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Run-off


It has been determined that the calculated runoff of a site development will exceed the existing municipal storm sewer's capacity. What is the most likely solution to be proposed?
A. create a larger leach field
B. create a retention pond
C. create a detention pond
D. recalculate using a storm event period of smaller magnitude


Answer is C. create a detention pond, which serves as a temporary holding pond for the site runoff, until it drains at a controlled rate to the sewer system.

B. will hold the runoff indefinitely, A. is only applicable to a septic system, D. is set by local regulations and practice.
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