Table 1 Community Roving Air Monitoring Results Summary Table East Palestine Derailment Emergency Response East Palestine, Ohio Monitoring Period: 03/25/2023 09:02 to 03/25/2023 16:44 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-N-03 3/25/2023 9:07 0 0.006 0.006 3/25/2023 14:10 0 0.001 0.002 PCR-N-04 3/25/2023 9:51 0 0.016 0.016 3/25/2023 14:47 0 0.003 0.005 PCR-N-05 3/25/2023 9:56 0 0.007 0.008 3/25/2023 14:52 0 0.007 0.014 PCR-N-06 3/25/2023 9:41 0 0.007 0.007 3/25/2023 12:44 0 0.006 0.008 3/25/2023 14:37 0 0.002 0.003 PCR-N-07 3/25/2023 9:19 0 0.007 0.007 3/25/2023 14:14 0 0.001 0.002 PCR-N-08 3/25/2023 9:23 0 0.006 0.006 3/25/2023 14:19 0 0.001 0.001 PCR-N-09 3/25/2023 9:30 0 0.008 0.008 3/25/2023 14:25 0 0.001 0.002 PCR-N-10 3/25/2023 9:35 0 0.007 0.007 3/25/2023 14:31 0 0.002 0.002 PCR-N-11 3/25/2023 10:01 0 0.005 0.006 3/25/2023 15:06 0 0.001 0.002 PCR-N-12 3/25/2023 10:05 0 0.005 3/25/2023 15:20 0 0.001 0.002 PCR-N-13 3/25/2023 9:45 0 0.006 0.007 3/25/2023 14:42 0 0.002 0.004 PCR-S-01 3/25/2023 13:15 0 0.006 0.007 3/25/2023 16:44 0 0.003 0.004 PCR-S-04 3/25/2023 13:09 0 0.006 0.007 3/25/2023 16:24 0 0.003 0.003 PCR-S-05 3/25/2023 12:55 0 0.007 0.01 3/25/2023 16:11 0 0.006 0.006 PCR-S-06 3/25/2023 16:03 0 0.009 0.016 PCR-S-07 3/25/2023 12:35 0 0.009 0.009 3/25/2023 15:58 0 0.005 0.01 PCR-S-08 3/25/2023 10:10 0 0.006 0.006 3/25/2023 15:27 0 0.001 0.002 PCR-S-09 3/25/2023 13:03 0 0.006 0.006 3/25/2023 16:19 0 0.002 0.004 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: 03/25/2023 09:02 to 03/25/2023 16:44 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-10 3/25/2023 9:02 0 0.008 0.013 3/25/2023 14:05 0 0.002 0.002 PCR-S-14 3/25/2023 10:19 0 0.006 3/25/2023 15:34 0 0.001 0.002 PCR-S-15 3/25/2023 10:27 0 0.005 0.005 3/25/2023 15:41 0 0.004 0.006 PCR-S-16 3/25/2023 10:30 0 0.011 0.013 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. * - the screening level is the instrument's limit of detection. 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 * TtiElpnd A?cCtuf® Avo Sfafe Line Lake MartiflSt | art in S ,9flart Rd E [Clark St Alice; St State Gamelands No 285 Jimtown Legend A Derailment Location One Mile Radius O Roaming Air Monitoring Locations 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: 3/25/2023 ------- |