Remediation Solution
Remediation Approach
Technology
Media Treated
Industry
Contaminant Type
Contaminant of Concern
Location
A historic industrial site near Lake Superior contained heavy coal tar contamination in a tight lithology of well-graded sands, silts, and gravels. An existing pump-and-treat system had achieved diminishing NAPL recovery over time, and the geological heterogeneity presented significant barriers to treatment chemistry distribution.
Sonic drilling was employed to penetrate the tight lithology, enabling in-situ chemical oxidation targeting heavy hydrocarbons for soil desorption, breakdown, and mobility. BAM and calcium peroxide were injected near the plume perimeter to address dissolved-phase PAH impacts. A vacuum truck provided simultaneous extraction support.
Following treatment, a significant surge in free product removal was observed, substantially exceeding the extraction rates achieved by the existing pump-and-treat system prior to intervention. The sonic drilling delivery method successfully penetrated the tight well-graded sand, silt, and gravel lithology that had limited conventional treatment approaches, enabling effective distribution of in-situ chemical oxidation chemistry for heavy hydrocarbon desorption and breakdown, and BAM/calcium peroxide for dissolved-phase PAH treatment at the historic industrial site near Lake Superior. The client subsequently requested additional treatment phases based on the performance observed during this initial round.
Superfund ISTR Under Strict Air Emission Limits
Bioremediation for PFAS
High-Profile ISTR of Historic Chemical Disposal Impacts
