2024-06-28 PL-INT-2024-008098 Brown and Caldwell Category PL.5

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County of Hawaii,Planning Department Section E PL.5)Community Planning(Environmental Planning,Environmental Assessments,Environmental Impact Statements) Fiscal Year 2024-2025 d. (1)TITLE AND LOCATION(City and State) (2)YEAR COMPLETED Engineering Services to Design a Wastewater Treatment Collection PROFESSIONAL SERVICES CONSTRUCTION(ifapplicable) and Disposal System for the Pahala Wastewater Treatment Plant and 2024 N/A Post-Design, Pahala, Hawaii (3)BRIEF DESCRIPTION(Brief scope,size,cost,etc.)AND SPECIFIC ROLE❑x Check if project performed with current firm Program Manager. BC is providing engineering services for the closure of large capacity cesspools and construction of new wastewater infrastructure in Pahala,to meet updated effluent discharge requirements dictated by the USEPA. BC completed the planning phase,which included a preliminary engineering report,environmental assessment, regulatory and permit identification,site alternatives evaluation and land acquisition, community outreach, and conceptual alternatives for the design,construction, and commissioning of the system.While the infrastructure was originally designed around a natural treatment system to minimize environmental impacts,simplify maintenance requirements,and achieve reliability,alternative treatment technologies are being evaluated to address additional constraints related to affordability and unique geology of the area. Total Contract Amount: $4.3M Client:County of Hawaii, Dept.of Environmental Management e. (1)TITLE AND LOCATION(City and State) (2)YEAR COMPLETED Honokaa Wastewater Treatment Plant Upgrade Project, PROFESSIONAL SERVICES CONSTRUCTION(ifapplicable) Honokaa, Hawaii 2015 2012 (3)BRIEF DESCRIPTION(Brief scope,size,cost,etc.)AND SPECIFIC ROLE❑x Check if project performed with current firm Project Manager. BC designed upgrades to the Honokaa Wastewater Treatment Plant, located on Hawaii Island,to accommodate increased flows that will result from the abandonment of large capacity cesspools in the community. The existing wastewater treatment plant consisted of two facultative ponds with three injection wells for effluent disposal.The design included modification to three existing injection wells and construction of three additional injection wells to provide the necessary disposal capacity.The upgrade project increases the facility capacity from 56,800-gallons per day to 200,000-gallons per day by converting the system to a partial mix aerated lagoon treatment process. Total Contract Amount: $1.2M Client: County of Hawaii, Dept.of Environmental Management IBrown AND Caldwell STANDARD FORM 330(REV.7/2021) : 12