4.4 Environmental Compliance & Stormwater Permitting
Key Takeaways
- The FDEP NPDES Construction Generic Permit (CGP) is required for land disturbances of 1 acre or more, mandating Notice of Intent (NOI) filing 48 hours before earthwork starts.
- Stormwater Pollution Prevention Plans (SWPPPs) require certified inspections at least once every 7 calendar days AND within 24 hours of any 0.5-inch or greater rainfall event.
- Best Management Practices (BMPs) like silt fences, floating turbidity barriers, stabilized entrances, and concrete washouts prevent sediment transport into Florida surface waters.
- EPA NESHAP regulations mandate written notification to FDEP at least 10 working days prior to starting demolition of any commercial facility, regardless of asbestos presence.
4.4 Environmental Compliance & Stormwater Permitting
Florida's unique geographical landscape—characterized by high groundwater tables, extensive coastal waters, karst topography, and fragile aquatic ecosystems—demands strict environmental compliance from general contractors. Construction activities that disturb soil create significant risks of sediment runoff, turbidity pollution in navigable waters, and toxic chemical contamination. General Contractors operating in Florida must comply with regulations enforced by the U.S. Environmental Protection Agency (EPA Region 4), the Florida Department of Environmental Protection (FDEP), and Florida's five regional Water Management Districts (WMDs).
1. FDEP NPDES Construction Generic Permit (CGP)
Under Rule 61G4 and Florida Administrative Code (F.A.C.) Chapter 62-621, stormwater discharges associated with construction activities are regulated under the National Pollutant Discharge Elimination System (NPDES) framework.
Permitting Thresholds & Notice Requirements
- Applicability: Coverage under the FDEP Construction Generic Permit (CGP) is mandatory for any construction project that disturbs 1 acre or more of total land area (or disturbs less than 1 acre if part of a larger common plan of development or sale that will ultimately disturb 1 acre or more).
- Notice of Intent (NOI): The GC must submit an electronic Notice of Intent (NOI) (FDEP Form 62-621.300(4)(b)) and applicable permit fee to FDEP at least 48 hours prior to commencing land-disturbing activities.
- Notice of Termination (NOT): Upon project completion, the GC files a Notice of Termination (NOT) with FDEP. To qualify for NOT filing, the jobsite must achieve Final Stabilization, defined as reaching at least 70% dense perennial vegetative cover over all unpaved/disturbed areas, or employing equivalent permanent physical stabilization measures (such as concrete paving, riprap, or geotextile groundcover).
2. Stormwater Pollution Prevention Plan (SWPPP) Execution
Before submitting an NOI, the General Contractor must develop and implement a site-specific Stormwater Pollution Prevention Plan (SWPPP). The SWPPP must remain on the jobsite throughout construction and be made immediately available to FDEP or municipal inspectors upon request.
Mandatory SWPPP Components
- Site & Activity Description: Topographic site maps, drainage patterns, disturbed area boundaries, soil types, and identification of receiving water bodies.
- Best Management Practice (BMP) Layout Plan: Specific locations of structural erosion and sediment control devices.
- Pollution Prevention Measures: Controls for non-stormwater pollutants (concrete washouts, fueling stations, paint waste, sanitary waste).
- Inspection Schedule & Logs: Documented site inspection reports.
SWPPP Inspection Requirements
Under FDEP CGP rules, site inspections must be conducted by a qualified inspector holding a current Florida Stormwater, Erosion, and Sedimentation Control Inspector certification.
- Mandatory Inspection Frequency: Inspections must be performed:
- At least once every 7 calendar days; AND
- Within 24 hours of the end of any storm event that produces 0.5 inches or greater of rainfall.
- Record Retention: SWPPP plans and completed inspection logs must be retained on site during construction and kept for a minimum of 3 years after filing the Notice of Termination.
3. Best Management Practices (BMPs) & Erosion Controls
General Contractors are responsible for installing, inspecting, and maintaining temporary and permanent Best Management Practices (BMPs) to control erosion and prevent sediment transport off-site.
| BMP Control Type | Technical Specifications & Installation Standards | Maintenance & Cleanout Rules |
|---|---|---|
| Silt Fence | Synthetic filter fabric attached to wooden posts spaced max 6–10 ft apart; bottom trench buried 4–6 inches deep in soil. | Remove accumulated sediment when deposits reach 1/2 the height of the silt fence. |
| Floating Turbidity Barrier | Heavy-duty PVC curtain with flotation collar and weighted chain bottom, anchored in adjacent open water bodies (Type I, II, or III). | Inspect daily for tears or displacement; maintain until inland soil is stabilized and water clarity meets FDEP standards. |
| Stabilized Construction Entrance | Pad of 1-to-3 inch clean angular stone, minimum 50 ft long and 6 inches deep, underlain by geotextile fabric. | Top-dress with clean stone when aggregate fills with sediment to prevent tracking mud onto public roads. |
| Drop Inlet Protection | Geotextile filter fabric bags, gravel barriers, or synthetic block inserts installed around storm drain inlets. | Remove sediment after every storm event; replace clogged filter fabric immediately. |
| Concrete Washout Facility | Watertight, lined pit or prefabricated container used exclusively for truck and tool concrete slurry washings. | Empty slurry waste when container reaches 75% capacity; prevent high-pH slurry from leaching into ground. |
4. Hazardous Material & Environmental Abatement Regulations
Florida general contractors performing renovation, alteration, or demolition of existing structures must comply with federal and state environmental abatement regulations governing asbestos and lead paint.
Asbestos NESHAP & FDEP Notification (40 CFR Part 61, Subpart M)
Under the National Emission Standards for Hazardous Air Pollutants (NESHAP) administered by FDEP:
- Mandatory 10-Day Advance Notification: General Contractors must submit written notification to FDEP at least 10 working days prior to commencing demolition of any commercial facility or residential building containing more than 4 dwelling units—regardless of whether asbestos is present or absent!
- Regulated Asbestos-Containing Material (RACM): Materials containing greater than 1% asbestos. RACM must be abated by a licensed Florida Asbestos Abatement Contractor prior to structural demolition.
EPA Lead-Based Paint Renovation, Repair, and Painting (RRP) Rule
For renovation work on structures built prior to 1978 (target housing and child-occupied facilities):
- Contractors must be EPA Lead-Safe Certified.
- Work areas must employ containment plastic sheeting, HEPA-vacuum dust collection, and prohibition of open-flame burning or high-speed power sanding without HEPA containment.
- Mandatory cleaning verification wipes must pass clearance standards before turning the site back to occupants.
Under the FDEP NPDES Construction Generic Permit (CGP), how frequently must a certified stormwater inspector conduct site inspections on a 4-acre commercial project?
Under EPA NESHAP regulations enforced by FDEP, how many working days in advance must a General Contractor submit written notification before starting demolition of a commercial building?
What is the minimum ground surface condition required for a General Contractor to submit a Notice of Termination (NOT) for an FDEP Construction Generic Permit?