Date Printed: 4/11/2026 01:30 Daily Summary Report Site: Clemmons Middle 4/10/2026 Interval: 001h Ozone PM2.5 PM10 LC PM Coarse Time ppm ug/m3 ug/m3 ug/m3 00:00 .015 5.7 12.7 7.0 01:00 .012 5.8 11.5 5.6 02:00 .009 5.8 12.4 6.5 03:00 .009 5.7 12.0 6.2 04:00 .007 5.9 11.7 5.8 05:00 .004 5.9 12.2 6.3 06:00 .003 7.2 35.0 27.9 07:00 .010 7.8 28.8 20.8 08:00 .026 6.6 15.6 8.9 09:00 .045 6.1 17.8 11.6 10:00 .051 B 6.1 18.7 12.5 11:00 .056 6.4 21.2 14.7 12:00 .058 5.8 16.4 10.6 13:00 .059 6.0 17.2 11.1 14:00 .062 6.6 15.9 9.3 15:00 .062 7.0 16.5 9.5 16:00 .063 7.1 18.6 11.4 17:00 .065 6.9 18.9 11.9 18:00 .061 6.6 19.5 12.9 19:00 .056 6.5 20.1 13.5 20:00 .051 8.2 29.2 20.8 21:00 .045 8.3 28.9 20.6 22:00 .043 C 7.3 20.6 13.3 23:00 C 7.0 18.5 11.4 Average .037 6.5 18.7 12.0 Max .065 8.3 35.0 27.9 Max Hour 17:00 21:00 06:00 06:00 Min .003 5.7 11.5 5.6 Count 23 24 24 24 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error Ozone O3_Auto ZERO 10-Apr-2026 22:50:00 23:20:00 0 0.0 0.00 PREC 10-Apr-2026 22:50:00 23:50:00 0.07 0.07 -.3% Date Printed: 4/11/2026 01:30 Daily Summary Report Site: Hattie Avenue (A) 4/10/2026 Interval: 001h Ozone NO NO2 NOx SO2 Time ppm ppb ppb ppb ppb 00:00 .003 2.3 27.6 30.0 .0 01:00 .004 1.4 24.8 26.2 .0 02:00 .006 .7 17.4 18.2 .0 03:00 .002 4.2 25.3 29.6 .0 04:00 .001 13.5 21.8 35.3 .1 05:00 .001 18.2 20.6 38.8 .2 06:00 .002 27.4 18.3 45.7 .3 07:00 .008 21.0 20.6 41.6 .3 08:00 .031 6.4 15.0 21.4 .2 09:00 .044 1.8 6.8 8.6 .2 10:00 .050 .8 3.9 4.8 .2 11:00 .055 .6 3.5 4.1 .2 12:00 .059 .4 3.2 3.7 .2 13:00 .062 .3 3.0 3.3 .2 14:00 .062 .2 2.6 2.9 .1 15:00 .061 .2 C 2.5 C 2.8 C .1 16:00 .062 C C C .1 17:00 .064 .2 C 3.6 C 3.8 C .2 18:00 .058 .1 6.5 6.7 .2 19:00 .052 .1 8.8 8.9 .2 C 20:00 .047 .1 11.1 11.2 C 21:00 .047 .1 10.0 10.1 .1 C 22:00 .047 C .1 8.7 8.9 .1 23:00 C .1 5.6 5.8 .1 Average .036 4.3 11.7 16.1 .1 Max .064 27.4 27.6 45.7 .3 Max Hour 17:00 06:00 00:00 06:00 07:00 Min .001 .1 2.5 2.8 .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 10-Apr-2026 15:46:00 16:11:00 67 70 -4.27% GPT-PS 10-Apr-2026 15:46:00 16:18:00 0.5 0.0 .57 GPTZ 10-Apr-2026 15:46:00 16:38:00 216.1 225 -3.91% GPT-PREC 10-Apr-2026 15:46:00 17:08:00 151 155 -2.55% NO2 GPT-PREC 10-Apr-2026 15:46:00 17:08:00 65.7 70 -6.05% NO2 Precision NO2_Diff PRECDIFF 10-Apr-2026 17:15:00 17:15:05 65.1 65.765 -.94% NOx NOx_Auto NO-PREC 10-Apr-2026 15:46:00 16:11:00 67 70 -4.18% Ozone O3_Auto ZERO 10-Apr-2026 22:50:00 23:20:00 0 0.0 0.00 PREC 10-Apr-2026 22:50:00 23:50:00 0.066 0.07 -4.84% SO2 SO2_Auto ZERO 10-Apr-2026 19:46:00 20:11:00 -0.1 0.0 -.11 SPAN 10-Apr-2026 19:46:00 20:36:00 85.6 90 -4.84% PREC 10-Apr-2026 19:46:00 21:01:00 37.8 40 -5.49% Date Printed: 4/11/2026 01:30 Daily Summary Report Site: Hattie Avenue (B) 4/10/2026 Interval: 001h PM2.5 PM10 STP PM Coarse Time ug/m3 ug/m3 ug/m3 00:00 7.1 16.1 9.6 01:00 7.4 15.3 8.6 02:00 7.5 15.7 8.8 03:00 7.4 15.5 8.8 04:00 7.9 21.5 14.7 05:00 8.2 20.0 12.8 06:00 8.0 21.5 14.6 07:00 8.5 27.7 20.0 08:00 7.1 20.2 13.3 09:00 B B B 10:00 B B B 11:00 6.7 B 19.7 B 12.8 B 12:00 6.2 18.3 11.8 13:00 6.7 18.7 11.6 14:00 7.0 19.3 11.9 15:00 7.2 18.0 10.2 16:00 7.3 17.7 10.0 17:00 7.7 18.6 10.5 18:00 7.6 17.5 9.6 19:00 7.3 19.1 11.7 20:00 7.9 20.3 12.4 21:00 7.7 18.9 11.2 22:00 7.2 19.8 12.6 23:00 6.6 16.7 10.1 Average 7.3 18.9 11.7 Max 8.5 27.7 20.0 Max Hour 07:00 07:00 07:00 Min 6.2 15.3 8.6 Count 22 22 22 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error 0.0 -5.49% Date Printed: 4/11/2026 01:30 Daily Summary Report Site: Union Cross 4/10/2026 Interval: 001h Ozone Barometric Pres. Temperature (°F) Dew Point (°F) Time ppm mmHg DegF DegF 00:00 .018 745.3 45.0 30.2 01:00 .015 744.8 45.2 29.9 02:00 .021 744.3 44.4 29.4 03:00 .012 744.3 41.2 30.6 04:00 .005 744.5 41.0 30.3 05:00 .004 744.9 40.4 30.1 06:00 .009 745.4 43.4 30.1 07:00 .013 745.4 51.0 35.8 08:00 .038 745.5 57.2 36.9 09:00 .049 745.4 60.1 41.3 10:00 .053 745.2 63.5 42.5 11:00 .056 744.7 66.0 42.7 12:00 .057 744.0 68.6 44.3 13:00 .059 743.2 71.5 46.0 14:00 .061 742.4 73.4 46.8 15:00 .063 741.6 75.1 47.8 16:00 .066 741.3 75.3 48.3 17:00 .066 741.3 74.2 47.8 18:00 .059 741.5 71.0 45.8 19:00 .055 741.8 67.6 43.8 20:00 .056 742.2 65.7 43.0 21:00 .052 742.3 63.9 42.9 22:00 .048 C 742.2 61.8 42.1 23:00 C 741.9 61.1 41.7 Average .040 743.5 59.4 39.5 Max .066 745.5 75.3 48.3 Max Hour 17:00 08:00 16:00 16:00 Min .004 741.3 40.4 29.4 Count 23 24 24 24 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error Ozone O3_Auto ZERO 10-Apr-2026 22:50:00 23:20:00 0.001 0.0 0.00 PREC 10-Apr-2026 22:50:00 23:50:00 0.07 0.07 .32% 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