2019-03-27 Meeting Minutes (EMC)

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development), and how each user would be using the water. He spoke about pipelines and connections, one of which will allow recycled water to be delivered up to the Kohanaiki Golf and Ocean Club, which has asked the county to increase its allocation to 1 million gallons per day. In addition, the Department of Water Supply has an unused 1 million gallon storage tank on Hina Lani Street, and the intention is to transfer it to DEM and repurpose it for recycled water use. The delivery system at the treatment plant will pump water to the Hina Lani tank, which will provide storage and some pressure to the Kohanaiki Golf and Ocean Club development. Brown & Caldwell is trying to develop a backbone system for recycled water that the county can expand in the future as the area develops. With more development, more wastewater will be generated, which means the county can produce more recycled water that can be used for irrigation. It will mean a drought-free water supply for irrigation. Mr. Lekven spoke about the future development users, including the Kealakehe Regional Park, several QLT developments, and the Lanihau development. These developments intend to use recycled water for irrigation purposes, parks, open space, streetscapes, multi-family housing landscaping, and similar uses. The R-1 system is a backbone system, and there will be opportunities to expand it in the future if the county wants to. Brown & Caldwell is anticipating that basically all of the effluent, 5.3 mgd, will be used. The commissioners had several questions, and below is some of the information Mr. Lekven provided: • It will be an ultraviolet disinfection system and will meet the state’s R-1 recycled water standards. • The piping is currently in the highway and was sized with R-1 water in mind. For the storage tank, they will need to run a line to it, which will either be in the road or the shoulder of the road. • The pipeline from Kealakehe Parkway to the WWTP is estimated to be completed in 2023. Design has not yet started, and it is intended to run in the state right-of-way parallel to the highway, in the shoulder. DOT approval needs to be obtained. • Getting effluent from the harbor to the Kealakehe WWTP is a separate project, and they are in the preliminary design stage of the pump station for that. The state installed force mains for the project, so the highway will not need to be dug up. The project will have its own EA, and the timeline is about 2023. • When the SAT system is up and running, they will close the existing disposal system. The existing sump is about a quarter acre, and the new system will be about 10 acres. The water is spread out over a large area, 7