Date Printed: 5/4/2026 01:30 Daily Summary Report Site: Clemmons Middle 5/3/2026 Interval: 001h Ozone PM2.5 PM10 LC PM Coarse Time ppm ug/m3 ug/m3 ug/m3 00:00 .029 3.7 7.3 3.6 01:00 .026 B 3.7 7.4 3.6 02:00 .023 3.5 7.1 3.6 03:00 .017 3.6 7.3 3.6 04:00 .013 3.7 7.1 3.4 05:00 .011 3.7 7.0 3.3 06:00 .011 3.9 7.6 3.7 07:00 .030 B 4.3 8.4 4.1 08:00 .043 3.1 6.3 3.2 09:00 .046 2.9 6.3 3.3 10:00 .048 2.9 7.1 4.1 11:00 .051 2.6 6.6 3.9 12:00 .053 2.6 5.8 3.1 13:00 .053 2.7 5.9 3.2 14:00 .055 2.6 6.8 4.1 15:00 .055 2.6 7.6 5.0 16:00 .055 2.7 6.4 3.6 17:00 .055 B 2.9 8.7 5.7 18:00 .053 2.9 8.1 5.2 19:00 .049 3.1 7.0 3.9 20:00 .045 3.9 9.1 5.1 21:00 .043 4.0 9.1 5.1 22:00 .038 C 5.6 11.3 5.7 23:00 C 5.1 11.7 6.6 Average .039 3.4 7.6 4.1 Max .055 5.6 11.7 6.6 Max Hour 17:00 22:00 23:00 23:00 Min .011 2.6 5.8 3.1 Count 23 24 24 24 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error Ozone O3_Auto ZERO 03-May-2026 22:50:00 23:20:00 0.002 0.0 0.00 PREC 03-May-2026 22:50:00 23:50:00 0.072 0.07 3.35% Date Printed: 5/4/2026 01:30 Daily Summary Report Site: Hattie Avenue (A) 5/3/2026 Interval: 001h Ozone NO NO2 NOx SO2 Time ppm ppb ppb ppb ppb 00:00 .028 .1 7.5 7.7 .0 01:00 .030 .1 6.4 6.5 .0 02:00 .026 .1 6.9 7.0 .0 03:00 .020 .1 6.6 6.8 .0 04:00 .013 .4 7.3 7.8 .0 05:00 .022 .3 5.6 6.0 .0 06:00 .025 .6 5.2 5.9 .0 07:00 .034 .4 2.1 2.5 .0 08:00 .040 .2 1.2 1.4 .0 09:00 .043 .2 1.1 1.4 .0 10:00 .045 .3 1.2 1.6 .0 11:00 .048 .2 1.1 1.3 .0 12:00 .050 .2 1.0 1.2 .0 13:00 .051 .1 .9 1.0 .0 14:00 .051 .1 1.1 1.2 .0 15:00 .052 .1 C 1.1 C 1.2 C .0 16:00 .053 C C C .0 17:00 .052 .1 C 1.4 C 1.5 C .0 18:00 .051 .1 2.0 2.2 .0 19:00 .043 .1 7.0 7.1 .0 C 20:00 .039 .1 6.8 6.9 C 21:00 .040 .1 6.1 6.3 .2 C 22:00 .031 C .1 11.2 11.4 .2 23:00 C .1 10.0 10.2 .3 Average .038 .1 4.3 4.6 .0 Max .053 .6 11.2 11.4 .3 Max Hour 16:00 06:00 22:00 22:00 23:00 Min .013 .1 .9 1.0 .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 03-May-2026 15:46:00 16:11:00 66.7 70 -4.67% GPT-PS 03-May-2026 15:46:00 16:18:00 0.6 0.0 .61 GPTZ 03-May-2026 15:46:00 16:38:00 215.7 225 -4.13% GPT-PREC 03-May-2026 15:46:00 17:08:00 152.2 155 -1.76% NO2 GPT-PREC 03-May-2026 15:46:00 17:08:00 64.6 70 -7.58% NO2 Precision NO2_Diff PRECDIFF 03-May-2026 17:15:00 17:15:05 63.4 64.695 -1.94% NOx NOx_Auto NO-PREC 03-May-2026 15:46:00 16:11:00 66.6 70 -4.84% Ozone O3_Auto ZERO 03-May-2026 22:50:00 23:20:00 0 0.0 0.00 PREC 03-May-2026 22:50:00 23:50:00 0.067 0.07 -4.09% SO2 SO2_Auto ZERO 03-May-2026 19:46:00 20:11:00 0 0.0 0.00 SPAN 03-May-2026 19:46:00 20:36:00 84.9 90 -5.6% PREC 03-May-2026 19:46:00 21:01:00 37.5 40 -6.11% Date Printed: 5/4/2026 01:30 Daily Summary Report Site: Hattie Avenue (B) 5/3/2026 Interval: 001h PM2.5 PM10 STP PM Coarse Time ug/m3 ug/m3 ug/m3 00:00 4.7 9.7 5.3 01:00 3.8 7.5 4.0 02:00 4.0 7.0 3.2 03:00 4.3 7.9 3.9 04:00 5.4 9.3 4.2 05:00 4.6 7.9 3.5 06:00 4.6 9.6 5.2 07:00 4.4 8.9 4.6 08:00 3.5 8.6 5.2 09:00 3.1 7.7 4.6 10:00 2.9 7.3 4.4 11:00 2.9 7.5 4.5 12:00 2.9 6.5 3.5 13:00 2.8 6.9 4.0 14:00 2.8 7.5 4.5 15:00 2.7 6.2 3.4 16:00 2.7 6.9 4.1 17:00 2.9 7.0 4.0 18:00 3.0 7.9 4.8 19:00 3.4 8.3 4.9 20:00 3.9 9.9 6.1 21:00 4.2 8.4 4.3 22:00 5.7 11.8 6.2 23:00 6.5 11.4 5.1 Average 3.8 8.2 4.4 Max 6.5 11.8 6.2 Max Hour 23:00 22:00 22:00 Min 2.7 6.2 3.2 Count 24 24 24 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error 0.0 -6.11% Date Printed: 5/4/2026 01:30 Daily Summary Report Site: Union Cross 5/3/2026 Interval: 001h Ozone Barometric Pres. Temperature (°F) Dew Point (°F) Time ppm mmHg DegF DegF 00:00 .033 735.8 44.3 31.1 01:00 .034 736.0 45.0 30.0 02:00 .033 736.3 44.4 30.1 03:00 .026 736.7 41.4 30.4 04:00 .023 736.8 40.5 30.2 05:00 .021 737.5 38.9 30.8 06:00 .018 738.2 41.3 32.3 07:00 .028 738.7 46.8 33.6 08:00 .042 738.9 49.8 30.2 09:00 .044 739.0 51.5 30.0 10:00 .046 738.9 53.3 30.7 11:00 .049 738.6 55.8 30.3 12:00 .051 738.0 58.4 32.1 13:00 .052 737.6 60.4 33.1 14:00 .053 737.0 62.1 34.6 15:00 .053 736.4 63.5 35.8 16:00 .054 736.1 64.3 36.7 17:00 .053 735.8 64.5 37.7 18:00 .051 735.6 62.9 37.5 19:00 .044 735.7 59.0 35.5 20:00 .040 736.0 56.4 34.4 21:00 .039 736.3 54.0 33.4 22:00 .042 C 736.4 52.8 33.5 23:00 C 736.4 52.7 34.4 Average .040 737.0 52.6 32.8 Max .054 739.0 64.5 37.7 Max Hour 16:00 09:00 17:00 17:00 Min .018 735.6 38.9 30.0 Count 23 24 24 24 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error Ozone O3_Auto ZERO 03-May-2026 22:50:00 23:20:00 0 0.0 0.00 PREC 03-May-2026 22:50:00 23:50:00 0.069 0.07 -.09% 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