The City of Tucson operates a pump-and-treat system to control the migration of VOCs in groundwater at this WQARF site. This system is expensive and problematic to operate because of declining water levels — which reduce well capacities — and fouling in extraction wells.
M&A evaluated various remediation strategies to identify an alternative that would achieve the City’s objectives and reduce operating costs.
- Analyzed historical water level, water quality, and pump-and-treat operational data
- Developed and calibrated a new groundwater model (using MODFLOW/MT3D) to evaluate a range of remedial alternatives
- Used the model to project the future performance of the current pump-and-treat remedy compared to a “monitoring only” remedy