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Conditionally acceptable materials (section 4.2.2 in the Guide)

Where conditionally acceptable materials are proposed to be deposited, the cleanfill should not be allowed as a permitted activity and a resource consent will be required. Requirements for the acceptance or placement of certain materials can then be described by the conditions of the consent and appropriate management plans and monitoring established. It is not expected that a cleanfill operator should make decisions on the acceptability of these types of materials, unless specifically provided for in a consent.

  • Cement (dry) and cement wastes - high pH
  • Dredging spoil - range from virgin material to highly contaminated, testing required
  • Glass fibres (including Pink Bats)
  • Mine tailings/spoil - highly variable in content, testing required
  • Plasterboard (gib/drywall) - potential for elevated sulphate in groundwater and release of hydrogen sulphide under moist, anaerobic conditions.
  • Plastic and polystyrene - large quantities may present a fire hazard
  • Low-level contaminated soils, rock, gravel, sand, clay, etc. - testing required to ensure that the material meets the definition of cleanfill.
  • Timber (natural) - will degrade over time producing leachate, potential subsidence issues.
  • Tyres - large quantities may present a fire hazard

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Last updated: 17 September 2007