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27.1 Pollution involves the introduction of harmful contaminants into the environment, which can include noise, light and vibration, as well as substances such as chemicals and certain gases. Pollution can have a major impact on health, amenity, natural resources, wildlife, heritage assets and quality of life, potentially compromising the success and sustainability of Salford and its individual neighbourhoods.
27.2 Development can lead to the emission of pollutants to the atmosphere, land or watercourses, both during construction and through the operation of the completed scheme. Hence, it is important that the planning system is used to complement other regulatory mechanisms for controlling pollution. A development will not automatically be acceptable in planning terms simply because it meets minimum statutory requirements under pollution control regimes, and the broader acceptability of any potential pollution impacts will need to be carefully assessed.
27.3 There are some existing pollution challenges in Salford, with parts of the city designated as an air quality management area (see Figure 22 in the Air Quality chapter), some of the waterways having a relatively poor ecological and/or chemical status, and land contamination presenting problems on some sites. Residential amenity can be harmed significantly by many forms of pollution, including noise, odour and vibration. It can also be affected by light pollution, as can the normal routines of plants and animals.
27.4 Minimising pollution impacts as far as possible is therefore essential, however, there may be circumstances where it is impossible to avoid small increases in pollution, and such increases may be considered acceptable when balanced against the benefits that would result from development.
27.5 Where there are already significant levels of pollution, or likely to be in the future as a result of development proposals, it will be necessary to control the type and form of new developments to ensure that no unacceptable levels of risk or nuisance result. This will be particularly important for sensitive uses such as residential uses, schools and hospitals where the occupiers are at particular risk from the effects of pollution due to their health, age or the potential time length of exposure to that pollution. The sensitivity of uses also extends to industrial processes and utilities infrastructure that require specific operating conditions that could be compromised by certain types or levels of pollution.
27.6 New development will not be appropriate where, due to its sensitivity to pollution, it would prejudice the continuation of other important land uses such as businesses and community facilities (including places of worship, public houses, music venues and sports clubs). This issue is specifically referred to in other policies of the plan relating to the protection of existing employment areas (Policy EC6) and cultural activities (Policy CT2).
27.7 The type of mitigation that may be required to make a development acceptable in terms of pollution will be dependent on its form, location and context. Restrictions on the layout of buildings, or the need for non-opening windows and mechanical ventilation, may impact directly on building design. Green infrastructure such as trees and hedges can be effective in relation to air, water and noise pollution, as well as having wider benefits for quality of life, biodiversity and recreation, and may need to be incorporated both within and outside the site. Measures targeted at mitigating other impacts, such as minimising the traffic impacts of developments and maximising the use of sustainable modes of transport, could also assist in addressing pollution issues.
Development shall minimise and mitigate pollution during both the construction and operational phases of development. Development will not be permitted where it would result in unacceptable levels of pollution, either individually or cumulatively with other existing or proposed developments, or would itself be subject to unacceptable levels of pollution.
The acceptability of likely pollution levels, during both the construction and operational phases of development, will be determined having regard to:
Where appropriate, conditions or planning obligations will be used to ensure that during construction and through the operation of completed development:
This policy applies to all types of pollution, including that relating to:
27.8 The production and use of hazardous substances is a crucial part of the local and national economy. However, by definition, hazardous substances have the potential to cause significant harm to the public and the built environment if there is an accident involving them, and it is therefore essential that the location of associated facilities is carefully controlled. In doing so, it will be important to consider the constraints that a hazardous use could apply to the positive future use of surrounding sites, rather than just the impact on existing uses.
Applications for hazardous substances consent, and developments involving the use of hazardous substances, will only be permitted where:
27.9 Where hazardous installations already exist, it is necessary to carefully control development that takes place nearby them so as to ensure that the public is not put at an unnecessary level of risk. This does not automatically preclude development within the safety zones around hazardous installations, even if this would significantly increase the number of people that would be at risk in the event of a major accident. However, the resultant risk must be acceptable and manageable, and this will affect the type and scale of development that is appropriate in some locations.
Development will not be permitted near hazardous installations where it would result in an unacceptable increase in the risk or consequences of a major accident.
In determining whether there would be an unacceptable risk, regard will be had to:
27.10 Problems of land instability have generally been quite limited in Salford in recent years, partly due to careful controls over development. However, the significant levels of past mining activity have left a legacy of mine and ventilation shafts, other openings and areas of potential instability. Furthermore, the city’s peatlands have distinct physical characteristics that require appropriate construction techniques and land management to ensure that any development does not suffer from subsidence.
27.11 Applicants for planning permission will need to submit sufficient information to enable the city council to properly determine the risk of land instability and the appropriateness of any proposed mitigation measures. The Coal Authority has identified parts of the city as Coal Mining Development Areas, where planning applications, excluding householder developments, should include a Coal Mining Risk Assessment.
Development will not be permitted where it would, during either its construction or operational phases:
27.12 Pollution-related indicators are included in other chapters of the plan, such as the extent of the air quality management area in the Air Quality chapter, and the percentage of surface water bodies of at least good ecological status or potential in the Water chapter.