Dnapl Source Articles & Analysis
22 articles found
The subject site is a former dry cleaning facility in Northern Europe, where a large tetrachloroethylene (PCE) plume was impacting groundwater on and off-site. In 2017, CAT 100 and BOS 100® were applied as part of a large-scale remediation program. Currently, a 95% average reduction in PCE plume concentrations has been observed in the monitoring wells located in the areas targeted by the ...
Aestus performed our GeoTrax Surveys to asses the performance of a DNAPL recovery system installed within a waste pit at a hazardous waste landfill. ...
TerraStryke Products LLC develop and distribute biostimulation additives proven to cost-effectively maximize the performance of your bioremediation project; expediting contaminant destruction, eliminating rebound, to realize long-term compliance with minimal impact and less cost. ERDenhanced is our patented biostimulation additive that provides a carbon-nutrient based formulation that stimulates ...
TerraStryke Products LLC develop and distribute biostimulation additives proven to cost-effectively maximize the performance of your bioremediation project; expediting contaminant destruction, eliminating rebound, to realize long-term compliance with minimal impact and less cost. Our patented biostimulation additives adjust site biogeochemistry (subsurface ecosystem) to sustainably support the ...
TerraStryke Products LLC develop and distribute biostimulation additives proven to cost-effectively maximize the performance of your bioremediation project; expediting contaminant destruction, eliminating rebound, realizing long-term compliance with minimal impact and less cost. Our patented biostimulation additives enhance site biogeochemistry (subsurface ecosystem) to sustainably support the ...
ERDENHANCED™ (2,600 pounds) deployed in 2001 via direct-push technology (26 nodes) into two, silty-clay, laterally continuous, hydraulically conductive source zones; baseline concentration of Trichloroethylene (TCE) ≈97,400 micrograms per liter (μg/L), roughly 9% solubility of TCE, indicating significant residual source mass in saturated soils as ...
TerraStryke Products LLC develop and distribute biostimulation additives proven to cost-effectively maximize the performance of your bioremediation project; expediting contaminant destruction, eliminating rebound, realizing long-term compliance with minimal impact and less cost. Our patented biostimulation additives enhance site biogeochemistry (subsurface ecosystem) to sustainably support the ...
Introduction: TerraStryke Products LLC (TerraStryke) develop/distribute biostimulation additives proven to cost-effectively enhance the destruction of organic contaminants, safely and completely, with minimal equipment or adverse site impacts. ERDENHANCED™ leverages untapped biogeochemical principles to facilitate the destruction of organic halides such as tetrachloroethene (PCE), ...
TerraStryke Products LLC (TerraStryke) develop-distribute biostimulation additives proven to cost-effectively enhance chlorinated volatile organic compound (cVOC) biotransformation safely and completely. Our patented biostimulation additive ERDENHANCED leverages existing biogeochemical conditions to facilitate chlorinated alkane/alkene destruction. ERDENHANCED is proven to expedite residual mass ...
TerraStryke Remediation Products LLC (TerraStryke) develop and distribute biostimulation additives proven to cost-effectively enhance any bioremediation project, expediting contaminant destruction & site compliance with minimal impact. ERDenhanced enhances site biogeochemical conditions to attain sustainable and complete biotransformation of cVOC contaminants. The following case study ...
ERDenhanced (2,600 pounds) deployed in 2001 via direct-push technology (26 nodes) into two, silty-clay, laterally continuous, hydraulically conductive source zones. Baseline concentrations of trichloroethylene (TCE) ≈97,400 micrograms per liter (µg/L); roughly 9% solubility, indicating significant residual source mass in saturated soils as non-aqueous ...
Abstract Performance and rebound of intensive source depletion technologies were evaluated at 59 chlorinated solvent sites where remediation targeted dense non-aqueous phase liquid (DNAPL) source zones. ...
Environmental Protection Agency expert panel on dense non-aqueous phase liquid (DNAPL) remediation concluded that uncertainty in the costs and benefits of applying source depletion technologies (i.e., active remediation in source zones) is one key factor that discourages widespread use of these technologies at DNAPL sites ...
The subject facility had been in operational since ca. 1971. The DNAPL contamination was comprised of DCE (Dichloroethylene) and TCE (Trichloroethylene) dry-cleaning solvents. ...
There has been less attention, however, on source removal, such as of dense non-aqueous phase liquid (DNAPL) source areas. At sites where achievement of stringent remedial goals is necessary in a short timeframe, aggressive source remediation is required. Among the various methods of “aggressive” (but efficient) ...
Abstract A PCE DNAPL source zone was treated using thermal conduction heating combined with multi-phase extraction. Thick peat layers, even when contaminated with PCE DNAPL, were remediated to average soil PCE concentrations of 0.17 mg/kg (99.6% reduction compared to starting levels). ...
(TRS) designed and operated Electrical Resistance Heating (ERH) systemsto treat three LNAPL/DNAPL source areas at the Ft. Lewis, East Gate Disposal Yard (EGDY) NPL site. ...
The remedial action objective was to remove DNAPL to protect the drinking water source beneath the contaminated area, and reduce the contaminant concentrations in roundwater to levels indicating DNAPL was below concentrations protective of human health and the environment. ...
ProblemAs a result of trichloroethene (TCE) releases to groundwater during the 1960’s, TCE is now found in the sandy aquifer beneath the Site in the form of a dense, non-aqueous phase liquid (DNAPL). Testing for the vinyl chloride reductase (vcrA) gene (Gene-Trac-VC) and bench scale treatability testing indicated that native Dehalococcoides (Dhc) found at the Site were not ...
BySiREM
Under natural conditions, the dissolution of DNAPL is very slow, allowing groundwater plumes to persist for many decades if the dissolution rate cannot be enhanced. As a result of these challenges, the USEPA, Interstate Technology and Regulatory Council (ITRC), and the Department of Defense Strategic Environmental Research and Development Program (SERDP) have devoted significant ...
ByArcadis