A construction project disturbs 2.5 acres of land. Under NPDES regulations, what stormwater management requirement applies?
Correct Answer
C) Notice of Intent (NOI) must be filed
NPDES regulations require a Notice of Intent (NOI) to be filed for construction activities that disturb one acre or more of land. Since this project disturbs 2.5 acres, an NOI is mandatory.
Why This Is the Correct Answer
Under the National Pollutant Discharge Elimination System (NPDES) regulations, any construction activity that disturbs one acre or more of land requires filing a Notice of Intent (NOI) for stormwater discharge permits. Since this project disturbs 2.5 acres, it exceeds the one-acre threshold and therefore mandates an NOI filing. This is a federal requirement that applies regardless of state or local regulations, making option B the correct answer.
Why the Other Options Are Wrong
Option B: Local approval sufficient
Option A is incorrect because NPDES regulations specifically require permits for construction activities disturbing one acre or more. Since 2.5 acres exceeds this threshold, a permit is definitely required.
Option D: No permit required
Option C is incorrect because while state permits may also be required, the NPDES is a federal program that requires the NOI filing as the primary requirement. State permits alone do not satisfy the federal NPDES requirements.
Memory Technique
Think 'ONE and DONE' - One acre or more means you're DONE without an NOI (Notice of Intent)
Reference Hint
Look up Environmental Regulations chapter or Water Quality/Stormwater Management sections in your contractor reference manual
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