ISO 24527 pdf free download

ISO 24527-2020 pdf free download.Service activities relating to drinking water supply, wastewater and stormwater systems – Guidelines on alternative drinking water service provision during a crisis.
4 Principles for alternative drinking water service provision
4.1 General
In order to determine its ADWS provision, a drinking water utility should first have a clear understanding of its normal operation during typical (non-crisis) circumstances.
During a crisis involving an interruption to drinking water distribution, the drinking water utility should ensure an ADWS is provided to users and also ensure that assets which are intended to be used in contact with drinking water are authorized by the relevant authority. Such assets could include cleaned and disinlected drinking water containers.
Ideally, users should only take containerized drinking water according to predetermined drinking water allocation(s), see Annex.C. However, in practice, with high user demand and limited drinking water utility resources available to control the issuing of drinking water, this can be difficult to achieve.
The drinking water utility’s pre-planning of issuing drinking water should aim to ensure a suitable level of control, including a contingency for excessive withdrawals. Inability to exercise such control can lead to legitimate users’ needs remaining unfulfilled. This can have consequences, including a decline in ADWS service levels and financial and reputational impacts. Drinking water utilities can encourage users to exercise restraint by providing adequate public information both in advance of and during a crisis (see Clause 7).
The required water quality for ADWS provision is determined by the relevant authorities and/or responsible bodies. However, the possible need to distribute non-drinking water through the drinking water distribution network (if necessary, and in parallel with ADWS) should also be recognized. Such a measure can be necessary for public health (e.g. toilet flushing) and public safety (e.g. firefighting) reasons. In such circumstances, the water usage constraints that need to be complied with should he strongly emphasized through stakeholder communications.
4.2 Alternative drinking water service approaches
4.2.1 General
The drinking water utility can adopt one or both of the ADWS approaches described in 4.22 and 42.3.
4.2.2 Using the drinking water distribution network in a non-conventional manner
This approach involves the drinking water utility supplying drinking water to users via the drinking water distribution network but using different means than the regular operational methods.
Proven methods of ADWS provision using the distribution network in a non-conventional manner are described in .
4.2.3 Not using the drinking water distribution network
This approach involves temporary points of distribution (TPDs being established throughout the affected service area. Examples of TPD methods are described in Annex A. The drinking water utility should, during its normal operations (i.e. prior to the onset of a crisis), have communicated to users the need to approach a TPD to receive drinking water during a crisis. This approach allows the drinking water utility to provide users with drinking water reasonably close to their normal point of use.
© ISO 2020 – All rights reserved 5
ISO 2452 7:2020(E)
Proven methods of ADWS provision not using the drinking water distribution network are described in £3.
5 Planning for alternative drinking water service provision
5.1 General
ADWS provision should form an integral part of the drinking water utility’s wider crisis management response.
During normal operation, and based on a risk assessment, the drinking water utility should identify the disruption scenarios that can lead to the need for ADWS provision and which cannot be managed by the drinking water utility’s normal organizational structures and operational means.
The drinking water utility should take into consideration that more than one approach and method can be used during a crisis. The drinking water utility should decide upon the preferred approaches and methods for ADWS provision, according to the considerations listed in 61..
The drinking water utility should prepare engineering, operational and logistical plans to implement its chosen approach(es) to ADWS provision. The methods of ADWS provision selected should be planned and exercised during times of normal operation, and responders should be appropriately trained in order to demonstrate their readiness when required.
5.2 Pre-planning
5.2.1 EstablishIng Individual disruption scenarios
The drinking water utility should take the following into consideration:
a) possible circumstances of the crisis;
b) relevant characteristics of the drinking water system of individual service areas, such as gravity fed/pumped areas; pressure zones; and water quality features/constraints;
c) characteristics of the environment of individual service areas, such as rural/urban distinctions and topographical features that provide access or act as barriers (e.g. highways, rivers, railways);
d) characteristics of the users in individual service areas;
e) its available resources (including personnel).4 Principles for alternative drinking water service provision
4.1 General
In order to determine its ADWS provision, a drinking water utility should first have a clear understanding of its normal operation during typical (non-crisis) circumstances.
During a crisis involving an interruption to drinking water distribution, the drinking water utility should ensure an ADWS is provided to users and also ensure that assets which are intended to be used in contact with drinking water are authorized by the relevant authority. Such assets could include cleaned and disinlected drinking water containers.
Ideally, users should only take containerized drinking water according to predetermined drinking water allocation(s), see Annex.C. However, in practice, with high user demand and limited drinking water utility resources available to control the issuing of drinking water, this can be difficult to achieve.
The drinking water utility’s pre-planning of issuing drinking water should aim to ensure a suitable level of control, including a contingency for excessive withdrawals. Inability to exercise such control can lead to legitimate users’ needs remaining unfulfilled. This can have consequences, including a decline in ADWS service levels and financial and reputational impacts. Drinking water utilities can encourage users to exercise restraint by providing adequate public information both in advance of and during a crisis (see Clause 7).
The required water quality for ADWS provision is determined by the relevant authorities and/or responsible bodies. However, the possible need to distribute non-drinking water through the drinking water distribution network (if necessary, and in parallel with ADWS) should also be recognized. Such a measure can be necessary for public health (e.g. toilet flushing) and public safety (e.g. firefighting) reasons. In such circumstances, the water usage constraints that need to be complied with should he strongly emphasized through stakeholder communications.
4.2 Alternative drinking water service approaches
4.2.1 General
The drinking water utility can adopt one or both of the ADWS approaches described in 4.22 and 42.3.
4.2.2 Using the drinking water distribution network in a non-conventional manner
This approach involves the drinking water utility supplying drinking water to users via the drinking water distribution network but using different means than the regular operational methods.
Proven methods of ADWS provision using the distribution network in a non-conventional manner are described in .
4.2.3 Not using the drinking water distribution network
This approach involves temporary points of distribution (TPDs being established throughout the affected service area. Examples of TPD methods are described in Annex A. The drinking water utility should, during its normal operations (i.e. prior to the onset of a crisis), have communicated to users the need to approach a TPD to receive drinking water during a crisis. This approach allows the drinking water utility to provide users with drinking water reasonably close to their normal point of use.
Proven methods of ADWS provision not using the drinking water distribution network are described in £3.
5 Planning for alternative drinking water service provision
5.1 General
ADWS provision should form an integral part of the drinking water utility’s wider crisis management response.
During normal operation, and based on a risk assessment, the drinking water utility should identify the disruption scenarios that can lead to the need for ADWS provision and which cannot be managed by the drinking water utility’s normal organizational structures and operational means.
The drinking water utility should take into consideration that more than one approach and method can be used during a crisis. The drinking water utility should decide upon the preferred approaches and methods for ADWS provision, according to the considerations listed in 61..
The drinking water utility should prepare engineering, operational and logistical plans to implement its chosen approach(es) to ADWS provision. The methods of ADWS provision selected should be planned and exercised during times of normal operation, and responders should be appropriately trained in order to demonstrate their readiness when required.
5.2 Pre-planning
5.2.1 EstablishIng Individual disruption scenarios
The drinking water utility should take the following into consideration:
a) possible circumstances of the crisis;
b) relevant characteristics of the drinking water system of individual service areas, such as gravity fed/pumped areas; pressure zones; and water quality features/constraints;
c) characteristics of the environment of individual service areas, such as rural/urban distinctions and topographical features that provide access or act as barriers (e.g. highways, rivers, railways);
d) characteristics of the users in individual service areas;
e) its available resources (including personnel).ISO 24527 pdf download.