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. 2020 Jul 1;17:29. doi: 10.1186/s12989-020-00361-3

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© The Author(s) 2020

Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated in a credit line to the data.

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Fig. 1 — Exposures in Blue Gap Tachee, AZ. CAPs characterization data via analytical methods and AirCARE 1 wind exposure metrics. a CAPs concentration on each exposure day (mg/m³) b CAPs concentration (mg/m³) over the exposure time frame. The average CAPs concentration over 4 h was recorded at 96.6 ± 60.4 μg/m³ (mean ± SEM) c Wind speed as assessed at the exposure site. Wind generally blew from the southwest or northeast throughout the exposure period. d Mass concentration of metals in CAPs (mg/m³)