Daniel Harris has always enjoyed eating tuna fish. Unfortunately, a study of the mercury content of canned tuna in 2010 found that chunk white tuna contains 0.6 ppm Hg and chunk light tuna contains 0.14 ppm2. The U.S. Environmental Protection Agency (EPA) recommends no more than 0.1 μg Hg/kg body weight per day. A person weighs 65 kg. How often may the person eat a can containing 6 ounces (16 oz=1 lb) of chunk white tuna so that they do not average more than 0.1 μg Hg/kg body weight per day? The person can consume one 6 oz can of chunk white tuna every ______ days.   If the person switches to chunk light tuna, how often can they eat one can?   The person can consume one 6 oz can of chunk light tuna every _______ days.

Daniel Harris has always enjoyed eating tuna fish. Unfortunately, a study of the mercury content of canned tuna in 2010 found that chunk white tuna contains 0.6 ppm Hg and chunk light tuna contains 0.14 ppm². The U.S. Environmental Protection Agency (EPA) recommends no more than 0.1 μg Hg/kg body weight per day.

A person weighs 65 kg. How often may the person eat a can containing 6 ounces (16 oz=1 lb) of chunk white tuna so that they do not average more than 0.1 μg Hg/kg body weight per day?

1. S. L. Gerstenberger, A. Martinson, and J.L. Kramer, "An Evaluation of Mercury Concentrations in Three Brands of Canned Tuna," Environ. Toxicol. Chem. 2010, 29, 237.