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 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 ------- 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 ------- 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 ------- |