A184-0013
Now we’re cooking: How do activities in the home impact exposure?

Tuesday, 15 December 2020
Poster
Anna Hodshire1, Andrew Abeleira2, Laura Ampollini3, Caleb Arata4, James Mattila5, Matson A Pothier6, Chen Wang7, Jonathan Abbatt8, Ellison Carter9, Peter DeCarlo10, Allen H Goldstein11, William W Nazaroff12, Marina Vance13, Delphine Farmer6 and HOMEChem Science Team , (1)Colorado State University, Department of Atmospheric Science, Fort Collins, CO, United States, (2)Colorado State University, Fort Collins, CO, United States, (3)Drexel University, Philadelphia, United States, (4)University of California Berkeley, Berkeley, United States, (5)Colorado State University, Fort Collins, United States, (6)Department of Chemistry, Colorado State University, Fort Collins, CO, United States, (7)University of Toronto, Toronto, ON, Canada, (8)University of Toronto, Department of Chemistry, Toronto, ON, Canada, (9)Colorado State University, Civil and Environmental Engineering, Fort Collins, CO, United States, (10)Johns Hopkins University, Department of Environmental Health and Engineering, Balitmore, MD, United States, (11)University of California Berkeley, Berkeley, CA, United States, (12)Univ California-Berkeley, Berkeley, CA, United States, (13)University of Colorado, Boulder, CO, United States
Abstract:
Common household activities, such as cooking and cleaning, rapidly emit primary gas-phase compounds into homes. These emitted gases disperse and may reversibly sorb on surfaces, be removed through ventilation or air cleaning processes, or undergo reactions with oxidants to create secondary products. Some emitted compounds have been identified as hazardous to human health upon exposure above threshold limits, and emissions standards databases exist to provide guidelines on air quality. Exposure limits depend on both the duration and concentration of exposure, with threshold limits and health effects generally divisible into short term (often 1 hour or less), 8-hour (simulating a work day), and chronic (over the course of a lifetime) limits. Here, we consider short term and chronic exposures using data from the 2018 HOMEChem (House Observations of Microbial and Environmental Chemistry) field campaign. HOMEChem consisted of scripted realistic cooking, cleaning, and ventilating activities in a test house. A comprehensive suite of instrumentation characterized chemical emissions and oxidant levels, providing measurements of over 200 gas-phase compounds during activities. Some activities, like bleach mopping, can be considered as short term, as generally this would only occur intermittently in a household. Activities like cooking, however, may occur multiple times a day, leading to chronic exposures. We analyze events using both short term and chronic exposure limits from emissions standards databases to identify key compounds that exceed recommended limits during the study. As emissions standards only identify a small number of compounds identified in HOMEChem, we also apply structural activity relationship models to the entire dataset to estimate the subset of compounds with developmental toxicity, mutagenicity, and high animal model toxicity. We compare the model results to concentrations observed during HOMEChem to investigate their relative importance. Initial results suggest that acrolein and acetaldehyde were often relatively high during cooking events, while a large number of compounds emitted across activities may pose developmental toxicity risks.
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