Weber, Hayes & Associates provides a broad spectrum of environmental remediation options, with the goal of using appropriate, cost-effective strategies and technology to achieve cleanup and site closure. Each remedial action design process is site-specific and depends on a number of parameters including contaminant properties, plume characteristics, local geology and groundwater flow, potential nearby receptors, and cleanup requirements as set by the governing regulatory agency.

Corrective Action Plans & Feasibility Studies

After a subsurface investigation and site characterization have determined that remedial action at a site is necessary, a Corrective Action Plan (CAP) will further analyze the site and plume characteristics to determine which remediation method(s) will be most effective. In some cases, a feasibility study will take place to gather certain information on the effectiveness of a specific remediation strategy before the final design is completed and implemented.

Bioremediation Assessments & Natural Attenuation Studies

Certain sites may be able to bypass complex remediation systems if they meet bioremediation or natural attenuation requirements, as determined by the regulatory agency. Biological and chemical processes may naturally breakdown contaminants in groundwater, however the speed and effectiveness with which this occurs can vary greatly depending on site and plume conditions.

Remediation Systems

Remediation systems use a variety of physical and chemical processes to remove or treat contaminants. Remedial strategies include:


  • Soil Vapor Extraction – Air within the pore space of the soil is extracted and sent through a treatment system which removes volatile contaminants.
  • Air Sparging – Air is delivered to specific areas in the subsurface with the goal of increasing oxygen levels and accelerating natural attenuation due to aerobic microbes.
  • ORC (Oxygen Releasing Compound) Injection – Similar to the strategy behind air sparging, ORC injection uses an oxygen release compound to increase oxygen levels in the subsurface.