Which NC environmental regulation applies to construction projects that disturb more than one acre of land?
Correct Answer
D) Stormwater discharge permits
NC environmental regulations require stormwater discharge permits for construction projects that disturb more than one acre of land.
Why This Is the Correct Answer
NC environmental regulations require a Construction Stormwater General Permit (NCG010000) for projects that disturb one or more acres of land. This permit requires the preparation and implementation of a Stormwater Pollution Prevention Plan (SWPPP) and compliance with NPDES (National Pollutant Discharge Elimination System) requirements.
Why the Other Options Are Wrong
Option A: Groundwater permits
Incorrect. Groundwater permits regulate activities that withdraw from or affect groundwater aquifers, not construction site land disturbance. Land-disturbing activities primarily affect surface runoff, which is regulated through stormwater permits.
Option B: Wetland permits
Incorrect. Wetland permits (Section 404 permits under the Clean Water Act) are required when construction activities will fill or dredge wetlands or waters of the US. While a large construction project may also need a wetland permit if wetlands are present, the one-acre land disturbance threshold specifically triggers stormwater discharge permit requirements.
Option C: Air quality permits
Incorrect. Air quality permits regulate emissions of air pollutants from stationary sources, equipment, and industrial processes. Land disturbance for construction does not typically trigger air quality permitting — that threshold is activity-based, not acreage-based.
Memory Technique
One acre = stormwater control required. Think: 'An acre of dirt, stormwater alert.' The NPDES stormwater program uses one acre as the federal threshold — NC adopts this same trigger. 'One acre, one permit (stormwater).'
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