It is the goal of each environmental remediation project to achieve closure with the involved regulatory agencies. Walden works closely with the applicable agency to define cost effective remedial goals - "when to stop". Because of the uncertainties involved with subsurface remediation, final closure is often an elusive target. While many of our projects are being managed to control costs as the move toward closure, Walden has often found that aggressive in-situ short duration approaches often best control long term costs. 

Remedial design services are provided relating to the full definition of contamination migration in soil and groundwater, used where possible of in-situ cost-effective remedial technology, engineering, design, construction, and operational and maintenance services. Walden has designed bioremediation, pump and treat, product recovery systems (passive and active) and soil vapor extraction combined with or without sparging treatment systems. This experience allows Walden to select the most appropriate and cost-effective remedial technology for a given application.