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Contaminant & Hydrogeologic Spectrum

EcoVac Services’ powerful remediation tools have enabled Ecovac Services to provide total solutions for the full spectrum of VOCs, lithologies, and hydrogeologic conditions.  EcoVac's processes have been utilized to remove gasoline, diesel fuel, heavy oils, jet fuel, aviation gas, kerosene, Stoddard solvent, PCE, TCE, xylene, toluene, acetone, pine tar, and their daughter products from the subsurface at various sites.  These sites have included a wide array of hydrogeologic conditions, including well-graded sand, silt, clay, saprolite, glacial till, and fractured bedrock, with groundwater depths ranging from 2 feet to 135 feet below ground surface.  NAPL plume sizes have ranged from limited areas to those that have included several properties encompassing an area of more than>2 acres (550 feet by 250 feet).

 EcoVac uses its EFR® technology for mass removal of VOCs.  As VOC removal rates and contaminant levels decrease, EcoVac can quickly progress to the next phase of remediation.  SURFAC® or SOLV-IT® can be implemented for sites containing dissolved organic compounds.  EcoVac works closely with clients and state agencies to evaluate site conditions and field results to develop an approach that meets cleanup objectives for each and every site.  EcoVac has utilized each of its technologies individually and/or collectively for proven results. 

EcoVac Services newest tool for effective remediation is its treatability laboratory.  EcoVac Services’ in-house laboratory and experienced personnel will select and optimize the surfactant, cosolvent, and/or oxidant suitable for each and every site.  EcoVac’s formulated surfactants (EFS™) and cosolvent/biosolvent blends are site specific as opposed to off-the-shelf brands.  The properties of a surfactant should be adjusted based on NAPL type, groundwater chemistry, NAPL residual saturation level and soil type.  Thus, the surfactant formulation is site-specific, and there is no surfactant that works for every site.  ISCO-EFR® treatability studies include the determination of site-specific total oxidant demand (TOD), contaminant efficacy, and oxidant longevity assessments.  This type of study determines the minimal amount of oxidant to optimize the performance of the oxidant and obtain each site’s cleanup objective. 

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