____ 6. What percentage of U.S. rivers are considered degraded? 8% 16% 40% 80% _
ID: 153509 • Letter: #
Question
____ 6. What percentage of U.S. rivers are considered degraded?
8%
16%
40%
80%
____ 7. Which causes more river pollution?
Runoff from farms.
Industrial sources.
____ 8. How large is the oil slick caused by dumping a quart of oil down a storm drain?
50-100 sq. ft.
100-1,000 sq ft.
1,000-10,000 sq. ft.
10,000-50,000 sq ft.
more than 50,000 sq. ft.
____ 9. Is water passing through storm drains treated before entering streams and rivers? (Yes/No/Usually/Sometimes)
____ 10. Is water passing through sanitary sewers treated before entering streams and rivers? (Yes/No/Usually/Sometimes)
Explanation / Answer
6.40%
7. Runoff from farms
8.Both 10,000-50,000 sq ft. & more than 50,000 sq. ft. options are acceptable.
one quart of oil can contaminate up to 250,000 gallons of drinking water or cause an oil slick almost 2 acres in size. If you convert these in the cubic foot, both options are counted
9. No
10. Yes
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