Stormwater is the compliance area where construction employers are most often surprised, because the enforcement does not come from the same agency as everything else on the site.
The permit
Construction stormwater discharges in California are regulated under the Construction General Permit, Order WQ 2022-0057-DWQ, issued by the State Water Resources Control Board and administered through the regional boards. Coverage is obtained by filing permit registration documents, and the central technical document is the Storm Water Pollution Prevention Plan — the SWPPP.
What the plan is for
A SWPPP is not a binder to satisfy an inspector. It is the site’s water plan: what the drainage actually does, what pollutants the work will generate, what controls stop them leaving the site, who inspects, how often, what triggers a rain-event inspection, what sampling is required, and what happens when a control fails.
The failures are consistent. Controls drawn on a plan that no longer matches the site after the grading changed. Inspections signed on days with no rain and none recorded for the storm that mattered. Concrete washout in a hole in the ground. Perimeter protection installed once and never repaired. None of that is difficult to fix; all of it is easy to document from the road.
Who develops it
Under the permit, a SWPPP is developed by a Qualified SWPPP Developer, and implementation on site is overseen by a Qualified SWPPP Practitioner. I hold the QSD qualification and prepare these plans, and I do compliance inspections against them. Those are two distinct roles and it is worth knowing which one a consultant is actually filling on your job.
The practical advice
Write the plan against the schedule, not against the finished site. The risk profile of a project changes completely between clearing, mass grading, underground, and vertical construction, and a single set of controls will be wrong for at least two of those phases. Then put the inspection duty on someone who is on site every day and give them the authority to buy silt fence without a purchase order. Most stormwater violations are logistics failures, not engineering failures.
Michael Karl McNeil — Qualified SWPPP Developer; environmental health and safety consulting.
Michael Karl McNeil 