Homework Help is Here – Start Your Trial Now!
Engineering
Civil Engineering
Drainage from a former pesticide manufacturing site enters Bear River at river kilometer 240. The drainage contains DDT, and the concentration of DDT after complete mixing is 5 µg/L. The town of Bear Valley, adult population 15,000, uses the river at river kilometer 40 for its water supply with only chlorination. The drainage has occurred for 30 years. The river velocity is 5 cm/s. Assume the half-life of DDT is 70 days (a) The concentration of DDT in the town's drinking water is mostly nearly (A) 1.2 µg/L (B) 2.3 μg/L (C) 3.2 μg/L (D) 3.9 µg/L (b) With 2 L/day water consumption, adult body mass of 70 kg, and life expectancy of 70 years, the lifetime chronic daily intake of DDT for an adult living in Bear Valley is most nearly (A) 4 x 10³ mg/kg-day (B) 8 x 10 mg/kg-day (C) 6 x 10³ mg/kg-day (D) 2 x 10² mg/kg-day (c) Assume a slope factor of 0.34 (mg/kg-day)-¹ for DDT. The number of excess lifetime cancers that can be expected in the adult population of Bear Valley is most nearly (A) 0.05 (B) 0.2 (C) 4 (D) 12

Drainage from a former pesticide manufacturing site enters Bear River at river kilometer 240. The drainage contains DDT, and the concentration of DDT after complete mixing is 5 µg/L. The town of Bear Valley, adult population 15,000, uses the river at river kilometer 40 for its water supply with only chlorination. The drainage has occurred for 30 years. The river velocity is 5 cm/s. Assume the half-life of DDT is 70 days (a) The concentration of DDT in the town's drinking water is mostly nearly (A) 1.2 µg/L (B) 2.3 μg/L (C) 3.2 μg/L (D) 3.9 µg/L (b) With 2 L/day water consumption, adult body mass of 70 kg, and life expectancy of 70 years, the lifetime chronic daily intake of DDT for an adult living in Bear Valley is most nearly (A) 4 x 10³ mg/kg-day (B) 8 x 10 mg/kg-day (C) 6 x 10³ mg/kg-day (D) 2 x 10² mg/kg-day (c) Assume a slope factor of 0.34 (mg/kg-day)-¹ for DDT. The number of excess lifetime cancers that can be expected in the adult population of Bear Valley is most nearly (A) 0.05 (B) 0.2 (C) 4 (D) 12

Structural Analysis
Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
See similar textbooks
icon
Related questions
Question
100%
Drainage from a former pesticide manufacturing site enters Bear River at river kilometer 240. The drainage contains DDT, and the concentration of DDT after complete mixing is 5 µg/L. The town of Bear Valley, adult population 15,000, uses the river at river kilometer 40 for its water supply with only chlorination. The drainage has occurred for 30 years. The river velocity is 5 cm/s. Assume the half-life of DDT is 70 days (a) The concentration of DDT in the town's drinking water is mostly nearly (A) 1.2 µg/L (B) 2.3 µg/L (C) 3.2 µg/L (D) 3.9 μg/L (b) With 2 L/day water consumption, adult body mass of 70 kg, and life expectancy of 70 years, the lifetime chronic daily intake of DDT for an adult living in Bear Valley is most nearly (A) 4 x 10³ mg/kg-day (B) 8 x 10 mg/kg-day (C) 6 x 10³ mg/kg-day (D) 2 x 10² mg/kg-day (c) Assume a slope factor of 0.34 (mg/kg-day)-¹ for DDT. The number of excess lifetime cancers that can be expected in the adult population of Bear Valley is most nearly (A) 0.05 (B) 0.2 (C) 4 (D) 12
Transcribed Image Text:Drainage from a former pesticide manufacturing site enters Bear River at river kilometer 240. The drainage contains DDT, and the concentration of DDT after complete mixing is 5 µg/L. The town of Bear Valley, adult population 15,000, uses the river at river kilometer 40 for its water supply with only chlorination. The drainage has occurred for 30 years. The river velocity is 5 cm/s. Assume the half-life of DDT is 70 days (a) The concentration of DDT in the town's drinking water is mostly nearly (A) 1.2 µg/L (B) 2.3 µg/L (C) 3.2 µg/L (D) 3.9 μg/L (b) With 2 L/day water consumption, adult body mass of 70 kg, and life expectancy of 70 years, the lifetime chronic daily intake of DDT for an adult living in Bear Valley is most nearly (A) 4 x 10³ mg/kg-day (B) 8 x 10 mg/kg-day (C) 6 x 10³ mg/kg-day (D) 2 x 10² mg/kg-day (c) Assume a slope factor of 0.34 (mg/kg-day)-¹ for DDT. The number of excess lifetime cancers that can be expected in the adult population of Bear Valley is most nearly (A) 0.05 (B) 0.2 (C) 4 (D) 12
Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 5 steps

SEE SOLUTIONCheck out a sample Q&A here
Blurred answer
Knowledge Booster
Landfills
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, civil-engineering and related others by exploring similar questions and additional content below.
Similar questions
Recommended textbooks for you
Structural Analysis
Structural Analysis
Civil Engineering
ISBN:
9781337630931
Author:
KASSIMALI, Aslam.
Publisher:
Cengage,
Structural Analysis (10th Edition)
Structural Analysis (10th Edition)
Civil Engineering
ISBN:
9780134610672
Author:
Russell C. Hibbeler
Publisher:
PEARSON
Principles of Foundation Engineering (MindTap Cou…
Principles of Foundation Engineering (MindTap Cou…
Civil Engineering
ISBN:
9781337705028
Author:
Braja M. Das, Nagaratnam Sivakugan
Publisher:
Cengage Learning
Fundamentals of Structural Analysis
Fundamentals of Structural Analysis
Civil Engineering
ISBN:
9780073398006
Author:
Kenneth M. Leet Emeritus, Chia-Ming Uang, Joel Lanning
Publisher:
McGraw-Hill Education
Sustainable Energy
Sustainable Energy
Civil Engineering
ISBN:
9781337551663
Author:
DUNLAP, Richard A.
Publisher:
Cengage,
Traffic and Highway Engineering
Traffic and Highway Engineering
Civil Engineering
ISBN:
9781305156241
Author:
Garber, Nicholas J.
Publisher:
Cengage Learning
SEE MORE TEXTBOOKS