What SCDHEC looks for during a construction site inspection in South Carolina

SCDHEC inspectors can visit any active NPDES-permitted construction site in South Carolina without prior notice. A field inspection covers two things: the physical condition of the BMPs on the site, and the completeness of the inspection record in the SWPPP. Both must be in order. A site where the BMPs are intact but the inspection log is missing entries is still in violation. Most construction site findings fall into one of three categories: a BMP that failed or was not installed correctly, an inspection record that is not current, or a SWPPP that is not on site during the inspection.

Of these, incomplete records are the most common because they are the easiest to accumulate without noticing. A rain event inspection missed during a busy week, a seven-day entry signed three days late, an entry not tied to a specific inspector name: individually they look minor. When an inspector arrives and reviews the log, each one is a documented deficiency.

What the inspector reviews

A field inspection typically begins with a request for the SWPPP and inspection log. The inspector confirms that the SWPPP reflects current site conditions, that the inspection record is complete through the most recent required inspection date, and that all rain event inspections within the last 30 days have been logged within the 24-hour window. The inspector then walks the site to compare physical BMP conditions against what the record describes. Sediment basins, silt fence runs, inlet protection, the stabilized construction entrance, slope stabilization measures, and drainage diversions are the standard checklist.

Discharge points receive close attention. Sites adjacent to streams, drainage channels, or wetlands are inspected for evidence of sediment-laden discharge reaching receiving waters. The inspection record is expected to document discharge point conditions at every scheduled inspection visit, not only when conditions are visibly poor. A record that documents interior BMPs but omits discharge point observations at a waterway-adjacent site does not demonstrate complete compliance.

When the record does not match site conditions

An inspection record that is current but describes BMP conditions as acceptable when the site has visible silt fence failures is a factual discrepancy the inspector will note. An inspection record that is missing a rain event entry for a qualifying rainfall event is a violation regardless of current BMP condition. The record must be current to the inspection schedule the permit requires: at minimum every seven calendar days during active disturbance, and within 24 hours of any rainfall event measuring 0.5 inches or more.

SCDHEC enforcement in South Carolina for construction stormwater violations includes notices of deficiency with corrective action deadlines, compliance orders, and civil penalties that scale with the severity and duration of the violation. First-time findings with prompt corrective action generally result in a notice with a deadline. Sites with documented sediment discharge to receiving waters, repeat violations at the same site, or records showing a long gap in inspection compliance receive more significant enforcement.

How aerial documentation supports a complete record

A drone inspection conducted on schedule produces GPS-tagged photos covering the full site at each inspection visit: perimeter silt fence, sediment basins and traps, inlet protection at every drop inlet, the construction entrance, stabilized slopes, and discharge points at the site boundary. Each image carries coordinates and a timestamp. The documentation goes into the SWPPP log as the record for that inspection date.

What aerial documentation addresses specifically is perimeter coverage on sites where a ground inspection under time pressure does not reach every BMP location. A 20-acre site with silt fence along three sides, a sediment basin in one corner, and discharge points behind the grading operation takes time to walk completely. An inspector reviewing a record that documents only the areas near the main construction entrance is likely to note what is missing. A complete record covers the full perimeter and every identified control.

For SWPPP consultants managing multiple permitted sites

Environmental consultants serving as the qualified inspector of record on multiple active sites face the same constraint during rain events: the 24-hour window runs at every site simultaneously, and sites may be spread across multiple counties. Aerial documentation of a site can be delivered in a format that goes directly into the SWPPP log. The qualified inspector reviews the documentation, confirms the conditions described, signs the inspection record, and the log is current. The consultant remains the inspector of record for every site. The aerial operator works as a documentation subcontractor.

Drone SWPPP inspection support is available for active permitted sites in Greenville, Spartanburg, Anderson, Pickens, and Oconee counties. See SWPPP inspection support for how the subcontractor workflow operates and what the deliverable format looks like for a SWPPP log. For city-specific BMP inspection coverage, see drone BMP inspections.

FAA Part 107 certified. Insured. Based in Clemson, SC. Drone BMP inspection documentation available for active NPDES-permitted construction sites in Upstate SC.