Finding F-1140

“In billiard halls, mean ± SD concentrations were 22.9 ± 5.2 ppb for TVOC (range: 12.0–40.0 ppb), 154.9 ± 200.4 μg/m3 for NO2 (3.4–838.1 μg/m3), and 29.1 ± 14.0 μg/m3 for PM2.5 (5.5–60.3 μg/m3).”

Environmental monitoring and smoking exposure before and after the designation of non-smoking areas in indoor sports facilities (2026). Environ Anal Health Toxicol. Page 4. CKB 1606

Structure

Source: Tobacco smoke (secondhand smoke)
Factor: Nitrogen dioxide (NO₂)
Setting: billiard hall, KR
Study design: before-and-after monitoring in billiard halls and screen golf ranges in Korea: total volatile organic compounds, nitrogen dioxide and PM2.5 measured before and after the venues were designated non-smoking, against the 24-hour guidelines of the Korean Ministry of Environment (class 3)
Effect: mean 154.9

A Finding records what one published document states, verbatim and with its page. It is not a conclusion of Coridum; see the Claims that build on it.