BS EN 13508-1:2012 pdf download – Investigation and assessment of drain and sewer systems outside buildings Part 1 : General Requirements

BS EN 13508-1:2012 pdf download – Investigation and assessment of drain and sewer systems outside buildings Part 1 : General Requirements c) investigation as part of the development of a specification for works to implement all or part of an integrated sewer system management plan; d) the investigation of a drain or sewer system following an incident in order to determine the maintenance requirements; e) an investigation of the resilience of a drain or sewer system to various hazards or threats. 5.3 Determine the scope of the investigation The scope of the investigation should be determined, including: a) the geographical extent of the investigation; b) the level of detail at which the system is to be investigated (e.g. at strategic level of whole catchment,more detailed level of sub-catchment or detailed level of components); c) which components of the system are to be included in the investigation; d) which aspects of condition or performance are to be investigated for example: 1) protection from flooding (see EN 752:2008, 5.1.2); 2) maintainability (see EN 752:2008, 5.1.3); 3) protection of surface receiving waters (see EN 752:2008, 5.1.4); 4) protection of groundwater (see EN 752:2008, 5.1.5); 5) prevention of odours and toxic, explosive and corrosive gases (see EN 752:2008, 5.1.6); 6) prevention of noise and vibration (see EN 752:2008, 5.1.7); 7) sustainable use of products and materials (see EN 752:2008, 5.1.8); 8) sustainable use of energy (see EN 752:2008, 5.1.9); 9) structural integrity and design life (see EN 752:2008, 5.1.10); 10) maintaining the flow (see EN 752:2008, 5.1.11); 11) watertightness (see EN 752:2008, 5.1.12); 12) not endangering adjacent structures and utility services (see EN 752:2008, 5.1.13); 13) inputs quality (see EN 752:2008, 5.1.14). e) the extent to which each aspect of condition or performance is investigated; f) the interactions with other parts of drain and sewer systems; g) the external influences on the system and its components (e.g. soil conditions, traffic loads); h) the interactions with other infrastructure (e.g. other utility services, urban environment); i) the resilience of the system. The scope should be set to enable the likelihood and consequences of all significant performance deficiencies to be described. Records of past incidents and any other relevant information should be brought together and a detailed review should be carried out to establish the scope of the investigations. Past performance can be established from existing records, including: i) records of flooding incidents; ii) pipe blockage incidents;...