Date Printed: 4/21/2026 01:30 Daily Summary Report Site: Clemmons Middle 4/20/2026 Interval: 001h Ozone PM2.5 PM10 LC PM Coarse Time ppm ug/m3 ug/m3 ug/m3 00:00 .026 3.1 7.3 4.2 01:00 .022 B 3.0 6.8 3.7 02:00 .018 3.1 7.4 4.3 03:00 .013 3.2 7.7 4.4 04:00 .012 3.3 7.8 4.5 05:00 .009 3.4 8.2 4.7 06:00 .010 7.1 61.9 54.8 07:00 .017 6.4 50.6 44.1 08:00 .031 4.1 18.0 13.9 09:00 .046 3.8 16.2 12.3 10:00 .051 3.5 10.7 7.1 11:00 .051 3.7 9.5 5.8 12:00 .050 4.4 13.8 9.4 13:00 .051 4.8 13.3 8.4 14:00 .051 4.6 12.8 8.1 15:00 .054 4.2 13.7 9.4 16:00 .054 4.0 12.7 8.7 17:00 .053 B 3.8 11.0 7.2 18:00 .052 B 3.6 11.0 7.4 19:00 .052 3.4 10.0 6.5 20:00 .053 3.2 8.7 5.4 21:00 .047 3.1 7.4 4.2 22:00 .048 C 3.2 7.8 4.6 23:00 C 3.4 7.7 4.2 Average .037 3.8 14.2 10.3 Max .054 7.1 61.9 54.8 Max Hour 16:00 06:00 06:00 06:00 Min .009 3.0 6.8 3.7 Count 23 24 24 24 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error Ozone O3_Auto ZERO 20-Apr-2026 22:50:00 23:20:00 0 0.0 0.00 PREC 20-Apr-2026 22:50:00 23:50:00 0.069 0.07 -.96% Date Printed: 4/21/2026 01:30 Daily Summary Report Site: Hattie Avenue (A) 4/20/2026 Interval: 001h Ozone NO NO2 NOx SO2 Time ppm ppb ppb ppb ppb 00:00 .025 .1 8.3 8.5 .0 01:00 .019 .1 7.1 7.3 .0 02:00 .013 .2 10.2 10.5 .0 03:00 .014 .3 6.9 7.3 .0 04:00 .016 .3 7.9 8.2 .0 05:00 .019 .3 7.0 7.3 .0 06:00 .018 1.7 11.5 13.3 .0 07:00 .025 2.7 10.1 12.8 .0 08:00 .035 1.5 5.4 7.0 .0 09:00 .043 .7 3.1 3.9 .0 10:00 .049 .4 2.1 2.5 .0 11:00 .050 .2 1.9 2.1 .0 12:00 .049 .2 1.9 2.2 .0 13:00 .050 .2 1.5 1.7 .0 14:00 .050 .6 2.3 2.9 .0 15:00 .052 .5 C 2.6 C 3.1 C .0 16:00 .052 C C C .0 17:00 .053 .3 C 3.1 C 3.4 C .0 18:00 .054 .1 3.6 3.8 .0 19:00 .054 .0 2.6 2.7 .0 C 20:00 .052 .1 2.9 3.1 C 21:00 .052 .0 2.1 2.2 .0 C 22:00 .050 C .0 2.5 2.6 .0 23:00 C .0 2.5 2.5 .1 Average .038 .4 4.7 5.2 .0 Max .054 2.7 11.5 13.3 .1 Max Hour 19:00 07:00 06:00 06:00 23:00 Min .013 .0 1.5 1.7 .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 20-Apr-2026 15:46:00 16:11:00 66.7 70 -4.61% GPT-PS 20-Apr-2026 15:46:00 16:18:00 0.5 0.0 .58 GPTZ 20-Apr-2026 15:46:00 16:38:00 215.8 225 -4.09% GPT-PREC 20-Apr-2026 15:46:00 17:08:00 151.2 155 -2.41% NO2 GPT-PREC 20-Apr-2026 15:46:00 17:08:00 65.6 70 -6.26% NO2 Precision NO2_Diff PRECDIFF 20-Apr-2026 17:15:00 17:15:05 64.5 65.618 -1.63% NOx NOx_Auto NO-PREC 20-Apr-2026 15:46:00 16:11:00 66.6 70 -4.75% Ozone O3_Auto ZERO 20-Apr-2026 22:50:00 23:20:00 0 0.0 0.00 PREC 20-Apr-2026 22:50:00 23:50:00 0.067 0.07 -3.65% SO2 SO2_Auto ZERO 20-Apr-2026 19:46:00 20:11:00 0 0.0 -.06 SPAN 20-Apr-2026 19:46:00 20:36:00 85.2 90 -5.25% PREC 20-Apr-2026 19:46:00 21:01:00 37.6 40 -5.88% Date Printed: 4/21/2026 01:30 Daily Summary Report Site: Hattie Avenue (B) 4/20/2026 Interval: 001h PM2.5 PM10 STP PM Coarse Time ug/m3 ug/m3 ug/m3 00:00 4.1 9.7 6.0 01:00 4.2 9.9 6.1 02:00 4.7 9.3 5.0 03:00 4.4 9.2 5.2 04:00 4.1 9.0 5.2 05:00 3.9 8.5 5.0 06:00 4.0 11.0 7.4 07:00 4.3 12.6 8.6 08:00 4.1 13.8 9.8 09:00 3.5 10.3 6.7 10:00 3.7 15.0 11.2 11:00 3.9 12.8 8.8 12:00 4.4 15.7 11.1 13:00 4.7 17.1 12.1 14:00 4.9 18.6 13.3 15:00 4.7 22.1 17.0 16:00 4.4 17.8 13.0 17:00 4.0 13.1 9.0 18:00 3.9 14.5 10.6 19:00 3.4 8.3 5.0 20:00 3.4 8.0 4.7 21:00 3.3 8.9 5.7 22:00 3.3 7.7 4.6 23:00 3.4 8.5 5.3 Average 4.0 12.1 8.1 Max 4.9 22.1 17.0 Max Hour 14:00 15:00 15:00 Min 3.3 7.7 4.6 Count 24 24 24 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error 0.0 -5.88% Date Printed: 4/21/2026 01:30 Daily Summary Report Site: Union Cross 4/20/2026 Interval: 001h Ozone Barometric Pres. Temperature (°F) Dew Point (°F) Time ppm mmHg DegF DegF 00:00 .032 740.9 42.6 26.4 01:00 .026 740.7 41.0 27.2 02:00 .018 740.7 38.7 29.2 03:00 .018 740.7 38.2 29.2 04:00 .017 740.7 39.6 27.9 05:00 .022 740.8 38.8 27.6 06:00 .019 741.2 41.9 28.1 07:00 .026 741.7 46.0 31.0 08:00 .033 741.6 51.7 33.6 09:00 .043 741.4 58.1 35.9 10:00 .051 741.2 61.3 36.7 11:00 .051 741.0 61.9 37.5 12:00 .052 740.4 63.6 39.1 13:00 .051 740.0 65.3 40.5 14:00 .052 739.6 66.2 40.8 15:00 .055 739.3 67.0 40.3 16:00 .054 739.5 66.6 40.6 17:00 .054 739.8 65.5 39.7 18:00 .056 740.2 63.5 37.2 19:00 .054 740.7 60.5 35.0 20:00 .053 741.5 57.7 31.8 21:00 .048 742.2 55.2 29.5 22:00 .051 C 742.6 52.9 27.4 23:00 C 742.8 50.6 25.8 Average .040 740.8 53.9 33.2 Max .056 742.8 67.0 40.8 Max Hour 18:00 23:00 15:00 14:00 Min .017 739.3 38.2 25.8 Count 23 24 24 24 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error Ozone O3_Auto ZERO 20-Apr-2026 22:50:00 23:20:00 0 0.0 0.00 PREC 20-Apr-2026 22:50:00 23:50:00 0.07 0.07 .74% 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