Table 1 Community Continuous Air Monitoring Results East Palestine Derailment Site East Palestine, Columbiana County, Ohio Monitoring Period: 03/05/2023 00:00 through 03/06/2023 12:18 Air Monitoring Instrument: Serial Number Analyte Screening Level1 Screening Level Exceeded? 8-hour Period Concentration Range Average of All 8-hour Periods 8533230504 PM2 5 (mg/m3) 0.035 mg/m3 Yes 0.007 to 0.094 0.032 PM10(mg/m3) 0.035 mg/m3 Yes 0.007 to 0.096 0.036 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 0.0 W01A00001710 VOC (ppm) 0.5 ppm No 0.00 to 0.13 0.03 CO (ppm) 9 ppm No 0.00 to 0.00 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 0.0 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 0.01 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 W01B00002170 VOC (ppm) 0.5 ppm No 0.00 to 0.05 0.02 CO (ppm) 9 ppm No 0.00 to 0.03 0.01 H2S (ppm) 0.1 ppm No 0.0 to 0.0 0.0 HCN (ppm) 1 ppm No 0.0 to 0.0 0.0 LEL (%) >5% No 0.0 to 0.5 0.2 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 0.0 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 0.0 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 0.0 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 0.03 0.01 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 HCN (ppm) 1 ppm No 0.0 to 0.0 0.0 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 0.0 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: 03/05/2023 00:00 through 03/06/2023 12:18 Air Monitoring Instrument: Serial Number Analyte Screening Level1 Screening Level Exceeded? 8-hour Period Concentration Range Average of All 8-hour Periods W01B00002220 VOC (ppm) 0.5 ppm No 0.00 to 0.01 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 0.0 LEL (%) >5% No 0.0 to 0.0 0.0 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 0.0 W01B00002222 VOC (ppm) 0.5 ppm No 0.00 to 0.00 0.00 CO (ppm) 9 ppm No 0.00 to 0.25 0.09 H2S (ppm) 0.1 ppm No 0.0 to 0.0 0.0 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 0.01 0.00 H2S (ppm) 0.1 ppm 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. Air monitoring is not performed during inclement weather conditions/rain and thunderstorms. Abbreviations: < - Less than > - Greater than % - Percent CO - Carbon Monoxide H2S - Hydrogen Sulfide HCN - Hydrogen Cyanide LEL - Lower Explosive Limit 02 - Oxygen ppm - Parts per million S/N - Serial number VOC - Volatile organic compound ------- i Gould Pond East Paiestme Cemetery iistown iw.Ql1 B0OOQ2^3I W01B00002172J W01B000Q2183 W01A00001'710 W01B00002208 iW0iB0Q002206 W01B00002220' WO10QOOO2221 WO1B0OOO22O7 iW01:A00.0.QH06 i^0'llB00002162i\A/nilBQ0W2'l^a iW.Ql|B0OQO2222 Plot for [YNG] YOUNC Summary Obs Used; 36 Obs Without Wind: 0 Avg Speed: 8.4 mph Generated: 06 Mar 2023 F8 iSfe- . :i i.. W Martin St It TETRA TECH Prepared By: TetraTech Inc. State Gamelands No 285 Figure 1 Continuous Air Monitoring Community Stations Legend 0 Continuous Air Monitoring Locations with DustTrak [¦"] Continuous Air Monitoring Locations h Derailment Location One Mile Radius East Palestine Derailment ER Site 75 E Main St East Palestine, Columbiana County, OH 44413 Reference Map Date Saved: 3/6/2023 ------- |