An in-situ chemical oxidation (ISCO) remediation was conducted at a residential property in North Vancouver to address petroleum hydrocarbons (LEPH), phenanthrene, and pyrene contamination in 200 m³ of impacted soil and groundwater following a heating oil UST leak that migrated under the building foundation, causing vapour intrusion and free product in property sumps. A 2.5-meter injection radius was used for targeted treatments within the basement and exterior property foundation, utilizing directional injections and drive-points to reach both saturated and unsaturated zones. TRIUM leveraged the property’s sump system to artificially raise the groundwater level, creating a fully saturated treatment zone. Over seven days, 24 basement injections and 3 exterior injections delivered 20,104 litres of sodium persulfate, blended using TRIUM’s TriOx process with specialized activation products. The treatment successfully met regulatory soil, groundwater, and vapour guidelines, required only six weeks for completion, and allowed the property owner to safely return home with minimal disturbance.
An in-situ chemical oxidation (ISCO) remediation was conducted at a former wellsite sump in Barrhead, Alberta to address BTEX, F1, and F2 contamination in 645 m³ of impacted soil and 3,000 m³ of impacted groundwater. Due to shallow groundwater and a saturated silty sand lithology, excavation was limited, requiring targeted in-situ treatment. A 0.75-meter injection radius was used for soil treatment via 40 injection points, delivering 28,000 liters of 10-15% MFR (modified Fenton’s reagent) over five days, while groundwater remediation involved 13 wells, injecting 60,000 liters over two events spanning 20 days. Using TRIUM’s TriOx process, the project achieved a >90% contaminant reduction, meeting regulatory guidelines within a short treatment timeframe.
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 catalyze a sequestration reaction and precipitate dissolved copper, forming a permeable reactive barrier to prevent further migration. Over two months, 1 million liters 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 center operations.
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.
A closure-based in-situ chemical oxidation (ISCO) program was implemented at an operational power generation plant in Northwestern Alberta to remediate F2 and vinyl chloride contamination in 300 m³ of impacted soil. Site constraints, including existing infrastructure and a lack of groundwater, required a 0.75-meter injection radius for increased contact certainty. Over five days, 37 injection points were advanced, delivering 32,800 liters of 12% EHP (enhanced hydrogen peroxide) using TRIUM’s ChemOx® process. The treatment successfully met applicable soil quality guidelines within a short timeframe, with no disruptions to facility operations.
A pipeline release at an active multi-well pad in Central Alberta required remediation due to BTEX, F1, F2, and PAH contamination in 2,000 m³ of impacted soil and groundwater, with remediation timeframes limited by site conditions. A staged risk-based in-situ chemical oxidation (ISCO) approach was implemented with a 3-meter injection radius, involving the installation of 52 injection wells and five permeable reaction trenches to facilitate groundwater extraction and oxidant circulation. A total of 17,500 liters of 12% EHP (enhanced hydrogen peroxide) was injected using TRIUM’s ChemOx® process, with injections timed during frost-cap months to maintain pressure. Results show a well-defined and shrinking plume, significant source area concentration reductions, and an approximate 90% decrease in PHC and PAH concentrations since project inception.
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.
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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