We are in the process of ensuring this document
is accessible to all audiences. If you need
assistance accessing this document, or any
material on the EPA East Palestine, Ohio
emergency response webpages, please contact
the Region 5 Public Information Officer on-call
at:

R5_EastPalestine@epa.gov

Monitoring Period: 03/23/2023 00:00 through 03/24/2023 10:48

Air Monitering

Instrument:
Serial Number

Analyte

Screening Level1

Screening Level
Exceeded?

8-hour Period
Concentration Range

Average of All
8-hour Periods

W01A00000609

VOC (ppm)

0.5 ppm

No

0.00 to 0.05

0.01

W01A00002175

VOC (ppm)

0.5 ppm

No

0.00 to 0.00

0.00

W01A00002181

VOC (ppm)

0.5 ppm

No

0.00 to 0.00

0.00

W01A00002182

VOC (ppm)

0.5 ppm

No

0.00 to 0.03

0.01

W01B00002162

VOC (ppm)

0.5 ppm

No

0.00 to 0.00

0.00

W01B00002164

VOC (ppm)

0.5 ppm

No

0.00 to 0.00

0.00

W01B00002170

VOC (ppm)

0.5 ppm

No

0.00 to 0.00

0.00

W01B00002172

VOC (ppm)

0.5 ppm

No

0.00 to 0.00

0.00

W01B00002181

VOC (ppm)

0.5 ppm

No

0.00 to 0.00

0.00

W01B00002183

VOC (ppm)

0.5 ppm

No

0.00 to 0.01

0.00

W01B00002206

VOC (ppm)

0.5 ppm

No

0.00 to 0.00

0.00

W01B00002208

VOC (ppm)

0.5 ppm

No

0.00 to 0.00

0.00

W01B00002220

VOC (ppm)

0.5 ppm

No

0.00 to 0.00

0.00

W01B00002221

VOC (ppm)

0.5 ppm

No

0.00 to 0.00

0.00

W01B00002222

VOC (ppm)

0.5 ppm

No

0.00 to 0.00

0.00

W01B00002223

VOC (ppm)

0.5 ppm

No

0.00 to 0.00

0.00

Notes:

1	Site-Specific Screening Levels stated in the Tetra Tech Air Monitoring and Sampling Plan. Screening levels were modified on March 16,
2023 to reflect updated operation procedures on when to apply mitigation methods to reduce dust. Action levels set by health departments have
not changed.

2	Vehicle traffic observed during monitoring period near monitoring instrument.

Air monitoring measurements have been averaged over a 8-hour time period and summarized above.

Air monitoring is not performed during inclement weather conditions/rain and thunderstorms.

Particulate measurements (PM2 5 and PM10) were not collected during this monitoring period due to precipitation events
Abbreviations:

mg/m3 - milligrams per meter cubed

PM2 5 - Particulate Matter, diameter 2.5 micrometers and smaller
PM10 - Particulate Matter, diameter 10 micrometers and smaller
ppm - Parts per million
VOC - Volatile organic compound

We are in the process of ensuring this document is accessible to all audiences. If you need assistance accessing this document, or any materials
on the EPA East Palestine, Ohio emergency response webpages, please contact the Region 5 Public Information Officer on-call
r5_eastpalestine@epa. gov

Table 1

Community Continuous Air Monitoring Results
East Palestine Derailment Site
East Palestine, Columbiana County, Ohio


-------
WO 1600002164 W01B00002223

W01BQ0002172

W01B00Q02183,

W01B00002208

P W01A00002175 g

i mm

>W01A00002181-jwrt. Wf=

LW.0^A'00000b09M\A/Qll B00002220
I W01,BQQ0Q2221 iMfil

WO1'A0OOO2-182

iW0jB00002206'

W01B00002162 VV01BQ0002170

LW01B0000222-2i

W01B00002181

Plot for IYNG1 YOUNGS-OWN

Generated: 24 Mar 2023

Gamelands N

It

Figure 1

Continuous Air Monitoring
Community Stations

TETRA TECH

Prepared For: EPA

Prepared By: TetraTech Inc.

Legend

0 Continuous Air Monitoring Locations
A Derailment Location
One Mile Radius

Summary
Obs Used; 34
Obs Without Wind: 0
Avg Speed: 9.6 mph

Reference Map

Location

East Palestine Derailment ER Site
East Palestine, Columbiana County, OH 44413

Mies

Date Saved: 3/24/2023


-------