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FIRM OVERVIEW AND BACKGROUND <br /> . 4'(of , Hilo Wastewater Treatment Plant <br /> w . <br /> . _A.,._0114,.",—, Rehabilitation and Replacement Project <br /> AL <br /> . - COUNTY OF HAWAII,WASTEWATER DIVISION,HILO,HAWAII <br /> 1' Client Reference: <br /> '" -- , - - -- Mr.Jason lmamura,Plant Operations Supervisor, <br /> " ," 1, County of Hawaii <br /> ' lifer 808.937.5195 / Jason.Imamura@hawaiicounty.gov <br /> The Hilo Wastewater Treatment Plant(WWTP)currently serves Carollo was retained to provide planning,design,and construction <br /> portions of the Hilo community and was originally designed for an management services for all required improvements to the Hilo <br /> average and peak wastewater flow capacity of 5 mgd and 13 mgd, WWTP.The project will be constructed in phases. <br /> respectively.The last major construction at the plant was completed <br /> in 1994;since then,relatively minor improvements have been made Carollo is also supporting the County in planning for future <br /> to the facility. improvements.The County desires a more sustainable approach o <br /> to biosolids handling,including energy efficiency and energy Z <br /> Summary of Scope production.The County also may need to provide flexibility for more o <br /> stringent regulatory requirements.The existing secondary treatment = <br /> A recent condition assessment and master plan recommended a <br /> process is trickling filter/solids contact. D <br /> various capital improvements,including those listed below,to restore = <br /> the plant to its original condition,capacity,and service life: <br /> Specific tasks included: z <br /> • New,stand-alone headworks structure,including influent • Planning,design,and construction management services. c <br /> screening,grit removal,flow metering and sampling systems,and o <br /> ■ Complex construction sequencing. m <br /> improvements to receiving facilities for septage and sludge from <br /> other County treatment plants. • Energy efficient and sustainable biosolids handling improvements. -1 <br /> m <br /> z <br /> • Rehabilitation of primary sedimentation tanks. • Planning for flexibility in secondary treatment effluent quality. <br /> m <br /> • Rehabilitation and upgrade of the secondary treatment facilities. o <br /> m <br /> to <br /> • Replacement of existing anaerobic digesters. w <br /> O <br /> z <br /> • New sludge thickening and biosolids dewatering facility. D <br /> U) <br /> m <br /> • Plant-wide electrical improvements. < <br /> o <br /> • New SCADA system. w <br /> m <br /> N <br /> i: W <br /> A <br /> I � <br /> . O_ - .4-1'ateyt I <br /> O <br /> z <br /> • ,.wi,.'.:..., C. .a z <br /> .,anvrvs, .,�'�,�yp ..�- .• z <br /> r3 <br /> I I 1 l -_Vii K <br /> a D <br /> D <br /> s[t d o <br /> ^i <br /> O <br /> z <br /> CAROLLO / QUALIFICATIONS / JUNE 2023 4 <br /> B:\Pursuits\CIlent831HON)\HawaliCounty\EnvMgmtDept\On-Call FY23-24\Oua10623\PL.4 CmntyPing_Cmnty\Indd\01_FirmOvervlew_PL4 <br />