BS 8595:2013 pdf download – Code of practice for the selection of water reuse systems
NOTE 2 The water stress level for the local catchment for the UK can be obtainedfrom Figure 3.Detailed information about availability of water and whether thelocation of interest lies in a water-stressed zone can be obtained from the local
Environment Agency office, water service providers or from the local water resourcemanagement plan.
NOTE 3 Attention is drawn to the Eu water Framework Directive [9].
5.2.2Water supply infrastructure capacity
The capacity of the local water supply infrastructure to meet current andprojected future demands should be assessed; if there is a lack of capacity, awater reuse system may be used to help meet future needs by reducing theoverall water demand.
NOTEInformation about the capacity of the water supply infrastructure to meetcurrent and future demand can be obtained from local water service providers.5.2.3 Drainage network infrastructure capacity
The capacity of the local drainage network infrastructure to meet current andprojected future demands should be assessed; if there is a lack of capacity in anarea to meet current or projected future drainage requirements (e.g. due tonew development, urban creep or observed increases in rainfall due to climatechange), a water reuse system may be used to help minimize, or be a
component part of a SuDs which prevents discharges of surface water run-off.NOTE 1 Information about the capacity of the drainage system to meet current andfuture demand can be obtained from local drainage and sewerage undertakers.
NOTE 2 National or local criteria for new surface water drainage systems are likelyto set requirements for development site run-off volumes to be controlled to
pre-development equivalents, for the 1 in 100 year event, when discharging eitherto sewerage or directly to water bodies. ln many cases, meeting this criterion mightrequire water harvesting and reuse systems for attenuation.
5.2.4Wastewater treatment works infrastructure capacity
The capacity of the local wastewater treatment works to meet current andprojected future demands should be assessed; if existing wastewater treatmentworks are unable to meet projected future requirements, a water reuse systemmay be used to help reduce the volume of wastewater entering the foul drainage system and reduce the demand on existing wastewater treatmentworks.
NOTE lInformation about capacity requirements of wastewater treatment works canbe sourced from the local sewerage undertakers.
5.2.5 Environmental impact
Information about the risk of pollution, pollution incidents and the quality ofthe relevant local water bodies should be taken into account during scoping,evaluation, planning and selecting water reuse systems.
NOTE Information about the risk of pollution can be obtained from the local
sewerage undertaker, the Environment Agency for England and Wales, the Northernlreland Environment Agency or the Scottish Environment Protection Agency (SEPA).
5.2.6 Carbon reduction targets Information about the carbon footprint of local water supply, wastewater treatment and water reuse systems should be taken into account during scoping, evaluation, planning and selecting the water reuse systems, as water reuse systems might help to reduce the amount of operational carbon consumed in the abstraction, treatment and conveyance of municipal water supply. NOTE Information about local carbon reduction targets can be obtained from the local water service providers.
5.2.7 Local planning policies Any policies adopted by the local planning authority promoting water reuse systems should be taken into account during scoping, evaluation, planning and selecting the water reuse systems.
NOTE Information about local planning policies can be obtained from the local planning authority.
5.2.8 Client requirements The client’s own reasons for selecting water reuse systems, such as a reduction in water bills, should be taken into account during scoping, evaluation, planning and selecting the water reuse systems.
5.3 Project objectives: prioritization of key considerations
Once the key considerations have been determined, the priority or priorities of the project should be identified.