Question: a child drinks 1 l of water every day that...
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A child drinks 1 L of water every day that contains the following contaminants at their respective drinking water limits; 10 mg/L xylene (RfD = 0.2 mg/kg-day), 1 mg/L toluene (RfD = 0.8 mg/kg-day), 10 µg/L arsenic (RfD = 0.0003 mg/kg-day) and 0.1 mg/L hexavalent chromium (RfD = 0.003 mg/kg-day). Recognizing that risk is cumulative, does this exposure pose a non-carcinogenic health risk?
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