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Project Profile
- Project Location : Central Massachusetts
- Client Industry : Industrial Manufacturing
- Owner Industry : Contractor/Consultant
- Gwtt Scope : Design, Build, O&M
- Contract Value : $410K
- Project Duration : 5 Months
- Contaminants : PFAS
Key Project Details
- GWTT retained under a design-build contract basis to provide of a rooftop stormwater collection and treatment system for PFAS compounds.
- 14 custom scuppers were fabricated to collect roof top stormwater into a network of 6-inch, 8-inch and, 10-inch PVC conveyance piping
- GWTT supplied and installed all required treatment equipment, including 40,000 gallon capacity storage tanks and a 50 gpm carbon based treatment system with custom control system
PROJECT CHALLENGES
- Specialized collection and treatment system
- Compressed project timeline based on regulatory requirements for completion
- Treatment system capacity had to allow for runoff volume of water from a 10-Year, 24-Hour storm event
Project Narrative
GWTT was contracted to build a rooftop stormwater collection and conveyance system, and a permanent water treatment system to recover & treat PFAS impacted stormwater at an industrial manufacturing facility in MA. The PFAS impacted stormwater is related to industrial emission discharges at the manufacturing facility. GWTT also assisted the Owner and Engineer with the design of the system. Fourteen custom scupper boxes were fabricated to collect the roof top stormwater into a network of conveyance piping. The piping was installed and pitched so stormwater would drain via gravity to the treatment system which is housed in a 40-foot shipping container staged behind the building. The 40-foot shipping container was prefabricated in house and is equipped with heating, lighting, and ventilation.
GWTT custom fabricated and installed the treatment system to collect and treat the PFAS-impacted recovered water. Prior to the treatment system, water is stored in two 21,000-gallon closed top frac tanks equipped with tank immersion heaters. Water is pumped from the tanks via centrifugal pumps controlled by float switches to the treatment system. The treatment system includes a duplex pump skid, four single bag filter housings, two 2,000lb granular activated carbon (GAC) vessels, and all associated flow meters, gauges, and sample ports. The system included a control panel with alarms, switches, and controls that automatically operates the system.