| ELECTRICITY, GAS, WATER AND WASTE SERVICES: |
| Sewerage and drainage services: |
| Sewage pump station assets: |
| Detention tanks | 80 years | 2.50% | 1.25% | 1 Jan 2005 |
| Overflow screens | 25 years | 8.00% | 4.00% | 1 Jan 2005 |
| Sewage service connection assets: |
| Low pressure pumps | 25 years | 8.00% | 4.00% | 1 Jan 2005 |
| Vacuum pumps | 25 years | 8.00% | 4.00% | 1 Jan 2005 |
| Sewage treatment assets: |
| Air filtration systems | 20 years | 10.00% | 5.00% | 1 Jan 2005 |
| Air scrubbers | 10 years | 20.00% | 10.00% | 1 Jan 2005 |
| Chemical blowers | 15 years | 13.33% | 6.67% | 1 Jan 2005 |
| Chemical feeders and hoppers | 25 years | 8.00% | 4.00% | 1 Jan 2005 |
| Chemical mixers and blenders | 25 years | 8.00% | 4.00% | 1 Jan 2005 |
| Chemical storage tanks | 30 years | 6.67% | 3.33% | 1 Jan 2005 |
| Grit removal assets | 25 years | 8.00% | 4.00% | 1 Jan 2005 |
| Penstocks | 25 years | 8.00% | 4.00% | 1 Jan 2005 |
| Screenings removal assets | 25 years | 8.00% | 4.00% | 1 Jan 2005 |
| Sludge processing assets: |
| Anaerobic digesters | 80 years | 2.50% | 1.25% | 1 Jan 2005 |
| Anaerobic digester gas handling and blowing systems | 25 years | 8.00% | 4.00% | 1 Jan 2005 |
| Anaerobic digester heating systems | 25 years | 8.00% | 4.00% | 1 Jan 2005 |
| Bio-filters | 80 years | 2.50% | 1.25% | 1 Jan 2005 |
| Dissolved air flotation systems | 25 years | 8.00% | 4.00% | 1 Jan 2005 |
| Lime disinfection dosing units | 25 years | 8.00% | 4.00% | 1 Jan 2005 |
| Sludge dewatering assets: |
| Belt presses | 15 years | 13.33% | 6.67% | 1 Jan 2005 |
| Centrifuges | 20 years | 10.00% | 5.00% | 1 Jan 2005 |
| Screw conveyors | 25 years | 8.00% | 4.00% | 1 Jan 2005 |
| Screw presses | 20 years | 10.00% | 5.00% | 1 Jan 2005 |
| Sludge driers | 20 years | 10.00% | 5.00% | 1 Jan 2005 |
| Sludge heating units | 20 years | 10.00% | 5.00% | 1 Jan 2005 |
| Sludge thickening tanks (incorporating scrapers) | 80 years | 2.50% | 1.25% | 1 Jan 2005 |
| Treatment assets: |
| Primary treatment assets: |
| Primary clarifiers (incorporating scrapers) | 80 years | 2.50% | 1.25% | 1 Jan 2005 |
| Primary sedimentation lagoons | 50 years | 4.00% | 2.00% | 1 Jan 2005 |
| Primary
sedimentation tanks (incorporating scrapers and weirs) | 80 years | 2.50% | 1.25% | 1 Jan 2005 |
| Scum collection and transfer systems | 25 years | 8.00% | 4.00% | 1 Jan 2005 |
| Secondary treatment assets: |
| Biological nutrient removal (BNR) assets: |
| Aerators and blowers | 20 years | 10.00% | 5.00% | 1 Jan 2005 |
| BNR
tanks (incorporating mixed liquor stream, anoxic, anaerobic and swing
zones and diffusers) | 80 years | 2.50% | 1.25% | 1 Jan 2005 |
| Mixers | 25 years | 8.00% | 4.00% | 1 Jan 2005 |
| Secondary clarifiers (incorporating scrapers) | 80 years | 2.50% | 1.25% | 1 Jan 2005 |
| Secondary treatment lagoons | 50 years | 4.00% | 2.00% | 1 Jan 2005 |
| Secondary
treatment tanks (incorporating scrapers and weirs) | 80 years | 2.50% | 1.25% | 1 Jan 2005 |
| Sequenced batch reactors | 80 years | 2.50% | 1.25% | 1 Jan 2005 |
| Sludge aerators and blowers | 80 years | 2.50% | 1.25% | 1 Jan 2005 |
| Tertiary treatment assets: |
| Backwash air blowers | 20 years | 10.00% | 5.00% | 1 Jan 2005 |
| Chlorine contact tanks | 80 years | 2.50% | 1.25% | 1 Jan 2005 |
| Filtration tanks | 80 years | 2.50% | 1.25% | 1 Jan 2005 |
| Reverse osmosis assets: |
| Fine screening systems | 15 years | 13.33% | 6.67% | 1 Jan 2005 |
| Micro filtration units | 15 years | 13.33% | 6.67% | 1 Jan 2005 |
| Reverse
osmosis membrane filtration units | 10 years | 20.00% | 10.00% | 1 Jan 2005 |
| UV disinfectors | 25 years | 8.00% | 4.00% | 1 Jan 2005 |
| Water storage tanks | 80 years | 2.50% | 1.25% | 1 Jan 2005 |
| RENTAL, HIRING AND REAL ESTATE SERVICES: |
| Residential property operators: |
| Outdoor assets: |
| Sewage treatment assets: |
| Controls | 8 years | 25.00% | 12.50% | 1 Jul 2004 |
| Motors | 8 years | 25.00% | 12.50% | 1 Jul 2004 |