|
Fifth Amended Emergency Proclamation Relating to the Hilo Wastewater Treatment Plant
<br /> Page 2 of 4
<br /> WHEREAS, NPDES Permit No. HI0021377 authorizes the County of Hawaii to
<br /> discharge secondary treated wastewater through Outfall Serial No. 001 into the Pacific Ocean
<br /> through a diffuser located within Puhi Bay in the District of South Hilo; and
<br /> WHEREAS, the advanced age of the Plant combined with deferred maintenance, plant
<br /> location, and environmental conditions, have resulted in significant corrosion, deterioration, and
<br /> disrepair of the Plant and its associated infrastructure; and
<br /> WHEREAS, the Plant's associated infrastructure, including but not limited to sewer
<br /> pump stations, force mains, portable pumps, and the collection system, which contribute to the
<br /> conveyance of wastewater to the Plant, also have deficiencies; and
<br /> WHEREAS, should failure of this critical infrastructure occur, it would pose an imminent
<br /> risk of raw sewage spillage, endangering public health and safety; and
<br /> WHEREAS, an assessment of the Plant's condition was conducted in 2021, by consultant
<br /> McGovern McDonald Engineers, to develop a report on the Repair/Replacement plan for the
<br /> facility, which included a calculation of risks and risk rankings related to potential plant failure;
<br /> and
<br /> WHEREAS, this report concluded there was structural deterioration of the Plant,
<br /> extensive area-wide corrosion, loss of bearing wall integrity, significant mechanical defects
<br /> affecting the Plant, and that several systems and their components are beyond repair and require
<br /> immediate replacement; and
<br /> WHEREAS, the report concluded that the general state of the Plant is very poor to
<br /> failing, with reliability and standby capacity compromised; and
<br /> WHEREAS, in March 2024, the County of Hawaii entered into an Administrative Order
<br /> on Consent with the Environmental Protection Agency to repair or replace the Plant, which
<br /> included repair or replacement of all assets which are inoperable, corroded, deteriorated, and/or
<br /> at risk of failure, to include the headworks, primary treatment train, and biosolids handling; and
<br /> WHEREAS, on December 20, 2024, the County of Hawaii awarded the Contract for
<br /> Phase One of the Hilo Wastewater Rehabilitation and Replacement Project to Nan, Inc., which is
<br /> to be completed within five years from commencement of the repairs; and
<br /> WHEREAS, given the current state of the Plant, and the findings of McGovern
<br /> McDonald Engineers, there are concerns that the structures and components could fail
<br /> imminently, and before the necessary repairs can be made; and
<br /> WHEREAS, the deteriorated condition of the Plant is in a state of failure, meaning there
<br /> is imminent danger of an emergency impacting the County of Hawaii, were such failure to
<br /> occur, and raw sewage to be spilled into Puhi Bay and surrounding areas whereby water currents
<br /> may allow raw sewage to be further disseminated with very limited mitigation options; and
<br /> WHEREAS, the current condition of the Plant poses substantial endangerment to public
<br /> health and safety, and warrants preemptive and protective action in order to provide for the
<br />
|