Date Printed: 4/8/2026 01:30 Daily Summary Report Site: Clemmons Middle 4/7/2026 Interval: 001h Ozone PM2.5 PM10 LC PM Coarse Time ppm ug/m3 ug/m3 ug/m3 00:00 .028 B 4.9 9.7 4.8 01:00 .023 4.9 9.6 4.6 02:00 .020 5.0 9.0 4.0 03:00 .016 5.1 8.9 3.8 04:00 .009 5.0 8.2 3.1 05:00 .007 5.3 11.2 5.9 06:00 .005 5.5 11.6 6.0 07:00 .021 4.5 10.3 5.7 08:00 .038 3.6 9.1 5.5 09:00 .044 3.3 8.4 5.0 10:00 .047 3.2 7.4 4.1 11:00 .048 3.1 6.8 3.6 12:00 .049 3.0 8.3 5.2 13:00 .051 3.2 7.6 4.4 14:00 .053 3.2 7.5 4.3 15:00 .053 3.1 6.8 3.7 16:00 .052 B 3.0 7.9 4.8 17:00 .051 3.0 7.5 4.5 18:00 .051 3.0 6.6 3.6 19:00 .047 3.0 7.4 4.4 20:00 .041 3.3 7.8 4.4 21:00 .037 3.5 8.4 4.8 22:00 .048 C 3.6 7.7 4.1 23:00 C 4.0 7.3 3.3 Average .036 3.8 8.3 4.4 Max .053 5.5 11.6 6.0 Max Hour 15:00 06:00 06:00 06:00 Min .005 3.0 6.6 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 07-Apr-2026 22:50:00 23:20:00 0 0.0 0.00 PREC 07-Apr-2026 22:50:00 23:50:00 0.069 0.07 -.58% Date Printed: 4/8/2026 01:30 Daily Summary Report Site: Hattie Avenue (A) 4/7/2026 Interval: 001h Ozone NO NO2 NOx SO2 Time ppm ppb ppb ppb ppb 00:00 .031 .1 5.3 5.5 .0 01:00 .026 .1 6.5 6.7 .0 02:00 .022 .2 7.5 7.7 .0 03:00 .018 .2 9.4 9.6 .0 04:00 .016 .3 9.0 9.3 .0 05:00 .006 1.2 18.0 19.2 .0 06:00 .009 5.4 22.8 28.3 .0 07:00 .030 1.7 9.5 11.3 .0 08:00 .040 .4 2.1 2.5 .1 09:00 .043 .3 1.7 2.1 .1 10:00 .047 .3 1.4 1.7 .1 11:00 .048 .2 1.3 1.6 .2 12:00 .050 .1 1.1 1.3 .1 13:00 .050 .1 1.1 1.3 .1 14:00 .051 .1 1.2 1.4 .0 15:00 .052 .1 C 1.1 C 1.2 C .0 16:00 .051 C C C .0 17:00 .052 .1 C 1.6 C 1.8 C .0 18:00 .050 .1 2.2 2.4 .0 19:00 .045 .2 5.3 5.5 .0 C 20:00 .044 .1 4.7 4.9 C 21:00 .046 .1 3.1 3.2 .0 C 22:00 .048 C .0 2.1 2.1 .0 23:00 C .0 2.1 2.1 .0 Average .038 .4 5.2 5.7 .0 Max .052 5.4 22.8 28.3 .2 Max Hour 17:00 06:00 06:00 06:00 11:00 Min .006 .0 1.1 1.2 .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 07-Apr-2026 15:46:00 16:11:00 66.8 70 -4.52% GPT-PS 07-Apr-2026 15:46:00 16:18:00 0.5 0.0 .53 GPTZ 07-Apr-2026 15:46:00 16:38:00 216.1 225 -3.95% GPT-PREC 07-Apr-2026 15:46:00 17:08:00 151.6 155 -2.14% NO2 GPT-PREC 07-Apr-2026 15:46:00 17:08:00 64.8 70 -7.42% NO2 Precision NO2_Diff PRECDIFF 07-Apr-2026 17:15:00 17:15:05 64.4 64.804 -.57% NOx NOx_Auto NO-PREC 07-Apr-2026 15:46:00 16:11:00 66.8 70 -4.5% Ozone O3_Auto ZERO 07-Apr-2026 22:50:00 23:20:00 0 0.0 0.00 PREC 07-Apr-2026 22:50:00 23:50:00 0.067 0.07 -3.45% SO2 SO2_Auto ZERO 07-Apr-2026 19:46:00 20:11:00 -0.1 0.0 -.13 SPAN 07-Apr-2026 19:46:00 20:36:00 85.8 90 -4.62% PREC 07-Apr-2026 19:46:00 21:01:00 37.8 40 -5.49% Date Printed: 4/8/2026 01:30 Daily Summary Report Site: Hattie Avenue (B) 4/7/2026 Interval: 001h PM2.5 PM10 STP PM Coarse Time ug/m3 ug/m3 ug/m3 00:00 5.0 9.9 5.0 01:00 5.3 9.9 4.8 02:00 5.4 9.7 4.5 03:00 5.5 10.1 4.8 04:00 5.4 10.8 5.7 05:00 6.0 12.6 7.0 06:00 5.4 14.1 9.0 07:00 7.4 26.1 19.1 08:00 3.6 8.9 5.4 09:00 3.3 7.5 4.1 10:00 3.3 7.6 4.3 11:00 3.3 8.6 5.3 12:00 3.1 7.8 4.7 13:00 3.0 6.8 3.7 14:00 3.0 8.0 4.9 15:00 2.9 7.3 4.3 16:00 3.0 7.9 4.8 17:00 3.1 8.0 4.8 18:00 3.0 7.6 4.6 19:00 3.6 10.5 6.9 20:00 3.8 9.3 5.6 21:00 3.3 7.0 3.8 22:00 3.6 7.4 3.9 23:00 4.0 7.5 3.7 Average 4.0 9.6 5.6 Max 7.4 26.1 19.1 Max Hour 07:00 07:00 07:00 Min 2.9 6.8 3.7 Count 24 24 24 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error 0.0 -5.49% Date Printed: 4/8/2026 01:30 Daily Summary Report Site: Union Cross 4/7/2026 Interval: 001h Ozone Barometric Pres. Temperature (°F) Dew Point (°F) Time ppm mmHg DegF DegF 00:00 .034 739.5 51.4 37.1 01:00 .032 739.4 50.2 37.3 02:00 .032 739.3 49.5 37.6 03:00 .028 739.5 47.8 37.5 04:00 .023 739.7 46.7 37.4 05:00 .022 740.1 47.6 36.3 06:00 .016 740.7 47.1 35.6 07:00 .022 741.4 50.5 35.2 08:00 .039 741.9 53.4 33.6 09:00 .043 742.2 55.2 33.8 10:00 .047 742.7 56.9 33.6 11:00 .048 742.5 58.0 34.1 12:00 .049 742.2 59.3 34.6 13:00 .050 742.0 60.5 35.1 14:00 .051 741.4 62.1 36.1 15:00 .051 741.1 63.9 37.2 16:00 .052 741.1 64.5 37.2 17:00 .052 741.1 64.0 36.4 18:00 .050 741.3 62.5 34.8 19:00 .045 741.9 59.3 33.6 20:00 .039 742.6 56.1 33.5 21:00 .034 743.3 54.0 32.6 22:00 .042 C 743.6 53.2 29.8 23:00 C 743.7 51.3 27.8 Average .039 741.4 55.2 34.9 Max .052 743.7 64.5 37.6 Max Hour 17:00 23:00 16:00 02:00 Min .016 739.3 46.7 27.8 Count 23 24 24 24 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error Ozone O3_Auto ZERO 07-Apr-2026 22:50:00 23:20:00 0 0.0 0.00 PREC 07-Apr-2026 22:50:00 23:50:00 0.07 0.07 .07% 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