Question

Estimate the concentration (in mg/kg) of heptachlor in fish if the concentration in water is 5ppb? What is the lifetime cancer risk of an adult eating said fish?

Answer 1

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Concentration of heptachlor in fish is given by, Concentration (CW) x (BCF) = Where, given that -3 Ppm Concentration of heptachlor in water, CW=5 ppb 5 x 10 We have, 1 ppm = 1mg/L Therefore, CW-5 x 10-^mg/L. Also, bio concentration factor, BCF=15700 L/kg Hence, Concentration in fish is given by (CW) x (BCF) 5 x 10^mg/Lx15700 L/kg. . Concentration = .. Concentration = 78. 5 mg /kg

Lifetime cancer risk of an adult eating said fish is 0.08461

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