Date Printed: 4/28/2026 01:30 Daily Summary Report Site: Clemmons Middle 4/27/2026 Interval: 001h Ozone PM2.5 PM10 LC PM Coarse Time ppm ug/m3 ug/m3 ug/m3 00:00 .041 2.3 4.9 2.5 01:00 .043 2.4 4.2 1.8 02:00 .046 2.7 4.9 2.1 03:00 .046 2.9 4.9 1.9 04:00 .044 2.7 4.6 1.8 05:00 .042 2.6 5.3 2.7 06:00 .040 2.5 4.0 1.5 07:00 .038 3.2 6.3 3.0 08:00 .048 2.5 5.8 3.2 09:00 .055 2.1 5.2 3.0 10:00 .055 B 2.6 6.0 3.4 11:00 .058 2.8 6.5 3.7 12:00 .059 2.9 6.8 3.9 13:00 .061 B B B 14:00 .062 B B B B 15:00 .064 3.5 13.2 9.6 16:00 .066 3.5 12.2 8.7 17:00 .066 3.4 12.4 9.0 18:00 .060 3.3 11.1 7.7 19:00 .050 3.4 14.4 11.0 20:00 .046 3.6 9.8 6.1 21:00 .049 4.3 11.3 7.0 22:00 .050 C 4.5 9.9 5.4 23:00 C 4.7 9.4 4.6 Average .051 3.1 7.8 4.7 Max .066 4.7 14.4 11.0 Max Hour 17:00 23:00 19:00 19:00 Min .038 2.1 4.0 1.5 Count 23 22 22 22 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error Ozone O3_Auto ZERO 27-Apr-2026 22:50:00 23:20:00 0.001 0.0 0.00 PREC 27-Apr-2026 22:50:00 23:50:00 0.071 0.07 2.28% Date Printed: 4/28/2026 01:30 Daily Summary Report Site: Hattie Avenue (A) 4/27/2026 Interval: 001h Ozone NO NO2 NOx SO2 Time ppm ppb ppb ppb ppb 00:00 .038 .0 1.0 1.1 .0 01:00 .042 .1 .9 1.1 .0 02:00 .044 .1 .9 1.1 .0 03:00 .041 .1 1.1 1.2 .0 04:00 .039 .0 1.0 1.1 .0 05:00 .040 .1 1.8 1.9 .0 06:00 .033 .3 2.4 2.8 .0 07:00 .037 .6 2.9 3.6 .0 08:00 .047 .7 2.7 3.4 .0 09:00 .052 .2 1.1 1.3 .0 10:00 .054 .2 1.1 1.4 .0 11:00 .054 .3 1.3 1.7 .0 12:00 .055 .2 1.3 1.5 .0 13:00 .055 .2 1.5 1.8 .0 14:00 .056 .2 1.8 2.1 .0 15:00 .059 .2 C 2.1 C 2.4 C .0 16:00 .061 C C C .0 17:00 .062 .1 C 2.9 C 3.0 C .0 18:00 .058 .1 4.0 4.2 .0 19:00 .050 .1 5.7 5.9 .0 C 20:00 .044 .1 5.8 5.9 C 21:00 .046 .1 4.5 4.6 .0 C 22:00 .049 C .1 3.3 3.4 .0 23:00 C .1 2.4 2.5 .0 Average .048 .1 2.3 2.5 .0 Max .062 .7 5.8 5.9 .0 Max Hour 17:00 08:00 20:00 20:00 23:00 Min .033 .0 .9 1.1 .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 27-Apr-2026 15:46:00 16:11:00 66.7 70 -4.67% GPT-PS 27-Apr-2026 15:46:00 16:18:00 0.5 0.0 .52 GPTZ 27-Apr-2026 15:46:00 16:38:00 215.8 225 -4.09% GPT-PREC 27-Apr-2026 15:46:00 17:08:00 150.3 155 -2.99% NO2 GPT-PREC 27-Apr-2026 15:46:00 17:08:00 65.8 70 -5.95% NO2 Precision NO2_Diff PRECDIFF 27-Apr-2026 17:15:00 17:15:05 65.4 65.838 -.61% NOx NOx_Auto NO-PREC 27-Apr-2026 15:46:00 16:11:00 66.7 70 -4.66% Ozone O3_Auto ZERO 27-Apr-2026 22:50:00 23:20:00 0 0.0 0.00 PREC 27-Apr-2026 22:50:00 23:50:00 0.067 0.07 -3.26% SO2 SO2_Auto ZERO 27-Apr-2026 19:46:00 20:11:00 0 0.0 -.04 SPAN 27-Apr-2026 19:46:00 20:36:00 84.9 90 -5.58% PREC 27-Apr-2026 19:46:00 21:01:00 37.7 40 -5.74% Date Printed: 4/28/2026 01:30 Daily Summary Report Site: Hattie Avenue (B) 4/27/2026 Interval: 001h PM2.5 PM10 STP PM Coarse Time ug/m3 ug/m3 ug/m3 00:00 2.5 4.4 2.0 01:00 2.5 4.6 2.2 02:00 2.8 5.1 2.4 03:00 2.9 4.7 1.8 04:00 2.9 5.4 2.6 05:00 2.6 5.4 2.8 06:00 3.1 5.4 2.5 07:00 3.2 5.9 2.7 08:00 2.4 6.1 3.7 09:00 2.5 6.2 3.7 10:00 2.8 6.0 3.2 11:00 2.8 7.9 5.0 12:00 2.9 7.6 4.5 13:00 3.3 8.3 4.9 14:00 3.3 9.6 6.1 15:00 3.4 9.9 6.4 16:00 3.6 12.7 8.8 17:00 3.8 15.0 11.0 18:00 3.7 12.7 8.8 19:00 3.6 11.6 7.9 20:00 3.9 10.5 6.5 21:00 4.2 12.3 8.1 22:00 4.6 14.2 9.6 23:00 4.8 11.1 6.4 Average 3.2 8.4 5.1 Max 4.8 15.0 11.0 Max Hour 23:00 17:00 17:00 Min 2.4 4.4 1.8 Count 24 24 24 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error 0.0 -5.74% Date Printed: 4/28/2026 01:30 Daily Summary Report Site: Union Cross 4/27/2026 Interval: 001h Ozone Barometric Pres. Temperature (°F) Dew Point (°F) Time ppm mmHg DegF DegF 00:00 .040 740.4 51.0 40.9 01:00 .043 B 740.3 50.7 40.7 02:00 .045 740.0 50.6 40.7 03:00 .043 740.2 50.7 41.2 04:00 .041 740.5 50.3 41.8 05:00 .037 741.1 50.0 42.1 06:00 .033 741.5 50.1 42.7 07:00 .037 741.7 51.3 42.8 08:00 .048 741.9 53.1 41.4 09:00 .051 741.8 55.5 39.9 10:00 .054 741.5 58.8 40.0 11:00 .055 741.3 61.3 42.0 12:00 .056 741.0 63.0 43.5 13:00 .057 740.6 65.6 45.3 14:00 .059 740.1 67.6 46.4 15:00 .061 739.7 69.2 46.7 16:00 .062 739.7 69.8 46.9 17:00 .061 739.6 69.3 46.7 18:00 .054 739.7 66.8 45.8 19:00 .045 740.1 63.0 44.9 20:00 .042 740.7 60.5 44.4 21:00 .046 740.7 59.2 44.3 22:00 .048 C 740.8 58.0 43.9 23:00 C 740.9 55.5 44.1 Average .048 740.6 58.3 43.2 Max .062 741.9 69.8 46.9 Max Hour 16:00 08:00 16:00 16:00 Min .033 739.6 50.0 39.9 Count 23 24 24 24 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error Ozone O3_Auto ZERO 27-Apr-2026 22:50:00 23:20:00 0 0.0 0.00 PREC 27-Apr-2026 22:50:00 23:50:00 0.07 0.07 .69% 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