Soil and Groundwater Remediation

Remediation of soil and groundwater is a costly and often complex undertaking. When remediation is necessary, selecting appropriate technology and system design can be the difference between achieving a timely, cost-effective solution and one that is prolonged and expensive. With experience at hundreds of site remediations, Daniel B. Stephens & Associates, Inc. (DBS&A) has established a reputation for providing technically sound, and cost-conscious remediation system design, installation, and operation and maintenance.

DBS&A's remediation teams draw on corporate and individual expertise in the investigation and remediation of a wide range of contaminants. These teams consider regulatory and site-specific conditions and apply the right solution for each situation. Whether routine or complex, our solutions to subsurface contamination problems have consistently met or exceeded client goals and regulatory requirements.

Soil & Groundwater Remediation Services

Soil and groundwater investigations

• Soil and groundwater characterization
• Contamination assessments

Remedial action feasibility tests

• Soil vapor extraction pilot testing
• Air sparging pilot testing
• Aquifer hydraulic properties testing
• Geotechnical properties testing

Regulatory compliance

• Permitting, including air quality, discharge plans, and appropriation of groundwater
• Regulatory agency negotiations
• Fulfillment of reporting requirements

Remediation technologies

• Soil vapor extraction
• Groundwater pump-and-treat with discharge and reinjection
• Air sparging
• Constructed wetlands
• Bioventing
• In situ bioremediation
• Excavation and land farming
• Stabilization and encapsulation
• Natural attenuation

Soil vapor and groundwater treatment technologies

• Catalytic oxidation
• Thermal oxidation
• Air stripping
• Multistage diffusers
• Slurry bioreactors
• Granular activated carbon

Risk-based corrective action (RBCA)

DBS&A designed and installed thermal oxidizer system