Table 1 Community Continuous Air Monitoring Results East Palestine Derailment Site East Palestine, Columbiana County, Ohio Monitoring Period: 04/30/2023 00:00 through 05/01/2023 09:42 Air Monitoring Instrument: Serial Number Analyte Screening Level1 Screening Level Exceeded? 8-hour Period Concentration Range Average of All 8-hour Periods 8533230503 PM2 5 (mg/m3) 0.035 (mg/m3) No 0.006 to 0.023 0.014 PM10(mg/m3) 0.070 (mg/m3) No 0.007 to 0.026 0.015 8533230504 PM2 5 (mg/m3) 0.035 (mg/m3) No 0.002 to 0.023 0.009 PM10(mg/m3) 0.070 (mg/m3) No 0.002 to 0.025 0.010 W01A00000609 VOC (ppm) 0.5 (ppm) No 0.00 to 0.00 0.00 W01A00002175 VOC (ppm) 0.5 (ppm) No 0.00 to 0.00 0.00 W01A00002181 VOC (ppm) 0.5 (ppm) No 0.00 to 0.00 0.00 W01A00002182 VOC (ppm) 0.5 (ppm) No 0.00 to 0.00 0.00 W01B00002162 VOC (ppm) 0.5 (ppm) No 0.00 to 0.00 0.00 W01B00002164 VOC (ppm) 0.5 (ppm) No 0.00 to 0.00 0.00 W01B00002170 VOC (ppm) 0.5 (ppm) No 0.00 to 0.00 0.00 W01B00002172 VOC (ppm) 0.5 (ppm) No 0.00 to 0.00 0.00 W01B00002181 VOC (ppm) 0.5 (ppm) No 0.00 to 0.00 0.00 W01B00002183 VOC (ppm) 0.5 (ppm) No 0.00 to 0.00 0.00 W01B00002206 VOC (ppm) 0.5 (ppm) No 0.00 to 0.00 0.00 W01B00002208 VOC (ppm) 0.5 (ppm) No 0.00 to 0.00 0.00 W01B00002220 VOC (ppm) 0.5 (ppm) No 0.00 to 0.00 0.00 W01B00002221 VOC (ppm) 0.5 (ppm) No 0.00 to 0.00 0.00 W01B00002222 VOC (ppm) 0.5 (ppm) No 0.00 to 0.00 0.00 W01B00002223 VOC (ppm) 0.5 (ppm) No 0.00 to 0.00 0.00 Notes: 1 Site-Specific Screening Levels stated in the Tetra Tech Air Monitoring and Sampling Plan. 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. Air monitoring measurements have been averaged over a 8-hour time period and summarized above. Air monitoring is not performed during inclement weather conditions/rain and thunderstorms. Abbreviations: mg/m3 - milligrams per meter cubed PM2 5 - Particulate Matter, diameter 2.5 micrometers and smaller PM10 - Particulate Matter, diameter 10 micrometers and smaller ppm - Parts per million S/N - Serial number VOC - Volatile organic compound 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 ------- W .North Ave Gamelands No Jimtown MLBWmMM .'IWOIBOOOQ^IM] W01B00002i72 • ¦ WO1B0QOO2183 ;WQ1B00002208 A/V01AQ0Q02181 IPJMpB00002-206 bW01tBQ0002220 ;W01A00002182 '8533230504 iwMBO0Q0222-l W0TA00002175 EwdMOOQ0O6O9 ¦8533230503m Mb;00002170 W01B00002222 Plot for IYNG1 YOUNGSTOWN Generated: 04 May 2023 It TETRA TECH Prepared By: TetraTech Inc. Figure 1 Continuous Air Monitoring Community Stations Legend 0 Continuous Air Monitoring Locations with DustTrak [¦"] Continuous Air Monitoring Locations One Mile Radius Derailment Location East Palestine Derailment ER Site East Palestine, Columbiana County, OH 44413 Reference Map Miles Summary ObsUsed:33 Obs Without Wind: 0 Avg Speed: 9.1 mph Date Saved: 5/4/2023 ------- |