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Caithness Long Island Energy Center, South Yaphank, NY

New York State Department of Environmental Conservation
Notice of Complete Application

Date:   11/22/2021



Application ID: 1-4722-04426/00007

Permits(s) Applied for: 1 - Article 19 Air Title V Facility 1 - Article 19 Title IV (Phase II Acid Rain)

Project is located:  in BROOKHAVEN in SUFFOLK COUNTY

Project Description:
The Department has prepared draft permits and made a tentative determination, subject to public comment or other information, to approve the application to renew the Title IV permit and renew and modify the Title V permit for the Caithness Long Island Energy Center. Notice of Complete Application had been previously provided on 5/2/2018, the USEPA provided comments on that draft Title V permit, and the permit was then redrafted to address those comments. There has been no physical modification to the facility, no emission sources were added or altered, and total annual emissions are still limited to the same amount as in the previous permit.

This facility is a 346 megawatt (MW), dual fuel, combined-cycle electric generating station which also has a prevention of significant deterioration (PSD) permit issued from the United States Environmental Protection Agency (EPA consisting of one Siemens Westinghouse Power Corporation 501F combustion turbine generator (CTG), a heat recovery steam generator equipped with natural gas-fired duct burners, and a single steam turbine.

The facility is subject to prevention of significant deterioration (PSD) requirements for the following pollutants: oxides of nitrogen (NOx), carbon monoxide (CO), and particulate matter (PM & PM10). The facility is no longer subject to PSD requirements for sulfur dioxide (SO2) and sulfuric acid mist (H2SO4) because current New York State sulfur-in-fuel limitations keep the facility's emissions of these contaminants below PSD thresholds and this is reflected in the USEPA permit revision of 2020. The facility is also subject to nonattainment new source review for NOx and volatile organic compounds (VOCs).
Notable changes to the Title V permit include the following 11 items:
1. sulfuric acid mist emission limits have been removed (PSD emission limits for SO2 were not included in the previous Title V permit);
2. references to the Clean Air Interstate Rule (CAIR) were removed and Cross-State Air Pollution Rule (CSAPR) citations were added;
3. conditions for Part 242, CO2 Budget Trading Program and Part 251, CO2 Performance Standards for Major Electric Generating Facilities were added;
4. reference to the previously disconnected  fuel gas heater have been removed;
5. based on the results of air quality modeling, operation of the auxiliary boiler while the combustion turbine operates is now authorized under additional scenarios;
6. a NOx RACT emission limit was added for the auxiliary boiler;
7. the duct burner time use limit has been converted to a maximum annual heat input limit;
8. to be consistent with the PSD permit, stack tests for the combustion turbine/duct burner and auxiliary boiler are now required every five years instead of once during term of the permit and stack tests for the emergency fire pump are no longer required unless requested by the Department;
9. startup conditions were simplified and limits are now dependent on the HP drum pressure only;
10. the steady-state emission limit conditions for CO and NOx were updated to clarify that these limits do not apply during startup and shutdown;
11. and fuel switching is now treated as oil firing with respect to emission limits of CO and NOx.

In accordance with 6NYCRR Parts 621.7(b)(9) and 201-6.3(c), the Administrator of the United States Environmental Protection Agency (USEPA) has the authority to bar issuance of any Title V Facility Permit if it is determined not to be in compliance with applicable requirements of the Clean Air Act or 6NYCRR Part 201.

Persons wishing to inspect the subject Title V files, including the application with all relevant supporting materials, the draft permit, and all other materials available to the DEC (the "permitting authority") that are relevant to this permitting decision should contact the DEC representative listed below. The Draft Permit and Permit Review Report may be viewed and printed from the Department web site at:   

DEC will evaluate the application and the comments received on it to determine whether to hold a public hearing. Comments and requests for a public hearing should be in writing and addressed to the Department representative listed below. A copy of the Department's permit hearing procedures is available upon request or on the Department web site at:

Availability of Application Documents:
Filed application documents, and Department draft permits where applicable, are available for inspection during normal business hours at the address of the contact person. To ensure timely service at the time of inspection, it is recommended that an appointment be made with the contact person.

State Environmental Quality Review (SEQR) Determination
Project is not subject to SEQR because it is a Type II action.

SEQR Lead Agency  None Designated

State Historic Preservation Act (SHPA) Determination
The proposed activity is not subject to review in accordance with SHPA. The application type is exempt and/or the project involves the continuation of an existing operational activity.

DEC Commissioner Policy 29, Environmental Justice and Permitting (CP-29)
It has been determined that the proposed action is not subject to CP-29.

Availability For Public Comment
Comments on this project must be submitted in writing to the Contact Person no later than 01/07/2022 or 30 days after the publication date of this notice, whichever is later.

Contact Person
SUNY @ Stony Brook|50 Circle Rd
Stony Brook, NY 11790-3409
(631) 444-0369