A pipeline release site in Central Alberta faced residual petroleum hydrocarbon contamination (BTEX, F1, F2) that could not be fully treated with a multi-phase extraction system. Due to site lithology, a risk-based in-situ chemical oxidation (ISCO) approach was implemented with a 1.5 to 2.5 meter injection radius, installing 12 injection wells and injecting 6,500 liters of 12% EHP (enhanced hydrogen peroxide) followed by 3,700 liters of 15% sodium persulfate using TRIUM’s ChemOx® process. The treatment successfully removed all residual NAPL, fully remediated the plume area, and exceeded performance expectations within a short timeframe.
Pipeline release was being treated using a multi-phase extraction system for non-aqueous phase liquids (NAPL). Residual contamination was unable to be treated using the current system. Lithology at the site comprised of clay with sand lenses as preferential pathways. Petroleum hydrocarbon impacts from 4 to 6 meters below ground surface.
Risk based in-situ chemical oxidation (ISCO) program based on 1.5 to 2.5 meter injection radius of influence. Establish health and safety protocol and site logistics for handling oxidizer.
Installed 12 injection wells and injected 6,500 liters of blended 12% EHP (enhanced hydrogen peroxide) oxidant followed with 3,700 litres of a sodium persulfate 15% blend. Blending is site specific following TRIUM’s ChemOx® process.
A closure-based in-situ chemical oxidation (ISCO) remediation was conducted at a former gas station in Southern Alberta to address BTEX, F1, F2, and PAH contamination in 6,630 m³ of impacted soil, bedrock, and groundwater, including off-site impacts beneath residential properties. Due to infrastructure constraints and vapour risks, a Remediation Train® approach was implemented, starting with a soil vapour extraction (SVE) and air sparge system, followed by a ISCO program with a 3-meter injection radius. Nested injection wells targeted various depth intervals, with careful scheduling around residential activity. Over 45 days, 1.6 million liters of 10% EHP (enhanced hydrogen peroxide) was injected using TRIUM’s ChemOx® process, achieving daily blend volumes of >35,000 L. The treatment successfully met regulatory groundwater quality guidelines, managed vapour risks, and was recognized as an industry-leading process by consultants, with no negative impact on the community.
AISCT® revolutionizes site characterization with rapid, 20-minute soil and water analysis. This portable technology reduces lab dependence, enhances decision-making with real-time results, and ensures accurate volume estimations. It streamlines remediation, minimizes landfilling, and boosts confidence in project outcomes.
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