The land area from which water drains into a stream, river, or reservoir
Watershed
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The land area from which water drains into a stream, river, or reservoir
What is the recommended chlorine dosage when disinfecting a water main using tablets?
A | 10 mg/L |
B | 4 mg/L |
C | 25 mg/L |
D | 50 mg/L |
Sample test question:
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