Former Dry Cleaner facility strip mall redevelopment DNAPL Source Zone Green ERD Remediation Burlington, Ontario Canada case study


Courtesy of BioStryke Remediation Products LLC

Project Highlights

  • ERDENHANCED Pilot Study >62% reduction in PCE molar mass in 9-month period.
  • ERDENHANCED Proven Cost-Effective Green Biostimulation Strategy
  • ERDENHANCED Proven Cost-Effective Sustainable Biostimulation Strategy
  • ERDENHANCED evaluation performed under Ministry of Environment (MOE) approval
  • ERDENHANCED Pilot Study Demonstrated Contaminant Reductions in 9-months:
    • >81.5% PCE
    • >83.5% TCE
    • >57% cis-DCE
  • ERDENHANCED Reduces Site Time, Operational Costs
  • ERDENHANCED Provides Long-Term 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 Her.

The Site is a former dry cleaner located at the end unit of a suburban strip-mall where tetrachloroethylene (PCE), trichloroethylene (TCE), cis-1,2-dichloroethylene and chloroform have been documented at concentrations above Ontario Ministry of Environment (MOE) standards. In preparation for the establishment of an in-situ reductive dechlorination program and with MOE approval, a Pilot Study was implemented to evaluate the efficacy of ERDENHANCED under actual Site conditions. Within 6-months:

  • Concentrations Tetrachloroethylene (PCE) decreased >81.5%
  • Concentrations Trichloroethylene (TCE) decreased >83.5%
  • Concentrations cis-Dichloroethylene (DCE) decreased >57% and
  • >62% reduction in PCE molar mass in < 9-months.

The MOE sponsored Pilot Study demonstrated BioStryke amendment ERDENHANCED a cost-effective strategy for passive-aggressive source zone cVOC contaminant destruction providing a low-cost low-risk process to evaluate amendment efficacy prior to full-scale remedial strategy commitment. Pilot Study groundwater was amended using Passive Release Sock (PRS) deployment units. Amendment filled PRS units fit within existing 2-inch groundwater monitoring well. PRS units remain suspended within the screened interval of the test well, undisturbed, passive-aggressively 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 ≈ 13,000 micrograms per liter (µg/L) in monitoring well MW-8 located proximate to the former equipment room, the well chosen for amendment deployment. 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. The graph below summarizes the performance data (µg/L) collected during the herein described Pilot Study.

It is of great importance to note prior to full-scale deployment of ERDENHANCED little detectable concentrations of daughter products were observed indicating minimal biodegradation occurring. Subsequent to full-scale deployment of ERDENHANCED, contaminant destruction rates increased dramatically and continued in a cost-effective and sustainable manner. Table One below summarizes the results of groundwater performance monitoring and analytical testing during the 182-day evaluation period.

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