- Docket Number
- 760 MW
- Contra Costa County
- Simple Cycle
- Project Status
- Operational (Natural Gas-Fired)
- Project Type
- Application for Certification
Marsh Landing Generating Station (MLGS) is located north of the City of Antioch in Contra Costa County on a 27-acre industrial site north of Wilbur Avenue.
The project is a nominal 760-megawatt (MW) facility consisting of four combustion turbines operating in simple-cycle mode, consisting of four Siemens 5000F combustion turbine units operating in simple-cycle mode.
MLGS provides Battery Energy Storage System (BESS) and associated equipment provides an additional output of 11.5 MW and 10.5 megawatt hours, designed to start the gas turbines and to restart the power plant in the event of a grid blackout to support the California Independent System Operator’s directed restoration of the electrical grid in response to an emergency condition (also known as “black start” capability).
On March 12, 2019, the California Energy Commission approved a Post-Certification Amendment (TN 227326) to allow the installation of a battery energy storage system to provide Black Start service in response to a need identified by the California Independent System Operator.
- Order Approving a Petition to Incorporate Design Refinements, TN 65221, 05/15/2012, Order No. 12-0425-02, Commission approval to replace pre-heaters, add reverse osmosis system, modify or remove certain water tanks, increase diameter of sewer pipeline, modify NH3 system, construct warehouse and modifying main access road.
- Order Approving a petition to modify Condition of Certification 810-8 to change the recipient of mitigation funds and provide a broader range of mitigation activities at the Antioch Dunes National Wildlife Refuge, TN 68754, 12/03/2012, Order No. 12-1114-03, Commission approval to modify recipient of mitigation funds required by BIO-8 from Friends of San Pablo Bay to California Wildlife Foundation and provide a broader range of mitigation activities.
- Order Approving Installation of a New Diesel Backup Generator, a Diesel Fire Pump Engine and 150 Feet of Fire Loop Piping, TN 203440, 12/12/2014, Order No. 14-1117-08, Commission approval to install a new diesel backup generator, a diesel fire pump engine and 150 feet of fire loop piping, and modification of Air Quality conditions of certification to address diesel engine operation and monitoring, and Biological Resources condition of certification requiring surrender of additional emission reduction credits and increased annual mitigation payments to offset a slight nitrogen deposition increase.
- Notice of Determination for Approval to Install a Modular Building for Document Storage, TN 203876, 03/13/2016, Staff approval to install a 12-foot by 42-foot modular building, approximately 504 square feet in area and 12-foot 9-inches tall, on an existing asphalt-covered area. The modular building would be for document storage and staff training purposes.
- Change in the Language of Verification for Condition of Certification BIO-8, TN 213909, 10/05/2016, Staff approval to modify the verification language for BIO-8 so that the annual report documenting how each annual payment required by BIO-8 is spent be included with the submittal of the ACR instead of 30 days past the date of receipt from the California Wildlife Foundation.
- Notice of Determination for Approval to Install Additional Asphalt Paving on Access Roads, TN 217512, 05/09/2017, Staff approval to install 37,000 square feet of additional asphalt paving on the access roads within the licensed project boundaries. The installation of asphalt pavement is considered a necessary Best Management Practice for controlling the excessive sediments caused by the unpaved dirt roads that provide access to the warehouse for material deliveries.
- Order Approving to Allow the Installation of a Battery Energy Storage System, TN 227326, 03/13/2019, Order No. 19-0312-02, Commission approval to allow the installation of a battery energy storage system (BESS) to provide Black Start service in response to a need identified by the California Independent System Operator. The batteries would be used to start the gas turbines to restart the power plant in the event of a blackout, thereby supporting the restoration of the electrical grid in response to an emergency condition.
- Statement of Staff Approval of Changes to Title V Conditions of Certification Related to Combustion Turbine Tuning Events, TN 237869, 05/20/2021, Staff approval of changes to the tuning duration restriction and required frequency of source testing.
- Statement of Staff Approval of to modify the previously approved (TN 227326) Battery Energy Storage System (BESS), TN 238098, 06/02/2021, Staff approval to use a lithium ferrous phosphate (LFP) battery chemistry for improved reliability and capacity requirements.
Attention: Non-hypertext items above will need to be requested from the Compliance Project Manager, along with the document TN number, if provided above.
Power Plant Certification and Exemption Processes
The CEC has the exclusive authority to certify all thermal power plants 50 megawatts (MW) and larger and related facilities proposed for construction in California. The Application for Certification (AFC) process is a certified regulatory program under the California Environmental Quality Act (CEQA). As a certified regulatory program, the CEC does not prepare environmental impact reports (EIRs) in an AFC proceeding, but instead prepares environmental assessment documents that are functionally equivalent to EIRs. A certificate issued by the CEC is in lieu of any permit, certificate, or similar document otherwise required by any state, local or regional agency, or federal agency to the extent permitted by federal law, and supersedes any applicable statute, ordinance, or regulation of any state, local, or regional agency, or federal agency to the extent permitted by federal law.