Dry Cleaner facility redevelopment opportunity DNAPL source zone ERDEnhanced In-Situ Remediation Pilot Study Stoney Creek, Ontario Canada case study

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Courtesy of BioStryke Remediation Products LLC

Project Highlights

  • ERDENHANCED Pilot Study >72% reduction in PCE molar mass in 8-month period.
  • ERDENHANCED Proven CostEffective Green Source Mass Destruction Strategy
  • ERDENHANCED Proven CostEffective Sustainable Biostimulation Strategy
  • ERDENHANCED evaluation performed under Ministry of Environment (MOE) approval
  • ERDENHANCED Pilot Study Demonstrated Contaminant
  • Reductions in 8-months:
    • >81% PCE
    • >92% TCE
    • >80% cis-DCE
  • ERDENHANCED Reduces Site Time, Operational Costs
  • ERDENHANCED Provides LongTerm Complete cVOC Biotransformation
  • ERDENHANCED Maximum Solubility Providing Multiple Deployment Options with Minimal Water Usage

BioStryke Remediation Products, LLC, provide innovative and cost-effective amendment formulations designed to biostimulate treatment zone conditions and enhance the in-situ destruction of Site contaminants. BioStryke ERDENHANCED leverages existing conditions facilitating passive-aggressive destruction of cVOC dissolved, sorbed, residual source mass eliminating above-ground, energy-consuming emissions-generating equipment. ERDENHANCED is proven effective in terms of both cost and performance, allowing Site compliance with less environmental impact, working with Mother Nature, not against.

A current Site activity at the multiuse building includes retail dry cleaning distribution. Past Site use included dry cleaning operations with the handling of the chlorinated volatile organic compound (cVOC) tetrachloroethylene (PCE) resulting in adverse impacts to subsurface soils and groundwater. Previous remedial efforts have proven costly, and additional work is required to facilitate redevelopment. In an effort to identify a sustainable in-situ remedial strategy, the City of Hamilton Ontario and the Site Owner implemented a Pilot Study to evaluate the efficacy of ERDENHANCED under actual Site conditions. Within 8-months of the evaluation treatment zone cVOC concentrations realized the following:

  • Tetrachloroethylene (PCE) decreased >81%
  • Trichloroethylene (TCE) decreased >92%
  • cis-DCE decreased >80% and
  • 100% reduction in VC after short generation period

The City of Hamilton sponsored Pilot Study demonstrated BioStryke ERDENHANCED a cost-effective strategy for passive-aggressive source zone cVOC contaminant destruction. The Pilot Study provided a low-cost low-risk efficacy evaluation process prior to full-scale remedial strategy commitment. Pilot Study groundwater was amended using Passive Release Sock (PRS) deployment units filled with ERDENHANCED. PRS units fit within existing 2-inch groundwater monitoring well. PRS units remain suspended within the screened interval of the test well, undisturbed, passiveaggressively amending a vertical column with an area-of-influence (AOI) of < 3-ft. Groundwater sample/analytical testing events are performed at the start, and at regular intervals throughout the evaluation, to include replacement of PRS deployment units. PRS Pilot Study provides a low-cost, low-risk process for Owner(s), Regulators, and Practitioners to evaluate amendments ability prior to full-scale remedial commitment.

BioStryke amendments are suitable for any type of deployment such as Direct Push Technology (DPT), infiltrations gallery, and direct application due to enhanced solubility.

BioStryke amendments are easy to handle, requiring less water, less pore space displacement, less site time, less overall remedial costs.
BioStryke amendments maximize project margins while minimizing project impacts.

At the site, source area PCE groundwater concentrations ≈ 5,000 micrograms per liter (µg/L). As noted on the previous page, the AOI of the amended test well is very limited, resulting in no long-term impact to site geochemical conditions. As such, Pilot Study impacts are very short lived with groundwater conditions typically returning to baseline conditions in less time than it took to complete the evaluation. However, due to the proprietary components found in ERDENHANCED, full-scale amendment is proven sustainable after a single deployment event.

BioStryke ERDENHANCED facilitates both dissolved phase and residual source mass contaminant destruction by stimulating native microbial populations to scavenge competing terminal electron acceptors (TEAs) such as oxygen, nitrate, oxidized iron/manganese, and sulfate which typically limit cVOC dechlorination. ERDENHANCED also facilitates the generation of volatile fatty acids (VFAs) which provide a surfactant affect, assisting desorption and increased bioavailability of residual contaminants. The graph below summarizes the performance data (µg/L) collected during the herein described Pilot Study.

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