Table 1

Community Roving Air Monitoring Results Summary Table
East Palestine Derailment Emergency Response
East Palestine, Ohio
Monitoring Period: 05/04/2023 08:28 to 05/04/2023 16:01





VOC (ppm)

PM2 5 (mg/m3)1

PM10 (mg/m3)1

Location

Date/Time

Screening Levels





0.5 ppm

0.035 mg/m3

0.070 mg/m3

PCR-N-03

5/4/2023 8:35

0

0.006

0.008



5/4/2023 11:19

0

0.007

0.011



5/4/2023 15:56

0

0.003

0.005

PCR-N-04

5/4/2023 9:12

0

0.008

0.014



5/4/2023 13:58

0

0.003

0.004

PCR-N-05

5/4/2023 9:19

0

0.005

0.005



5/4/2023 14:09

0

0.003

0.004

PCR-N-06

5/4/2023 9:04

0

0.004

0.005



5/4/2023 11:50

0

0.005

0.006

PCR-N-07

5/4/2023 8:40

0

0.005

0.005



5/4/2023 11:25

0

0.005

0.006



5/4/2023 16:01

0

0.003

0.004

PCR-N-08

5/4/2023 8:44

0

0.004

0.005



5/4/2023 11:30

0

0.004

0.005

PCR-N-09

5/4/2023 8:51

0

0.004

0.005



5/4/2023 11:35

0

0.004

0.004

PCR-N-10

5/4/2023 8:56

0

0.007

0.013



5/4/2023 11:41

0

0.004

0.005

PCR-N-11

5/4/2023 9:26

0

0.005

0.008



5/4/2023 14:16

0

0.002

0.003

PCR-N-12

5/4/2023 9:31

0

0.006

0.008



5/4/2023 14:21

0

0.003

0.004

PCR-N-13

5/4/2023 9:09

0

0.008

0.016



5/4/2023 13:53

0

0.006

0.013

PCR-S-01

5/4/2023 11:07

0

0.004

0.004



5/4/2023 15:45

0

0.003

0.004

PCR-S-04

5/4/2023 10:53

0

0.004

0.006



5/4/2023 15:28

0

0.003

0.005

PCR-S-05

5/4/2023 10:24

0

0.006

0.01



5/4/2023 15:21

0

0.003

0.003

PCR-S-06

5/4/2023 10:13

0

0.003

0.004



5/4/2023 15:15

0

0.003

0.005

PCR-S-07

5/4/2023 10:07

0

0.005

0.01



5/4/2023 15:06

0

0.009

0.024

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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Table 1

Community Roving Air Monitoring Results Summary Table
East Palestine Derailment Emergency Response
East Palestine, Ohio
Monitoring Period: 05/04/2023 08:28 to 05/04/2023 16:01





VOC (ppm)

PM2 5 (mg/m3)1

PM10 (mg/m3)1

Location

Date/Time

Screening Levels





0.5 ppm

0.035 mg/m3

0.070 mg/m3

PCR-S-08

5/4/2023 9:40

0

0.012

0.024



5/4/2023 14:30

0

0.004

0.006

PCR-S-09

5/4/2023 10:28

0

0.009

0.019



5/4/2023 15:25

0

0.003

0.004

PCR-S-10

5/4/2023 8:28

0

0.004

0.005



5/4/2023 11:14

0

0.004

0.005



5/4/2023 15:51

0

0.002

0.003

PCR-S-14

5/4/2023 9:49

0

0.003

0.006



5/4/2023 14:45

0

0.004

0.006

PCR-S-15

5/4/2023 9:53

0

0.004

0.007



5/4/2023 14:53

0

0.002

0.003

PCR-S-16

5/4/2023 9:58

0

0.013

0.025



5/4/2023 14:58

0

0.004

0.005


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Table 1

Community Roving Air Monitoring Results Summary Table
East Palestine Derailment Emergency Response
East Palestine, Ohio
Monitoring Period: 05/04/2023 08:28 to 05/04/2023 16:01

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. 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.

mg/m - milligrams per cubic meter

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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Legend

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





Figure 1

Roaming Air Monitoring

Community Locations





TETRA TECH

Prepared For: EPA

Prepared By: TetraTech Inc.

Reference Map

Location

Date Saved: 5/4/2023


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