• Site At-a-Glance

Combustion Inc. Superfund Site

PNL's Role

Project Navigator, Ltd. (PNL) was hired by the PRP Group in 2015 as the Project Manager to perform coordination, administration and management services. PNL was tasked with performing an audit on all subcontractor SOWs and budgets to right size the level of effort for the project. PNL manages all aspects of the OM&M, which includes a large phytoremediation component.

Project Description and History

The site is the location of a former waste oil recycling facility which operated from the late 1960s until the early 1980s and consisted of a small processing plant (Process Area), a Pond Area, and a connecting pipeline. Two basic operational processes existed at the site: oil reclamation and wastewater treatment. There are approximately 1,000 residents that live within a 1-mile radius of the site. The immediate residential properties are located along the northern, eastern and western boundaries and consist of 36 homes. The groundwater contaminants include semi volatile aromatic amines and volatile chlorinated organics including 1,2-dichloroethane.

The Record of Decision was signed in May 2004 and included phytoremediation, groundwater monitoring and institutional controls. Phytoremediation, as an enhancement to natural attenuation, provides additional controls to prevent further lateral migration of contaminants in the groundwater. The phytoremediation component includes planting and maintenance of trees in a manner designed to inhibit movement of groundwater contaminants toward the down gradient perimeter and to degrade contaminants within the plume. Once the trees have been properly established, phytoremediation will be primarily a passive remediation. The LDEQ and EPA accepted the Group's Interim Remedial Action Report in 2007, which documents the end of RA and the beginning of long-term Operations, Maintenance, and Monitoring (OM&M).

Hot-spot treatment was selected as the contingency remedy to provide additional treatment in the more highly contaminated areas of the groundwater plume should the selected remedy fail to meet the specified criteria when evaluated during the first Five Year review.

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