2020-09-23 EMC Meeting Agenda and Director's Informational Report

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• The county is working on land transfer from West Hawaiʻi Business Park (WHBP) for the SPS site. WHBP received Final subdivision approval in August 2020. F. FACILITY REPAIR/EQUIPMENT REPLACEMENT PROJECTS: • Pua Sewage Pump Station (SPS) Upgrade: Design items for additional upgrades needed besides pump replacement at the Pua SPS are being worked into a new contract. It will include a complete renovation, including structural, electrical, and mechanical upgrades to the pump station. Cause for renovation is due to deterioration of the wet well from HS; electrical component damage due to HS 22 corrosion and the overall age of the facility; and mechanical damage due to faulty discharge line valves due to hydraulic surging. Work is to include upgrading the HVAC; replacing/upgrading components of the electrical system; replacing corroded duct work; upgrading the wet well level control system; and improving on safety issues by eliminating fire and electrical hazards to achieve compliance with NFPA 820 and 70E. DEM is now preparing a Preliminary Engineering Report so the project can qualify for a CWSRF loan to support design and construction. • Pua Force Main (dual FM): DEM is applying for a CWSRF loan for the design effort. CWSRF has placed loan application on hold pending submittal of a Preliminary Engineering Report (PER). County will be attempting to prepare a PER with excerpts from the initial 1990 design. CWSRF has initially approved PER and is preparing commitment letter for funding design. • Lanihau SPS Force Main Replacement: Project will replace approximately 800 lineal feet of pipe form the Lanihau SPS and connect to the manhole at the Palani Road and Kuakini Street intersection. Construction team mobilized on 08/17/20 with completion date projected by late September 2020. • Repair/Replace Hilo, Kulāʻimano, and Pāpa’ikou WWTP Programmatic Plans: All three WWTPs are nearing the end of their useful life along with being located in corrosive atmospheres, expediting the aging process. Kulāʻimano WWTP is nearing 45 years, Pāpaʽikou is nearing 37 years, and Hilo is nearing 30 years. The work will first conduct a condition assessment to develop a repair and replacement/upgrade (R&R) 20-year cost projection of what unit processes or major equipment should be repaired, replaced or upgraded. Included in this condition assessment phase is a process optimization evaluation to identify the strategies that can be incorporated into the design to reduce operating costs, improve process control, and increase digestion volatile solids reduction. Inherent to this optimization effort will be to review flows and loads projections and process modeling. The three major planning directions the county desires to evaluate are: 1. Whether the county should repair the existing WWTP; 2. Replace the entire WWTP with a new WWTP; or 3. Replace the existing process with a similar one on the existing WWTP site. WWD is awaiting NTP of contract. 14