MGP Site Remediation Requires Soil Treatment and Sensitive Work Area Design
Location
Northeast
Industry
Utilities
Challenge
Remediate a manufactured gas plant site that produced coal tar waste
We performed remediation activities under a temporary containment building equipped with a vapor management system. These activities included soil excavation, treatment, restoration and civil construction services.
For this complicated site, ENTACT combined its construction background and ground improvement expertise to create a multi-part solution.
ENTACT Solution
Remediation included soil excavation, treatment, restoration and many civil construction components as well. Remediation activities were performed under a temporary containment building equipped with a vapor management system.
The project’s complexities went beyond soil treatment needs. There were a number of concrete footings, foundations and subsurface utilities to be removed, as well as overhead power lines that required clearance and line shielding.
- Excavated, transported and disposed of MGP-impacted soils
- In-situ solidification and stabilization using cement-bentonite-slag grout up to 30 feet deep
- Constructed temporary containment structure with vapor management system to manage and treat spoils
- Installed a soilcrete retaining wall
- Abandoned, relocated and/or protected utilities
The Results
- Safely and successfully managed project implementation as well as park, office building and traffic priorities
- Reduced cost and schedule through treatment area and sequencing improvements
- Performed in-situ solidification and stabilization of 169,000 cubic yards of impacted material
