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FIGURE 2-2 Detection frequencies in domestic well samples for 15 most frequently detected VOCs at levels of 0.2 and 0.02 μg/L.
SOURCE: Zogorski et al. (2006) with illustration provided by USGS National Water Quality Assessment program.

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FIGURE 2-3 The 15 most frequently detected VOCs in public supply wells.
SOURCE: Zogorski et al. (2006) with illustration provided by USGS National Water Quality Assessment program.



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