Table 1 Roving Air Monitoring Results Summary Table East Palestine Derailment Emergency Response East Palestine, Ohio Monitoring Period: 03/07/2023 07:55 to 03/07/2023 11:26 We are in the process of ensuring this document is accessible to all audiences. If you need assistance accessing this document, or any material on the EPA East Palestine, Ohio emergency response webpages, please contact the Region 5 Public Information Officer on-call at: R5_EastPalestine@epa. gov Location Date/Time LEL (%) CO (ppm) H2S (ppm) VOC (ppm) PM2 5 (mg/m3)1 PM10 (mg/m3)1 HCN (ppm)* Screening Levels 5% 9 ppm 0.1 ppm 0.5 ppm 0.035 mg/m3 0.035 mg/m3 1 ppm PCR-N-03 3/7/2023 8:05 0 0 0 0 0.005 0.005 0 PCR-N-04 3/7/2023 8:49 0 0 0 0 0.008 0.008 0 PCR-N-05 3/7/2023 8:53 0 0 0 0 0.006 0.007 0 PCR-N-06 3/7/2023 8:37 0 0 0 0 0.006 0.006 0 PCR-N-07 3/7/2023 8:11 0 0 0 0 0.005 0.005 0 PCR-N-08 3/7/2023 8:19 0 0 0 0 0.007 0.008 0 PCR-N-09 3/7/2023 8:25 0 0 0 0 0.007 0.007 0 PCR-N-10 3/7/2023 8:31 0 0 0 0 0.006 0.006 0 PCR-N-11 3/7/2023 9:25 0 0 0 0 0.011 0.011 0 PCR-N-12 3/7/2023 9:18 0 0 0 0 0.01 0.01 0 PCR-N-13 3/7/2023 8:42 0 0 0 0 0.007 0.008 0 PCR-S-01 3/7/2023 11:26 0 0 0 0 0.005 0.005 0 PCR-S-04 3/7/2023 10:59 0 0 0 0 0.004 0.004 0 PCR-S-05 3/7/2023 10:53 0 0 0 0 0.005 0.006 0 PCR-S-06 3/7/2023 10:41 0 0 0 0 0.007 0.008 0 PCR-S-07 3/7/2023 10:31 0 0 0 0 0.009 0.011 0 PCR-S-08 3/7/2023 9:55 0 0 0 0 0.012 0.013 0 PCR-S-09 3/7/2023 11:06 0 0 0 0 0.006 0.006 0 PCR-S-10 3/7/2023 7:55 0 0 0 0 0.006 0.007 0 PCR-S-14 3/7/2023 9:40 0 0 0 0 0.011 0.011 0 PCR-S-15 3/7/2023 9:44 0 0 0 0 0.013 0.013 0 PCR-S-16 3/7/2023 9:49 0 0 0 0 0.012 0.012 0 See notes on last page. ------- Table 1 Roving Air Monitoring Results Summary Table East Palestine Derailment Emergency Response East Palestine, Ohio Monitoring Period: 03/07/2023 07:55 to 03/07/2023 11:26 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 jIVIailMjS 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: 3/7/2023 ------- |