Table 1 Community Continuous Air Monitoring Results East Palestine Derailment Site East Palestine, Columbiana County, Ohio Monitoring Period: 03/02/2023 00:00 to 03/02/2023 23:59 Air Monitoring Instrument Serial Number Analyte Screening Level1 Screening Level Exceeded? 8-hour Period Concentration Range Average of All 8-hour Periods W01A00001706 VOC (ppm) 0.5 ppm No 0.00 to 0.00 0.00 CO (ppm) 9 ppm No 0.00 to 0.00 0.00 H2S (ppm) 0.1 ppm No 0.0 to 0.0 0.00 LEL (%) >5% No 0.0 to 0.0 0.0 W01A00001710 VOC (ppm) 0.5 ppm No 0.00 to 0.01 0.00 CO (ppm) 9 ppm No 0.00 to 0.00 0.00 H2S (ppm) 0.1 ppm No 0.0 to 0.0 0.00 LEL (%) >5% No 0.0 to 0.0 0.0 W01B00002162 VOC (ppm) 0.5 ppm No 0.00 to 0.00 0.00 CO (ppm) 9 ppm No 0.00 to 0.00 0.00 H2S (ppm) 0.1 ppm No 0.0 to 0.0 0.00 LEL (%) >5% No 0.0 to 0.0 0.0 W01B00002164 VOC (ppm) 0.5 ppm No 0.00 to 0.00 0.00 CO (ppm) 9 ppm No 0.00 to 0.00 0.00 H2S (ppm) 0.1 ppm No 0.0 to 0.0 0.00 LEL (%) >5% No 0.0 to 0.0 0.0 W01B00002170 VOC (ppm) 0.5 ppm No 0.00 to 0.00 0.00 CO (ppm) 9 ppm No 0.00 to 0.01 0.00 H2S (ppm) 0.1 ppm No 0.0 to 0.0 0.00 LEL (%) >5% No 0.0 to 0.0 0.0 W01B00002172 VOC (ppm) 0.5 ppm No 0.00 to 0.00 0.00 CO (ppm) 9 ppm No 0.00 to 0.00 0.00 H2S (ppm) 0.1 ppm No 0.0 to 0.0 0.00 HCN (ppm) 1 ppm No 0.0 to 0.0 0.0 LEL (%) >5% No 0.0 to 0.0 0.0 W01B00002181 VOC (ppm) 0.5 ppm No 0.00 to 0.00 0.00 CO (ppm) 9 ppm No 0.00 to 0.00 0.00 H2S (ppm) 0.1 ppm No 0.0 to 0.0 0.00 LEL (%) >5% No 0.0 to 0.0 0.0 W01B00002183 VOC (ppm) 0.5 ppm No 0.00 to 0.00 0.00 CO (ppm) 9 ppm No 0.00 to 0.00 0.00 H2S (ppm) 0.1 ppm No 0.0 to 0.0 0.00 HCN (ppm) 1 ppm No 0.0 to 0.0 0.0 LEL (%) >5% No 0.0 to 0.0 0.0 W01B00002206 VOC (ppm) 0.5 ppm No 0.00 to 0.00 0.00 CO (ppm) 9 ppm No 0.00 to 0.00 0.00 H2S (ppm) 0.1 ppm No 0.0 to 0.0 0.0 LEL (%) >5% No 0.0 to 0.0 0.0 W01B00002207 VOC (ppm) 0.5 ppm No 0.00 to 0.00 0.00 CO (ppm) 9 ppm No 0.00 to 0.00 0.00 H2S (ppm) 0.1 ppm No 0.0 to 0.0 0.00 LEL (%) >5% No 0.0 to 0.0 0.0 W01B00002208 VOC (ppm) 0.5 ppm No 0.00 to 0.00 0.00 CO (ppm) 9 ppm No 0.00 to 0.00 0.00 H2S (ppm) 0.1 ppm No 0.0 to 0.0 0.00 LEL (%) >5% No 0.0 to 0.0 0.0 W01B00002220 VOC (ppm) 0.5 ppm No 0.00 to 0.00 0.00 CO (ppm) 9 ppm No 0.00 to 0.00 0.00 H2S (ppm) 0.1 ppm No 0.0 to 0.0 0.00 LEL (%) >5% No 0.0 to 0.0 0.0 ------- Table 1 Community Continuous Air Monitoring Results East Palestine Derailment Site East Palestine, Columbiana County, Ohio Monitoring Period: 03/02/2023 00:00 to 03/02/2023 23:59 Air Monitoring Instrument Serial Number Analyte Screening Level1 Screening Level Exceeded? 8-hour Period Concentration Range Average of All 8-hour Periods W01B00002221 VOC (ppm) 0.5 ppm No 0.00 to 0.00 0.00 CO (ppm) 9 ppm No 0.00 to 0.00 0.00 H2S (ppm) 0.1 ppm No 0.0 to 0.0 0.00 LEL (%) >5% No 0.0 to 0.0 0.0 W01B00002222 VOC (ppm) 0.5 ppm No 0.00 to 0.00 0.00 CO (ppm) 9 ppm No 0.00 to 0.00 0.00 H2S (ppm) 0.1 ppm No 0.0 to 0.0 0.00 LEL (%) >5% No 0.0 to 0.0 0.0 W01B00002223 VOC (ppm) 0.5 ppm No 0.00 to 0.00 0.00 CO (ppm) 9 ppm No 0.00 to 0.00 0.00 H2S (ppm) 0.1 ppm No 0.0 to 0.0 0.00 LEL (%) >5% No 0.0 to 0.0 0.0 Notes: 1 Site-Specific Action Level stated in the Tetra Tech Air Monitoring and Sampling Plan. Air monitoring measurements have been averaged over a 8-hour time period and summarized above. Start and stop times for each air monitoring instrument varies. The monitoring period is based on the earliest start time and latest stop time out of all units. Air monitoring is not performed during inclement weather conditions/rain and thunderstorms. < - Less than > - Greater than % - Percent CO - Carbon Monoxide H2S - Hydrogen Sulfide 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 S/N - Serial number VOC - Volatile organic compounds ------- w Martin St Park AvWWi ! * Tf? jjstine *i State Gameiands No 285 r dlCSjlll I1 Cemetery iistown W01B00002164 WWB0Q002223 W01B00002171 W01B000Q2183 VV01A0G001'710 W01B00002208 MMWWmMb W01B00002220 WOl'BOOOO'222-1 WO1BQQ002207 iWQl:A00.0.0H06 Generated: 03 Mar 2023 Summary Obs Used; 35 Obs Without Wind: 0 Avg Speed: 7.8 mph Reference Map Legend E Continuous Air Monitoring Locations | Derailment Location One Mile Radius Miles East Palestine Derailment ER Site 75 E Main St East Palestine, Columbiana County, OH 44413 Figure 1 Continuous Air Monitoring Community Stations TETRA TECH Prepared For: EPA Prepared By: TetraTech Inc. Date Saved: 3/2/2023 ------- |