Cecily Zamora
Land contamination is a pressing issue that can arise from various human activities and natural events, such as manufacturing, waste disposal, and natural disasters. It poses significant health and environmental risks, and contaminated sites must be carefully managed to prevent harm. While there is no comprehensive data source for contaminated land, governments have implemented regulations and guidance, such as the Environmental Protection Act 1990, to address this issue. Local authorities play a crucial role in identifying and managing contaminated land, and planning considerations are essential to ensure suitable land use and prevent unacceptable risks from pollution. The responsible party for remediation is typically classified as either a Class A or Class B person, depending on their involvement in causing the contamination.
| Characteristics | Values |
|---|---|
| Definition | "Contaminated land" is any land which appears to the local authority to be in such a condition, by reason of substances in, on or under the land, that: (a) significant harm is being caused or there is a significant possibility of such harm being caused; or (b) pollution of controlled waters is being, or is likely to be, caused. |
| Causes | Manufacturing, mineral extraction, abandonment of mines, national defense activities, waste disposal, accidental spills, illegal dumping, leaking underground storage tanks, hurricanes, floods, pesticide use, fertilizer application, etc. |
| Effects | Contaminated lands can pose a variety of health and environmental hazards. Some sites pose little risk to human health and the environment, while others may expose humans or the environment to hazards. |
| Responsibility | The 'appropriate person' pays for remediation. Class A persons are those who may have caused the contamination or knowingly permitted a pollutant to be in or under the land. If these people cannot be located, responsibility may default to a Class B person, who may be the current resident or landowner. |
| Legislation | The Environmental Protection Act 1990, Planning and Environment Act 1987, Building Regulations, Environmental Permitting Regulations, Water Environment Regulations 2017 |
| Identification | Local authorities' own survey information, River Basin Management Plans, Information about previous land uses contained in the National Land Use Database, Historical ordnance survey maps, Local planning authority records, Natural England's MAGIC site |
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What You'll Learn
Environmental health hazards
One of the primary environmental health hazards associated with land contamination is the potential impact on water sources. Contaminants can leach into groundwater or nearby water bodies, leading to the contamination of drinking water supplies. This can have direct consequences for human health, as consuming contaminated water can result in various illnesses and diseases. Additionally, the contamination of water can affect aquatic ecosystems, harming plants, animals, and the overall ecological balance.
Soil contamination is another significant concern. Toxic chemicals in the soil can be taken up by plants, leading to the contamination of food crops. This can result in the indirect consumption of hazardous substances by humans and animals, causing a range of health issues. Direct contact with contaminated soil can also pose risks, as harmful substances can be absorbed through the skin or inhaled as dust or gases.
Land contamination can also lead to the release of hazardous gases and the contamination of indoor air in nearby buildings. This can pose respiratory hazards and other health risks to occupants. Furthermore, the improper handling or disposal of toxic materials on contaminated land can result in accidental releases, affecting both on-site and off-site environments and exposing humans, wildlife, and ecosystems to harmful substances.
The environmental health hazards associated with land contamination are not limited to the immediate vicinity of the contaminated site. Contaminants can migrate through soil and water, impacting areas beyond the initial contamination zone. This can result in the spread of pollutants over a large area, increasing the number of people and ecosystems at risk.
To mitigate these environmental health hazards, it is crucial to identify and address land contamination through proper investigation, remediation, and regulatory measures. Responsible parties, including landowners, developers, and local authorities, should collaborate to prevent, contain, and clean up contaminated sites, thereby reducing the potential risks to human health and the environment.
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Regulatory regimes
Land contamination can occur due to a variety of intended, accidental, or natural activities and events, such as manufacturing, mineral extraction, waste disposal, accidental spills, illegal dumping, and natural disasters. As contaminated lands can pose significant health and environmental hazards, it is crucial to address and remediate them effectively.
Identification and Assessment
- Local Authorities and Environmental Agencies: In many countries, local authorities and environmental agencies play a pivotal role in identifying and addressing land contamination. For instance, in the UK, Part 2A of the Environmental Protection Act 1990 defines "contaminated land" and outlines the responsibilities of local authorities in identifying and dealing with such sites.
- Multi-Jurisdictional Efforts: In some countries, like the United States, the identification and management of contaminated lands involve multiple jurisdictions, including state and local levels. The US Environmental Protection Agency (EPA) oversees hundreds of thousands of facilities to prevent releases into communities, but no single comprehensive data source tracks the full extent of contaminated land in the country.
- Information Sources: Various information sources help establish the likelihood of contamination. These include local authorities' survey information, River Basin Management Plans, the National Land Use Database, historical ordnance survey maps, local planning authority records, and environmental statements.
Remediation and Cost Allocation
- Regulatory Enforcement: Regulatory regimes, such as the Environmental Protection Act 1990 in the UK, introduce a regulatory regime for land quality enforcement by Local Authorities and the Environment Agency.
- Voluntary Agreements: In some cases, local councils may liaise with the liable person to create a voluntary agreement to take action and remediate the contaminated site.
- Cost Allocation: When land is contaminated, the 'appropriate person' is responsible for the cost of remediation. Class A persons include those who may have caused the contamination or knowingly permitted pollutants. If Class A persons cannot be located, responsibility may fall to Class B persons, such as the current resident or landowner.
Planning and Development
- Planning Considerations: Planning guidelines often address land contamination to ensure suitable site selection and prevent unacceptable risks from pollution. For instance, the UK's Planning and Environment Act 1987 provides guidance to planners and applicants on potentially contaminated land.
- Building Regulations: Regulations may require reasonable precautions to avoid health and safety risks from contaminants. For instance, the UK's Building Regulations aim to prevent risks from contaminants in the ground that will be covered by buildings.
- Environmental Permitting: In certain cases, an environmental permit may be required for the treatment and/or redeposit of contaminated soils, as outlined in the Environmental Permitting Regulations.
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Planning contamination
The implications of contamination for development must be carefully considered to prevent unacceptable risks from pollution. This involves identifying and assessing potentially contaminated land and taking the necessary steps to remediate or manage the contamination. Planning authorities play a crucial role in this process by evaluating the potential environmental and health impacts of proposed developments.
In many countries, there are specific regulations and guidelines in place to address planning contamination. For example, in the UK, the Environmental Protection Act 1990 provides a risk-based approach to identifying and remediating contaminated land. The Building Regulations also require reasonable precautions to be taken to avoid health and safety risks from contaminants in the ground. Similarly, Australia's Planning and Environment Act 1987 mandates that planning authorities consider the potential environmental and health impacts of planning schemes and amendments.
To aid in the assessment of planning contamination, various sources of information can be utilised. These include local authorities' survey information, river basin management plans, historical ordnance survey maps, and records from environmental organisations. Early engagement with local planning and environmental health departments is encouraged to ensure a comprehensive understanding of the contamination risks associated with a site.
By addressing planning contamination through regulatory frameworks and collaborative efforts, the risks posed to human health, the environment, and development can be mitigated. This ensures that contaminated land is safely managed or remediated, making it suitable for its intended use while protecting the surrounding ecosystem and communities.
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Contaminated land duties
Land contamination can occur due to various intended, accidental, or naturally occurring activities, such as manufacturing, mineral extraction, waste disposal, accidental spills, illegal dumping, and more. Contaminated lands can pose several health and environmental hazards, and it is essential to manage the risks associated with such sites to prevent harm to human health, wildlife, and ecological systems.
When contamination is present or suspected, individuals have a legal duty to manage and mitigate the risks arising from it under the Waste Management and Pollution Control Act 1998. This duty applies even if the contamination occurred before the individual took control of the land. It is crucial to identify potentially contaminated sites, as failing to address contamination adequately can cause harm to human health, property, and the environment, and hinder new development projects.
To comply with contaminated land duties, individuals should:
- Identify any suspected or confirmed contamination: This includes reviewing existing information about the land and conducting investigations when contamination is suspected due to specific activities, incidents, or historical land use.
- Notify the relevant authorities: In certain jurisdictions, such as the NT EPA in Australia, there is a legal obligation to notify the environmental protection agency when contamination is confirmed or when one's activities have resulted in or spread contamination.
- Engage experts for advice: Consult contaminated land management experts to ensure proper risk assessment and management.
- Comply with planning regulations: Consider the implications of contamination during the planning process for new developments to ensure the site is suitable for its intended use and to prevent unacceptable risks from pollution. This may involve following guidance provided by local governments and planning authorities, such as the Planning and Environment Act 1987 and Planning Practice Note 30: Potentially Contaminated Land.
- Take reasonable precautions during construction: Building regulations require taking reasonable precautions to avoid health and safety risks posed by contaminants in the ground, especially when constructing buildings.
- Obtain necessary permits: Environmental Permitting Regulations may require an Environmental Permit for treating and redepositing contaminated soils.
By fulfilling these duties, individuals can help minimize the potential harm caused by land contamination and ensure the safety of human health and the environment.
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Contaminant exposure
Land contamination can arise from diverse activities, encompassing both intentional and unintentional actions, as well as natural occurrences. Examples include manufacturing processes, mineral extraction, waste disposal, accidental spills, illegal dumping, and natural disasters such as hurricanes and floods. Contaminants can also result from the improper handling or disposal of toxic and hazardous materials, including pesticides and fertilizers.
The exposure to contaminants can occur through multiple routes, primarily through the inhalation of contaminated dust or gases, direct skin contact with contaminated soil or dust, and the ingestion of food grown on contaminated land. Additionally, contaminated soils can leach toxic chemicals into nearby groundwater or surface waters, leading to the contamination of drinking water sources and potential volatilization, causing indoor air pollution in nearby buildings.
The implications of contaminant exposure can vary depending on the level and nature of the contamination. Some sites with low levels of contamination may pose minimal risk to human health and the environment due to limited exposure to toxic substances. However, other sites with higher levels of contamination or the presence of specific chemicals can be of significant concern. These sites require careful management through containment or cleanup operations to prevent harm to human health, ecological systems, and the wider environment.
To address contaminant exposure, various sources of information can be leveraged to assess the likelihood of contamination. These include local authorities' survey information, river basin management plans, historical ordnance survey maps, local planning authority records, and information on previous land uses from databases such as the National Land Use Database. Early engagement with local planning and environmental health departments is crucial when applying for planning permissions on potentially contaminated land.
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Frequently asked questions
Contaminated land is defined by Part IIA of the Environmental Protection Act 1990 as: “Contaminated land” is any land which appears to the local authority in whose area it is situated to be in such a condition, by reason of substances in, on or under the land, that: (a) significant harm is being caused or there is a significant possibility of such harm being caused; or (b) pollution of controlled waters is being, or is likely to be, caused.
Land contamination can result from a variety of intended, accidental, or naturally occurring activities and events such as manufacturing, mineral extraction, abandonment of mines, national defense activities, waste disposal, accidental spills, illegal dumping, leaking underground storage tanks, hurricanes, floods, pesticide use, and fertilizer application.
Only a specific investigation can establish whether contamination is present, but there are various sources of information that can be used to help establish its likelihood, including local authorities’ own survey information, River Basin Management Plans, and information about previous land uses contained in the National Land Use Database.
The 'appropriate person' pays for remediation. Class A persons are those who may have caused the contamination or knowingly permitted a pollutant to be in or under the land (e.g. developers). If these people cannot be located, responsibility may default to a Class B person, who may be the current resident or landowner.
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