Table 1
Community Continuous Air Monitoring Results
East Palestine Derailment Site
East Palestine, Columbiana County, Ohio
Monitoring Period: 03/02/2023 00:00 to 03/03/2023 10:56
Air Monitoring Instrument
Serial Number
Analyte
Screening Level1
Screening Level
Exceeded?
8-hour Period
Concentration Range
Average of All
8-hour Periods
W01A00001706
VOC (ppm)
0.5 ppm
No
0.00 to 0.00
0.00
CO (ppm)
9 ppm
No
0.00 to 0.00
0.00
H2S (ppm)
0.1 ppm
No
0.0 to 0.0
0.00
LEL (%)
>5%
No
0.0 to 0.0
0.0
W01A00001710
VOC (ppm)
0.5 ppm
No
0.00 to 0.01
0.00
CO (ppm)
9 ppm
No
0.00 to 0.00
0.00
H2S (ppm)
0.1 ppm
No
0.0 to 0.0
0.0
LEL (%)
>5%
No
0.0 to 0.0
0.0
W01B00002162
VOC (ppm)
0.5 ppm
No
0.00 to 0.00
0.00
CO (ppm)
9 ppm
No
0.00 to 0.01
0.00
H2S (ppm)
0.1 ppm
No
0.0 to 0.0
0.0
LEL (%)
>5%
No
0.0 to 0.0
0.0
W01B00002164
VOC (ppm)
0.5 ppm
No
0.00 to 0.00
0.00
CO (ppm)
9 ppm
No
0.00 to 0.00
0.00
H2S (ppm)
0.1 ppm
No
0.0 to 0.0
0.0
LEL (%)
>5%
No
0.0 to 0.0
0.0
W01B00002170
VOC (ppm)
0.5 ppm
No
0.00 to 0.00
0.00
CO (ppm)
9 ppm
No
0.00 to 0.01
0.00
H2S (ppm)
0.1 ppm
No
0.0 to 0.0
0.0
LEL (%)
>5%
No
0.0 to 0.0
0.0
W01B00002172
VOC (ppm)
0.5 ppm
No
0.00 to 0.00
0.00
CO (ppm)
9 ppm
No
0.00 to 0.00
0.00
H2S (ppm)
0.1 ppm
No
0.0 to 0.0
0.0
HCN (ppm)
1 ppm
No
0.0 to 0.0
0.0
LEL (%)
>5%
No
0.0 to 0.0
0.0
W01B00002181
VOC (ppm)
0.5 ppm
No
0.00 to 0.00
0.00
CO (ppm)
9 ppm
No
0.00 to 0.00
0.00
H2S (ppm)
0.1 ppm
No
0.0 to 0.0
0.0
LEL (%)
>5%
No
0.0 to 0.0
0.0
W01B00002183
VOC (ppm)
0.5 ppm
No
0.00 to 0.00
0.00
CO (ppm)
9 ppm
No
0.00 to 0.00
0.00
H2S (ppm)
0.1 ppm
No
0.0 to 0.0
0.0
HCN (ppm)
1 ppm
No
0.0 to 0.0
0.0
LEL (%)
>5%
No
0.0 to 0.0
0.0
W01B00002206
VOC (ppm)
0.5 ppm
No
0.00 to 0.00
0.00
CO (ppm)
9 ppm
No
0.00 to 0.00
0.00
H2S (ppm)
0.1 ppm
No
0.0 to 0.0
0.0
LEL (%)
>5%
No
0.0 to 0.0
0.0
W01B00002207
VOC (ppm)
0.5 ppm
No
0.00 to 0.00
0.00
CO (ppm)
9 ppm
No
0.00 to 0.00
0.00
H2S (ppm)
0.1 ppm
No
0.0 to 0.0
0.0
W01B00002208
VOC (ppm)
0.5 ppm
No
0.00 to 0.00
0.00
CO (ppm)
9 ppm
No
0.00 to 0.01
0.00
H2S (ppm)
0.1 ppm
No
0.0 to 0.0
0.0
LEL (%)
>5%
No
0.0 to 0.0
0.0
W01B00002220
VOC (ppm)
0.5 ppm
No
0.00 to 0.00
0.00
CO (ppm)
9 ppm
No
0.00 to 0.00
0.00
H2S (ppm)
0.1 ppm
No
0.0 to 0.0
0.0
LEL (%)
>5%
No
0.0 to 0.0
0.0
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Table 1
Community Continuous Air Monitoring Results
East Palestine Derailment Site
East Palestine, Columbiana County, Ohio
Monitoring Period: 03/02/2023 00:00 to 03/03/2023 10:56
Air Monitoring Instrument
Serial Number
Analyte
Screening Level1
Screening Level
Exceeded?
8-hour Period
Concentration Range
Average of All
8-hour Periods
W01B00002221
VOC (ppm)
0.5 ppm
No
0.00 to 0.00
0.00
CO (ppm)
9 ppm
No
0.00 to 0.00
0.00
H2S (ppm)
0.1 ppm
No
0.0 to 0.0
0.0
LEL (%)
>5%
No
0.0 to 0.0
0.0
W01B00002222
VOC (ppm)
0.5 ppm
No
0.00 to 0.00
0.00
CO (ppm)
9 ppm
No
0.00 to 0.00
0.00
H2S (ppm)
0.1 ppm
No
0.0 to 0.0
0.0
LEL (%)
>5%
No
0.0 to 0.0
0.0
W01B00002223
VOC (ppm)
0.5 ppm
No
0.00 to 0.00
0.00
CO (ppm)
9 ppm
No
0.00 to 0.00
0.00
H2S (ppm)
0.1 ppm
No
0.0 to 0.0
0.0
LEL (%)
>5%
No
0.0 to 0.0
0.0
Notes:
1 Site-Specific Action Level stated in the Tetra Tech Air Monitoring and Sampling Plan.
Air monitoring measurements have been averaged over a 8-hour time period and summarized above.
Start and stop times for each air monitoring instrument varies. The monitoring period is based on the earliest start time and latest stop time out of all
units.
Air monitoring is not performed during inclement weather conditions/rain and thunderstorms.
< - Less than
> - Greater than
% - Percent
CO - Carbon Monoxide
H2S - Hydrogen Sulfide
HCN - Hydrogen Cyanide
LEL - Lower Explosive Limit
mg/m3 - milligrams per cubic meter
02 - Oxygen
PM2 5 - particles that are 2.5 micrometers and smaller
PM10 - particles that are 10 micrometers and smaller
ppm - Parts per million
S/N - Serial number
VOC - Volatile organic compounds
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