Sewage Treatment Plants, Denitrification and Master Plan Upgrades Project

2 Documents in Project

Summary

SCH Number
2021030222
Lead Agency
Town of Discovery Bay
Document Title
Sewage Treatment Plants, Denitrification and Master Plan Upgrades Project
Document Type
NOD - Notice of Determination
Received
Posted
4/22/2021

Document Description
The Town of Discovery Bay community Services District is making modifications to its 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. Improvements will take place in areas of existing pavement and areas previously graded for future process improvements. Process improvements include adding an oxidation ditch and three new anoxic chambers in front of the existing and new oxidations ditch at Plant 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. Construction activities will include excavation to 16 feet deep, paving and grading of approximately 1.5 acres, construction of new concrete structures, modification of existing concrete structures, Civil and mechanical piping and pumping systems, and electrical support systems. All storm water for the facility is collected and treated on site. Excavations will follow approved Storm Water Pollution Prevention Plan (SWPPP) control procedures. Construction dust control will follow standard guidelines. Construction crew size will normally vary between 5 to 10 people. There will be occasional truck deliveries of process equipment, rock, asphalt, rebar, and concrete. Total construction period is estimated to take 18 to 24 months.

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

Phone : (925) 775-5028
myeraka@todb.ca.gov

Location

Coordinates
37°53'24.6"N 121°35'11.5"W
Counties
Contra Costa
Cross Streets
HWY 4 and Channel Road., Discovery Bay, CA 94505
Zip
94505
Total Acres
75
Parcel #
008-330-017, 008-340-040
State Highways
Highway 4
Railways
None
Airports
None
Schools
Discovery Bay Elem. Timber Point
Waterways
Old River
Township
T1N
Range
R4E
Section
31
Base
Diablo

Notice of Determination

Approving Agency
Town of Discovery Bay Community Services District
Approving Agency Role
Lead Agency
Approved On
County Clerk
Contra Costa
Final Environmental Document Available at
1800 Willow Lake Rd. Discovery Bay, CA 94505

Determinations

(1) The project will have a significant impact on the environment
No
(2a) An Environmental Impact Report was prepared for this project pursuant to the provisions of CEQA
No
(2b) A Mitigated or a Negative Declaration was prepared for this project pursuant to the provisions of CEQA
Yes
(2c) An other document type was prepared for this project pursuant to the provisions of CEQA
No
(3) Mitigated measures were made a condition of the approval of the project
Yes
(4) A mitigation reporting or monitoring plan was adopted for this project
Yes
(5) A Statement of Overriding Considerations was adopted for this project
No
(6) Findings were made pursuant to the provisions of CEQA
Yes

Attachments

Notice of Determination
Notice of Determination_TODB Denite   PDF 857 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 state.clearinghouse@opr.ca.gov or via phone at (916) 445-0613. For more information, please visit OPR’s Accessibility Site.

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