Date Printed: 5/19/2026 01:30 Daily Summary Report Site: Clemmons Middle 5/18/2026 Interval: 001h Ozone PM2.5 PM10 LC PM Coarse Time ppm ug/m3 ug/m3 ug/m3 00:00 .032 14.8 21.5 6.7 01:00 .025 14.5 20.7 6.1 02:00 .026 14.3 21.4 7.0 03:00 .028 B 15.6 23.4 7.7 04:00 .024 15.3 22.6 7.3 05:00 .021 14.9 21.7 6.7 06:00 .024 15.3 47.6 32.2 07:00 .034 12.7 20.2 7.5 08:00 .042 12.5 20.5 7.9 09:00 .050 11.5 20.5 9.0 10:00 .054 10.5 20.3 9.8 11:00 .057 10.3 18.4 8.0 12:00 .065 10.8 18.9 8.1 13:00 .062 10.2 19.4 9.1 14:00 .063 9.6 19.2 9.5 15:00 .067 9.0 22.0 13.0 16:00 .076 7.9 24.1 16.1 17:00 .075 B 8.4 32.5 24.1 18:00 .064 9.0 24.4 15.3 19:00 .055 8.9 18.3 9.4 20:00 .050 B 11.3 41.5 30.2 21:00 .046 12.2 30.1 17.9 22:00 .043 C 11.8 23.0 11.1 23:00 C 10.6 19.3 8.6 Average .047 11.7 23.8 12.0 Max .076 15.6 47.6 32.2 Max Hour 16:00 03:00 06:00 06:00 Min .021 7.9 18.3 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 18-May-2026 22:50:00 23:20:00 0.002 0.0 0.00 PREC 18-May-2026 22:50:00 23:50:00 0.071 0.07 1.65% Date Printed: 5/19/2026 01:30 Daily Summary Report Site: Hattie Avenue (A) 5/18/2026 Interval: 001h Ozone NO NO2 NOx SO2 Time ppm ppb ppb ppb ppb 00:00 .028 .3 9.2 9.6 -.2 01:00 .027 .4 8.6 9.0 -.2 02:00 .032 .2 7.0 7.3 .0 03:00 .032 .2 5.4 5.7 .0 04:00 .029 .3 5.8 6.1 -.1 05:00 .028 .4 6.8 7.3 -.2 06:00 .030 .8 6.8 7.6 .0 07:00 .034 1.2 6.8 8.0 -.1 08:00 .042 .8 4.5 5.3 -.2 09:00 .049 .5 3.2 3.7 -.2 10:00 .051 .3 2.4 2.7 -.2 11:00 .054 .2 2.0 2.3 -.2 12:00 .062 .1 2.2 2.4 .0 13:00 .061 .1 2.1 2.2 -.2 14:00 .061 .1 2.2 2.4 -.2 15:00 .067 .1 C 2.4 C 2.5 C -.3 16:00 .077 C C C -.2 17:00 .073 .1 C 3.4 C 3.6 C -.2 18:00 .063 .0 3.4 3.5 -.3 19:00 .054 .0 4.7 4.8 -.3 C 20:00 .046 .0 6.0 6.1 C 21:00 .048 .0 5.4 5.5 -.2 C 22:00 .045 C .0 5.4 5.5 .0 23:00 C .1 8.5 8.7 -.1 Average .047 .2 4.9 5.2 -.1 Max .077 1.2 9.2 9.6 .0 Max Hour 16:00 07:00 00:00 00:00 22:00 Min .027 .0 2.0 2.2 -.3 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 18-May-2026 15:46:00 16:11:00 66.4 70 -5.07% GPT-PS 18-May-2026 15:46:00 16:18:00 0.5 0.0 .51 GPTZ 18-May-2026 15:46:00 16:38:00 215.1 225 -4.38% GPT-PREC 18-May-2026 15:46:00 17:08:00 150.9 155 -2.62% NO2 GPT-PREC 18-May-2026 15:46:00 17:08:00 65.3 70 -6.69% NO2 Precision NO2_Diff PRECDIFF 18-May-2026 17:15:00 17:15:05 64.2 65.314 -1.69% NOx NOx_Auto NO-PREC 18-May-2026 15:46:00 16:11:00 66.6 70 -4.85% Ozone O3_Auto ZERO 18-May-2026 22:50:00 23:20:00 0 0.0 0.00 PREC 18-May-2026 22:50:00 23:50:00 0.066 0.07 -4.87% SO2 SO2_Auto ZERO 18-May-2026 19:46:00 20:11:00 -0.5 0.0 -.56 SPAN 18-May-2026 19:46:00 20:36:00 88.7 90 -1.37% PREC 18-May-2026 19:46:00 21:01:00 38.9 40 -2.69% Date Printed: 5/19/2026 01:30 Daily Summary Report Site: Hattie Avenue (B) 5/18/2026 Interval: 001h PM2.5 PM10 STP PM Coarse Time ug/m3 ug/m3 ug/m3 00:00 15.9 23.4 7.2 01:00 16.3 24.8 8.2 02:00 17.5 27.5 9.7 03:00 15.3 22.9 7.3 04:00 15.0 22.1 6.9 05:00 14.2 20.9 6.5 06:00 13.5 19.9 6.0 07:00 13.4 23.3 9.2 08:00 12.7 22.9 9.4 09:00 12.3 24.9 11.6 10:00 11.6 23.9 11.2 11:00 11.9 23.6 10.5 12:00 11.7 23.4 10.5 13:00 10.9 20.9 8.9 14:00 10.1 22.2 10.8 15:00 9.0 22.4 12.2 16:00 8.9 25.2 15.0 17:00 8.1 24.0 14.7 18:00 8.5 20.5 11.1 19:00 8.9 20.6 10.9 20:00 8.8 18.6 9.2 21:00 9.5 20.1 10.0 22:00 10.0 19.7 9.2 23:00 11.6 21.4 9.3 Average 11.9 22.4 9.8 Max 17.5 27.5 15.0 Max Hour 02:00 02:00 16:00 Min 8.1 18.6 6.0 Count 24 24 24 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error 0.0 -2.69% Date Printed: 5/19/2026 01:30 Daily Summary Report Site: Union Cross 5/18/2026 Interval: 001h Ozone Barometric Pres. Temperature (°F) Dew Point (°F) Time ppm mmHg DegF DegF 00:00 .035 740.7 70.7 60.1 01:00 .036 740.7 70.8 60.5 02:00 .038 740.9 69.7 60.9 03:00 .032 740.9 68.1 61.1 04:00 .029 741.0 67.1 61.4 05:00 .028 741.4 67.1 61.5 06:00 .030 742.0 69.2 61.9 07:00 .036 742.5 72.5 62.9 08:00 .042 742.6 76.2 64.2 09:00 .049 742.6 79.9 65.4 10:00 .051 742.6 83.1 66.3 11:00 .056 742.3 85.3 67.0 12:00 .062 741.9 87.1 67.7 13:00 .065 741.4 88.5 67.6 14:00 .071 741.1 89.3 66.8 15:00 .077 740.6 89.8 66.4 16:00 .074 740.5 89.2 65.5 17:00 .066 740.5 88.1 65.2 18:00 .061 740.6 86.0 64.7 19:00 .052 740.8 82.8 63.7 20:00 .047 741.1 80.5 62.8 21:00 .040 741.7 78.0 61.9 22:00 .039 C 741.9 76.0 61.4 23:00 C 742.1 75.0 61.6 Average .048 741.4 78.7 63.6 Max .077 742.6 89.8 67.7 Max Hour 15:00 10:00 15:00 12:00 Min .028 740.5 67.1 60.1 Count 23 24 24 24 Total Calibration Report Parameter Sequence Phase Start Time End Time Value Expected Value % Error Ozone O3_Auto ZERO 18-May-2026 22:50:00 23:20:00 0 0.0 0.00 PREC 18-May-2026 22:50:00 23:50:00 0.069 0.07 -.6% 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