Primary Digester No. 7 Project

2 Documents in Project


SCH Number
Lead Agency
Union Sanitary District
Document Title
Primary Digester No. 7 Project
Document Type
MND - Mitigated Negative Declaration

Document Description
Note: Review Per Lead The project consists of a new Digester No. 7, transfer tank, iron salts facility, replacement boiler, and various pipeline and utility improvements with USD's Alvarado WWTP. In 2016, results from a capacity assessment indicated that current volatile solids landings for anaerobic digestion are at original design capacity with all digesters in service. Additionally, it was determined that Digester No. 6, the largest existing digester cannot reliably be taken out of service for cleaning until additional digestion capacity is provided.

Contact Information
Curtis Bosick
Union Sanitary District
5072 Benson Road
Fremont, CA 94587

(510) 477-7607


Union City
State Highways
Old Alameda Creek

Notice of Completion

Review Period Start
Review Period End
Development Type
Waste Treatment:Other
Project Issues
Cumulative Effects Wetland/Riparian Water Supply Water Quality Vegetation Traffic/Circulation Toxic/Hazardous Soil Erosion/Compaction/Grading Noise Geologic/Seismic Flood Plain/Flooding Drainage/Absorption Biological Resources Archaeologic-Historic Air Quality Aesthetic/Visual
Reviewing Agencies
Native American Heritage Commission California Department of Parks and Recreation California Public Utilities Commission Caltrans, District 4 Department of Fish and Wildlife, Region 3 Department of Toxic Substances Control Department of Water Resources Office of Emergency Services, California Regional Water Quality Control Board, Region 2 Resources Agency Resources, Recycling and Recovery State Water Resources Control Board, Division of Drinking Water
Download CSV New Search