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 litres of 12% EHP (enhanced hydrogen peroxide) followed by 3,700 litres 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 litres 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 risk-based in-situ chemical oxidation (ISCO) remediation is ongoing at an urban mall parking lot in Southern Alberta to address a large copper plume in 1,000 m³ of impacted groundwater, with a freshwater receptor located down-gradient. Due to infrastructure constraints, a 5-meter radius injection program using hydrogen peroxide was implemented to catalyse a sequestration reaction and precipitate dissolved copper, forming a permeable reactive barrier to prevent further migration. Over two months, 1 million litres of blended hydrogen peroxide and reagents were injected using TRIUM’s ChemOx® process, ensuring long-term effectiveness with a reactive barrier lasting approximately five years. The remediation has been effective at both the source zone and down-gradient areas, with ongoing injections near the water receptor, achieving results without disrupting shopping centre operations.
Receive exclusive emails about our services, company updates and events, career opportunities, and more.
