Ameer Randolph
Underground storage tanks (USTs) are used for various purposes, including rainwater collection, well-water storage, and fire protection. While they offer several benefits, USTs can also pose significant risks to the environment and human health if they leak or fail. To address these concerns, governments and regulatory agencies have implemented various measures, including inspections, record-keeping, and cleanup programs. This report aims to provide an overview of the regulations governing USTs, the potential hazards associated with their use, and the steps taken to mitigate these risks. By examining these aspects, we can gain a comprehensive understanding of the complexities surrounding the use of underground fuel storage tanks and explore strategies to balance their benefits with potential environmental and health impacts.
| Characteristics | Values |
|---|---|
| Definition | A tank or a combination of tanks and connected underground piping having at least 10% of their combined volume underground. |
| Regulations | Federal regulations apply only to UST systems storing petroleum or certain hazardous substances. |
| Exclusions from Federal Regulations | Farm and residential tanks of 1,100 gallons or less capacity holding motor fuel for non-commercial use; tanks storing heating oil used on the premises where it is stored; tanks on or above the floor of underground areas; septic tanks and systems for collecting stormwater and wastewater. |
| Recordkeeping Requirements | Owners must maintain records of leak detection performance and maintenance, including the previous year's monitoring results and the most recent tightness test. |
| Inspection Requirements | All regulated USTs must be inspected every three years. |
| Cleanup Requirements | The Leaking Underground Storage Tank (LUST) Trust Fund oversees and enforces cleanups by responsible parties, providing funds when necessary. |
| Environmental and Health Risks | The greatest potential hazard from a leaking UST is the contamination of groundwater, which is the source of drinking water for nearly half of all Americans. Leaking USTs can also pose fire and explosion risks. |
| Uses | Underground storage tanks are used for rainwater collection and storage, well-water storage, cooling towers, air conditioning condensate, fire protection, and storing greywater. |
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What You'll Learn
The uses of underground fuel storage tanks
Underground fuel storage tanks (USTs) are used to store petroleum products or other hazardous substances. As of September 2021, the EPA reported approximately 540,000 active petroleum USTs and 2,700 USTs containing other hazardous substances. These tanks are regulated by federal and state authorities to prevent leaks and spills that can contaminate groundwater and cause other environmental and health risks, including fires and explosions.
USTs are commonly used at filling stations for the public and private filling stations used by fleet service operators and local governments. They are also found at residential properties, typically for septic systems or storing heating oil.
USTs are defined as tanks or a combination of tanks with connected underground piping, having at least 10% of their combined volume underground. The federal UST regulations apply specifically to systems storing petroleum or certain hazardous substances. However, some types of tanks are exempt from these regulations, including farm and residential tanks with a capacity of 1,100 gallons or less for non-commercial purposes, tanks storing heating oil for on-site use, and tanks above the floor of underground areas like basements.
The EPA has developed technical, financial, and state program approval requirements for USTs to address the risks associated with leaking tanks. These regulations include leak detection, corrective actions, and financial responsibility for owners and operators. UST owners and operators are responsible for reporting and addressing any releases from their tanks. Regular inspections and maintenance are also crucial to ensure the safe operation of UST systems.
In summary, underground fuel storage tanks serve the critical purpose of storing large quantities of fuel for various commercial and residential applications. However, due to the potential environmental and safety hazards associated with fuel storage, strict regulations and reporting requirements govern their use and maintenance.
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Regulations and compliance
Underground storage tanks (USTs) are subject to various regulations and compliance requirements, which can vary depending on the location and the type of tank. Here is an overview of the key regulations and compliance standards:
Federal Regulations
The US Environmental Protection Agency (EPA) has the authority to regulate USTs under the Energy Policy Act of 2005, which amended Subtitle I of the Solid Waste Disposal Act. The EPA's regulations focus on preventing releases from USTs, detecting leaks and spills, and ensuring prompt cleanup. The EPA's technical requirements for USTs include leak detection and enforcement provisions, with all regulated USTs required to be inspected every three years. The EPA also developed grant guidelines regarding operator training, inspections, delivery prohibition, secondary containment, and financial responsibility.
State and Local Regulations
While federal UST regulations apply to tanks storing petroleum or certain hazardous substances, some types of tanks are exempt, including farm and residential tanks of 1,100 gallons or less capacity holding motor fuel for non-commercial purposes and tanks storing heating oil used on the premises. However, state and local regulatory agencies may have their own regulations for these exempt tanks. For example, states like Florida and Pennsylvania have their own regulations and compliance programs for USTs, with specific requirements for registration, inspection, and maintenance.
Industry Standards and Recommended Practices
In addition to federal and state regulations, there are industry standards and recommended practices for USTs. These include API Recommended Practices, ASTM standards, and NFPA standards, which cover various aspects of UST installation, operation, maintenance, and closure. For instance, API Recommended Practice 1631 covers the interior lining of underground storage tanks, while ASTM E 1599 provides guidance for corrective action in the event of petroleum releases.
Compliance and Enforcement
Compliance with UST regulations is ensured through inspections, record-keeping, and enforcement actions. UST owners and operators are responsible for maintaining records that demonstrate compliance with applicable requirements, including leak detection and maintenance activities. Regulatory agencies, such as the EPA and state-level departments of environmental protection, conduct inspections and enforce compliance through measures such as shutdowns of installations that do not meet the required standards.
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Maintenance and safety
Underground storage tanks (USTs) are essential components for reliable fuel supply. However, they come with several maintenance and safety challenges. Firstly, underground leaks are difficult to detect and expensive to clean up. A fuel leak can affect freshwater sources and cause an environmental disaster. Therefore, it is crucial to have systems in place to reduce the risk of spills and leaks.
UST owners and operators are responsible for reporting and cleaning up any releases. To facilitate this, records of leak detection performance and maintenance must be kept. These records must include the previous year's monitoring results and the most recent tightness test. Additionally, within 30 days of repairing any spill or overfill prevention equipment, owners and operators must test or inspect the equipment to ensure it is functioning correctly.
USTs must also comply with various regulations and industry standards. In the United States, the Environmental Protection Agency (EPA) has developed regulations and guidelines for USTs, including technical requirements designed to reduce the chance of releases, detect leaks and spills, and ensure prompt cleanup. These regulations were revised in 2015, and certain types of tanks are exempt from federal UST regulations, including farm and residential tanks of 1,100 gallons or less capacity holding motor fuel for noncommercial purposes. However, state and local regulatory authorities may have their own regulations for these exempt tanks.
To ensure safety and compliance, it is essential to select a qualified tank testing service with relevant qualifications. Proper installation and maintenance can also help extend the life of a UST, which typically lasts 20 to 30 years. Regular maintenance tasks, such as those outlined in the Storage Tank Modification and Maintenance Issues guidelines, are crucial to the safe operation of USTs.
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Reporting leaks and spills
The release of fuel from an underground storage tank can contaminate the surrounding soil, groundwater, or surface waters, or affect indoor air spaces. Therefore, it is essential to report leaks and spills promptly to prevent further environmental damage and ensure the safety of nearby communities. Here are some guidelines and regulations regarding the reporting of leaks and spills from underground fuel storage tanks:
Reporting Requirements
In the United States, the Environmental Protection Agency (EPA) has established regulations for underground storage tanks (USTs) to prevent and mitigate the impact of leaks and spills. The EPA's regulations apply to UST systems storing petroleum or certain hazardous substances. Owners and operators of USTs are responsible for reporting and cleaning up any releases.
Timeframe for Reporting
In the case of a spill or overfill of petroleum that exceeds 25 gallons or causes a sheen on nearby surface water, the owner or operator must report the incident to the implementing agency within 24 hours. This report should include details such as the source and cause of the release, which will be used to determine the appropriate corrective actions.
Investigation and Assessment
Upon reporting a leak or spill, owners and operators must investigate and confirm whether a release has occurred by conducting system tests and taking samples from suspected areas. This investigation should also assess the potential impact on human health and the environment, including the extent of contamination in soils and groundwater. The regulatory authority may require additional site studies to be conducted.
Corrective Action Plan
Once a release is confirmed, appropriate abatement measures must be taken. The owner or operator must implement a corrective action plan, which may include monitoring, evaluating, and reporting the results to the implementing agency. The plan may involve remedial technologies and compliance points, such as groundwater monitoring wells, to ensure the effective cleanup of the contaminated site.
Recordkeeping
UST owners are required to maintain records that demonstrate compliance with regulatory requirements. These records should include leak detection performance, maintenance activities, monitoring results, and tightness tests. Proper recordkeeping helps track the condition of UST systems and facilitates prompt action in the event of a leak or spill.
State and Local Regulations
It is important to note that state and local regulatory agencies may have their own regulations and requirements for USTs. For example, some states may regulate farm and residential tanks below a certain capacity or tanks storing heating oil used on the premises. Therefore, owners and operators should refer to their specific state and local guidelines to ensure compliance with all applicable regulations.
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Environmental impact
Underground storage tanks (USTs) are used to store liquids like petroleum products, chemicals, and hazardous materials beneath the ground's surface. They are typically constructed from materials such as steel, fiberglass, or reinforced plastic to withstand the pressure exerted by the surrounding soil and groundwater.
USTs have the potential to negatively impact the environment if they are not properly maintained or if they leak. Leaking USTs can contaminate soil and groundwater, posing risks to human health and the environment. To address this issue, the US Environmental Protection Agency (EPA) has developed regulations and research initiatives to minimize the environmental impact of USTs.
The environmental impact of USTs is mainly related to the potential for leaks and the subsequent contamination of soil and groundwater. Here are some key points regarding the environmental impact of USTs:
- Leakage Risk: Until the mid-1980s, most USTs were made of bare steel, which is prone to corrosion over time. Corrosion can lead to leaks, allowing the tank's contents to escape into the surrounding soil and groundwater.
- Soil and Groundwater Contamination: The greatest hazard from a leaking UST is the contamination of soil and groundwater. Petroleum and other hazardous substances can seep into the soil and affect water sources for drinking and agriculture.
- Health and Environmental Risks: Leaking USTs pose health and environmental risks, including the potential for fires and explosions. Contaminated water can have adverse effects on ecosystems and human health.
- Regulatory Response: In response to the nationwide problem of leaking USTs, Congress passed a series of laws to protect human health and the environment. The EPA has been granted the authority to regulate USTs and has developed technical standards for tank design, installation, leak detection, and spill control.
- Research and Remediation: The EPA conducts research to study techniques for remediating contaminated soil and groundwater. They are also developing tools to identify vulnerable groundwater wells and create a groundwater vulnerability model to assist in triage site cleanups and assess potential impacts.
- Alternative Fuels: The EPA is also assessing the compatibility of alternative and emerging fuels with UST systems. Some biofuels and emerging fuels may be incompatible with UST components, leading to leaks and environmental releases of automotive fuels.
- State and Local Regulations: In addition to federal regulations, states and local regulatory agencies may have their own rules for USTs. These regulations can vary and may include specific requirements for reporting, record-keeping, and cleanup responsibilities.
In summary, the environmental impact of USTs is a critical consideration, and proper maintenance, regulation, and research are essential to minimize the potential risks associated with leaks and contamination. By adhering to safety standards and utilizing appropriate materials, the environmental impact of USTs can be mitigated, ensuring the protection of human health and ecosystems.
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Frequently asked questions
UST stands for Underground Storage Tank, which is a tank or a combination of tanks and connected underground piping having at least 10% of their combined volume underground.
Federal regulations apply only to UST systems storing either petroleum or liquids that are harmful to the environment. The EPA estimates that there are fewer than 10,000 tanks across the US that hold hazardous substances governed by UST regulations.
The greatest potential hazard from a leaking UST is the contamination of groundwater, which is the source of drinking water for nearly half of all Americans. Leaking USTs can also present other health and environmental risks, including the potential for fire and explosion.
UST owners and operators are responsible for reporting and cleaning up any releases. In Iowa, for example, owners and operators of UST systems must report a confirmed or suspected release of "regulated substances," including petroleum, within 24 hours or within 6 hours if a hazardous condition exists.
UST owners must keep records that can be provided to an inspector to prove their facility meets certain requirements. These records include leak detection performance and maintenance data, such as the previous year's monitoring results and the most recent tightness test.
