Permanent Groundwater Treatment System

Project Profile

  • Project Location : New Jersey
  • Client Industry : Contractor / Consultant
  • Owner Industry : Pharmaceutical / Chemical
  • Gwtt Scope : Design / Build
  • Contract Value : $6M
  • Project Duration : 6 Months
  • Contaminants : Extensive VOCs, Semi-VOCs, Metals
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Key Project Details

  • Built permanent groundwater treatment facility
  • Utilized BIM to facilitate complex design and site conditions
  • Installation of more than 8,000 LF of process piping with sizes ranging from 1” to 18” diameter
  • Process treatment installation included ultrafiltration membrane, metals precipitation system, 4x 20,000 lb liquid phase GAC units, arsenic adsorption system, centrifuge and conveyor system, and chemical feed system
  • No recordable incidents
  • Superfund site

PROJECT CHALLENGES

  • GWTT was required to complete the project on an extremely accelerated schedule after being hired to take the place of another contractor who had been removed from the project.
  • GWTT completed the project by extending work weeks and having a team of multiple superintendents and engineers to manage the work.

Project Narrative

GWTT was contracted to construct a groundwater treatment system at a large Superfund site located in New Jersey. The system has a capacity of 500 GPM and is capable of treating a wide range of metals, VOCs, and SVOCs. The project was executed on an accelerated schedule of less than 6 months and required GWTT to work extended 60-hour work weeks with a workforce of up to 35 pipefitters and plumbers.

A detailed final piping layout and structural pipe support system were required to be performed. GWTT directed the design work utilizing BIM (Building Information Modeling) in order to effectively run the pipe through the treatment system and to avoid any conflicts with the other building systems. The BIM was utilized by management to visualize the system in order to assist with early design decisions and by the workers to facilitate an efficient installation.

The treatment system included the installation of an ultrafiltration membrane, a metals precipitation system, 4x 20,000 lb liquid phase GAC units, an arsenic adsorption system, a centrifuge, a conveyor system, and a chemical feed system. Over 8,000 LF of interconnecting pipe was installed by GWTT, and the treatment process included 27 transfer and mixing pumps up to 30 HP and 15 chemical feed pumps. A portion of the work was performed at the equalization tanks, which consisted of two 330,000-gal tanks in a remote area and included an extensive elevated piping network. In addition, GWTT installed six aeration and foul air blowers, an air compressor, a heat exchanger, a boiler, and insulation for all outdoor exposed piping.

All work was completed without any OSHA recordable incidents or environmental issues.