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January 2, 2004


(Updated 8:30 p.m.)

            Heavy rains were disrupting Oahu’s wastewater system today (Friday, January 2), causing treated and raw sewage to overflow at the Waimanalo Wastewater Treatment Plant and untreated wastewater to back up from manhole covers in various parts of the island.

            Unusually high and intense storm water inflow from heavy rainfall overloaded injection wells at the Waimanalo Wastewater Treatment Plant (located at 41-1060 Kalanianaole Highway) at 1:30 p.m., causing an undetermined amount of raw and treated wastewater to overflow onto the facility grounds and eventually into a drainage ditch that discharges into Puha Stream.  The treated effluent had been processed at a high (“secondary”) level, which uses sand filtration and sodium hypochlorite for disinfection.

            The Waimanalo incident is continuing because of the ongoing rains, and an estimate of the spill will be released at a later date.

            At 11:30 a.m., an earlier spill was reported in Nuuanu at 4265 Kekau Place, where a manhole was overflowing into Waolani Stream, which feeds into Nuuanu Stream.  A City crew responded shortly after noon and the spill ended at 1:30 p.m.  The spill was estimated at 3,600 gallons.

            Overflowing manholes were also reported in Kalihi at 1723 Lehua Street and 1738 Palanene Place.  The spills, which were reported at 12:30 p.m. and were continuing as of this report, were entering Kalihi Stream. 

             The State Department of Health was notified of all incidents.  Warning signs have been, or will be posted along affected areas, which will also be sampled for contamination levels.







Tuesday, January 06, 2004

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