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PROJECT 1: Excavation Industrial Hygiene and Waste Management Services for Natural Gas Pipeline Construction

Applying a practical Soils Characterization and Management Plan, Landmark rapidly completed an excavation of a natural gas pipeline trench within the footprint of an unregulated landfill.

Landmark was retained by a major electric and natural gas utility to complete the excavation and environmental oversight for a portion of a 24-inch natural gas pipeline being installed within the footprint of an unregulated former landfill.  Since the excavation of the trench and associated bore pits had the potential to involve contact with landfill wastes potentially containing regulated materials such as asbestos, Landmark was specifically retained to perform the excavation and environmental oversight within the landfill footprint.

Landmark developed a Soils Characterization and Management Plan, which presented the precautionary measures and contingency procedures for trenching associated with the natural gas pipeline. Landmark rapidly completed the excavation of the pipeline trench and associated bore pits within the footprint. Mixed soil and landfill waste were excavated, segregated and landfill debris transported to a local solid waste landfill for disposal. Following excavation, no visible asbestos-containing material or hazardous materials were present within the excavation, and pipeline installation proceeded.

PROJECT 2: Remediation of Former Crude Oil Pipeline Corridor

 Development and implementation of effective work plans and risk assessments for the successful removal of asbestos-containing material pipe wrap debris.


Landmark successfully managed and performed a long-term asbestos program for a crude oil pipeline corridor operated by a major oil and gas client. This 15-year project has included management and implementation of asbestos compliance, industrial hygiene, safety, and Operations and Maintenance Programs. The asbestos consisted of pipe wrap used to insulate and protect the pipe from corrosion in the subsurface environment and was released during historical salvage operations by an independent contractor.   

Operations have been safely completed without incident during the 500,000 hours worked along the 170-mile oil transmission line easement with extensive associated infrastructure. This complex and challenging project was successfully and proactively coordinated with multiple divisions within two state health departments and numerous other stakeholders. Technical services included: design and implementation of innovative approaches to cleanup and oversight, conscientious coordination with hundreds of private and public property owners, and effective development and implementation of human health risk assessments.

A key aspect of the project included development and implementation of an Activity-Based Sampling Asbestos Risk Assessment to identify potential health and environmental impacts during typical land use activities along the pipeline corridor. The risk assessment focused on evaluation and quantification of the incremental lifetime risk to receptor populations based on asbestos contaminant concentrations and identified exposure pathways. Potential exposure pathways were evaluated using U.S. Environmental Protection Agency and other guidelines, yet many of the technical aspects related to sampling and analysis that were developed for this project are unique and precedent-setting.

PROJECT 3: Environmental Remediation of an Historical Munitions Arsenal

Industrial Hygiene Assessments conducted in close concert with Explosives Safety Surveys in 82 Buildings at a 200-year-old Arsenal.

Picatinny Arsenal is the oldest continually operating arsenal in the United States and specializes in advanced conventional weapon systems and advanced ammunition life cycle management, research, development, and acquisition. As a team member for the Facilities Reduction Program, Landmark conducted asbestos, lead, polychlorinated biphenyls (PCB), and Other Regulated Material (ORM) surveys at 82 structures operated since the Korean War. The ORM survey included assessments and inventory of hundreds of locations with stored chemicals and chemicals/oils in process systems, lighting wastes, and refrigerants.

Because this project included numerous areas with hidden materials and unforeseen conditions, Landmark’s robust project controls and quality assurance focused on safety and addressed specific investigation-related data-gap concerns that were proactively identified by our experienced personnel. These project controls were adopted by other team members.


A key success of this project was our ability to anticipate hidden materials and address them through destructive sampling and other means. Following completion of the site characterization surveys, Landmark developed facility abatement and hazardous materials removal cost estimates and work plans for these large and complex abatement projects. Landmark performed oversight and industrial hygiene monitoring and successfully confirmed compliance during decommissioning and demolition of these structures, including several explosively contaminated buildings.

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