Max 46.9 68.7 22.3 Max Hour 19:00 19:00 19:00 Min 5.1 14.2 6.6 Count 24 24 24 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error 0.0 -4.95% Date Printed: 3/26/2026 01:30 Daily Summary Report Site: Union Cross 3/25/2026 Interval: 001h Ozone Barometric Pres. Temperature (°F) Dew Point (°F) Time ppm mmHg DegF DegF 00:00 .023 744.7 41.4 24.2 01:00 .032 744.2 40.7 24.3 02:00 .030 743.8 39.7 24.5 03:00 .026 743.6 39.2 25.0 04:00 .029 743.5 38.8 25.8 05:00 .026 743.9 36.7 25.9 06:00 .017 744.3 34.9 26.6 07:00 .010 D 744.6 38.8 27.9 08:00 D 744.8 45.2 29.1 09:00 D 744.8 48.9 29.8 10:00 .043 744.6 51.2 30.5 11:00 .046 744.4 54.0 31.3 12:00 .050 743.7 56.5 32.1 13:00 .052 742.4 59.1 33.6 14:00 .053 741.7 60.9 35.0 15:00 .054 741.1 62.0 35.6 16:00 .057 740.7 61.9 35.2 17:00 .054 740.7 61.0 35.1 18:00 .050 740.7 59.0 34.8 19:00 .049 740.6 56.9 34.1 20:00 .042 740.6 55.5 33.5 21:00 .045 740.5 55.2 34.5 22:00 .045 C 740.3 55.0 36.5 23:00 C 740.2 55.0 38.9 Average .039 742.6 50.3 30.9 Max .057 744.8 62.0 38.9 Max Hour 16:00 09:00 15:00 23:00 Min .010 740.2 34.9 24.2 Count 21 24 24 24 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error Ozone O3_Auto ZERO 25-Mar-2026 22:50:00 23:20:00 0 0.0 0.00 PREC 25-Mar-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