Remedial Investigation and Feasibility Study

Groundwater Monitoring/Reporting at Multiple MGP Sites, Electric Utility - Wisconsin

Saga staff was responsible for groundwater sampling, analysis and reporting at multiple Manufactured Gas Plant (MGP) sites throughout the state of Wisconsin. The sites were located throughout Wisconsin, in varied hydrogeological settings. Many of the sites were located adjacent to waterways and complex groundwater flow patterns were present. The goal of site investigation at each site was to develop a conceptual site model for contaminant origin, fate, and transport. Site investigation included historical records search of available site plans and documents, site reconnaissance of remaining structures, and field subsurface investigation of buried structures and source areas. Groundwater monitoring well networks were planned and installed based on the unique characteristics of each site (hydrogeology, potential receptors, source areas). Groundwater sampling plans were developed for each site following site characterization of contaminants of concern (COCs), and sampling parameters and schedules were re-evaluated on a continual basis based on sampling results. When appropriate, Saga staff negotiated with the Wisconsin Department of Natural Resources on their client's behalf to make changes to a site's groundwater monitoring program (sampling parameters, locations, frequency, etc.), to maximize the efficiency of the program and ensure that the most representative data was being collected and evaluated. Saga staff also designed and conducted remedial investigations and documented site remediation at several sites.

Groundwater Monitoring/Reporting at Multiple MGP Sites, Electric Utility - Wisconsin

Saga staff was retained by a law firm, on behalf of several insurance companies, to complete characterization of impacted soil and groundwater and evaluate potential remedial measures following discovery of chlorinated solvent contamination of soil and groundwater within a local port facilities redevelopment area. Services involved investigations to further characterize the nature and extent of contamination, evaluate properties influencing groundwater flow and transport overlying a sandy gravel drinking water aquifer, assess and evaluate interim and long-term remedies, and recommend remedy selection. Saga staff completed a Feasibility Study (FS) in support of an interim remedy that involved source area treatment and minimization of off-site groundwater and surface water transport to address immediate Oregon Department of Environmental Quality (Oregon DEQ) concerns, and facilitated re-development of the property in a timely manner. Oregon DEQ approved the FS, and Saga staff prepared a remedial design/remedial action (RD/RA) work plan. In addition, Saga developed implementation costs that were utilized to support settlement negotiations between the current and past property owners and insurers.

Feasibility Study, NPL Landfill - U.S

Saga staff evaluated feasible alternatives for control of gas migrating from a 145-acre, 350-feet-deep, National Priority List landfill in the western U.S. This evaluation included analyzing the effectiveness of an existing commercial gas collection system, an active gas migration control system, and gas monitoring network.