1 mg/kg or 1 mg/L. 1 ppm. 1 ug/kg or 1 ug/L. 1 ppb. 1 mg/g. 1,000 ppm. 1 ug/g ... ounces (fluid) 29.573 milliliters ounces. 28.35 grams lb/gal. 0.12 kg/l.
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