- Case Study: Remediation of a Complicated Petroleum Hydrocarbon Site Using a Multi-Technology Approach
This talk will showcase a site where multiple remediation technologies were implemented. A staged approach was planned due to the presence of free-phase petroleum product and the existence of petroleum hydrocarbon contamination in both soil and bedrock aquifers. Multiple petroleum hydrocarbon sources were present across the site along with an on-site spill that occurred part way through the clean-up efforts. Access to all contaminated areas was not possible due to interior sensitive activities and exterior busy trucking routes. During site remediation, new petroleum hydrocarbon sources were discovered and remedial plans/approaches were adjusted to mitigate/include these new sources with minimal impact to the overall budget of the project.
- Benefits of Combining In Situ Chemical Oxidation with In Situ Stabilization: Synergies and Solutions for Complex Sites
In situ stabilization and solidification (ISS) and in situ chemical oxidation (ISCO) are well established technologies that have each been applied for decades. In recent years, several sites have combined these two technologies in a single application. There are several benefits depending upon the ratio at which the reagents are blended. These include potential overall reagent mass reduction, lower leachate concentrations, and better control over post application soil geotechnical characteristics. The reagent blend can be optimized depending on the balance of remedial goals of mass destruction from ISCO and contaminant stabilization from ISS.
- Potential for Vapor Intrusion - Assessment method review
As part of this conference, WSP will present case studies of characterization and risk management associated with the potential for vapor intrusion. The first case will present a comprehensive study involving the development of more than fifty implants on an industrial site, the realization of a pilot test for the design of a sub slab depressurization system, and the development of said system. The second case will deal with the evaluation of the potential for vapor intrusion on a future residential site located near an enclave of soils and groundwater affected by toluene. The presentation will discuss technical challenges in conducting fieldwork, interpreting the data collected, and considerations for implementing or not implementing mitigation measures.