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BTEXMTBEISCO

Gas Station

Former fuelling-station groundwater and soil treatment

01

Western New York former gas station

Western New York, USA

Background

Long-term petroleum leakage contaminated groundwater and soil across 9,225 sq ft.

Technology Used

In-situ self-activated chemical oxidation combined with biological remediation

Approach

Sulfate radicals removed target pollutants directly, while decomposition by-products stimulated ongoing microbial activity.

Results

  • Volatile organic compound concentrations significantly decreased
  • Rapid degradation of persistent compounds including benzene
  • Remediation targets met after the initial injection, with no pollution rebound observed
02

Northwestern Pennsylvania former gas station

Northwestern Pennsylvania, USA

Background

Extended petroleum contamination in groundwater and soil across 10,775 sq ft of silty clay, gravel, sand and shale; 70 injection points installed.

Technology Used

Chemical oxidation for primary contamination, biological remediation for residual pollution

Approach

Combined oxidation and biological treatment delivered through a 70-point injection grid.

Results

  • Groundwater contamination fell below health-standard concentrations within 6 months
  • No free-phase pollutants detected; benzene below detection at the most heavily contaminated well (MW-7)
  • Project completed in under 9 months
03

St. Albans, West Virginia former gas station

St. Albans, West Virginia, USA

Background

A 3,775 sq ft contamination area at 6–12 ft depth in clay-dominant geology, monitored via wells MW-5R and MW-9.

Technology Used

P-OX® self-activated chemical oxidation (US Patent 9,126,245)

Approach

7,300 lb of P-OX® applied via 19 injection points using a proprietary injection method (US Patent 7,044,152), driving rapid oxidation followed by secondary biological remediation.

Results

  • Post-injection oxidation-reduction potential of +171.7 mV at MW-5R, with increased dissolved oxygen and conductivity confirming successful application
  • Target pollutants at MW-9 fell below detection limits
  • BTEX and MTBE concentrations declined across both wells
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