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. 2016 Jun 6;6:27311. doi: 10.1038/srep27311

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The axes and colors are consistent with Figs 4 and 5. The intake axes denote water ingestion from 1–250 L. BA concentrations were measured in sediments, and how much BA may be found in water is unknown, but can be assumed to be much lower than sediments. Therefore we show a range of possible exposures, where the amount in water is 1/1000^th what is found in sediments (α = 0.001), where the amount in the water is 1/100^th what is found in sediments (α = 0.01), and an unrealistic, worst-case scenario where the amount of BA in the water is the same (per unit mass) as the amount in the sediments below (α = 1) (Equation 4). Results for boreholes are similar to natural springs, and are shown in Figure S1.