Table 1 Community Roving Air Monitoring Results Summary Table East Palestine Derailment Emergency Response East Palestine, Ohio Monitoring Period: 04/21/2023 09:47 to 04/21/2023 16:51 Location Date/Time VOC (ppm) PMZ5 (mg/m3)1 PM10 (mg/m3)1 Screening Levels 0.5 ppm 0.035 mg/m3 0.070 mg/m3 PCR-N-03 4/21/2023 10:08 0 4/21/2023 12:55 0 4/21/2023 15:11 0 0.023 0.026 PCR-N-04 4/21/2023 10:28 0.0209 4/21/2023 13:17 0 4/21/2023 15:39 0 0.02 0.024 PCR-N-05 4/21/2023 10:30 4/21/2023 13:19 0 4/21/2023 15:49 0 0.026 0.042 PCR-N-06 4/21/2023 10:23 0.0209 4/21/2023 13:11 0 4/21/2023 15:32 0 0.021 0.025 PCR-N-07 4/21/2023 10:11 0 4/21/2023 12:59 0 4/21/2023 15:14 0 0.02 0.025 PCR-N-08 4/21/2023 10:13 0 4/21/2023 13:02 0 4/21/2023 15:17 0 0.021 0.026 PCR-N-09 4/21/2023 10:17 0 4/21/2023 13:05 0 4/21/2023 15:21 0 0.019 0.022 4/21/2023 15:26 0 0.019 0.021 PCR-N-10 4/21/2023 10:21 0 4/21/2023 13:07 0 PCR-N-11 4/21/2023 10:34 0 4/21/2023 13:23 0 4/21/2023 16:00 0 0.025 0.039 PCR-N-12 4/21/2023 10:37 0 4/21/2023 13:29 0 4/21/2023 16:05 0 0.02 0.024 PCR-N-13 4/21/2023 10:25 0 4/21/2023 13:13 0 4/21/2023 15:35 0 0.027 0.04 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 ------- Table 1 Community Roving Air Monitoring Results Summary Table East Palestine Derailment Emergency Response East Palestine, Ohio Monitoring Period: 04/21/2023 09:47 to 04/21/2023 16:51 VOC (ppm) PMZ5 (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-01 4/21/2023 11:23 0 4/21/2023 14:51 0 4/21/2023 16:51 0 0.02 0.027 PCR-S-04 4/21/2023 11:17 0 4/21/2023 14:42 0 4/21/2023 16:40 0 0.018 0.02 PCR-S-05 4/21/2023 11:15 0 4/21/2023 14:36 0 4/21/2023 16:37 0 0.02 0.027 PCR-S-06 4/21/2023 11:11 0 4/21/2023 14:29 0 4/21/2023 16:32 0 0.022 0.035 PCR-S-07 4/21/2023 11:07 0 4/21/2023 14:23 0 4/21/2023 16:28 0 0.018 0.02 PCR-S-08 4/21/2023 10:44 0 4/21/2023 13:39 0 4/21/2023 16:26 0 0.017 0.021 PCR-S-09 4/21/2023 11:19 0 4/21/2023 14:46 0 4/21/2023 16:47 0 0.019 0.026 PCR-S-10 4/21/2023 9:47 0 4/21/2023 12:53 0 4/21/2023 15:08 0 0.02 0.024 PCR-S-14 4/21/2023 10:50 0 4/21/2023 13:55 0 0.023 0.029 4/21/2023 16:15 0 0.019 0.024 PCR-S-15 4/21/2023 10:53 0 4/21/2023 14:05 0 4/21/2023 16:18 0 0.016 0.019 PCR-S-16 4/21/2023 10:56 0 4/21/2023 14:15 0 4/21/2023 16:21 0 0.023 0.035 ------- Table 1 Community Roving Air Monitoring Results Summary Table East Palestine Derailment Emergency Response East Palestine, Ohio Monitoring Period: 04/21/2023 09:47 to 04/21/2023 16:51 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 ------- t x Gould s TWg/gOnO A?cCtuf® Avo Sfafe Line Lake - E Martp St artin S 9flart Rd Alice; St State Gamelarids No 285 Jimtown Legend O Roaming Air Monitoring Locations Derailment Location One Mile Radius 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: 4/21/2023 ------- |