Case Study
Westvaco Chemical — North Charleston, SC
Secondary containment liner retrofit for above-ground chemical storage tanks, stopping groundwater leakage from deteriorated concrete.
The Challenge
Problem
Westvaco Chemical's above-ground storage tanks had existing concrete secondary containment that had deteriorated over the years, allowing leakage into groundwater. The project required placing a secondary containment liner over the existing concrete around tanks, piping supports, and containment walls — all without interrupting plant operations.
Our Approach
Solution
EFI installed Seaman 8130 XR-5 geomembrane liner, selected for its excellent chemical resistance and UV properties, over an 8 oz. nonwoven geotextile cushion. The geotextile and liner were sealed to concrete tank bases and walls using stainless steel batten strips with gaskets and anchor bolts. Seaman Tuff-Trac walkways were welded to the liner surface for equipment access within the containment area.
Outcomes
Results & Metrics
Key Outcomes
- All leakage into groundwater stopped completely
- Environmental compliance with groundwater regulations achieved
- Upgrade completed without interrupting plant operations
- Chemical-resistant XR-5 liner provides long-term durability
- Tuff-Trac walkways enable safe equipment access
“The XR-5 liner system stopped all groundwater leakage from our deteriorated concrete containment, and EFI did it without shutting down our plant for a single day.”
Facility Manager, Westvaco Chemical
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