Date Printed: 4/22/2026 01:30 Daily Summary Report Site: Clemmons Middle 4/21/2026 Interval: 001h Ozone PM2.5 PM10 LC PM Coarse Time ppm ug/m3 ug/m3 ug/m3 00:00 .049 3.2 7.5 4.3 01:00 .048 3.1 6.4 3.3 02:00 .044 3.1 6.5 3.4 03:00 .036 3.3 6.9 3.6 04:00 .027 3.4 7.2 3.8 05:00 .021 3.7 8.7 5.0 06:00 .020 4.6 23.6 19.0 07:00 .034 4.0 10.3 6.3 08:00 .042 3.8 9.4 5.5 09:00 .045 3.9 19.0 15.0 10:00 .048 B 3.7 14.0 10.3 11:00 .051 3.9 11.8 7.8 12:00 .054 4.2 12.0 7.7 13:00 .057 4.2 11.8 7.6 14:00 .058 4.0 14.6 10.5 15:00 .058 4.2 15.3 11.0 16:00 .057 4.7 19.2 14.5 17:00 .054 4.8 23.3 18.4 18:00 .051 4.5 14.9 10.4 19:00 .044 6.6 41.5 34.8 20:00 .045 10.3 70.5 60.2 21:00 .046 5.9 20.1 14.1 22:00 .044 C 5.6 17.0 11.4 23:00 C 5.9 18.9 12.9 Average .044 4.5 17.1 12.5 Max .058 10.3 70.5 60.2 Max Hour 15:00 20:00 20:00 20:00 Min .020 3.1 6.4 3.3 Count 23 24 24 24 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error Ozone O3_Auto ZERO 21-Apr-2026 22:50:00 23:20:00 0 0.0 0.00 PREC 21-Apr-2026 22:50:00 23:50:00 0.069 0.07 .58% Date Printed: 4/22/2026 01:30 Daily Summary Report Site: Hattie Avenue (A) 4/21/2026 Interval: 001h Ozone NO NO2 NOx SO2 Time ppm ppb ppb ppb ppb 00:00 .049 .0 1.9 1.9 .1 01:00 .047 .0 2.2 2.2 .1 02:00 .043 .0 2.3 2.4 .0 03:00 .041 .0 2.5 2.5 .0 04:00 .037 .0 2.7 2.8 .0 05:00 .035 .1 3.2 3.3 .0 06:00 .035 .4 4.0 4.4 .0 07:00 .038 .7 3.3 4.1 .0 08:00 .042 .6 2.4 3.1 .0 09:00 .044 .8 2.8 3.7 .0 10:00 .047 .9 3.1 4.0 .0 11:00 .050 .8 3.2 4.1 .0 12:00 .053 .6 3.0 3.7 .0 13:00 .057 .4 2.9 3.3 .0 14:00 .059 .2 2.5 2.8 .1 15:00 .057 .2 C 2.4 C 2.6 C .0 16:00 .058 C C C .1 17:00 .056 .3 C 4.4 C 4.7 C .2 18:00 .050 .1 5.8 6.0 .2 19:00 .040 .1 10.5 10.7 .2 C 20:00 .038 .1 11.4 11.5 C 21:00 .041 .1 8.7 8.9 .2 C 22:00 .040 C .1 7.8 8.0 .5 23:00 C .1 6.7 6.8 .6 Average .045 .2 4.3 4.6 .1 Max .059 .9 11.4 11.5 .6 Max Hour 14:00 10:00 20:00 20:00 23:00 Min .035 .0 1.9 1.9 .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 21-Apr-2026 15:46:00 16:11:00 66.7 70 -4.63% GPT-PS 21-Apr-2026 15:46:00 16:18:00 0.5 0.0 .51 GPTZ 21-Apr-2026 15:46:00 16:38:00 215.4 225 -4.24% GPT-PREC 21-Apr-2026 15:46:00 17:08:00 150.6 155 -2.8% NO2 GPT-PREC 21-Apr-2026 15:46:00 17:08:00 65.9 70 -5.8% NO2 Precision NO2_Diff PRECDIFF 21-Apr-2026 17:15:00 17:15:05 64.7 65.938 -1.73% NOx NOx_Auto NO-PREC 21-Apr-2026 15:46:00 16:11:00 66.7 70 -4.67% Ozone O3_Auto ZERO 21-Apr-2026 22:50:00 23:20:00 0 0.0 0.00 PREC 21-Apr-2026 22:50:00 23:50:00 0.067 0.07 -3.77% SO2 SO2_Auto ZERO 21-Apr-2026 19:46:00 20:11:00 0 0.0 -.07 SPAN 21-Apr-2026 19:46:00 20:36:00 85.1 90 -5.33% PREC 21-Apr-2026 19:46:00 21:01:00 37.5 40 -6.03% Date Printed: 4/22/2026 01:30 Daily Summary Report Site: Hattie Avenue (B) 4/21/2026 Interval: 001h PM2.5 PM10 STP PM Coarse Time ug/m3 ug/m3 ug/m3 00:00 3.3 7.1 4.0 01:00 3.1 6.7 3.7 02:00 3.3 7.0 3.9 03:00 3.4 6.8 3.7 04:00 3.5 7.2 4.0 05:00 3.7 7.1 3.7 06:00 4.0 12.4 9.0 07:00 3.8 10.2 6.8 08:00 3.7 10.0 6.6 09:00 3.7 12.3 8.9 10:00 3.8 12.3 8.7 11:00 4.3 14.6 10.4 12:00 4.7 13.9 9.3 13:00 4.9 17.2 12.2 14:00 4.6 14.0 9.2 15:00 4.1 16.2 12.0 16:00 4.3 16.7 12.3 17:00 4.5 17.5 12.9 18:00 5.4 21.1 15.6 19:00 5.8 20.3 14.6 20:00 6.0 18.0 12.2 21:00 5.8 15.1 9.5 22:00 5.9 16.5 10.8 23:00 6.3 19.2 13.2 Average 4.4 13.3 9.0 Max 6.3 21.1 15.6 Max Hour 23:00 18:00 18:00 Min 3.1 6.7 3.7 Count 24 24 24 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error 0.0 -6.03% Date Printed: 4/22/2026 01:30 Daily Summary Report Site: Union Cross 4/21/2026 Interval: 001h Ozone Barometric Pres. Temperature (°F) Dew Point (°F) Time ppm mmHg DegF DegF 00:00 .049 743.3 48.7 24.6 01:00 .045 743.5 46.4 24.2 02:00 .042 743.5 43.9 24.3 03:00 .033 743.8 41.2 25.0 04:00 .031 744.2 39.6 25.2 05:00 .031 744.7 38.1 24.9 06:00 .029 745.5 39.0 25.2 07:00 .037 746.0 43.4 25.7 08:00 .042 746.1 47.3 26.1 09:00 .043 746.0 50.6 28.3 10:00 .048 745.7 53.9 29.6 11:00 .052 745.0 55.9 31.1 12:00 .055 744.3 59.2 33.9 13:00 .057 743.9 61.7 35.9 14:00 .059 743.1 63.4 37.5 15:00 .059 742.3 64.1 38.8 16:00 .057 741.9 63.9 39.4 17:00 .056 741.4 63.2 39.6 18:00 .049 741.3 61.5 39.8 19:00 .046 741.3 59.2 39.5 20:00 .044 741.3 57.9 38.9 21:00 .045 741.5 57.0 38.5 22:00 .043 C 741.3 56.7 38.5 23:00 C 741.2 55.2 38.2 Average .045 743.4 52.9 32.1 Max .059 746.1 64.1 39.8 Max Hour 15:00 08:00 15:00 18:00 Min .029 741.2 38.1 24.2 Count 23 24 24 24 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error Ozone O3_Auto ZERO 21-Apr-2026 22:50:00 23:20:00 0 0.0 0.00 PREC 21-Apr-2026 22:50:00 23:50:00 0.07 0.07 .08% 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