Use the CDI expression to determine the carcinogenic risk associated with daily consumption of water with benzene at a concentration of 5 µg/L for an adult male (slope factor for benzene = 0.015 kg-day/mg). Use EF = 350 d/yr, ED = 30 years, and AT = 70 years.
Added by Penny B.
Your feedback will help us improve your experience
Sri K and 68 other Biology educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
Q.4 Suppose an individual eats fish from a river contaminated by benzene. What concentration of benzene (mg/L) in the water would produce a lifetime risk of 1Ă—10-5 to an individual who eats the amount of fish suggested by the EPA exposure factors?
Sri K.
a. The chemical formula of benzene is C6H6. Compute the molecular weight of benzene. b. The solubility of pure benzene in water is 0.023 M at 15°C. What is the solubility in mg/L? c. The EPA drinking water "maximum concentration limit" (MCL) for benzene is 0.005 mg/L. There is a tank with liquid benzene that has also gotten some water into it. The water has become saturated with benzene so that the concentration of benzene in the water is the solubility of benzene. Of 100 gallons that water was released, by what volume of water would you have to dilute it to bring the concentration down to the MCL?
David C.
Studies have shown that people who work with benzene longer than five years have 20 times the incidence of leukemia than the general population. As a result, OSHA (Occupational Safety and Health Administration) has set a time-weighted average permissible exposure limit of 1 ppm. A steel manufacturing plant, which exposes its workers to benzene daily, is under investigation for possible violations of the permissible exposure limit. Thirty-six measurements, taken over a period of 1.5 months, yielded X̄ = 2.1 ppm, S = 4.1 ppm. (a) Carry out the test by constructing reject region for H0 : μ = 1 vs Ha : μ > 1 under α = 0.05. (b) Find the probability of type II error when the true concentration is 2 ppm.
Recommended Textbooks
Biology for AP Courses
Objective Biology for NEET
Introduction to General, Organic and Biochemistry
Transcript
Watch the video solution with this free unlock.
EMAIL
PASSWORD