Date Printed: 4/15/2026 01:30 Daily Summary Report Site: Clemmons Middle 4/14/2026 Interval: 001h Ozone PM2.5 PM10 LC PM Coarse Time ppm ug/m3 ug/m3 ug/m3 00:00 .036 6.2 13.7 7.5 01:00 .030 6.4 13.3 6.9 02:00 .021 6.4 12.6 6.1 03:00 .022 7.3 17.7 10.4 04:00 .021 7.3 14.7 7.3 05:00 .014 7.6 14.5 6.8 06:00 .012 11.2 57.2 45.9 07:00 .021 10.4 36.0 25.5 08:00 .031 9.2 22.7 13.4 09:00 .043 8.8 19.1 10.3 10:00 .049 8.5 21.7 13.2 11:00 .054 7.4 19.3 11.8 12:00 .056 6.9 23.0 16.1 13:00 .059 B 7.0 22.5 15.4 14:00 .060 5.7 15.6 9.8 15:00 .063 5.9 14.6 8.6 16:00 .065 6.9 16.7 9.8 17:00 .065 8.5 24.6 16.1 18:00 .060 8.4 22.1 13.7 19:00 .058 9.3 31.3 22.0 20:00 .051 11.7 45.1 33.3 21:00 .052 9.2 20.7 11.4 22:00 .047 C 8.4 18.2 9.7 23:00 C 8.9 19.3 10.4 Average .043 8.0 22.3 14.2 Max .065 11.7 57.2 45.9 Max Hour 17:00 20:00 06:00 06:00 Min .012 5.7 12.6 6.1 Count 23 24 24 24 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error Ozone O3_Auto ZERO 14-Apr-2026 22:50:00 23:20:00 0 0.0 0.00 PREC 14-Apr-2026 22:50:00 23:50:00 0.069 0.07 .03% Date Printed: 4/15/2026 01:30 Daily Summary Report Site: Hattie Avenue (A) 4/14/2026 Interval: 001h Ozone NO NO2 NOx SO2 Time ppm ppb ppb ppb ppb 00:00 .039 .0 2.7 2.8 .0 01:00 .036 .1 3.0 3.1 .0 02:00 .035 .1 3.2 3.3 .0 03:00 .031 .1 4.9 5.1 .0 04:00 .028 .1 5.5 5.7 .0 05:00 .021 .2 7.7 8.0 .0 06:00 .011 1.8 15.3 17.1 .0 07:00 .020 2.0 9.8 11.9 .1 08:00 .030 2.5 7.8 10.4 .4 09:00 .039 1.7 7.0 8.8 .2 10:00 .048 1.2 5.7 7.0 .1 11:00 .057 .3 3.0 3.4 .2 12:00 .056 .2 2.1 2.4 .1 13:00 .057 .1 2.4 2.6 .1 14:00 .060 .2 2.4 2.6 .1 15:00 .058 .1 C 2.4 C 2.5 C .1 16:00 .060 C C C .1 17:00 .063 .1 C 3.5 C 3.7 C .1 18:00 .061 .0 4.6 4.8 .1 19:00 .055 .0 7.1 7.2 .1 C 20:00 .053 .1 7.0 7.2 C 21:00 .053 .0 5.1 5.2 .1 C 22:00 .051 C .0 3.7 3.8 .1 23:00 C .1 3.4 3.5 .1 Average .044 .4 5.1 5.7 .0 Max .063 2.5 15.3 17.1 .4 Max Hour 17:00 08:00 06:00 06:00 08:00 Min .011 .0 2.1 2.4 .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 14-Apr-2026 15:46:00 16:11:00 66.9 70 -4.4% GPT-PS 14-Apr-2026 15:46:00 16:18:00 0.3 0.0 .36 GPTZ 14-Apr-2026 15:46:00 16:38:00 216.4 225 -3.79% GPT-PREC 14-Apr-2026 15:46:00 17:08:00 150.7 155 -2.71% NO2 GPT-PREC 14-Apr-2026 15:46:00 17:08:00 66.4 70 -5.12% NO2 Precision NO2_Diff PRECDIFF 14-Apr-2026 17:15:00 17:15:05 65.6 66.419 -1.1% NOx NOx_Auto NO-PREC 14-Apr-2026 15:46:00 16:11:00 67.1 70 -4.01% Ozone O3_Auto ZERO 14-Apr-2026 22:50:00 23:20:00 0 0.0 0.00 PREC 14-Apr-2026 22:50:00 23:50:00 0.066 0.07 -4.4% SO2 SO2_Auto ZERO 14-Apr-2026 19:46:00 20:11:00 0 0.0 -.01 SPAN 14-Apr-2026 19:46:00 20:36:00 85.8 90 -4.63% PREC 14-Apr-2026 19:46:00 21:01:00 37.9 40 -5.16% Date Printed: 4/15/2026 01:30 Daily Summary Report Site: Hattie Avenue (B) 4/14/2026 Interval: 001h PM2.5 PM10 STP PM Coarse Time ug/m3 ug/m3 ug/m3 00:00 6.4 15.3 8.7 01:00 6.6 14.0 7.3 02:00 6.9 14.3 7.4 03:00 7.3 15.2 7.9 04:00 7.7 15.5 7.8 05:00 8.2 15.6 7.4 06:00 9.4 17.8 8.5 07:00 9.7 19.2 9.4 08:00 10.8 24.7 13.5 09:00 9.7 24.8 14.6 10:00 8.6 20.1 10.8 11:00 7.5 21.8 13.5 12:00 7.0 21.4 13.4 13:00 6.3 19.0 11.8 14:00 6.6 20.1 12.6 15:00 6.1 19.0 11.9 16:00 6.0 18.1 11.2 17:00 7.6 23.0 14.5 18:00 8.6 19.4 10.1 19:00 9.2 22.7 12.8 20:00 9.8 24.5 14.0 21:00 9.9 24.2 13.7 22:00 9.9 22.6 12.3 23:00 10.1 22.1 11.6 Average 8.1 19.7 11.1 Max 10.8 24.8 14.6 Max Hour 08:00 09:00 09:00 Min 6.0 14.0 7.3 Count 24 24 24 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error 0.0 -5.16% Date Printed: 4/15/2026 01:30 Daily Summary Report Site: Union Cross 4/14/2026 Interval: 001h Ozone Barometric Pres. Temperature (°F) Dew Point (°F) Time ppm mmHg DegF DegF 00:00 .033 740.2 65.0 52.7 01:00 .028 739.8 63.6 52.7 02:00 .029 739.6 62.6 52.6 03:00 .021 739.5 61.1 52.7 04:00 .022 739.4 60.6 53.1 05:00 .017 739.6 59.1 53.2 06:00 .021 740.0 59.4 53.5 07:00 .028 740.5 62.8 54.2 08:00 .034 740.5 66.0 54.9 09:00 .045 740.6 70.9 55.7 10:00 .050 740.5 74.7 56.7 11:00 .055 739.9 78.0 56.8 12:00 .057 739.3 80.0 57.5 13:00 .058 739.0 81.1 56.9 14:00 .062 738.4 82.9 58.1 15:00 .063 738.0 83.3 57.8 16:00 .064 737.8 83.1 58.0 17:00 .066 737.7 81.1 57.4 18:00 .063 737.6 79.3 56.2 19:00 .056 737.5 75.5 54.3 20:00 .054 737.5 73.4 53.7 21:00 .052 737.7 73.1 54.2 22:00 .053 C 737.7 72.0 53.6 23:00 C 737.7 71.1 53.0 Average .044 739.0 71.6 54.9 Max .066 740.6 83.3 58.1 Max Hour 17:00 09:00 15:00 14:00 Min .017 737.5 59.1 52.6 Count 23 24 24 24 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error Ozone O3_Auto ZERO 14-Apr-2026 22:50:00 23:20:00 0 0.0 0.00 PREC 14-Apr-2026 22:50:00 23:50:00 0.07 0.07 .46% 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