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LEL (%)

CO (ppm)

H2S (ppm)

VOC (ppm)

PM2 5 (mg/m3)1

PM10 (mg/m3)1

HCN (ppm)*

Location

Date/Time

Screening Levels





5%

9 ppm

0.1 ppm

0.5 ppm

0.035 mg/m3

0.035 mg/m3

1 ppm

PCR-N-03

3/6/2023 7:54

0

0

0

0

0.017

0.021

0



3/6/2023 12:00

0

0

0

0

0.012

0.015

0

PCR-N-04

3/6/2023 8:34

0

0

0

0

0.018

0.019

0



3/6/2023 13:08

0

0

0

0

0.017

0.024

0

PCR-N-05

3/6/2023 8:38

0

0

0

0

0.015

0.019

0



3/6/2023 13:15

0

0

0

0

0.008

0.01

0

PCR-N-06

3/6/2023 8:24

0

0

0

0

0.015

0.021

0



3/6/2023 12:32

0

0

0

0

0.012

0.012

0

PCR-N-07

3/6/2023 8:01

0

0

0

0

0.016

0.02

0



3/6/2023 12:06

0

0

0

0

0.011

0.011

0

PCR-N-08

3/6/2023 8:05

0

0

0

0

0.01

0.01

0



3/6/2023 12:10

0

0

0

0

0.007

0.007

0

PCR-N-09

3/6/2023 8:11

0

0

0

0

0.015

0.016

0



3/6/2023 12:16

0

0

0

0

0.009

0.009

0

PCR-N-10

3/6/2023 8:19

0

0

0

0

0.015

0.015

0



3/6/2023 12:28

0

0

0

0

0.009

0.009

0

PCR-N-11

3/6/2023 8:50

0

0

0

0

0.013

0.013

0



3/6/2023 13:20

0

0

0

0

0.006

0.006

0

PCR-N-12

3/6/2023 8:43

0

0

0

0

0.018

0.019

0



3/6/2023 13:26

0

0

0

0

0.006

0.006

0

PCR-N-13

3/6/2023 8:29

0

0

0

0

0.016

0.018

0



3/6/2023 13:00

0

0

0

0

0.008

0.009

0

PCR-S-01

3/6/2023 9:31

0

0

0

0

0.012

0.012

0

PCR-S-04

3/6/2023 10:49

0

0

0

0

0.016

0.016

0



3/6/2023 15:02

0

0

0

0

0.007

0.009

0

PCR-S-05

3/6/2023 10:43

0

0

0

0

0.008

0.009

0



3/6/2023 14:46

0

0

0

0

0.008

0.01

0

PCR-S-06

3/6/2023 10:34

0

0

0

0

0.008

0.008

0



3/6/2023 14:35

0

0

0

0

0.007

0.007

0

PCR-S-07

3/6/2023 9:27

0

0

0

0

0.017

0.023

0



3/6/2023 14:13

0

0

0

0

0.007

0.008

0

Table 1

Roving Air Monitoring Results Summary Table
East Palestine Derailment Emergency Response
East Palestine, Ohio
Monitoring Period: 03/06/2023 07:47 to 03/06/2023 15:09


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Table 1

Roving Air Monitoring Results Summary Table
East Palestine Derailment Emergency Response
East Palestine, Ohio
Monitoring Period: 03/06/2023 07:47 to 03/06/2023 15:09

PCR-S-08

3/6/2023 9:22

0

0

0

0

0.012

0.013

0



3/6/2023 14:09

0

0

0

0

0.012

0.02

0

PCR-S-09

3/6/2023 10:57

0

0

0

0

0.009

0.011

0



3/6/2023 15:09

0

0

0

0

0.006

0.006

0

PCR-S-10

3/6/2023 7:47

0

0

0

0

0.019

0.025

0



3/6/2023 11:54

0

0

0

0

0.007

0.008

0

PCR-S-14

3/6/2023 8:59

0

0

0

0

0.02

0.022

0



3/6/2023 13:42

0

0

0

0

0.008

0.008

0

PCR-S-15

3/6/2023 9:12

0

0

0

0

0.019

0.022

0



3/6/2023 13:56

0

0

0

0

0.011

0.021

0

PCR-S-16

3/6/2023 9:16

0

0

0

0

0.016

0.016

0



3/6/2023 14:01

0

0

0

0

0.008

0.008

0

See notes on last page.
Notes:

Highlighted indicate detections above screening levels

Grey cells indicate no measurement was collected for that specific parameter

1	- Site-Specific Public Health Screening Levels for particulate matter are based on 24-hour time-weighted averages (TWAs). Fixed discrete monitoring readings are
discrete readings, and so do not represent conditions over a full 24-hour period.

* - the screening level is the instrument's limit of detection.

% - percent

CO - carbon monoxide

H2S - hydrogen sulfide

HCN - hydrogen cyanide

LEL - lower explosive limit

mg/nr" - 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
TWA - time-weighted average
VOC - volatile organic compounds


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x Gould

.

MS§md

VcCtufe Ave

'artin S'

East Palestine
Cemetery

Jimtown

Legend

O Roaming Air Monitoring Locations
A Derailment Location

One Mile Radius

East Palestine Derailment ER Site
75 E Main St
East Palestine, Columbiana County, OH 44413

Figure 1

Roaming Air Monitoring Locations

TETRA TECH

Prepared For: EPA

Prepared By: TetraTech Inc.

Reference Map

Location

Date Saved: 3/6/2023


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