Project L-691, 200 West Area Sanitary Sewage LagoonCX(s) Applied: B1.26Date: 01/31/2011Location(s): Richland, WashingtonOffice(s): Office of River Protection-Richland Office
Office of NEPA Policy and Compliance
January 31, 2011
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CX(s) Applied: B1.26
Date: 01/31/2011
Location(s): Richland, Washington
Office(s): Office of River Protection-Richland Office
Project L-691 will construct a sanitary sewage lagoon system near the 200 West Area of the Hanford Site. This sanitary sewage lagoon system will include a septage dump station, a multi-cell sewage lagoon plant, a septage stabilization facility, and an intermittent filter system with an evaporative lagoon. Current plans are to locate the new facility directly north of the 200 West Area perimeter fence line; near the northeast corner. The sanitary sewage lagoon system will be partially above grade and will be double lined with flexible membranes. The sanitary sewage lagoon system will be designed for a flow of approximately 50,000 gallons per day and will be constructed with a leak detection and monitoring system. The sanitary sewage lagoon system will be capable of receiving wastewater and septage from the service areas within the Hanford Site, treating the wastewater, disposing the biosolids, and discharging the effluent to the evaporative lagoon, while achieving zero-discharge to the soil column. The sanitary sewage lagoon system will disturb an area approximately 31 acres in size.