Table 1 Roving Air Monitoring Results Summary Table East Palestine Derailment Emergency Response East Palestine, Ohio Monitoring Period: 02/26/2023 08:07 to 02/26/2023 17:46 Location Date/Time LEL (%) CO (ppm) H2S (ppm) VOC (ppm) PM2 5 (mg/m3)1 PM10 (mg/m3)1 Screening Levels 5% 9 ppm 0.1 ppm 0.5 ppm 0.035 mg/m3 (24-hour TWA) 0.035 mg/m3 (24-hour TWA) PCR-N-03 2/26/2023 11:29 0 0 0 0 0.023 0.023 2/26/2023 17:46 0 0 0 0 0.014 0.015 PCR-N-04 2/26/2023 10:07 0 0 0 0 0.024 0.025 2/26/2023 15:23 0 0 0 0 0.015 0.015 PCR-N-05 2/26/2023 8:16 0 0 0 0 0.033 0.033 2/26/2023 13:17 0 0 0 0 0.022 0.027 PCR-N-06 2/26/2023 10:18 0 0 0 0 0.023 0.023 2/26/2023 15:36 0 0 0 0 0.015 0.015 PCR-N-07 2/26/2023 11:06 0 0 0 0 0.023 0.025 2/26/2023 16:42 0 0 0 0 0.012 0.013 PCR-N-08 2/26/2023 10:56 0 0 0 0 0.023 0.023 2/26/2023 16:31 0 0 0 0 0.012 0.013 PCR-N-09 2/26/2023 10:43 0 0 0 0 0.022 0.023 2/26/2023 16:08 0 0 0 0 0.012 0.013 PCR-N-10 2/26/2023 8:07 0 0 0 0 0.022 0.022 2/26/2023 13:01 0 0 0 0 0.019 0.02 PCR-N-11 2/26/2023 9:42 0 0 0 0 0.025 0.026 2/26/2023 14:54 0 0 0 0 0.017 0.017 PCR-N-12 2/26/2023 9:52 0 0 0 0 0.022 0.022 2/26/2023 15:08 0 0 0 0 0.015 0.016 PCR-N-13 2/26/2023 10:28 0 0 0 0 0.024 0.024 2/26/2023 15:47 0 0 0 0 0.014 0.014 PCR-S-01 2/26/2023 8:50 0 0 0 0 0.035 0.041 2/26/2023 13:49 0 0 0 0 0.018 0.019 PCR-S-04 2/26/2023 11:39 0 0 0 0 0.021 0.022 2/26/2023 17:02 0 0 0 0 0.016 0.017 PCR-S-05 2/26/2023 11:49 0 0 0 0 0.023 0.023 See notes on last page. ------- Table 1 Roving Air Monitoring Results Summary Table East Palestine Derailment Emergency Response East Palestine, Ohio Monitoring Period: 02/26/2023 08:07 to 02/26/2023 17:46 LEL (%) CO (ppm) H2S (ppm) VOC (ppm) PM2 5 (mg/m3)1 PM10 (mg/m3)1 Location Date/Time Screening Levels 5% 9 ppm 0.1 ppm 0.5 ppm 0.035 mg/m3 (24-hour TWA) 0.035 mg/m3 (24-hour TWA) PCR-S-05 2/26/2023 17:17 0 0 0 0 0.013 0.013 PCR-S-06 2/26/2023 8:39 0 0 0 0 0.028 0.028 2/26/2023 13:39 0 0 0 0 0.018 0.022 PCR-S-07 2/26/2023 9:00 0 0 0 0 0.029 0.029 2/26/2023 13:58 0 0 0 0 0.02 0.02 PCR-S-08 2/26/2023 8:27 0 0 0 0 0.028 0.03 2/26/2023 13:27 0 0 0 0 0.019 0.02 PCR-S-09 2/26/2023 11:57 0 0 0 0 0.023 0.024 2/26/2023 17:31 0 0 0 0 0.014 0.015 PCR-S-10 2/26/2023 11:13 0 0 0 0 0.023 0.025 2/26/2023 16:55 0 0 0 0 0.013 0.013 PCR-S-14 2/26/2023 9:27 0 0 0 0 0.028 0.028 2/26/2023 14:37 0 0 0 0 0.018 0.02 PCR-S-15 2/26/2023 9:19 0 0 0 0 0.028 0.031 2/26/2023 14:27 0 0 0 0 0.017 0.021 PCR-S-16 2/26/2023 9:09 0 0 0 0 0.032 0.032 2/26/2023 14:17 0 0 0 0 0.077 0.091 See notes on last page. ------- Table 1 Roving Air Monitoring Results Summary Table East Palestine Derailment Emergency Response East Palestine, Ohio Monitoring Period: 02/26/2023 08:07 to 02/26/2023 17:46 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 Pond VcCture E Gi\W St State Line Lake E Mart// St artin S E,Clark St E Taggart St Alice St 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: 2/27/2023 ------- |