Process for Source Zone Remediation

Parsons has developed and acquired a patent (US Patent No. 8,679,340) for the bioremediation of light nonaqueous-phase liquid (LNAPL) using enhanced natural anaerobic biodegradation and is pursuing sites to implement this patent-pending process. LNAPLs are a continued source of contamination in subsurface soil and groundwater at many petroleum sites, and recovery or treatment via traditional remediation technologies is expensive and inefficient. At many sites, residual LNAPL remains in the soil after mobile LNAPL is recovered by pumping. This residual LNAPL often serves as a continuing source of dissolved hydrocarbon plumes, including benzene, toluene, ethylbenzene, and xylenes (BTEX). Regulatory agencies within many states do not allow residual LNAPL to remain in place unless it is treated to the extent practicable. Existing technologies are costly and/or ineffective for treating residual LNAPL, especially over large areas. Parsons has developed an environmental remediation process that promotes the sustainable and natural biodegradation of LNAPL through the addition of nutritional supplements and other means that promote the growth of naturally occurring anaerobic microorganisms that digest LNAPL