Anaerobic Degradation of Petroleum Hydrocarbon Contaminants (PHCs) via Biostimulation Supported Biofilm Development
Background: Two underground storage tanks (UST), one containing heating oil, one gasoline, with incidental product releases, were removed in 1980s. Excavated soils and surface concrete returned into tank grave. Undocumented fill used to complete backfill operations. 2018 treatability study performed to identify sustainable, low-cost, low-impact remedial strategy to address Site contaminants in all media – soil, soil vapor, and groundwater. The biostimulant TPHENHANCED (TerraStryke Products LLC) was chosen for evaluation based on cost-effectiveness, efficiency, and ability to sequester greenhouse gasses, lowering carbon footprint concurrent with contaminant destruction.
Hydrogeology: Geology brown sandy-silt soils, varying gravel 1-5 feet (5ft) below ground surface (bgs) underlain by medium-dense to very-dense sandy-silts, trace gravel from 5-50ft bgs. Unit supports discontinuous perched groundwater 14ft bgs within native and unconsolidated soils/backfill.
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