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 litres 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 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 litres 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.
This article explores the limitations of conventional field screening in environmental site assessments, particularly in heterogeneous soil conditions. It introduces the US EPA’s Triad Approach as a more dynamic and data-driven framework—emphasizing systematic planning, adaptive sampling, and real-time decision-making. AISCT (Artificial Intelligence Site Characterization Technology) is highlighted as a tool that enhances confidence in field data through real-time QA/QC metrics like %RPD and %COV. A field case study demonstrates how AISCT was used to identify inconsistencies in stockpile mixing, leading to improved treatment accuracy and cost savings. The article challenges outdated expectations of lab-to-field equivalence and advocates for a smarter, more transparent approach to site characterization.
Today, we dive deeper into the internal challenges that impact your operations, particularly focusing on the sustainability issues tied to moving soil—and the risks of mistakenly moving clean soil.
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