The drinking water standard (MCL) for arsenic in wate

Question 1 of 19 6.0 Points
The drinking water standard (MCL) for arsenic in water is 10 micrograms per liter. For a
concentration of 0.29 milligrams per liter arsenic, the corresponding hazard quotient (HQ) is
(only put your answer in the blank; do not attempt to show your work):
Question 2 of 19 6.0 Points
3.9 milligrams per liter of copper equals 3,900 micrograms per liter of copper.
True
False
Question 3 of 19 10.0 Points
Chapter 3: What are the pathways of toxicant uptake by plants? Which is the most important for
the uptake of metals?
Question 4 of 19 10.0 Points
Chapter 3: Many organic contaminants cross the barrier of the skin because they are soluble in
lipids.
True
False
Question 5 of 19 10.0 Points
Chapter 3: What are the principal pathways of chemical uptake by terrestrial animals including
humans?

Question 6 of 19 10.0 Points
Chapter 3: In fish, which organs are involved in the regulation of electrolytes? Describe how
they function in freshwater and seawater.

Question 7 of 19 3.0 Points

The hazard quotient for surface-water sample EB-1 relative to the human drinking water
maximum contaminant limit (MCL) is ? Provide your answer to two decimal places (X.XX).

Question 8 of 19 3.0 Points
The hazard quotient for surface-water sample EB-2 relative to the human drinking water
maximum contaminant limit (MCL) is ? Provide your answer to two decimal places (X.XX).
Question 9 of 19 3.0 Points
The hazard quotient for surface-water sample EB-3 relative to the human drinking water
maximum contaminant limit (MCL) is ? Provide your answer to two decimal places (X.XX).
Question 10 of 19 3.0 Points
The hazard quotient for surface-water sample EB-4 relative to the human drinking water
maximum contaminant limit (MCL) is ? Provide your answer to two decimal places (X.XX).
Question 11 of 19 3.0 Points
The hazard quotient for surface-water sample SB-1 relative to the human drinking water
maximum contaminant limit (MCL) is ? Provide your answer to two decimal places (X.XX).
Question 12 of 19 3.0 Points
The hazard quotient for surface-water sample SB-2 relative to the human drinking water
maximum contaminant limit (MCL) is ? Provide your answer to two decimal places (X.XX).

Question 13 of 19 3.0 Points
The hazard quotient for surface-water sample SB-3 relative to the human drinking water
maximum contaminant limit (MCL) is ? Provide your answer to two decimal places (X.XX).
Question 14 of 19 3.0 Points
The hazard quotient for surface-water sample SB-4 relative to the human drinking water
maximum contaminant limit (MCL) is ? Provide your answer to two decimal places (X.XX).
Question 15 of 19 3.0 Points
The hazard quotient for surface-water sample SB-5 relative to the human drinking water
maximum contaminant limit (MCL) is ? Provide your answer to two decimal places (X.XX).

Question 16 of 19 3.0 Points
The hazard quotient for surface-water sample OR-1 relative to the human drinking water
maximum contaminant limit (MCL) is ? Provide your answer to two decimal places (X.XX).
Question 17 of 19 3.0 Points
The hazard quotient for surface-water sample OR-2 relative to the human drinking water
maximum contaminant limit (MCL) is ? Provide your answer to two decimal places (X.XX).
Question 18 of 19 3.0 Points
The hazard quotient for surface-water sample OR-3 relative to the human drinking water
maximum contaminant limit (MCL) is ? Provide your answer to two decimal places (X.XX).
Question 19 of 19 12.0 Points
The surface-water sites that exceeded the drinking water standard (MCL) are:
A. EB1
B. EB2
C. EB3
D. EB4
E. SB1
F. SB2
G. SB3
H. SB4
I. SB5
J. OR1
K. OR2
L. OR3