NOTICE OF PROPOSED WATER POLLUTION CONTROL PERMIT
FOR WAIAHI SURFACE WATER TREATMENT PLANT
LIHUE, ISLAND OF KAUAI NPDES PERMIT NO. HI 0021894
DOCKET NO. HI 0021894
October 30, 2020
The State Department of Health (DOH) tentatively proposes to issue a National Pollutant Discharge Elimination System (NPDES) permit to discharge drinking water residual from the Waiahi Surface Water Treatment Plant,
to receiving State waters, subject to special conditions to:
WAIAHI WATER COMPANY LLC
The proposed NPDES permit for the existing discharge will expire five (5) years from the date of issuance.
The Waiahi Water Company LLC operates the Waiahi Surface Water Treatment Plant located off Maalo Road, Lihue, Island of Kauai, Hawaii. The facility produces approximately 2.3 MGD of drinking water (3.0 MGD maximum capacity) for over 15,000 residents and visitors, or roughly 20% of the island population. Raw water is pumped from the Kapaia Reservoir to the facility for treatment prior to entering the water distribution system. Drinking water residual from the treatment process is directed to an onsite detention basin which overflows back into Kapaia Reservoir.
Kapaia Reservoir, is classified by the DOH as a Class 2, Inland Waters under HAR §11-54-5.2. It is the objective of Class 2 waters to protect their use for recreational purposes, propagation of fish and aquatic life, and agricultural and industrial water supplies, shipping, navigation and propagation of shellfish .
Persons wishing to comment upon or object to the draft modified NPDES permit or to request a public hearing, should submit their comments or requests in writing no later than 30 calendar days after the date of this notice, either through e-mail at: cleanwaterbranch@doh.hawaii.gov or by mail at 2827 Waimano Home Road, Room 225, Pearl City, Hawaii 96782 .
Copies of the draft modified permit and other information are available for public inspection, Monday through Friday (excluding holidays) from 7:45 a.m. until 4:15 p.m., at the DOH Clean Water Branch (CWB) office located at the 2827 Waimano Home Road 225, Pearl City, Hawaii 96782 , or at the Kauai DistrictHealth Office located at 3040 Umi Street, Lihue, Hawaii 96766. Copies may be bought. The public notice permit and fact sheet are also available on the internet at:
https://health.hawaii.gov/cwb/clean-water-branch-home-page/public-notices-andupdates/. For more information or if you require aid in inspecting and/or commenting on the public notice permit and related information, please contact Mr. Darryl Lum, Supervisor of the Engineering Section, CWB, at the above address or (808) 586-4309 (Voice) at least seven (7) calendar days before the comment deadline. For those who use a TTYfTDD, please call through Sprint Relay Hawaii, at 1-711 or 1-877-447-5991 .
All written comments and requests received on time will be considered. If DOH determines that there is significant public interest, a public hearing may be held after at least 30 calendar days of public notice.
If DOH’s position is substantially unchanged after considering all timely written comments and all oral comments at any public hearing that may be held, then the DOH will issue the NPDES permit and this action will be final.
Please notify anyone you know who would be interested in this matter.
ELIZABETH A. CHAR, M.D.
Director of Health
(TGI1301123 10/30/20)
