Projects & Programs
Webb State Park Geochemistry Support
Pacific Northwest National Laboratory (PNNL) scientists have participated in site characterization of the Webb Memorial State Park, a 36-acre peninsula in Weymouth, Boston. The site has been characterized to understand the occurrence and fate of contaminant arsenic and lead in the soil and groundwater. Additionally, PNNL geochemists are part of the project team that developed an effective remediation technology to immobilize the contaminants in the subsurface. Work scope includes the following:
- Providing geochemistry support for remediation design and site closure work at the Webb State Park site
- Reviewing existing documents
- Recommending data collection required to understand site geochemistry
- Performing laboratory testing to quantify contaminant release rates from soil
- Developing a site-specific conceptual geochemical model
- Participating in long-term groundwater monitoring of the site.
This work will help ensure that soil remediation at the site will be effective, thereby reducing contamination in the groundwater and minimizing impacts on nearby environmental receptors in Boston Harbor. This work will also demonstrate that the remediation method provides a long term solution to contamination and will not require supplemental treatment in the future. Allowing for onsite soil stabilization eliminates the need to truck contaminated soil through nearby neighborhoods.
Work results have produced a conceptual site geochemical model that explains site conditions and was used in the remediation design. PNNL staff have also participated in several public meetings to explain the remediation plan to local stakeholders of the Webb Memorial State Park.