The Problem
The North Shore Waste Water Treatment Plant project presented a complex remediation challenge in North Vancouver. The groundwater was contaminated with both heavy metals and hydrocarbons, requiring a rigorous treatment process before discharge. Further complicating the logistics, the site had no access to grid power, and the 200 GPM pumping requirement meant that any system failure would lead to immediate flooding, significant financial losses for the City, and environmental damage. Precision planning was essential to manage these high risk contaminants over a multi year timeline without the safety net of permanent site utilities.
The Solutions
Nexgen engineered a fully self contained, 200 GPM ESC system powered by on site generators to ensure uninterrupted 24/7 operation. The solution featured a robust settling stage with four 5,000 gallon tanks to manage solids, followed by a sophisticated filtration train. We integrated an injection unit and sand filters for primary polishing, leading into specialized Carbon Vessels loaded with Virgin Carbon to strip hydrocarbons and dissolved metals. This mobile, off grid setup allowed for continuous monitoring and a same day response standard, ensuring the treatment remained effective regardless of fluctuating contaminant levels or weather conditions.
The Result
The dewatering and treatment system successfully maintained a dry, stable excavation for the entire 31 month project duration. Despite the complexity of the contaminants and the reliance on portable power, Nexgen achieved 100% environmental compliance with zero violations or incidents. The project benefited from zero dewatering related stoppages, preventing the catastrophic delays and further financial losses originally feared by the client. The successful long term deployment highlighted Nexgen’s ability to provide professional coordination and reliable off grid solutions for high stakes municipal infrastructure projects.
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