Table 1

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

Monitoring Period: 03/25/2023 00:00 through 03/26/2023 11:59

Air Monitering

Instrument:
Serial Number

Analyte

Screening Level1

Screening Level
Exceeded?

8-hour Period
Concentration Range

Average of All
8-hour Periods

8533230503

PM2 5 (mg/m3)

0.035 mg/m3

No

0.001 to 0.007

0.003

PM10 (mg/m3)

0.070 mg/m3

No

0.003 to 0.012

0.006

8533230504

PM2 5 (mg/m3)

0.035 mg/m3

No

0.000 to 0.014

0.005

PM10 (mg/m3)

0.070 mg/m3

No

0.000 to 0.015

0.006

8533230702

PM2 5 (mg/m3)

0.035 mg/m3

No

0.000 to 0.008

0.002

PM10 (mg/m3)

0.070 mg/m3

No

0.000 to 0.011

0.004

W01A00000609

VOC (ppm)

0.5 ppm

No

0.00 to 0.03

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

W01A00002173

VOC (ppm)

0.5 ppm

No

0.00 to 0.00

0.00

W01A00002182

VOC (ppm)

0.5 ppm

No

0.00 to 0.01

0.00

W01B00002164

VOC (ppm)

0.5 ppm

No

0.00 to 0.00

0.00

W01B00002162

VOC (ppm)

0.5 ppm

No

0.00 to 0.01

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

W01B00002222

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

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.

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.

Abbreviations:

mg/m - 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


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x Gould

W Martinet

East Palestine
Cemetery

Jimtown

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Plot for [YNGl YOUNGS-OWN

Generated: 28 Mar 2023

Gamelands N

Summary
,>*"	Obs Used: 36

Obs Without Wind: 0
Avg Speed: 18.0 mph

It

TETRA TECH

Prepared By: TetraTech Inc.

Figure 1

Continuous Air Monitoring
Community Stations

Legend

0 Continuous Air Monitoring Locations with DustTrak
[¦"] Continuous Air Monitoring Locations

h Derailment Location

One Mile Radius

Reference Map

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

Date Saved: 3/24/2023


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