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Waste and Contaminated Land Order 1997
NI-wide·Technical Booklet C Site Preparation and Resistance to Contaminants and Moisture
Waste and Contaminated Land (Northern Ireland) Order 1997 This Order sets out the regime for identifying and remediating contaminated land and within the context of 'proposed development' this regime
site-planningcontaminated-landFlood Risk Planning Policy
NI-wide·Technical Booklet C Site Preparation and Resistance to Contaminants and Moisture
Planning (Northern Ireland) Order 1991 Development in areas of flood risk is regulated by the Northern Ireland Planning Service under the Planning (Northern Ireland) Order 1991. The planning policy in
flood-risksite-planningFlood Risk Material Consideration
NI-wide·Technical Booklet C Site Preparation and Resistance to Contaminants and Moisture
Flood risk The susceptibility of land to flooding is a material consideration which is taken into account by the Northern Ireland Planning Service in determining planning applications. There is a pres
flood-risksite-planningDefinitions – Contaminant
25(3)NI-wide·Technical Booklet C Site Preparation and Resistance to Contaminants and Moisture
"Contaminant" includes any substance which is or could become corrosive, explosive, inflammable, radioactive or toxic and includes deposits of faecal or animal matter;
site-planningSite preparation and resistance to contaminants
26NI-wide·Technical Booklet C Site Preparation and Resistance to Contaminants and Moisture
The site of a building and the ground adjacent to it shall be prepared and treated, and measures shall be taken, so as to prevent, as far as reasonably practicable, any harmful effect on the building
dwellingnon-domesticsite-planningSubsoil drainage
27NI-wide·Technical Booklet C Site Preparation and Resistance to Contaminants and Moisture
The site of a building and the ground adjacent to it shall be drained as far as reasonably practicable, or the building otherwise protected so as to prevent any harmful effect on the building or the h
dwellingnon-domesticdrainagesite-planningSite preparation and resistance to contaminants - Performance
0.1, 0.2NI-wide·Technical Booklet C Site Preparation and Resistance to Contaminants and Moisture
It is the view of the Department that the requirements of regulation 26(1) will be met by making reasonable provisions to prevent harmful effects on the building and to secure the health and safety of
dwellingsite-planningIntroduction to site preparation provisions
0.3NI-wide·Technical Booklet C Site Preparation and Resistance to Contaminants and Moisture
The guidance in Section 2 is to ensure that the site is prepared and treated to prevent harmful effect on the building and on the health and safety of the occupants by requiring an appropriate site in
site-planningdrainageIntroduction to radon protection provisions
0.4NI-wide·Technical Booklet C Site Preparation and Resistance to Contaminants and Moisture
The guidance in Section 3 is to ensure that where a dwelling is located in the radon risk category of 1-3% or any category above this risk on the radon map in 'Radon in Dwellings in Northern Ireland:
dwellingsite-planningSubsoil drainage - Performance
0.5NI-wide·Technical Booklet C Site Preparation and Resistance to Contaminants and Moisture
It is the view of the Department that the requirements of regulation 27 will be met if the site of the building and the ground adjacent to it is drained by subsoil drainage as far as reasonably practi
drainagesite-planningSubsoil drainage and groundwater control
0.6NI-wide·Technical Booklet C Site Preparation and Resistance to Contaminants and Moisture
The guidance in Section 4 is to prevent harmful effect on the building and the health of occupants by any existing active subsoil drainage which is disturbed by the development and then requiring the
drainagesite-planningSite Investigation Stages
2.1NI-wide·Technical Booklet C Site Preparation and Resistance to Contaminants and Moisture
The nature and extent of site preparation will depend on the findings of the site investigation. The site investigation (relevant to Sections 2, 3 and 4 of this Technical Booklet) should consist of a
site-planningstructuralExtent and Level of Site Investigation
2.2NI-wide·Technical Booklet C Site Preparation and Resistance to Contaminants and Moisture
The extent and level of investigation needs to be tailored to the type of development and the previous use of land. Typically the site investigation should include susceptibility to ground water level
site-planningstructuralCombined Geotechnical and Geoenvironmental Investigation
2.3NI-wide·Technical Booklet C Site Preparation and Resistance to Contaminants and Moisture
Where the site is potentially affected by contaminants, a combined geotechnical and geoenvironmental investigation should be considered. Guidance on sites affected by contaminants is given in Section
site-planningSite Investigation Report Submission
2.4NI-wide·Technical Booklet C Site Preparation and Resistance to Contaminants and Moisture
Where a site investigation report has been produced, a copy of the report should be given to the district council to facilitate the assessment of the submission.
site-planningRemoval of vegetable matter from ground
2.5NI-wide·Technical Booklet C Site Preparation and Resistance to Contaminants and Moisture
Vegetable matter such as turf and roots should be removed from the ground to be covered by the building at least to a depth to prevent later growth. The harmful effect that vegetation roots may have o
site-planningprotection-from-fallingAssessment of existing site infrastructure
2.6NI-wide·Technical Booklet C Site Preparation and Resistance to Contaminants and Moisture
On sites previously used for buildings, consideration should be given to the presence of existing foundations, services, buried tanks and any other infrastructure that could endanger persons in and ab
site-planningstructuralAssessment of fill and made ground
2.7NI-wide·Technical Booklet C Site Preparation and Resistance to Contaminants and Moisture
Where the site contains fill or made ground, consideration should be given to its compressibility and its potential for collapse on wetting, and to appropriate remedial measures to prevent damaging di
site-planningstructuralIntroduction to site contamination
3.1-3.2NI-wide·Technical Booklet C Site Preparation and Resistance to Contaminants and Moisture
A wide range of solid, liquid and gaseous man-made contaminants can arise on sites, especially those that have had a previous industrial or commercial use. Other sites, with a generally rural use such
site-planningnon-domesticdwellingApplication of regulation 26(1) - presumption of clean sites
3.3NI-wide·Technical Booklet C Site Preparation and Resistance to Contaminants and Moisture
The application of regulation 26(1) is based on the presumption that the area of the land within the boundary of the site will be free from contaminants. It may be that the site was not contaminated o
site-planningDistrict council powers for contamination - radon and discovery during construction
3.4NI-wide·Technical Booklet C Site Preparation and Resistance to Contaminants and Moisture
The only active use of the district council's power to deal with contaminants is in relation to the risk of radon ingress in dwellings where dwellings in a designated radon affected area are required
dwellingsite-planningMan-made contaminants and planning considerations
3.13NI-wide·Technical Booklet C Site Preparation and Resistance to Contaminants and Moisture
Man-made contamination, or the potential for it, is a material planning consideration which is taken into account by the Northern Ireland Planning Service in determining planning applications. Where p
site-planningExamples of sites likely to contain contaminants
Table 3.2NI-wide·Technical Booklet C Site Preparation and Resistance to Contaminants and Moisture
Examples of sites likely to contain contaminants are given in Table 3.2. Animal and animal products processing works Asbestos works Ceramics, cement and asphalt manufacturing works Chemical works Doc
industrialcommercialsite-planningIdentifying suspected contaminants during construction
3.14, 3.15NI-wide·Technical Booklet C Site Preparation and Resistance to Contaminants and Moisture
There may be some occasions when a site containing contaminants has not been identified at planning stage, and the presence of contaminants is suspected later. Some signs indicating the possible prese
site-planningdrainageDistrict council powers to require site remediation
3.16NI-wide·Technical Booklet C Site Preparation and Resistance to Contaminants and Moisture
Where contamination of a site is discovered during the building process, regulation 26(1)(b) empowers the district council to require the site to be remediated to a state suitable for the proposed dev
site-planningdrainageExamples of possible contaminants
Table 3.3NI-wide·Technical Booklet C Site Preparation and Resistance to Contaminants and Moisture
Table 3.3 Examples of possible contaminants Signs of possible contaminants | Possible contaminant Vegetation (absence, poor or unnatural growth) | Metals, Metal compounds, Organic compounds, Gases (
site-planningdrainageSubsoil drainage - general provisions and flooding assumptions
4.1, 4.2NI-wide·Technical Booklet C Site Preparation and Resistance to Contaminants and Moisture
4.1 The provisions that follow assume that the site of the building and the ground adjacent to it is not subject to flooding. 4.2 Where the water table can rise to within 250 mm of the lowest damp pr
drainagesite-planningExisting subsoil drains passing under buildings
4.3NI-wide·Technical Booklet C Site Preparation and Resistance to Contaminants and Moisture
4.3 If the route of an existing active subsoil drain would pass under the building it should be – (a) relaid in pipes with sealed joints and have access points before and after it passes under the bui
drainagesite-planningGround water affecting ground stability and properties
4.4NI-wide·Technical Booklet C Site Preparation and Resistance to Contaminants and Moisture
4.4 Where there is a risk that ground water beneath or around the building could adversely affect the stability and properties of the ground, either the ground to be covered by the building should be
drainagestructuralsite-planningGround water alteration during excavation and water-borne contaminants
4.5NI-wide·Technical Booklet C Site Preparation and Resistance to Contaminants and Moisture
4.5 General excavation work for foundations and services can alter the passage of ground water which flows through the site. Where water borne contaminants are present in the ground, either the ground
drainagesite-planningLow-lying buildings and basements - foul water backflow
4.6NI-wide·Technical Booklet C Site Preparation and Resistance to Contaminants and Moisture
4.6 For protecting low lying buildings or basements from localised backflow where foul water drainage also receives rainwater, information is provided in CLG Approved Document H Drainage and waste dis
drainagesite-planningDrain and sewer blockages - sewage backflow prevention
4.7NI-wide·Technical Booklet C Site Preparation and Resistance to Contaminants and Moisture
4.7 Blockages in drains and sewers may lead to backflow of sewage into buildings. Information on preventing backflow is given in CIRIA publication C506 Low-cost options for prevention of flooding from
drainagesite-planningDrainage and ground level requirements beneath slab
5.18NI-wide·Technical Booklet C Site Preparation and Resistance to Contaminants and Moisture
To prevent water collecting on the ground below slab, either the top of the ground below slab should be entirely above the highest level of the adjoining ground or, on sloping sites, drainage should b
drainagesite-planningExternal solid walls in severe exposure conditions
6.10NI-wide·Technical Booklet C Site Preparation and Resistance to Contaminants and Moisture
An external solid wall in conditions of "severe exposure" should be constructed with – (a) brickwork or stonework at least 328 mm thick, dense aggregate concrete blockwork at least 250 mm thick, or li
site-planningprotection-from-fallingexternal-spaceExternal solid walls in very severe exposure conditions
6.10NI-wide·Technical Booklet C Site Preparation and Resistance to Contaminants and Moisture
An external solid wall in conditions of "very severe exposure" should be protected by external impervious cladding.
site-planningprotection-from-fallingexternal-spaceAlternative construction guidance for external solid walls
6.12NI-wide·Technical Booklet C Site Preparation and Resistance to Contaminants and Moisture
The requirement can also be met by following the relevant recommendations of BS 5628-3. This code describes alternative constructions to suit the severity of the exposure and the type of brick or bloc
site-planningBritish Standards Referenced in Technical Booklet C
Appendix Publications referred toNI-wide·Technical Booklet C Site Preparation and Resistance to Contaminants and Moisture
British Standards (BS) BS EN 998-2: 2003 Specification for mortar for masonry. Masonry mortar. BS EN 13914-1:2005 Design, preparation and application of external rendering and internal plastering. Ext
drainagemoisturesite-planningaccessibility