Homework 3 on Energy and Society - Problem 5.4 You would like to assess the risk of volatile organic compound emissions some of which are cancer agents

# Homework 3 on Energy and Society - Problem 5.4 You would...

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Problem 5.4 You would like to assess the risk of volatile organic compound emissions, some of which are cancer agents or suspected cancer agents , from a refinery. As a starting point, they will assess the cancer risk of their benzene emissions on residents located near the refinery. Information you’ll need to solve the questions: Maximum annual average concentration (C A ) of benzene in the outside air in the neighborhood is 80 μg/m 3 The cancer slope factor (SF) for benzene is 0.029 mg benzene/(kg body weight – day) Average adult body weight (BW) = 70 kg Air breathing rate (CR) = 19.92 m 3 /day Retention rate, inhaled air (RR) = 1.0 Adsorption rate, inhaled air = (ABS) 1.0 Exposure frequency (EF) = 365 days/yr Exposure duration (ED) = 70 years Averaging time (ΔT) = 25,500 days (a) What is the inhalation dose of benzene for a typical resident, using the following equation: (b) What is the inhalation carcinogenic risk for this scenario using the following relationship: Inhalation cancer risk = Inhalation dose * SF (c) Is the risk greater than the recommended range of <10-4 to 10-6 (1 in 10,000 to 1 in 1,000,000 additional people contracting cancer due to inhaled benzene) for carcinogenic?

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• Summer '14
• GeofSilcox
• Carcinogen, mg/kg body weight

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