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FOR IMMEDIATE RELEASE 
September 24, 2003

 

ELECTRICAL POWER INTERRUPTION CAUSES ‘DISINFECTION BYPASS’ INTO LAKE WILSON

          Electrical power interruptions triggered by an ongoing brushfire in Waialua disrupted the Wahiawa Wastewater Treatment Plant today (September 24), causing a discharge into Lake Wilson of 8,842 gallons of effluent that had undergone tertiary treatment, but not the final ultraviolet (UV) disinfection.  (Tertiary treatment is a high level of wastewater treatment.)

          The power outage began at approximately 11:48 a.m., knocking the UV equipment off-line for 10 minutes.  The system re-set itself and resumed normal functions once power was stabilized. 

          Warning signs have been posted, samples are being taken, and the State Department of Health has been notified.  Since the discharged effluent was processed up to the level of disinfection, State Health officials consider the discharge a “disinfection bypass” and not a sewage spill. 

 

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Wednesday, September 24, 2003

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