Environmental Remediation

The process of bringing an environmentally damaged property back into productive use is LGS’ specialty. From the initial environmental assessments through value engineering and competitive remediation technology calculations, to remedial demolition and environmental systems installation, LGS provides our clients with the most professional, regulatory-compliant and defensible support available while keeping a close eye on the economics of returning the property to productive use.

We offer completely integrated solutions to challenging environmental problems, assistin clients with finding proper and cost efficient solutions to environmentally blighted properties.


  • Bioremediation
  • Soil Vapor Extraction
  • Groundwater Sparging
  • Soil and Water Treatability
  • Groundwater Control and Containment
  • Combined Soil Vapor and Groundwater Extraction


  • Lead- and Tin-Based Paint Abatement
  • Asbestos Assessments, Abatements and Clearance
  • Petroleum, Oils and Lubricants Contamination Evaluations, Studies and Abatements
  • Building and Pad Demolitions
  • Integrated Systems Extractions
  • Surgical Structural Demolitions


  • Groundwater Pump and Treat Systems
  • Bioremediation System and Process Installations
  • Phytoremediation Systems Applications
  • Soil Vapor Extraction and Treatment Systems
  • Groundwater and Aquifer Studies
  • Geosynthetic Liners and Barriers
  • Stabilization and Cover Systems
  • Leachate and Stormwater Collection and Treatment • Construction Quality Assurance
  • Operation and Maintenance Manuals
  • System Start-up and Balancing
  • Acceptance Testing
  • Certification
  • Full-time or Part-time System Operators
  • Routine and Special Maintenance
  • System Performance Monitoring and Reporting

Environmental Evaluation

LGS provides a comprehensive capability to evaluate environmental condition of properties, located nearly anywhere in the world. Evaluation performance includes work on unique properties such as ships, floating platforms and rigs, riparian lands, extremely remote mountainous and arid locations, as well as challenging urban locales.

  • Inventory of Hazardous Materials (IHM)
  • Evaluations include All Appropriate Inquiry (AAI)
  • Phase I, Phase II and Remedial Planning and Actions
  • Maritime Environmental Review (Floating and Fixed Platforms as well as ships)
  • Forensic Environmental Evaluations
  • Risk Analysis
  • Critical Path and Uptake Analysis
  • Fate and Transport
  • Hydro-geologic Groundwater Mapping
  • Geologic Disbursement Mapping
  • Plume Delineations

The principals of LGS and its environmental evaluation staff have successfully evaluated hundreds of ship, thousands of properties, projects and situations worldwide to provide clients with the best possible information concerning environmental condition, the presence or absence of hazardous, controlled or biological contaminants, and the formulation of comprehensive remedial or abatement plans, techniques and engineering solutions to abate or otherwise overcome these challenges. Working through Voluntary Clean-up Programs (VCP) in more than 30 states, LGS senior environmental evaluators have provided clients who own or wish to purchase environmentally challenging properties, with the most comprehensive approach and exhaustive methodologies to put challenging properties back into production.

The City of Frederick, MD, relied completely on LGS personnel to provide comprehensive environmental evaluation, fate and transport of hazardous materials, risk analysis and remedial planning for six properties to be purchase for the extension of the new AMTRAK rail line and the expansion ($1.3B) of the East Street Railway link and East Street Extension (Carrol Creek Upgrade) Project, started in 2007 and still underway.

Hazardous Waste and Release Support

The management of Hazardous Materials (HAZMAT) and the control, recapture, remediation and clearance of areas of the environment where hazardous substances could be, or already have been released, is the cornerstone of LGS Environmental Services. Releases or threatened releases of hazardous substances and the management of hazardous wastes are subject to a complex web of EPA as well as state and municipal regulations. LGS engineers and environmental scientists have assisted clients in navigating through and complying with these regulations. Once a release occurs, or detection of a previous release is acquired, LGS exercises what we refer to as “compliance plus” support. Not only adhering to the minimal performance standards, but exceeding those standards, demonstrates to regulators the client’s seriousness in willingly supporting all aspects of required remediation work, yielding better relationships with the regulators and a more economic and “green” result for the client.


Possibly one of the most concerning terms that a client can have, from an environmental perspective, is “Superfund”. It carries with it stigma and perception of insurmountable costs and an impenetrable morass of paperwork. LGS is a leader in the successful resolution of Superfund problems, and has worked on dozens of Superfund sites, providing expert guidance to clients forced to deal with the daunting task of converting a severely distressed property to a useful one. From identification and preliminary assessment through screening investigations, remedial investigations, feasibility studies, remedial design, construction engineering, and long-term operation and maintenance, LGS personnel can, have, and will provide the guidance, experience and expertise to navigate the barriers to restoring


LGS professionals are often called as expert witnesses for plaintiffs and defendants in cost recovery litigation under Superfund. Such litigation typically involves the question of whether responses have been consistent with EPA’s National Contingency Plan or that reasonable actions were taken to prevent, mitigate or control releases or to avoid the possibility of a release. Often, such testimony is provided as part of the response to an enforcement action before an administrative law judge.


  • Technical Assistance in Negotiating Administrative Consent Orders
  • Preparation, Negotiation, and Implementation of Work Plans Demonstrating Regulatory Adherence
  • Risk Assessment for Human Health and Environmental Effects Based  Upon Quantifiable Release and Capture Information
  • Forensic Evaluation of Construction Plans and Specifications
  • Review of Environmental Records and Assistance in the Formulation of Regulatory Compliance Opinions
  • Post activity Quality Assurance Evaluations
  • Long-Term Operation, Maintenance, and Monitoring Effectiveness Reviews
  • Technical Support for Private Cost Recovery