Does the SWPPP have to contain control measures for support activity areas?

• A. Yes, it is required for all sites.
• B. Yes, if the support is covered under the construction GP.
• C. No, never.
• D. Only if runoff occurs.

Answer: (B)

The plan must address runoff controls for any part of the site that falls under the Construction General Permit. Support activity areas require control measures only if those activities are covered by the GP. When they are, the SWPPP should specify appropriate controls to prevent sediment and other pollutants from leaving those areas—anything from erosion controls and sediment barriers to proper material storage, spill prevention, and housekeeping practices. If those support areas aren’t within the GP’s coverage, they aren’t required to have SWPPP controls under the permit.