D’Appolonia is experienced in remedial activities associated with Superfund sites and our environmental personnel are thoroughly familiarity with the RCRA and CERCLA programs. Our personnel have worked on numerous Superfund sites and several RCRA facilities in the U.S. on projects not only related to remedial investigation (RI) and feasibility studies (FS), but also with respect to remedial designs and remedial actions. Our experience in the design and construction phase activities enables us to develop focused investigatory programs with the needs of remedial designers in mind. We have prepared risk assessments consistent with Superfund Risk Assessment Guidance documents, and we have also successfully negotiated changes in risk assessments prepared by the USEPA. We have evaluated numerous containment, treatment and disposal technologies and have implemented many of them succesfully at Superfund and RCRA facility sites.

Portion of Millcreek Superfund Site prior to remediation and restoration.

Golf instruction at restored Millcreek
Superfund Site.

Descriptions of projects related to Superfund site restoration and redevelopment are provided in the following:


Millcreek Superfund Site Restoration and Redevelopment

D’Appolonia was retained by the PRP Group for the Millcreek site to review the remedial design. The original design was found to have some deficiencies, and D'Appolonia prepared a revised design that addressed some technical problems and saved an estimated $1.3 million in construction costs. We then prepared a conceptual design for a 9-hole golf course and golf teaching center, which was subsequently constructed on the site. The implemented reuse option provided a recreational benefit to the community while maintaining the integrity of the landfill cap system.

Slope Stability Evaluation at New England Superfund Site

During a remedial investigation of a Superfund Site that was a former municipal disposal area, two large scarps were observed behind the crest of steep debris slopes on the flanks of the disposal area. Because the disposal area was on a hillside above a river, the steep slopes and scarps caused concern relative to the possibility of continued slope movements and eventual contamination of the river. D’Appolonia was retained to develop a geotechnical exploration program, to evaluate the stability of the debris mass, and to develop remedial design concepts to allow site closure.