DARcor provided electrical engineering design/build services for a new facility consisting of an ion exchange-type nitrate removal system that treats 1,850 gallons per minute (gpm), a 2 million-gallon (MG) storage reservoir, and a booster pump station that delivers 7,500 gpm for the Arizona Water Company’s water distribution system located in Casa Grande, Arizona.
The site included an electrical building, a standby generator, an automatic transfer switch, and a remote terminal unit (RTU) with an operator interface for monitoring and control, allowing remote monitoring from the SCADA master located in Casa Grande. The existing Well 29 SCADA system was used in conjunction with a fiber optic cable to remotely monitor and control the new facility from the existing SCADA master. Pole-mounted area lights and lighting under mechanical equipment shade canopies were provided for security and task lighting.
Two of the booster pumps were controlled by variable frequency drives (VFDs), while solid-state soft starters controlled four to maintain a constant discharge pressure. Sodium hypochlorite was used between the nitrate removal system and the storage reservoir to disinfect the treated well water supplied.
Post-design services were provided to attend the pre-construction meeting, review shop drawings and equipment submittals, respond to Contractor RFI’s, prepare field orders/directives, inspections, review O&M manuals, assist with startup and testing and prepare record drawings.
