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Table 1: National Landfill Census (1995 and 1998), Landfill Review and Audit Survey results (2002) and predictions for 2010
| 1995 |
1998 |
2002 |
2010 [The figures for 2010 are an estimate based on discussions with operators and waste management organisations. They also reflect that the number of landfills is presently sitting at around 90. It is expected that we will met the target number of landfills in 2010.] |
|
|---|---|---|---|---|
Total number of operating sites |
327 |
209 |
115 |
43 |
Sites with consent to operate |
- |
157 |
104 |
43 |
Low permeability underlying material [Low permeability is defined as thick clays or < 10-9m/s for this evaluation.] |
- |
10% |
15% |
42% |
| Leachate management system | ||||
Engineered liner |
- |
4% |
20% |
67% |
Leachate collection system |
13% |
35% |
47% |
88% |
Leachate recirculation |
- |
7% |
10% |
Not known |
| Stormwater management system | ||||
Stormwater diversion |
41% |
67% |
74% |
100% |
Stormwater monitoring |
- |
23% |
50% |
77% |
Stormwater treatment |
9% |
27% |
36% |
67% |
| Landfill gas management system | ||||
Landfill gas monitoring |
3% |
11% |
27% |
77% |
Landfill gas collection (flaring or beneficial use) [1998 - three electricity generation, six flare, one industrial use; 2002 - five electricity generation, six flare, one industrial use.] |
- |
5% (10) |
10% (12) |
30% (13) |
Landfill fires |
52% |
24% |
17% |
Not known |
| Hazardous waste management | ||||
Hazardous waste accepted |
33% |
20% |
- [While all sites state that they do not accept hazardous waste, the definition of hazardous waste varies. Some sites acknowledge that household waste will contain small quantities of hazardous waste.] |
Not known [It is expected that all landfills will utilise the hazardous waste definition developed by the Ministry for the Environment (www.mfe.govt.nz/issues/waste/hazardous/definition.html).] |
Documentation required |
- |
33% |
53% |
Not known |
Measuring the quantity of waste |
39% |
63% |
83% |
100% |
Charging for the disposal of waste |
- |
45% |
82% |
100% |
