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  1. OSU Extension Factsheets

    https://ohiowatersheds.osu.edu/resources/watershed-management/osu-extension-factsheets

    Organizing and Sustaining a Watershed Group Available here: http://ohioline.osu.edu/ws-fact/0002.html Since ...

  2. Thallium

    https://ohiowatersheds.osu.edu/node/1526

    below 0.002 mg/L or 2 ppb: activated alumina ion exchange WEBSITE RESOURCES Ohio Department of Health- ...

  3. Mercury (inorganic)

    https://ohiowatersheds.osu.edu/node/1522

    method(s) have proven to be effective for removing mercury to below 0.002 mg/L or 2 ppb: ...