A 2-year-old child has been playing in soil contaminated with 500 mg/kg of tetrachloroethylene. It is estimated that she ingested 5 g/day of soil over an 8-month period. The exposure frequency was 7 days per week. The EPA standard weight for a child 1-5 years-old is 16 kg. What is the chronic daily intake (CDI) of tetrachloroethylene for the child over the 8-month period? What is the percent change in CDI if the child actually weighs 12 kg?

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Landfills

The landfill is a site used for the disposal of waste materials. The landfill is a solid waste facility that is often known as a dumping ground. The image below shows a landfill site in Hawaii. Landfilling is the most ancient and common method used for the disposal of waste. For the landfill, a deep trench is constructed in an isolated place away from the city. The trench for landfills is designed properly after analyzing the total population and the waste generation per capita. The waste is dumped into the trench and after every layer of waste, a layer of soil is spread on the top of it.