Contractors

Landfill Construction

CPL/PL

Landfill construction may include land clearing, site preparation, road construction, liner construction, leachate system construction, stormwater collection systems, gas-recovery system installation, cap construction, and many other facets of the overall landfill structure and operations. Contractors who perform this work face many environmental exposures. One of the most significant risks is related to construction errors that can result in the release of contaminants from the landfill. Land clearing and earth movement operations may cause run-off of silt and sedimentation that can carry pollutants off-site to surface water bodies or third-party properties. These operations can also generate dust, releasing particulates into the air that impact third parties. Existing underground utilities or liners could be damaged during construction activities in a landfill.

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Environmental and Professional Exposures May Include

Silt and Sediment
Pre-existing Contamination
Fugitive Dust
System Failures and Leaks
Engineering Errors
Waste Management
Cargo Securement
Equipment Fuel and Chemical Spills
Subcontractors
Field Change Risks
Errors and Omissions

Silt and Sediment

Improper erosion controls for work involving land clearing, site preparation, road construction, stormwater retention pond construction, liner construction, capping, or other landfill construction can lead to run-off of silt and sediments (fine-grained soil particulates). Rain, accidental pipe breaks, or excessive watering from dust suppression can carry these particulates off-site, impair the proper functioning of stormwater drainage systems, cause ecological damage to streams and rivers, or result in adjacent property damage. Natural resource damage or third-party claims can result. Control of silts/sediments is required under the Clean Water Act, and contractors may face regulatory action such as cleanup orders or fines and penalties from federal, state, or local regulators for mismanagement.

Pre-existing Contamination

Land that is used for the construction of a landfill can have unknown pre-existing contamination. Contractors can unknowingly spread contaminated soils to other areas of a site. Land clearing and earth movement can also impact underground utilities, including gas lines, sewage pipes, or unknown hazards such as abandoned storage and septic tanks. Accidental puncture and release of fuel oil, chemicals, or sewage can occur.

Fugitive Dust

Earth movement, land clearing, construction work on the landfill, and heavy equipment trafficking across sites can generate dust. Dust consists of tiny particles (particulate matter) that can cause respiratory issues if inhaled. Contaminated dust can cause illness to nearby third parties. Off-site migration can lead to third-party bodily injury and property damage claims.

System Failures and Leaks

During construction work on an existing landfill, such as capping, slope management, landfill maintenance, etc., landfill liners and leachate collection systems can be damaged. Damage to these systems can result in the release of contaminants from landfill waste into underlying soils and groundwater. Also, methane collection piping systems can be damaged, releasing methane into the environment.

Engineering Errors

During landfill construction, construction errors can occur, such as landfill liners breaching, leachate collection systems not functioning properly, piping systems having breaks, etc. These errors can lead to the release of contaminants from the landfill waste to the underlying soil and groundwater.

Waste Management

Occasionally, a landfill contractor may be asked to excavate contaminated soils or landfilled wastes, and these must be properly characterized. Wastes may also be generated from the construction work, including waste oils and spent maintenance fluids from equipment. If hazardous wastes are mistakenly mixed with non-hazardous wastes or improper disposal of contaminated soils or wastes from a jobsite occurs, it can lead to cleanup costs and environmental tort liability for the contractor.

Cargo Securement

Transporting waste materials from a landfill construction site by the contractor, or third-party carrier, to disposal sites or recycling centers can lead to environmental liability while on the road and during loading and unloading operations. Spills or leaks resulting from accidents or improper cargo securement can lead to third-party and cleanup liability.

Equipment Fuel and Chemical Spills

Heavy equipment used in landfill construction likely uses diesel fuel and requires petroleum-based hydraulic fluids and lubricants. Aboveground storage tanks, drums, or other containers may store these chemicals at the jobsite or construction yard. Spills during refueling or maintenance can occur, as well as leaks during use, which can contaminate soils or groundwater or migrate to surface waters or off-site. Diesel exhaust also contains numerous carcinogens and criteria air pollutants.

Subcontractors

Landfill construction contractors may hire subcontractors for whom they are responsible, and subcontractors’ actions can become the prime contractor’s liability. Since pollution laws are joint and several, environmental firms can be held liable for pollution caused by a subcontractor.

Field Change Risks

Landfill contractors may make modifications to design specifications while at the jobsite. Malfunctions arising from these changes create a direct professional liability for the contractor.

Errors and Omissions

Contractors may assist with a landfill design or provide professional opinions on design aspects, such as component material, testing methods, etc. Errors and omissions can delay time, overrun budgets, and cause rework. They can also fail and release contaminants from the landfill. All of these create professional liability exposures for the contractor.

A Combined Pollution & Professional Liability Policy Can Provide Coverage For

Contracting operations performed at a jobsite

Contracting operations completed “by or on behalf of” the insured

Third-party claims for bodily injury and property damage

Third-party claims for cleanup

Landfill contractors may be able to combine Commercial General Liability, Contractors Pollution Liability, and Professional Liability

Defense of third-party claims

First-party emergency response costs

Mold, legionella, bacteria, fungi, lead, asbestos, and more

Sudden and accidental coverage for owned/leased locations

Crisis/publicity management

Non-owned disposal site liability

First and third-party transportation pollution liability

Loading and unloading

Natural Resource Damage

Silt and sedimentation

Mitigation/rectification

Excess/contingent design

Claims Scenarios & Examples

During cap construction activities at a hazardous waste landfill site, a contractor inadvertently crushed several drums that were improperly labeled as empty. The hazardous contents were released, causing localized soil contamination. The contractor failed to notify the EPA of the release, which resulted in civil actions against the contractor.
A contractor was hired to install a landfill leachate and gas collection system, including a four-mile-long pipeline to transmit leachate to a city sewer interceptor. Complete fusion of the pipe joints in the transmission pipe was not achieved during construction, and it was later discovered that extensive leakage of leachate had occurred from the piping. The contractor was liable for over $2.5 million in cleanup costs.
Two tension failures occurred while constructing the geomembrane landfill liner’s protection and leachate drainage layers. The failures occurred largely because the landfill contractor altered the construction sequence without considering the consequences. The contractor was liable for repairs and cleanup when the failure was detected.
A landfill contractor was hired to install a methane gas collection and monitoring system at a landfill. They subcontracted a gas detection company to install gas detectors in the scale house. A buildup of methane gas occurred in the scale house that caused an explosion when a worker lit a lighter. Third parties at the scale house were injured in the explosion. Both the gas detection company and landfill contractor were sued for third-party bodily injury.
A metallurgical plant landfill contained a chemical waste by-product of an aluminum production process. A slope failure caused a breach, releasing the toxic waste to adjacent properties and a river. The spill killed 10 people, injured 50, and impacted biological life on land and in the river. The cause of the failure was unclear; however, the contractor who constructed the landfill, the designer, and the owner of the landfill were jointly sued for cleanup, third-party, and natural resource damage claims.
A residential community near a landfill sued the landfill owner and contractor for third-party bodily injury related to releasing contaminated dust from the heavy equipment used in clearing the landfill site and constructing the landfill itself.

Final Consideration

As a contractor you can be faced with the cost to defend yourself against allegations or legal action from pollution or professional related events, regardless if you are at fault or not. Having the proper insurance coverage in place will help fund the expenses incurred to investigate or defend against a claim or suit and provide you with claims handling expertise.

This environmental risk overview offers a general understanding of potential risks and may not reflect all risks associated with your business. Environmental Risk Professionals has compiled this overview for informational purposes only. This overview does not constitute legal opinion or advice, nor does it establish a consultant-client relationship. This overview is not intended to guide project parties in interpreting specific contracts or resolving disputes; such decisions may require consultation with counsel and depend on various factors. © 2025 Environmental Risk Professionals, LLC

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