Table 1

Roving Air Monitoring Results Summary Table
East Palestine Derailment Emergency Response
East Palestine, Ohio
Monitoring Period: 03/07/2023 07:55 to 03/07/2023 11:26

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Location

Date/Time

LEL (%)

CO (ppm)

H2S (ppm)

VOC (ppm)

PM2 5 (mg/m3)1

PM10 (mg/m3)1

HCN (ppm)*

Screening Levels

5%

9 ppm

0.1 ppm

0.5 ppm

0.035 mg/m3

0.035 mg/m3

1 ppm

PCR-N-03

3/7/2023 8:05

0

0

0

0

0.005

0.005

0

PCR-N-04

3/7/2023 8:49

0

0

0

0

0.008

0.008

0

PCR-N-05

3/7/2023 8:53

0

0

0

0

0.006

0.007

0

PCR-N-06

3/7/2023 8:37

0

0

0

0

0.006

0.006

0

PCR-N-07

3/7/2023 8:11

0

0

0

0

0.005

0.005

0

PCR-N-08

3/7/2023 8:19

0

0

0

0

0.007

0.008

0

PCR-N-09

3/7/2023 8:25

0

0

0

0

0.007

0.007

0

PCR-N-10

3/7/2023 8:31

0

0

0

0

0.006

0.006

0

PCR-N-11

3/7/2023 9:25

0

0

0

0

0.011

0.011

0

PCR-N-12

3/7/2023 9:18

0

0

0

0

0.01

0.01

0

PCR-N-13

3/7/2023 8:42

0

0

0

0

0.007

0.008

0

PCR-S-01

3/7/2023 11:26

0

0

0

0

0.005

0.005

0

PCR-S-04

3/7/2023 10:59

0

0

0

0

0.004

0.004

0

PCR-S-05

3/7/2023 10:53

0

0

0

0

0.005

0.006

0

PCR-S-06

3/7/2023 10:41

0

0

0

0

0.007

0.008

0

PCR-S-07

3/7/2023 10:31

0

0

0

0

0.009

0.011

0

PCR-S-08

3/7/2023 9:55

0

0

0

0

0.012

0.013

0

PCR-S-09

3/7/2023 11:06

0

0

0

0

0.006

0.006

0

PCR-S-10

3/7/2023 7:55

0

0

0

0

0.006

0.007

0

PCR-S-14

3/7/2023 9:40

0

0

0

0

0.011

0.011

0

PCR-S-15

3/7/2023 9:44

0

0

0

0

0.013

0.013

0

PCR-S-16

3/7/2023 9:49

0

0

0

0

0.012

0.012

0

See notes on last page.


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Table 1

Roving Air Monitoring Results Summary Table
East Palestine Derailment Emergency Response
East Palestine, Ohio
Monitoring Period: 03/07/2023 07:55 to 03/07/2023 11:26

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/m - 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
Pond

VcCture

E Gi\W St

State Line
Lake

E Mart// St

artin S

E,Clark St

E Taggart St

Alice st
jIVIailMjS

State
Gamelands No
285

Jimtown

Legend

East Palestine Derailment ER Site



75 E Main St

O Roaming Air Monitoring Locations

East Palestine, Columbiana County, OH 44413

A Derailment Location





Figure 1

One Mile Radius

Roaming Air Monitoring Locations





lb

TETRA TECH



Prepared For: EPA

Prepared By: TetraTech Inc.

Reference Map

Site

Location

Date Saved: 3/7/2023


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