Subsurface Investigation

Commercial Printing Facility - Wisconsin

Saga personnel completed site investigations, remedial design and implementation, and post remedial sampling at a commercial printing facility in southeastern Wisconsin. The site was contaminated with Volatile Organic Compounds (VOCs), primarily 1,1,1-Trichloroethane and 1,1-Dichloroethane, and low level polycyclic aromatic hydrocarbons (PAHs) concentrations. The site investigation involved the installation of shallow monitoring wells both inside and outside of the facility building, and deeper piezometers in fractured carbonate bedrock. Remedial actions comprised of two rounds of injection of a proprietary hydrogen-releasing agent to enhance natural attenuation of the Contaminants of Concern (COC) beneath the interior floor of the facility building. Post remedial sampling results indicated that concentrations of COCs in groundwater had decreased to levels below applicable groundwater enforcement standards.

Subsurface Investigation, Wood-Treating Facility - Wisconsin

Saga staff was a senior technical advisor for a project in northern Wisconsin involving containment and monitoring of soil and groundwater affected by past wood-treating operations. Remedial actions included capping of an area of pentachlorophenol-affected soil, groundwater monitoring in compliance with an Administrative Order, and evaluation of other remedial alternatives to actively remediate affected soil and groundwater if action levels were exceeded as outlined in the Administrative Order.

Areawide Chlorinated Solvent Characterization - Oregon

Saga staff have been retained by a law firm, on behalf of several insurance carriers, to complete characterization of impacted groundwater from a former dry cleaner as required by the Oregon Department of Environmental Quality. While extensive source area soil and groundwater treatment has been conducted, the extent of the off-site groundwater impacts have not been defined that may threaten beneficial use wells including a municipal water supply. Investigations using multi-channel wells are currently in progress that are expected to result in a more detailed understanding of site impacts. Future activities may include supplemental subsurface investigations, hydraulic assessment, beneficial use evaluation, risk assessment, and feasibility study.