Evaluating indoor exposure modeling alternatives for LCA: A case study in the vehicle repair industry Page: 3 of 26
This article is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided to Digital Library by the UNT Libraries Government Documents Department.
The following text was automatically extracted from the image on this page using optical character recognition software:
volatile organic compound (VOC) concentration measurements, integrated far-field area
samples, and simulated experiments were used in estimating parameters, such as
emission rates, diffusivity, and near-field dimensions. We assessed differences in model
input requirements and their efficacy for predictive modeling. The One-box model was
not able to resemble the temporal profile of exposure concentrations, but it performed
well concerning time-weighted exposure over extended time periods. However, this
model required an adjustment for spatial concentration gradients. Multi-zone models and
diffusion-models may solve this problem. However, we found that the reliable use of
both these models requires extensive field data to appropriately define pivotal parameters
such as diffusivity or near-field dimensions. We conclude that it is difficult to apply these
models for predicting VOC exposures in the workplace. However, for comparative
exposure scenarios in life-cycle assessment they may be useful.
KEYWORDS. Exposure model, VOC, life cycle assessment
BRIEFS. Modeling alternatives for occupational exposure are evaluated for their
standard use life cycle assessment (LCA).
For many hazardous chemicals, concentrations and exposures in indoor environments are
consistently and significantly higher than in ambient outdoor environments .
Consequently, inhalation intake fractions of indoor emissions can exceed those of
outdoor emissions by several orders of magnitude [1-3]. For example, in vehicle repair
shops, solvents in "aerosol" cans are used in large quantities during tasks such as engine
Here’s what’s next.
This article can be searched. Note: Results may vary based on the legibility of text within the document.
Tools / Downloads
Get a copy of this page or view the extracted text.
Citing and Sharing
Basic information for referencing this web page. We also provide extended guidance on usage rights, references, copying or embedding.
Reference the current page of this Article.
Demou, Evangelia; Hellweg, Stefanie; Wilson, Michael P.; Hammond, S. Katharine & McKone, Thomas E. Evaluating indoor exposure modeling alternatives for LCA: A case study in the vehicle repair industry, article, May 1, 2009; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc926735/m1/3/: accessed September 25, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.