Question

A four year old child has been playing in soil contaminated with 500 mg/kg of tetrachloromethylene. It is estimated that he ingested 5 g/d of soil over a 3 month period. The exposure frequency is 7 days/week. What is the estimated chronic daily intake of tetrachloromethylene for the child over the three month period? ​

Answer 1

Answer:

1

Chapter 3 FE EXAM FORMATTED PROBLEMS3-1. A four year old child has been playing in soil contaminated with 500 mg/kg of tetrachloroethylene. It is estimated that he ingested 5g/d of soil over a single 3 month period. The exposure frequency was 7 days per week. What is the estimated chronic daily intake of tetrachloroethylene for the child over the 3 month period?From Eq. 3-14dkgmgdayskgyeardaymgkggmgdaygkgmgCDIyeardaysmonthweek syearmonthsweekdayEFkgBWATBWEDEFFICFIRCS/156.0)84)(16()/84)(0.1)(/10)(/1000)(/5)(/500(/84)/4)(/3)(/7(16:TableFrom))(())()()()()((CDI63-2. Characterize the risk of an oral chronic daily intake of 50 ppb of arsenic.072.0928.01075.0exp1Risk19-3Eq.use01.0Because075.05.1050.01.5Arsenic3-3TableFrommgdkgdkgmgRiskmgdkg3-3.Characterize the hazard of an oral chronic daily intake of 0.005mg/L of cadmium.10/0005.00.005HI20-3Eq.and4-3TableUsingLmgmg/L3-4.Estimate the concentration of Heptachlor in fish if the concentration in water is 5 ppb. The bioconcentration factor is 15,700.kgmgkgLLmg/5.78/15700/105fishin ion Concentrat9-3Eq.Frommg/L105or g/L55ppbg/L11ppb3-3