Groundwater Recovery System Optimization and Upgrade

Project Profile

Project Location : Connecticut
Client Industry : Subcontractor/ Consultant
Owner Industry : Pharma
Gwtt Scope : Civil Work, System Build, Equipment
Contract Value : $600K
Project Duration : 5 Months

Key Project Details

Supply and install (1) 9 ft X 6 ft X 7’-6” tall, insulated Fiberglass Enclosure
Supply and install (2) 5 hp influent pumps with VFD’s and associated 4” suction /discharge piping
Supply and install an extension of the 8” IPC floor sump line and the 3” influent HDPE line
Supply and Install new electrical power conduit, equipment and wiring for the new piping, valves, pumps, flow meters and heat tracing
Test piping systems, electrical, and control systems
Install ground wire loop with grounding rods around perimeer of newly relocated switchgear (pad), transformer TR-1 (pad), new circuit breaker / automatic transfer switch (ATS) / switchboard (pad), and existing generator junction box
Supply and install conduits from 480V 1600 amp CB / ATS / switchboard panel to the three MCCs
Replace electrical feed cables
Remove transformers

PROJECT CHALLENGES

The largest obstacle that GWTT encountered during this project was the uncovering of two existing lines that were not accurately located on the existing as-built drawing.
Additional excavation work resolved the issue, although both schedule and budget were impacted. GWTT added additional personnel during the rerouting of the aboveground piping to recover the lost time.

Project Narrative

GWTT was contracted to procure and modify a deep groundwater recovery system piping, pumps, and electrical at a Pharma site
in North Haven Connecticut.

The piping to the equalization tanks was installed elevated above ground with heat trace insulation and jacketing. Two new
pumps were installed with heat enclosures including piping valves and instrumentation. Additionally, a heated shed enclosure
was provided and installed for the auto sampler.
The electrical service was upgraded, and the old feed lines were pulled from the underground conduits. The switch gear and auto
transfer switches were relocated and placed on newly poured concrete pads. Conduit and power were routed to these components
and then terminated at the distribution panel.

This project required continuous communication and coordination with the design engineer and the on-site O&M Contractor.

The system remained operational throughout the project with scheduled minor power outages. The largest obstacle that
GWTT encountered during this project was the uncovering of two existing lines that were not accurately located on the existing
as-built drawing. Additional excavation work resolved the issue, although both schedule and budget were impacted. GWTT
added additional personnel during the rerouting of the above ground piping to recover the lost time.