Sewage Treatment Plants, Denitrification and Master Plan Upgrades Project


SCH Number
Lead Agency
Discovery Bay, town of
Document Title
Sewage Treatment Plants, Denitrification and Master Plan Upgrades Project
Document Type
MND - Mitigated Negative Declaration
Present Land Use
Public/Semi Public, P-1 and A-3 Agricultural

Document Description
Modifications to Town wastewater treatment plants to comply with new National Pollution Discharge Elimination System (NPDES) permit changes. Changes include modifying the process to reduce effluent total nitrogen below 10 mg/l. Process improvements will take place within the existing fence line at Wastewater Treatment Plant No. 2 at 17501 Highway 4 Discovery Bay, CA 94505. Some minor piping modifications will take place at Plant No. 1 in order to accommodate the work at Plant No. 2. The process changes will not result in an increase of capacity for the Wastewater Treatment Plants. Other improvements include replacing the screen at the headworks, piping and pumping system changes to support the new process, and other maintenance items. The consequesnce for not completing the project would be that the Town would not meet it's new discharge permit requirements for total nitrogen.

Contact Information
Mike Yeraka
Town of Discovery Bay
Lead/Public Agency
1800 Willow Lake Rd.
Discovery Bay, CA 94505

Phone : (925) 775-5028


37°53'24.6"N 121°35'11.5"W
Contra Costa
Cross Streets
Channel Road and Highway 4
Total Acres
Parcel #
008-330-017, 008-340-040
State Highways
Highway 4

Notice of Completion

Review Period Start
Review Period End
Development Type
Water Facilities (Wastewater Treatment Plant Upgrades)(Type Oxidation Ditch, MGD 2.35)
Local Action
Construction Project
Project Issues
Cultural Resources
Reviewing Agencies
California Air Resources Board (ARB) California Department of Conservation (DOC) 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 Department of Water Resources (DWR) California Highway Patrol (CHP) California Native American Heritage Commission (NAHC) California Natural Resources Agency California Regional Water Quality Control Board, Central Valley Sacramento Region 5 (RWQCB) California State Lands Commission (SLC) Central Valley Flood Protection Board State Water Resources Control Board, Division of Drinking Water State Water Resources Control Board, Division of Water Quality State Water Resources Control Board, Divison of Financial Assistance


Draft Environmental Document [Draft IS, NOI_NOA_Public notices, OPR Summary Form, Appx,]
_SCH Summary Form TODB   PDF 613 K Town of Discovery Bay Denitrification Project IS-MND   PDF 1656 K Town of Discovery Bay Denitrification Project NOI   PDF 2502 K
Notice of Completion [NOC] Transmittal form
NOC   PDF 1746 K

Disclaimer: The Governor’s Office of Planning and Research (OPR) accepts no responsibility for the content or accessibility of these documents. To obtain an attachment in a different format, 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. For more information, please visit OPR’s Accessibility Site.

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