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Specific to our operations are the environmental issues of air quality in our stations and properties and noise control on our rail lines. We employ self-initiated requirements to monitor and measure performance in these areas. Air quality is tracked regularly at all stations and commercial properties against internal KPIs that exceed both suggested Clean Air Charter targets and the voluntary Government standards. We have maintained 100% achievement over the last few years to our targets. As in previous years, in 2007 we are in full compliance with the EPD Air Quality Guideline for Air-Conditioned Passenger Transport Interchanges both in the management of indoor air quality and the technical compliance to C02 standards.
As we operate within a dense urban environment, the regulation of noise pollution from our rail lines is strictly regulated. We closely co-operate with government departments to monitor noise levels along rail routes and on project sites. Under our performance KPIs we respond to all public complaints within 72 hours and report to responsible parties on the nature and any remedial actions taken. We have maintained a zero prosecutions record for noise since before 2000.
In 2007, we recycled 100% of metals and spent oils. No spills or accidents involving hazardous waste occurred during the year.
Waste materials are principally sourced from construction activities in our rail project and network extensions. In 2007, waste output was low due to the demand in site work. A total of 4,408 in CO2 equivalent tonnes of construction waste were disposed of at landfill compared to the previous year's 4,563 tonnes.
The corporation does not track or currently have a procurement programme in place that monitors and records the use of waste used from external sources used in our operations.
Recent years' improved monitoring and management of water usage at stations and depots has produced significant efficiency improvements in consumption against targets. Effluent discharges are monitored quarterly at 158 discharge points to ensure broad-reaching and full compliance to licence requirements. In 2007, we met all requirements under out effluents discharge license.
All water used in our railway operations, mainly train and station cleaning, is treated through an on-site primary treatment by sedimentation and to remove oil and grease, after which it is discharged to government treatment centres. The grey water system in the LOHAS Park property development is being constructed. The recycled water from this plant will water the extensive green landscaping planned and clean outdoor public areas.
The Corporation does not have in place a measurement programme for recycled water, but rather addresses the issue of saving fresh water usage where appropriate. We currently use the grey water wash from the depots to clean specified pubic areas of our properties and to water plants. We use station cleaning equipment that saves on water usage and, under our energy audits, we continually monitor and upgrade equipment in our managed properties to maximise fresh water efficiencies.
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