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A site contractor will clear, grade, and excavate 1.4 acres as part of one commercial development. Which federal stormwater permitting threshold is triggered?

Correct Answer

C) Construction stormwater permit coverage is generally required at 1 acre or more, including smaller sites in a common plan

EPA NPDES construction stormwater requirements generally require permit coverage for construction activity disturbing 1 acre or more, and for smaller disturbances that are part of a larger common plan of development or sale. Other choices use the older large-construction threshold alone or ignore clearing and grading disturbance.

Answer Options
A
Treat the condition as requiring no permit threshold is reached until 5 acres on one parcel
B
Base the stormwater permitting response on concrete washout areas count toward the threshold
C
Construction stormwater permit coverage is generally required at 1 acre or more, including smaller sites in a common plan
D
Permit coverage is required only after final paving starts and use that item to close stormwater permitting

Why This Is the Correct Answer

EPA NPDES construction stormwater requirements generally require permit coverage for construction activity disturbing 1 acre or more, and for smaller disturbances that are part of a larger common plan of development or sale. Other choices use the older large-construction threshold alone or ignore clearing and grading disturbance.

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