Finding F-1237

“During this time period the average ozone concentration was 14 ppbv (28 μg m−3) and the monoterpene concentrations decreased from 15 ppbv to 12 ppbv (84 μg m−3 to 66 μg m−3).”

Poppendieck et al. Jingle bells, what are those smells? Indoor VOC emissions from a live Christmas tree (2024). Indoor environments. Page 9. CKB 6007

Structure

Factor: Ozone (O₃)
Method: Emission test chamber method
Setting: test chamber, US
Study design: chamber study at the National Institute of Standards and Technology: a freshly cut Douglas fir stood for seventeen days in an environmentally controlled chamber and the volatile organic compounds it emitted were measured continuously with a proton transfer reaction mass spectrometer, with ozone injected on several of the days to observe the indoor chemistry it starts (class 4)
Effect: mean 14
Caveat: an injected concentration in a chamber, not a room level

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.