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
Present Land Use
Alvarado Wastewater Treatment Plant - Civic facility/civic facility
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
Agency Name
Union Sanitary District
Contact Types
Lead/Public Agency


Union City
State Highways
Old Alameda Creek

Notice of Completion

Review Period Start
Review Period End
Development Types
Waste Treatment:Other
Project Issues
Aesthetics, Air Quality, Biological Resources, Cultural Resources, Cumulative Effects, Drainage/Absorption, Flood Plain/Flooding, Geology/Soils, Hazards & Hazardous Materials, Hydrology/Water Quality, Noise, Transportation, Vegetation, Wetland/Riparian
Reviewing Agencies
California Department of Fish and Wildlife, Bay Delta Region 3 (CDFW), California Department of Parks and Recreation, California Department of Transportation, District 4 (DOT), California Public Utilities Commission (CPUC), California Regional Water Quality Control Board, San Francisco Bay Region 2 (RWQCB), Department of Toxic Substances Control, Department of Water Resources, Office of Emergency Services, California, Resources Agency, Resources, Recycling and Recovery, State Water Resources Control Board, Division of Drinking Water, California Native American Heritage Commission (NAHC)
Reviewing Agency Comments
California Native American Heritage Commission (NAHC)

Disclaimer: The document was originally posted before CEQAnet had the capability to host attachments for the public. To obtain the original attachments for this document, please contact the lead agency at the contact information listed above. You may also contact the OPR via email at or via phone at (916) 445-0613.

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