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. 2011 Aug 24;8(8):3496–3513. doi: 10.3390/ijerph8083496

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© 2011 by the authors; licensee MDPI, Basel, Switzerland.

This article is an open-access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/3.0/).

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Figure 4. — Centrifugal test results: spatial distribution of LNAPL concentration in unsaturated soil after 1-year migration (groundwater flow, unit: ppm) [28].