Table 1 Roving Air Monitoring Results Summary Table East Palestine Derailment Emergency Response East Palestine, Ohio Monitoring Period: 03/03/2023 08:17 to 03/03/2023 18:14 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 03/03/2023 08:29 0 0 0 0.01 0.028 0.031 0 03/03/2023 12:59 0 0 0 0 0.018 0.018 0.5 03/03/2023 16:43 0 0 0 0 0.004 0.006 PCR-N-04 03/03/2023 09:45 0 0 0 0 0.023 0.027 0 03/03/2023 13:40 0 0 0 0 0.019 0.02 0 03/03/2023 18:08 0 0 0 0.01 0.005 0.006 PCR-N-05 03/03/2023 09:56 0 0 0 0 0.024 0.025 03/03/2023 13:47 0 0 0 0 0.018 0.018 0 03/03/2023 18:14 0 0 0 0.02 0.003 0.003 PCR-N-06 03/03/2023 09:29 0 0 0 0 0.025 0.025 0 03/03/2023 13:27 0 0 0 0 0.018 0.021 0 03/03/2023 17:44 0 0 0 0.02 0.002 0.002 PCR-N-07 03/03/2023 08:38 0 0 0 0.01 0.027 0.029 i) 03/03/2023 13:04 0 0 0 0 0.016 0.02 i) 03/03/2023 16:51 0 0 0 0 0.005 0.006 PCR-N-08 03/03/2023 08:50 0 0 0 0.01 0.025 0.026 0 03/03/2023 13:13 0 0 0 0 0.017 0.018 0 03/03/2023 17:19 0 0 0 0 0.002 0.002 PCR-N-09 03/03/2023 09:03 0 0 0 0.01 0.025 0.025 1) 03/03/2023 13:20 0 0 0 0 0.017 0.017 1) 03/03/2023 17:26 0 0 0 0.02 0.001 0.001 PCR-N-10 03/03/2023 09:33 0 0 0 0 0.022 0.023 0 03/03/2023 13:38 0 0 0 0 0.018 0.02 0 03/03/2023 17:55 0 0 0 10 0.003 0.003 PCR-N-11 03/03/2023 10:08 0 0 0 0 0.022 0.022 0 03/03/2023 14:02 0 0 0 0 0.016 0.019 0 PCR-N-12 03/03/2023 10:16 0 0 0 0 0.02 0.022 0 03/03/2023 14:12 0 0 0 0 0.018 0.021 0 PCR-N-13 03/03/2023 09:12 0 0 0 0 0.027 0.027 0 03/03/2023 13:26 0 0 0 0 0.017 0.02 0 03/03/2023 17:35 0 0 0 0.02 0.002 0.002 PCR-S-01 03/03/2023 11:14 0 0 0 0 0.024 0.021 0 ------- Roving Air Monitoring Results Summary Table East Palestine Derailment Emergency Response East Palestine, Ohio Monitoring Period: 03/03/2023 08:17 to 03/03/2023 18:14 LEL (%) CO (ppm) H2S (ppm) VOC (ppm) PMj.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-S-01 03/03/2023 15:03 0 0 0 0 0.014 0.019 0 PCR-S-04 03/03/2023 11:40 0 0 0 0 0.02 0.02 0 03/03/2023 16:13 0 0 0 0 0.003 0.003 PCR-S-05 03/03/2023 11:32 0 0 0 0 0.019 0.021 0 03/03/2023 15:21 0 0 1) 0.013 0.013 0 03/03/2023 16:09 0 PCR-S-06 03/03/2023 11:16 0 0 0 0 U.U19 0.024 o 03/03/2023 15:07 0 0 0 0 0.015 0.019 0 PCR-S-07 03/03/2023 11:04 0 0 0 0 0.025 0.028 0 03/03/2023 15:13 0 0 0 0 0.013 0.013 0 PCR-S-08 03/03/2023 11:03 0 0 0 0 0.027 0.027 0 03/03/2023 14:54 0 0 0 0 0.019 0.02 0 PCR-S-09 03/03/2023 11:46 0 0 0 0 0.017 0.019 0 03/03/2023 16:20 0 0 0 0 0.004 0.004 PCR-S-10 03/03/2023 08:17 0 0 0 0 0.024 0.024 0 03/03/2023 12:41 0 0 0 0 0.02 0.021 0 03/03/2023 16:31 0 0 0 0 0.004 0.005 PCR-S-14 03/03/2023 10:38 0 0 0 0 0.02 0.03 0 03/03/2023 14:28 0 0 0 0 0.02 0.02 0 PCR-S-15 03/03/2023 10:56 0 0 0 0 0.02 0.021 0 03/03/2023 14:35 0 0 0 0 0.016 0.019 0 PCR-S-16 03/03/2023 10:34 0 0 0 0 0.022 0.027 0 03/03/2023 14:21 0 0 0 0 0.021 0.021 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 ------- Roving Air Monitoring Results Summary Table East Palestine Derailment Emergency Response East Palestine, Ohio Monitoring Period: 03/03/2023 08:17 to 03/03/2023 18:14 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 ------- 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: 3/2/2023 ------- |