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. 2018 Jul 16;15(7):1500. doi: 10.3390/ijerph15071500

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© 2018 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 (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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(a) Acute and (b) chronic hazard quotients (HQ) and hazard indices (HI) for 54 VOCs identified as emitted from OG operations in Colorado. The dotted lines indicate a HQ of 0.1 and 1. Note the log scale.

(a) Acute and (b) chronic hazard quotients (HQ) and hazard indices (HI) for 54 VOCs identified as emitted from OG operations in Colorado. The dotted lines indicate a HQ of 0.1 and 1. Note the log scale.