Stormwater Pollution Prevention Plan Development and Review
Purpose and required content
A SWPPP identifies potential pollutant sources on a construction site and specifies the controls, sequence, and procedures that will prevent them from reaching receiving waters. A defensible plan contains: site description and receiving waters; nature of the construction activity and expected pollutants; a description of controls with enough detail to install them; the construction sequence; inspection and maintenance procedures; non-stormwater management; spill prevention and response; the pollution prevention team; and training and recordkeeping provisions.
Signature, currency, and condition
The SWPPP must be signed by a corporate officer or authorized representative, kept accessible on site, and updated whenever site conditions or the scope of work change. Certification is a legal statement, not a formality.
What reviewers should catch
- BMPs named but not specified - no dimensions, spacing, or outlet detail.
- No construction sequence, so temporary controls cannot be installed before grading.
- Missing inlet, channel, and outfall protection, or a sediment basin without a dewatering design.
- No stabilization deadlines or stockpile management.
- Off-site borrow, spoil, and concrete washout unaddressed.
- Inspection forms that do not require corrective actions and closure dates.
Worked example
An 8-acre disturbance under the EPA construction general permit would typically require inspections at least weekly (or every 14 days plus within 24 hours of a qualifying storm), stabilization of inactive areas within 14 days, and sediment controls installed before upslope earthwork begins. State permits may be stricter - check the governing document.
Rule of thumb
The most common review failure is not a missing element; it is a plan that does not match what is on the ground. Compare the narrative, the drawings, and the site.