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Hydrogen Sulfide (H2S)
taste at concentrations as low as 0.05 ppm (mg/l) and by smell at concentrations as low as 0.1 ppm. ... concentration level of 0.1 parts per million (ppm) recommended by the Ohio Department of Health. Drinking water ...
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Stream Buffers
¼ acre ($0.01/sq. ft.), while other kinds of seed mixes can cost as much as $400 for ¼ acre ($0.04/sq. ...