6.3 GESA, NPDES, Buffers, BMPs & Certified Personnel

6.3 GESA, NPDES, Buffers, BMPs & Certified Personnel

Land disturbance is among the most heavily regulated phases of commercial construction in Georgia. Uncontrolled stormwater runoff carries sediment, pollutants, and heavy metals into the state's 70,000+ miles of streams, rivers, and coastal waterways. General contractors must maintain strict compliance with two interlocking environmental frameworks: the Georgia Soil Erosion and Sedimentation Act (GESA) at the state level and the National Pollutant Discharge Elimination System (NPDES) General Stormwater Permits administered by the Georgia Environmental Protection Division (GA EPD). Understanding erosion plan requirements, certification credentials, state water buffers, Best Management Practices (BMPs), and monitoring protocols is critical for avoiding stop-work orders and substantial regulatory fines.

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Statutory Framework: GESA & Local Issuing Authorities

Enacted in 1975, the Georgia Soil Erosion and Sedimentation Act (O.C.G.A. Title 12, Chapter 7) establishes a statewide program to control soil erosion, sediment deposition, and nonpoint source stormwater pollution resulting from land-disturbing activities (LDA).

                      ┌─────────────────────────────────────────┐
                      │     GEORGIA GENERAL ASSEMBLY (STATUTE)  │
                      │          O.C.G.A. § 12-7-1 et seq.       │
                      └────────────────────┬────────────────────┘
                                           │
                   ┌───────────────────────┴───────────────────────┐
                   ▼                                               ▼
   ┌───────────────────────────────┐               ┌───────────────────────────────┐
   │  GEORGIA ENVIRONMENTAL        │               │  GEORGIA SOIL & WATER         │
   │  PROTECTION DIVISION (GA EPD) │               │  CONSERVATION COMMISSION      │
   │  • NPDES Stormwater Permits   │               │  • "Green Book" BMP Manual    │
   │  • Buffer Variances           │               │  • Level 1/2 Certifications   │
   │  • State Water Enforcement    │               │  • 3-Year Renewal Programs    │
   └───────────────┬───────────────┘               └───────────────┬───────────────┘
                   │                                               │
                   └───────────────────────┬───────────────────────┘
                                           │
                                           ▼
                      ┌─────────────────────────────────────────┐
                      │     LOCAL ISSUING AUTHORITIES (LIAs)    │
                      │   (EPD-Certified Counties & Cities)     │
                      │   • LDA Permit Review & Issuance        │
                      │   • Daily/Weekly Field Enforcement      │
                      └─────────────────────────────────────────┘

Local Issuing Authorities (LIAs) vs. GA EPD Jurisdiction

• Local Issuing Authority (LIA): A county or municipality certified by the GA EPD that has adopted an erosion and sedimentation control ordinance meeting or exceeding state minimum standards. The LIA is the primary authority responsible for reviewing plans, issuing Land-Disturbing Activity (LDA) permits, conducting site inspections, and issuing stop-work orders or citations.
• GA EPD Direct Oversight: In jurisdictions where the local government has not achieved LIA certification (or where certification has been revoked due to inadequate enforcement), the Georgia EPD retains direct regulatory authority over plan reviews, permitting, and enforcement.

Land-Disturbing Activity (LDA) Permit Triggers

Under O.C.G.A. § 12-7-3(9), a Land-Disturbing Activity encompasses any land change that may result in soil erosion from water or wind and the movement of sediments into state waters or onto lands within the state, including clearing, grading, excavating, transporting, and filling. An LDA permit and an approved Erosion, Sedimentation and Pollution Control Plan (ESPCP) are legally required for:

• Any land disturbance encompassing one (1) or more acres of total ground surface;
• Any land disturbance of less than one acre if the site is part of a larger common development plan totaling one or more acres;
• Any land disturbance occurring within 200 feet of a state water regardless of project acreage.

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GSWCC Education & Certification System

The Georgia Soil and Water Conservation Commission (GSWCC) establishes education, training, and certification standards for all design professionals, inspectors, and contractors involved in land-disturbing activities. These certifications—colloquially referred to by card color—are strictly enforced on commercial jobsites:

Three-Year Recertification Mandate: All GSWCC Level 1 and Level 2 certifications are valid for exactly three (3) years from the date of examination. To maintain active certified status, individuals must complete four (4) hours of approved continuing education courses before the 3-year expiration date.

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Mandatory State Water Buffers & EPD Variance Procedures

Under O.C.G.A. § 12-7-6(b)(15), Georgia law establishes mandatory, undisturbed natural vegetative buffers along all state waters to filter sediment, stabilize stream banks, and protect aquatic ecosystems.

Definition of State Waters & Point of Wrested Vegetation

• State Waters: Any rivers, streams, creeks, branches, lakes, reservoirs, ponds, drainage systems, springs, wells, and other bodies of surface or subsurface water, natural or artificial, lying within or forming a part of the boundaries of the state.
• Point of Wrested Vegetation: The physical baseline from which buffer measurements are legally calculated. It is defined as the point along a stream bank where the regular movement of water has ceased the growth of terrestrial vegetation, creating a distinct wrested (scoured) boundary.

                  ┌─────────────────────────────────────────────────────────┐
                  │           MANDATORY STATE WATER BUFFERS                 │
                  └─────────────────────────────────────────────────────────┘
                                               │
                   ┌───────────────────────────┴───────────────────────────┐
                   ▼                                                       ▼
   ┌───────────────────────────────┐                       ┌───────────────────────────────┐
   │    WARM-WATER STATE WATERS    │                       │    DESIGNATED TROUT STREAMS   │
   │   25-FOOT UNDISTURBED BUFFER  │                       │   50-FOOT UNDISTURBED BUFFER  │
   │  Measured Horizontally from   │                       │  Measured Horizontally from   │
   │   Point of Wrested Veg.       │                       │   Point of Wrested Veg.       │
   └───────────────────────────────┘                       └───────────────────────────────┘

Buffer Standards & Dimensions

1. Warm-Water State Waters: A mandatory 25-foot undisturbed natural vegetative buffer measured horizontally from the point of wrested vegetation along both banks.
2. Designated Trout Streams: A mandatory 50-foot undisturbed natural vegetative buffer measured horizontally from the point of wrested vegetation along all primary and secondary trout streams (located predominantly in North Georgia). For minor road crossings and utility pipings, the buffer may be reduced to 25 feet under specific statutory exemptions.
3. Coastal Marshlands: A 25-foot buffer applies to coastal marshlands under the Coastal Marshlands Protection Act.

EPD Buffer Variance Procedures

No land-disturbing activity—including clearing, grading, excavating, parking heavy equipment, or stockpiling soil—is legally permitted within a state water buffer without a formal Buffer Variance issued directly by the Director of the Georgia EPD. Applying for a variance requires:

• Demonstrating that avoiding the buffer is technically impossible due to site geography;
• Submitting comprehensive hydraulic and geotechnical mitigation plans;
• Undergoing a mandatory 30-day public notice and comment period;
• Encroaching into a state buffer without an EPD variance is a major statutory violation subject to civil penalties up to $2,500.00 per day under O.C.G.A. § 12-7-15.

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NPDES General Construction Stormwater Permits (GAR100000 Series)

Under delegated authority from the U.S. Environmental Protection Agency (EPA) pursuant to Section 402 of the Federal Clean Water Act, the Georgia EPD issues and enforces the NPDES General Permits for Stormwater Discharges Associated with Construction Activity.

The Three NPDES Construction General Permits

• GAR100001 (Stand-Alone Construction): For single commercial buildings, stand-alone retail pads, and individual industrial facilities not part of a larger phased development.
• GAR100002 (Infrastructure Projects): For linear utility pipelines, roadway corridors, bridge replacements, and sewer/water line installations.
• GAR100003 (Common Development): For commercial business parks, industrial subdivisions, and multi-builder residential master-planned developments.

Notice of Intent (NOI) & Regulatory Fees

Before initiating any ground disturbance on a project disturbing one or more acres, the Primary Permittee (General Contractor or Developer) must submit an electronic Notice of Intent (NOI) through the Georgia EPD Online System (GEOS) at least fourteen (14) calendar days prior to commencing land disturbance. Permittees must pay the statutory land-disturbance fees:

Total NPDES Fee = $80.00 per Disturbed Acre Split: $40.00 / acre to GA EPD + $40.00 / acre to Local Issuing Authority (LIA)

Notice of Termination (NOT) & Final Stabilization Standard

A project remains legally bound to NPDES permit obligations—including weekly inspections and monitoring—until a formal Notice of Termination (NOT) is submitted and approved via GEOS. An NOT cannot be filed until Final Stabilization is achieved:

Statutory Definition of Final Stabilization: All soil-disturbing activities at the site have been completed, and a uniform, perennial vegetative cover with a density of at least 70% of the background vegetative cover has been established across 100% of all unpaved, cleared ground surfaces, or equivalent permanent physical stabilization (riprap, concrete paving, asphalt) has been installed.

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Best Management Practices (BMPs) & Inspection / Sampling Protocols

All erosion control practices in Georgia must comply with the engineering design specifications published in the GSWCC Manual for Erosion and Sediment Control in Georgia (widely known as "The Green Book").

Primary Structural Best Management Practices

Mandatory Inspection & Turbidity Monitoring Schedule

Under NPDES permit conditions, the General Contractor must maintain a certified on-site log documenting mandatory visual inspections and stormwater water quality sampling:

• Daily Visual Inspections: Construction exits (checking for mud track-out onto public highways) and operational state of all petroleum/chemical containment areas.
• Weekly Inspections: Comprehensive inspection of all installed BMPs, silt fences, sediment basins, and outfall discharge points every seven (7) calendar days.
• Rainfall Event Inspections: Mandatory inspection of all BMPs within 24 hours of any rainfall event measuring 0.5 inches or greater (measured using a dedicated on-site rain gauge).
• Stormwater Turbidity Sampling: Within 45 days of beginning land disturbance, the permittee must collect stormwater discharge samples during qualifying storm events and perform water quality analysis using a calibrated Nephelometer to measure Nephelometric Turbidity Units (NTUs):
  • Samples must be taken at discharge outfalls and in receiving state waters (upstream vs. downstream);
  • In-stream downstream turbidity cannot exceed upstream background levels by more than 25 NTUs for warm-water streams, or by more than 10 NTUs for designated trout streams.