Table 1 Roving Air Monitoring Results Summary Table East Palestine Derailment Emergency Response East Palestine, Ohio Monitoring Period: 02/10/2023 03:00 to 02/10/2023 06:13 Date/Time o2 (%) LEL (%) CO (ppm) H2S (ppm) VOC (ppm) PM2 5 (mg/m3) PM10 (mg/m3) HCN (ppm)* Benzene (ppm) Phosgene (ppm) HC1 (ppm) Screening Levels 19.5% to 23.5% 5% 25 ppm 0.1 ppm 0.5 ppm 0.025 mg/m3 0.05 mg/m3 0.5 ppm 0.5 ppm 0.04 ppm 1.8 ppm 2/10/2023 3:00 20.9 0 0 0 0 0.005 0.005 0 0 0 2/10/2023 3:04 20.9 0 0 0 0 0.005 0.005 0 0 0 2/10/2023 3:11 20.9 0 0 0 0 0.008 0.008 0 0 0 2/10/2023 3:17 20.9 0 0 0 0 0.006 0.009 0 0 0 2/10/2023 3:25 20.9 0 0 0 0 0.02 0.02 0 0 0 2/10/2023 3:38 20.9 0 0 0 0 0.003 0.003 0 0 0 2/10/2023 3:43 20.9 0 0 0 0 0.003 0.003 0 0 0 2/10/2023 3:47 20.9 0 0 0 0 0.003 0.003 0 0 0 2/10/2023 3:52 20.9 0 0 0 0 0.003 0.003 0 0 0 2/10/2023 4:00 20.9 0 0 0 0 0.003 0.003 0 0 0 2/10/2023 4:07 20.9 0 0 0 0 0.006 0.006 0 0 0 2/10/2023 4:17 20.9 0 0 0 0 0.004 0.006 0 0 0 2/10/2023 4:28 20.9 0 0 0 0 0.004 0.004 0 0 0 2/10/2023 4:38 20.9 0 0 0 0 0.005 0.005 0 0 0 2/10/2023 4:47 20.9 0 0 0 0 0.005 0.005 0 0 0 2/10/2023 4:50 20.9 0 0 0 0 0.006 0.01 0 0 0 2/10/2023 5:22 20.9 0 0 0 0 0.005 0.005 0 0 0 2/10/2023 5:26 20.9 0 0 0 0 0.01 0.013 0 0 0 2/10/2023 5:38 20.9 0 0 0 0 0.005 0.005 0 0 0 2/10/2023 6:02 20.9 0 0 0 0 0.007 0.007 0 0 0 2/10/2023 6:04 20.9 0 0 0 0 0.008 0.008 0 0 0 2/10/2023 6:13 20.9 0 0 0 0 0.008 0.01 0 0 0 Notes: Highlighted indicate detections above screening levels Grey cells indicate no measurement was collected for that specific parameter * - the screening level is the instrument's limit of detection. % - percent CI - chlorine CO - carbon monoxide H2S - hydrogen sulfide HC1 - hydrogen chloride HCN -hydrogen cyanide LEL - lower explosive limit mg/m3 - 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 VOC - volatile organic compounds ------- E Tagg? ' St ast PaleiOineifO ' £ t P?~. , \ ^ A ji 4&>«B BF ^uHHp *• »' if jpt?w Jimtown Reference Map Location Legend A Derailment Location One Mile Radius ® Roaming Air Monitoring Locations Miles East Palestine Derailment ER Site 75 E Main St East Palestine, Columbiana County, OH 44413 Figure 1 Roaming Air Monitoring Locations It TETRA TECH Prepared For: EPA Prepared By: Tetra Tech Inc. Date Saved: 2/10/2023 ------- |