hw9ees3040_fa10

hw9ees3040_fa10 - EES 3040 Introduction to Environmental...

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EES 3040: Introduction to Environmental Engineering Homework 9 Air Quality Due Thursday, November 11, 2010 at 1:15 pm Reading Assignment: D&M1 Chapter 1, pp. 18-21; Chapter 11, pp. 436-458, 471-484; or D&M2 Ch 12, pp. 524-547, 571-582. Internet: http://www.epa.gov/climatechange/index.html http://www.floridaenergy.ufl.edu/?page_id=13 Problems: (30 points maximum) Use your class notes, your text, and the Internet to answer the following questions. Please type your answers for Problem 5-7. 1. (4 pts.) Convert the following indoor air quality standard established by the U.S. Occupational Safety and Health Administration (OSHA) from ppm to mg/m3 (assuming 25 o C and 1 atm), or vice versa. Hint: see Chapter 2 and HW1. a. Naphthalene (C 10 H 8 ) (chemical in mothballs), 10.0 ppm b. Nicotine (C 10 H 14 N 2 ), 1.0 mg/m 3 2. (4 pts.) A single-story house with an infiltration rate of 0.35/hr has 250 m 2 of floor space and a total volume of 725 m 3 . Radon is emitted from the soil and enters the house at a rate of 0.6 pCi/m 2 -s. Radon has a decay rate constant of 7.6 x 10 -3 /hr.
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