BS EN 14654-3:2021pdf download

BS EN 14654-3:2021pdf download.Drain and sewer systems outside buildings Management and control of activities.
BS EN 14654-3 establishes requirements for the management and control of activities in drain and sewer systems outside buildings and specifies requirements for development and implementation of work programmes, and the selection of techniques.
BS EN 14654-3 covers the management and control of drain and sewer cleaning.
It is applicable to drain and sewer systems from the point where wastewater leaves a building, roof drainage system, or paved area, to the point where it is discharged into a wastewater treatment plant or receiving water body.
Drains and sewers below buildings are included provided that they do not form part of the drainage system of the building.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
4 General
Cleaning activities in drains and sewers can be carried out pro-actively, to prevent problems occurring or to clean a drain or sewer before particular operations (e.g. an inspection or renovation work) or reactively in response to problems that have occurred.
The requirements for pro-active cleaning can be identified through a rehabilitation plan, a maintenance plan involving periodic monitoring or as part of an integrated sewer system management plan in accordance with EN 752. Consideration shall also be given to the feasibility of preventing deposition of sediments for example by rehabilitation of the sewer.
BS EN 14654-3 applies the process described in EN 14654-1 for implementing cleaning activities in the integrated drain and sewer system management plan. BS EN 14654-3 shall be used in conjunction with
EN 14654-1.
3) characteristics of the location of the sewer (e.g. aquifer protection zones, ground water level, trees, proximity of receiving water bodies);
b) condition information from inspection reports (e.g. visual inspection reports, CC’I’V reports, sediment measurements);
c) data on flows from measurements or the results of hydraulic models;
d) records of past cleaning (e.g. location of areas of persistent operational problems, working space and access constraints, effectiveness of previous techniques, personnel input and costs); and
e) performance data (e.g. sewer flooding, sewer blockages, collapses, odours, septicity problems, premature operation of combined sewer overflows, etc.).
6.3.3 Further investigations
Where there is insufficient information available to plan the cleaning programme, a programme of investigations shall be carried out to obtain the necessary information.BS-EN-14654-3-2021

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