Phase III: Remedial Response Actions

The general objective of remedial response actions is to minimize and eliminate contaminant migration and clean up a property in a cost-effective manner and in accordance with regulatory agency criteria, with the goal of attaining file closure by the agency. The No Further Action designation is typically attained after demonstrating remaining soil and/or groundwater impacts to be of acceptable risk, verified by sample results that are less than agency cleanup thresholds or risk-based values. Low threat closures may also be the goal

TRAK, as a full service environmental engineering and contracting firm, conducts all elements of remediation systems design, construction, operation and maintenance, and site closure.

Remediation Feasibility and Design: A remediation strategy is developed to achieve reasonable cleanup objectives, often requiring negotiation with the regulatory agency to reach sensible consensus. The remediation plan is built upon site-specific data, including previous assessment results, and pilot testing such as soil vapor extraction, biovent, constant discharge aquifer tests, and air sparge, bio remediation chemical oxidation, or reduction. These data are incorporated with modeling, feasibility analysis, and engineering design, typically resulting in authorization of a Corrective Action Plan by the local oversight agency.    

Implementation, Construction and Operation: Remediation technologies may be as straightforward as excavation of impacted soils with follow-up verification sampling, or may involve in-situ techniques.  Soil excavation generally includes transport of impacted soils to a licensed treatment or disposal facility, and restoration of site conditions. TRAK has utilized in-situ techniques such as soil vapor extraction of fuels (service stations, bulk terminals, gas plants, HiVac, Bio Remediation, oxidation, motor pools) and solvents (dry cleaners, metal-platers, manufacturers), augmentation by air sparge (fuel and solvent sites) and dual-phase extraction and bioventing. In-situ remediation has been enhanced by innovative methods for deep source removal, including crane auger excavation with solidification of subsurface media.

Construction of remediation systems is managed and implemented by TRAK’s certified personnel, and conducted in accordance with permit requirements (construction, emission and discharge), and regulatory agency criteria. System operation and maintenance is carried through project completion, in compliance with applicable monitoring and reporting requirements.

Verification and Closure: As indicated by system or site monitoring results, TRAK conducts appropriate verification sampling to demonstrate attainment of target cleanup objectives. Upon agency concurrence of No Further Action, or low threat closure designation, equipment is removed, the site restored, and the project completed.