Wastewater treatment plant designed to treat the coal gasification process water blowdown known as grey water. This facility is integral to the operation of the gasification plant and utilizes a combination of large rotating equipment, advanced metallurgy, and specialized water treatment equipment to process up to 750 gallons per minute of grey water. Wilhelm was the lead contractor to coordinate the execution of the full scope of the facility, including underground utilities and foundations, setting of equipment, erection of storage tanks and process vessels, and construction of a 12,000 SF main process building.