Stormwater Control and Management: Materials, Post-Construction, Plans, and Compliance
Plans are living documents
The SWPPP is not a binder that gets written once. It must be modified when the site changes - new phasing, relocated BMPs, a different discharge point - and the inspector's field notes are usually what triggers the change. Keep the inspection log, the corrective-action log, and rain-event records together, because enforcement questions are answered from the file, not from memory.
Materials management and post-construction
Manage materials before they become pollutants: cover and contain exposed stockpiles, provide secondary containment for fuel and oil, keep spill kits where the fuel is, and control dust with water or stabilizers. Concrete washout is a recurring exam trap - washout water is highly alkaline and must never reach a storm drain, ditch, or sediment basin; use a lined, dedicated washout that is pumped out. Post-construction obligations do not stop at paving: final stabilization (typically 70 percent uniform perennial vegetative cover or an equivalent measure), removal of temporary BMPs, as-built drawings, and a long-term operation and maintenance plan handed to the owner.
Compliance and enforcement
Inspect at the permit frequency, which usually means weekly and within 24 hours after a qualifying rain event, and document even uneventful visits. Record deficiencies, assign corrective actions within the permit clock (commonly seven days, or before the next rain event if that comes first), and verify the fix in a follow-up. Escalate repeat or serious noncompliance in writing through the chain you established at the pre-activity meeting.
Rule of thumb: 'no discharge observed' is a finding worth writing; 'no inspection performed' is a violation. Inspect on schedule, every time.