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. 2018 Mar 22;15(4):571. doi: 10.3390/ijerph15040571

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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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Location of the CPS. Red Line: boundary of the chromate production sites; Red Dots: soil profiles of the chromite ore processing residues (COPR) Storage Area; Orange Dots: soil profiles in the Production Plant Area; Pink Dots: soil profiles in the Xiangyue Chemical Plant; Green Dots: soil profiles in the Residential District; Blue Dots: soil profiles in the Changsha Zinc Plant; Square: remaining slag pits after dealing with COPR. The green and yellow squares were designated as P1 and P2, respectively.