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Conti Federal Services is currently performing a comprehensive groundwater remediation system at the Tutu Wellfield Superfund Site in St. Thomas, U.S. Virgin Islands. This strategic project addresses long-standing groundwater contamination through advanced treatment technologies and site infrastructure improvements.

The project centers on the expansion and modernization of the existing pump-and-treat system. Key components include the installation of downgradient extraction wells, reinjection of treated water to create a hydraulic barrier, and upgrades to existing systems to enhance treatment capacity and efficiency.

The design-build scope includes:

  • Expansion of the pump-and-treat system with new downgradient extraction wells
  • Upgrades to the existing Operable Unit 1 (OU1) treatment system to handle higher flow rates
  • Modernization of treatment equipment for improved performance
  • Reinjection of treated groundwater and discharge to Turpentine Run to control contaminant migration
  • Use of alternate pumping from select high-contamination monitoring wells
  • Implementation of long-term groundwater monitoring to ensure Remedial Action Objectives (RAOs) are met

The contract incorporates both prescriptive and performance-based design elements. Critical infrastructure components—including extraction wells, monitoring wells, an injection well, and wellhead completions—have been carefully designed based on site-specific hydrogeological data and experience from similar groundwater remediation projects.

Additional site improvements will include:

  • Installation of an exterior equalization tank, oil/water separator, and vapor-phase treatment tanks
  • Yard piping network for fluid management
  • Construction of a new 8-foot security fence around the treatment facility
  • Electrical upgrades to support enhanced operations
  • Removable canopy structure to protect tanks from UV exposure and degradation
  • Extraction well vaults and underground piping
  • Effluent distribution chamber
  • Gravity-fed effluent lines to the injection well and Turpentine Run
  • Grading of adjacent areas and installation of gravel stone for improved site stability

This project reflects Conti Federal’s continued commitment to delivering innovative, sustainable, and effective solutions to complex environmental challenges. With decades of experience in groundwater remediation and Superfund site cleanups, Conti Federal is proud to play a role in restoring the Tutu Wellfield site to protect public health and the surrounding ecosystem.