Village of Wellington – WTP Overview and Master Planning for PFAS Treatment

Village of Wellington – WTP Overview and Master Planning for PFAS Treatment Anjuli Panse, P.E., Karla Berroteran, Nick Black, P.E., Thursday March 7, 2024 2:30-3:00 pm Agenda Village of Wellington Utility Water Treatment Plant PFAS Contamination Membrane Master Plan Full-Scale Pilot Test Work completed Next Steps A Great Hometown “Best Cities to Live in Florida” ChamberofCommerce.org “Florida’s Safest Cities” Safewise.com “Top Places to Live in the U.S.” “ Best Places to Retire in the U.S.” Money Magazine Water System 12. MGD Rated Capacity Three Wellfields Surficial Aquifer Three Treatment Systems Membrane Softening Lime Softening Buildout capacity 13. MGD Wellfield North “RO” 9 wells East RO & Lime 2 wells South (Lime) Lime 7 wells Water Treatment Plant Lime Softening Membrane Plant Membrane Plant 2 4. MGD MGD 3. MGD 1 2 3 PFAS Manufactured chemicals Consumer products – non-stick items Firefighting foam (PFOS) Chain of linked carbon and fluorine atoms Strong bond, persistent Test Methods 533 & 537. Potential adverse health affects: Cancer Weight/cholesterol Immune system Developmental Reproductive PFAS Regulatory Timeline 2012-2016: UCMR3 included PFAS constituents (x6) 2016 Health Advisory established at 70 ppt 2019 EPA PFAS Action Plan 2022: Lifetime HAL 2023: Draft MCL PFOS, PFOA, HI Will become law ~ April ‘24 3-year compliance period VOW WTP Site R3R Lime R1 PBCFR Station Membrane Plant Membrane R2 Plant 2 Transitioning to 100% Membranes Benefits: PFAS removal Removal of other DBP precursors, CECs Challenges: Stabilization Configuration of WTPs Adaptability to future regulations Concentrate treatment? 2017 WTP Renewal & Replacement Replacement of NF trains in M1 Demolition of Train Upsizing Trains 2-5 from 0. MGD to MGD Construction of Train 7 – 1. MGD Various plant process improvements Kept 4. MGD Lime Softening Membrane performance challenges Membrane Swapout PFAS & Alkalinity Rejection Piloting T2: 18x9x6M T7: 36x16x6M Old All NF90-400-34i New Hybrid load Two lead NF270-400 HPP8 & Degas 4 3. MGD post-treatment 2-stage odor control High Pressure Pump (HPP) Pretreatment micron filter Train 8 & Membrane Shuffling M1 Trains 18x9x6M Lead NF90s relocated Train 6 36x16x6M Lead NF90s relocated Train Train 8 36x16x6M array Lead 2 elements NF270 Reused NF90s from other trains Rest new NF270s and NF90s Train 8 & Membrane Shuffling 1. MGD treatment Buildout capacity 2. MGD 4-inch multi-ports Permeate piping improvements Mix of old & new membranes ~15 psi reduction in feed pressures.