Opal Group Inc.
Sullivan's Ledge Superfund Site
Sullivan’s Ledge Project Management Committee
New Bedford, MA
The Sullivan’s Ledge Superfund Site is located in New Bedford, Massachusetts, in a highly commercialized and recreational area. The site was a former quarry that was used to dispose both municipal sanitary and industrial wastes. The closure of the site required extensive coordination with U.S. Environmental Protection Agency Region I, Massachusetts Department of Environmental Protection, an active citizens group, Potentially Responsible Parties, the City of New Bedford, and an adjacent municipal golf course. The closure of Sullivan’s Ledge Superfund Site Operable Unit was performed in three phases and project managed by Opal, Inc. personnel.
The remediation included the following source removal and ground water treatment elements:
- Preparation of remedial action work plans for each phase of work,
- Excavation of approximately 5,000 cubic yards of soils impacted by PCBs VOCs and metals from an adjacent stream and tributary, stabilization and onsite consolidation of excavated sediments,
- Lining of a stream channel with 800 lineal feet of 72-inch prestressed concrete pipe culvert in the main channel and HDPE in the southern tributary,
- Construction of a 60 gpm groundwater extraction and UV/Oxidation treatment system,
- Installation of a 400-foot of soil/bentonite slurry wall to a maximum depth of 75 feet,
- Placement of utility and drainage conduits under an adjacent high-use road.
- Excavation of portions of contaminated sludges and sediments from an adjacent stream and golf course, stabilization of the excavated soils, and onsite consolidation of the stabilized materials.
- Construction of a 13-acre disposal area cap and restoration of wetland areas.
Type of Work: Work Plans, Source Removal, PCB's, VOC's, metals, Lining, Ground Water Extraction, Slurry Wall,
Size: 13 acres, 400 ft slurry wall
Services: Engineering, Civil Construction, Water Treatment
Related Projects: Prewitt, Yorktown, GE Superfund
