CEE 153 F07 PS6

# CEE 153 F07 PS6 - UNIVERSITY OF CALIFORNIA, LOS ANGELES...

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UNIVERSITY OF CALIFORNIA, LOS ANGELES Civil and Environmental Engineering Department CEE 153 Introduction to Environmental Engineering Science Fall Term 2007 T-Th 2-4 PM 4000A Math Science Prof. K. D. Stolzenbach 5732J Boelter Hall, 206-7624 [email protected] Problem Set # 6 (due Thursday November 29) ________________________________________________________________________ _____ Note: for risk assessment problems below use tables in chapter 4 of the text. 1. A manufacturing company has gathered the following information on annual mass flows of methylene chloride (CH 2 Cl 2 ) in and out of the manufacturing plant: Purchases of CH 2 Cl 2 : 228 barrels Concentration of CH 2 Cl 2 i n the flow to the treatment plant: 4.04 mg/L Discharge to the treatment plant: 0.076 m 3 /s CH 2 Cl 2 shipped out as hazardous: 228 barrels ( 2 5 % C H 2 Cl 2 by volume) Unused barrels of pure CH 2 Cl 2 : 8 Estimate the annual mass emissions of CH 2 Cl 2 from the plant to the atmosphere. (Note: 1 barrel = 0.12 m 3 and the density of CH 2 Cl 2 is 1326 kg/m 3 ) [16,254 kg/yr] 2. A 55 gallon (220 L) drum of tritiated water (water containing some 3 H) is found on November 11, 1993 in a warehouse. The label specifies an activity of 30 Ci/mL and is dated November 11, 1960. a)

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## This note was uploaded on 05/19/2011 for the course CEE 153 taught by Professor Stolzenbach during the Fall '08 term at UCLA.

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CEE 153 F07 PS6 - UNIVERSITY OF CALIFORNIA, LOS ANGELES...

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