REQUEST FOR PUBLIC COMMENTS
ON DRAFT AIR PERMIT
REGULATING THE EMISSIONS OF AIR POLLUTANTS
(Docket No. 25-CA-PA-04)
Pursuant to Hawaii Revised Statutes (HRS), Chapter 342B-13 and Hawaii Administrative Rules (HAR), Chapter 11-60.1, the Department of Health, State of Hawaii (DOH), is requesting public comments on the following DRAFT PERMIT presently under review for:
Covered Source Permit (CSP) No. 0239-01-C
Application No. 0239-05 for Renewal
Application No. 0239-07 for Significant Modification
Hawaiian Electric Company, Inc.
Waiau Generating Station
Located At: 475 Kamehameha Highway, Pearl City, Island of Oahu
The DRAFT PERMIT is described as follows:
The renewal of CSP No. 0239-01-C would grant conditional approval for the continued operation of the existing electrical power generating station which consists of the following:
1. Six (6) existing boilers W3 through W8; and
2 Two (2) existing combustion turbine generators W9 and W10.
For the significant modification, the applicant is requesting to permanently shutdown and remove from service the existing boilers W3 through W8 and replace them with six (6) new simple cycle combustion turbine generators W11 through W16 (44.8 MW, 397 MMBtu/hr each). The new combustion turbine generators will provide more efficient, cleaner, and reliable generation to support Hawaiian Electric’s island wide electrical grid. The replacement of units W3 through W8 with units W11 through W16 would be staggered such that two units are replaced at a time.
The facility is subject to the following Federal Requirements:
40 Code of Federal Regulations (CFR) Part 60 – Standards of Performance for New Stationary Sources (NSPS)
Subpart A: General Provisions
Subpart KKKK: Standards of Performance for Stationary Combustion Turbines (applies to the new combustion turbine generators W11 through W16)
Subpart TTTTa Standards of Performance for Greenhouse Gas Emissions for Modified Coal-fired Steam Electric Generating Units and New Construction and Reconstruction Stationary Combustion Turbine Electric Generating Units (applies to the new combustion turbine generators W11 through W16)
40 CFR Part 63 – National Emission Standards for Hazardous Air Pollutants for Source Categories (MACT)
Subpart A: General Provisions
Subpart UUUUU: National Emission Standards for Hazardous Air Pollutants: Coal – and Oil-Fired Electric Utility Steam Generating Units (applies to the existing boilers W3 through W8)
40 CFR Part 98 – Mandatory Greenhouse Gas Reporting
The total potential emissions from the Waiau Generating Station, based on only W9 through W16 operating, are as follows:
Pollutant Emissions (tpy)
NOx 13,226.3
CO 753.8
SO2 3,108
PM 858.7
PM10 858.7
PM2.5 858.7
VOC 257.1
HAPS 17.45
CO2e 1,544,813
The ADMINISTRATIVE RECORD, consisting of the APPLICATION and non-confidential supporting materials from the applicant, the permit review summary, and the DRAFT PERMIT, is available online at: http://health.hawaii.gov/cab/public-notices/ and for public inspection during regular office hours, Monday through Friday, 7:45 a.m. to 4:15 p.m., at the following location:
State of Hawaii
Clean Air Branch
2827 Waimano Home Road #130
Pearl City, Hawaii 96782
All comments on the draft permit and any request for a public hearing must be in writing, addressed to the Clean Air Branch at the above address on Oahu and must be postmarked or received by April 22, 2025.
Any person may request a public hearing by submitting a written request that explains the party’s interest and the reasons why a hearing is warranted. The DOH may hold a public hearing if a hearing would aid in DOH’s decision. If a public hearing is warranted, a public notice for the hearing will be published at least thirty days in advance of the hearing.
Interested persons may obtain copies of the administrative record or parts thereof by paying five (5) cents per page copying costs. Please send written requests to the CIean Air Branch listed above or call Mr. Darin Lum at the Clean Air Branch at (808) 586-4200.
Comments on the draft permit should address, but need not be limited to, the permit conditions and the facility’s compliance with federal and state air pollution laws, including: (1) the National and State Ambient Air Quality Standards; and (2) HRS, Chapter 342B and HAR, Chapter 11-60.1.
DOH will make a final decision on the permit after considering all comments and will send notice of the final decision to each person who has submitted comments or requested such notice.
Kenneth S. Fink, MD, MGA, MPH
Director of Health
(SA1487768 3/24/25)
