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Landfill Classifications and General Requirements

Class One Landfill

Regulation 61-107.19 Part III contains the requirements for Class One Landfills. This section of the regulation addresses the general permit, general provision that are specific to these landfills, notice of intent procedures, and record keeping and reporting requirements.

Key Points on Class One Landfills

  • Operates under a general permit for disposal of land-clearing debris
  • Requires publication of a Notice of Intent in local paper and notification to the Department before operations can begin
  • Limits fill of low area to grade
  • Allows permitted mining sites to become acceptable locations for a Class One Landfill
  • Requires the retention of landfill records for three years
Buffer Requirements
Property line 50 feet
Residence, school, etc. 200 feet
Drinking water well 100 feet
Surface water bodies 100 feet
Utilities 50 feet
Right-of-ways 50 feet
Airport NA
Wetlands Compliance with USACE
Note: Existing landfills are exempt from these buffer requirements.

Guidance Documents:

Class Two Landfill

Regulation 61-107.19 Part IV establishes criteria for Class Two Landfills. These landfills may accept solid wastes for disposal that are listed in Appendix I of the regulation; solid wastes that are not on the Appendix I list but have similar properties and are approved by the Department for the facility; and/or solid wastes that test, through waste characterization, at less than ten (10) times the maximum contamination limit (MCL) per Regulation 61-58, State Drinking Water Regulation and approved by the Department for disposal at the facility.

Key Points on Class Two Landfills

  • Limits waste streams to Appendix I items without waste characterization
  • Waste that is characterized as less than 10 times the MCL and approved by the Department may be added to the permit for acceptance/disposal
  • Operational Criteria:
    • Unauthorized waste may be stored at the facility for 30-days; except that putrescible waste must be removed within 72-hours
    • States that an annual survey to determine landfill capacity used and the remaining permitted capacity may be required on a case-by-case basis
    • Requires scales -- exempts scales for facilities with less than 10,000 tons per year and on-site landfills
  • Design Criteria:
    • Requires the settlement calculations on the bottom elevation
    • Requires the DHEC to inspect the landfill prior to waste placement
    • Requires airport buffer for landfills accepting dead animals
    • Sets cap requirements at 2 feet of soil
  • Buffers Established when 'Notice of Intent to File a Permit Application' is published
  • Requires groundwater monitoring and corrective action
  • Sets post-closure (20-years)
  • Requires closure and post-closure financial assurance
Buffer Requirements
  New Regulation ISW C&D
Property line 100 Feet 100 Feet 100 Feet
Residence, school, etc. 1000 Feet 1000 Feet 1000 Feet
Drinking water well  100 Feet 500/750/1000 Feet 100 Feet
Surface water bodies 200 Feet 200 Feet 200 Feet
Utilities   50 Feet 50 Feet 50 Feet
Right-of-ways 50 Feet 50 Feet 50 Feet
Airport *  10,000 Feet (Turbojet)
   5,000 Feet ( Turboprop)
NA
NA
NA
NA
Wetlands Compliance with USACE Same Same
Requires landfill owner with a landfill within these distances to demonstrate that the landfill does not pose a bird hazard
Note:  Existing landfills are exempt from these buffer requirements.

Guidance Documents:

Class Three Landfill

Regulation 61-107.19 Part V contains criteria for landfills that accept municipal solid waste, industrial solid waste, sewage sludge, nonhazardous municipal solid waste incinerator ash and other nonhazardous waste. Hereinafter, these landfills will be referred to as Class Three landfills. Class Three landfills shall adhere to their approved Special Waste Analysis and Implementation Plan (SWAIP), per S.C. Code Section 44-96-390.

Key Points on Class Three Landfills

  • Requires waste characterization through the Special Waste Analysis and Implementation Plan
  • New requirement to inspect 10% of incoming loads
  • Landfills that were permitted as ISW Class II Landfills prior to the effective date of this regulation are exempt from design criteria provided the waste streams remain below 30 times the MCLs
  • Leachate recirculation allowed under permit modification
  • Buffers Established when 'Notice of Intent to File a Permit Application' Published
  • Notification required within 72-hours of receipt of Hazardous or PCB wastes
  • Monofills that accept coal combustion byproducts testing > 10 x MCL can be constructed with a clay liner system
  • Minimum factor safety against failure based on soil type
  • Certification testing of cap to include:
    • 1 Permeability Test/Acre
    • 4 Density/Thickness Tests/Acre
Buffer Requirements
  New Regulation MSW ISW II & III
Property line 200 Feet 100 Feet 100 Feet
Residence, school, etc. 1000 Feet 200 Feet 200 Feet
Drinking water well  500/750/1000 Feet 500/750/1000 Feet Same
Surface water bodies 200 Feet 200 Feet 200 Feet
Utilities   50 Feet 50 Feet 50 Feet
Right-of-ways 50 Feet 50 Feet 50 Feet
Airport 10,000 Feet (Turbojet)
   5,000 Feet ( Turboprop)
   6 Miles (New Landfill)
10,000 Feet (Turbojet)
   5,000 Feet ( Turboprop)
Same
Wetlands Compliance with USACE Same Same

Guidance Documents:

Structural Fills

Regulation 61-107.19 Part II contains the legal requirements for structural fills. This section of the regulation addresses the general provisions that are specific to these activities and provides permit-by-rule registration, location, design, operational and closure requirements.

Structural Fills as Defined in the Regulation

"Structural fill" means land filling for future beneficial use utilizing land-clearing debris, hardened concrete, hardened/cured asphalt, bricks, blocks, and other materials specified by the department by regulation, compacted and landfilled in a manner acceptable to the department, consistent with applicable engineering and construction standards and carried out as a part of normal activities associated with construction, demolition, and land-clearing operations; however, the materials utilized must not have been contaminated by hazardous constituents, petroleum products, or painted with lead-based paint. Structural fill may not provide a sound structural base for building purposes.

"Beneficial fill" means filling to surrounding grade, low areas or depressions in the surface of the earth to include permitted mining sites for an aesthetic benefit.

Key Points on Structural Fills

  • Must be registered with DHEC under Permit-by-rule
    • DHEC approval required to operate
    • Consistency with local zoning and SC Coastal Zone Management Plan required
  • Limits activity to 12-months or less
  • Limits size to 1 acre or less
  • Limits waste streams (the materials utilized must not have been contaminated by hazardous constituents, petroleum products, or painted with lead-based paint):
    • Hardened concrete (may include rebar)
    • Hardened asphalted concrete
    • Bricks
    • Masonry Blocks
    • Land-clearing Debris
  • Defines operational requirements:
    • Attendant on-site when operating;
    • Removal of unauthorized wastes within 48-hours;
    • Marking of fill area with stakes until site closed;
    • Unloading of materials in the fill area;
    • Slopes shall not exceed a 33%;
    • Monthly cover with 6-inches of soil;
    • No open burning at the fill area;
    • Control of odors, dust, litter, fire hazards, and vectors
    • Operated in a manner to protect water quality standards of surface and ground waters.
  • Sets closure requirement to include recording of the structural fill area on the Deed or Register
  • Exempts SCDOT right-of-way structural fill sites that are directly related to road construction
Buffer Requirements
Property line 100 Feet
Residence, school, etc. 200 Feet
Drinking water well  100 Feet
Surface water bodies 200 Feet
Right-of-ways 50 Feet
Airport  NA
Wetlands 50 Feet
Between structural fills on same property 500 Feet
Note:  Existing landfills are exempt from these buffer requirements.

More Information on Structural Fills: