Project Summary
An active shopping mall located in Georgia was impacted by chlorinated solvents following operations from the operations of a dry cleaner tenant. The primary contaminants of concern included tetrachloroethene (PCE), trichloroethene (TCE), dichloroethane (DCE) and vinyl chloride (VC).
Provect-ERD™ and ERD-CH4™ were selected for a side-by-side comparison to evaluate the methane concentrations in addition to contaminant reductions.
Remedial Plan
ISCR application to address two target areas, located approximately 200 feet cross gradient.
Results
- MW-4 (standard ERD, no methane inhibitors) had over 30% CH₄ in headspace gas — TVA detectors exceeded their level of sensitivity and shut down.
- MW-207s (ERD-CH4™ with antimethanogenic compounds) had only 0.5% CH₄ in headspace gas.
- ERD-CH4™ demonstrated a ~98% reduction in methane generation compared to the standard ERD amendment.
- Dissolved methane pre-injection at MW-207s was only 11.8 ppm compared to 13,700 ppm at MW-4.
Well Head Gas Analysis (6 Weeks Post Application)
| Well Location | CH₄ TGA % | CO₂ % | O₂ % |
|---|---|---|---|
| MW-4 (Standard ERD) — 0 min | 34.8% | 65.2% | 0.0% |
| MW-4 (Standard ERD) — 5 min | 35.6% | 61.0% | 0.2% |
| MW-207s (ERD-CH4™) — 0 min | 0.5% | 1.0% | 12.7% |
| MW-207s (ERD-CH4™) — 5 min | 0.4% | 0.7% | 20.2% |
Project Details
- Location
- Georgia, USA
- Site Type
- Shopping Mall
- Technology
- ISCR
- Product Used
- Contaminants
- PCE, TCE, DCE & VC
- Source
- Former Dry Cleaning Operation
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