Loading...
HomeMy WebLinkAboutPresentation to Madaket Residents Association_July 13 2016NANTUCKET WASTEWATER PLAN UPDATE 4 Fairgrounds Wednesday, July 13, 2016 Madaket Residents Association •Current Status of Overall Wastewater Planning –Comprehensive Wastewater Management Plan (CWMP) Update –Surfside WWTF Improvements Project –Sewer Extension Implementation Plan •2016ATMApproved –Nantucket Harbor Shimmo –PLUS •2016 Fall STM – Proposed –Madaket/Warrens Landing & Somerset –Estimated Project Costs –Fall Special Town MeetingArticles –NoActionAlternative Agenda 1 ComprehensiveWastewaterManagementPlan Update •Incorporates Massachusetts Estuaries Program Results IntoRecommended Plan –Nitrogen Reduction to Meet Total Maximum Daily Loads(TMDLs) •Ranks “Areas of Need” •Septage Management Solutions –Board of Health Local Regulations •Full Use of Surfside WWTF Permit - Flows –Madaket WWTF Eliminated •20-Year Planning Document 2 Structured Nitrogen Reducing Solutions •Address all NeedsAreas With a Plan Defined as a Structured,Iterative Process andAdaptAs Necessary –Sewer Expansion •Aim to Reduce Nutrient Loading Over Time – Water QualityMonitoring Program –Start With Plans That Give the Town the Biggest Bang for its Buck •Add or Reduce Solutions as Needed to Meet EstablishedThresholds –Hummock Pond Breach – Jetties Reconstruction –Sesachacha Pond Breach AdaptiveManagementPlantoMeetNitrogen Reductions 3 Non-Structured Nitrogen Reducing Solutions •Septage Management Plan –Pumping Incentive –Innovative/Alternative Systems •Fertilizer Management –Education and Enforcement of Local Regulations •Stormwater Management –Island-wide AdaptiveManagementPlantoMeetNitrogen Reductions 4 NitrogenPollutionFromLandUses 5 SepticSystemsandNitrogenPollutionImpacts ALGAE BLOOMS DYING EEL GRASS WEED GROWTH 6 ComprehensiveWastewaterManagementPlan UpdateFinalRecommendedPlan 7 SurfsideWWTFImprovementsProjectUpdate •MassDEPApproved Expansion Up to 4.0 MGD –SupportsAll NeedsAreas From CWMP Update –NoAdditional Discharge Beds Needed –Groundwater Discharge Permit – Monitors Water Quality Testing atTMDLLocations •MassDEPApproved State Revolving Fund (SRF) Loan atZero Percent Interest – 20 Years •Highest and Best Use of Surfside WWTF –Madaket WWTF Eliminated •Final Improvements Project Out to Bid Summer 2016 8 April2,2016ATMSewerImplementationPlan Design&Constructionof “NantucketHarborShimmo”and“PLUS” •Two-Phase Sewer DesignApproved –Phase 1 - Nantucket Harbor Shimmo (Formerly Called Monomoy) –Phase 2 - PLUS (LargerNeighborhoodIn-fillAreas WithinorAdjacenttotheExistingTownSewerDistrict 9 2016TownMeetingSewerLocations 10 Approved ATM Proposed STM October17,2016 STMSewerImplementationPlan Design&Constructionof “Somerset”,“Madaket/WarrensLanding” •Two-Phase Sewer DesignApproved –Phase 1 - Somerset –Phase 2 - Madaket / Warrens Landing 11 Phase1-Somerset 12 Phase2–Madaket/WarrensLanding 13 WhytheNeedtoSewer–NaturalResources Department Natural Resources Department •Annual Water Quality Sampling Program •Water Quality Issues –Nitrogen Impact to Water Quality •Total Maximum Daily Load •Surfside WWTF Groundwater Discharge Permit –Monitoring TMDLThrough Sampling 14 WhytheNeedtoSewer–BoardofHealth •Inspection Results –574 Total Septic Systems (69 Innovative /Alternative) •422 Passed •111 Failed –85 Technical –26 Hydraulic 15 WhytheNeedtoSewer–BoardofHealth •Severe Soils –Soils Percolate at Less than 5 Minutes Per Inch •Too Fast – No Nitrogen Reduction in Bio-Mat (If a Bio Mat Can Even Form) •Inadequately Cleansed Wastewater Enters the Groundwater - Pollution •Severe Groundwater –Extremely Shallow in MadaketArea •On-Site systems Do Not Meet Regulatory Mandate for Separation From GW •Records of 1.5 Feet of Separation inArea – Regulatory Standard is 6 Feet •Alternatives –Sewer – RemoveAll On-site Systems from Watershed –I/ASystems Do Not Remove Enough Nutrients to Meet TMDL –Tight Tanks – Last Resort Technology Governed by Title 5 – 315 CMR 15.00 •NeedApproval From MassDEP •Logistically, technically and economically Not Feasible 16 Phase1–SomersetSoils 17 Phase1–SomersetSoilsConditions 18 Phase2-Madaket/WarrensLandingSoils 19 Phase2-Madaket/WarrensLandingSoil Conditions 20 Madaket/WarrensLandingLandSearch 21 22 Vacant Parcels 1 Acres + 19 – Under Conservation 3 – Town Owned All have severe constraints for groundwater discharge. Madaket/WarrensLandingLandSearch 22 22 Vacant Parcels 1 Acres + 19 – Under Conservation 3 – Town Owned All have severe constraints for groundwater discharge. OverallEstimatedProjectCosts–Finance Department Phase 1 – 2017 Cost Estimate Somerset –Design - $ 1,753,430. –Construction - $15,780,867. TOTAL $17,534,297. Phase 2 – 2019 Cost Estimate Madaket / Warrens Landing –Design - $ 6,109,648. –Construction – $54,986,828. TOTAL $61,096,475. 23 EstimatedProjectCoststoTaxpayers–Finance Department 24 UsingAverageAssessed Property Values, the following are theEstimatedAnnual Cost Impacts to the Taxpayers for EachProject: •AverageAssessment of $1,784,378 –Somerset - $53.50 –Madaket / Warrens Landing - $186.40 •AverageAssessed Value of $1,144,544 Year Round Residential –Somerset - $34.31 –Madaket / Warrens Landing - $119.56 2016FallSpecialTownMeeting–Town Administration •Two WarrantArticles: –“Somerset” and “Madaket / Warrens Landing” •Adding NeedsAreas Parcels to Town Sewer District •Approve Design and Construction •2016 STM Follow Up –Ballot Questions to Follow 25 WhatIfWeChooseToDoNothing? The Town has been issued TMDLs (a regulatory term in the U.S. Clean Water Act, describing a value of the maximum amount of a pollutant that a body of water can receive while still meeting water quality standards for the subject estuaries)in Nantucket, Polpis and Madaket Harbors, as well as Sesachacha Pond and has an order pending in Hummock Pond. If the Town chooses NOT to do anything, EPA with MassDEP has the authority to issue orders with fines to mandate restoration of the Town’s waters under its own terms and conditions. 26 AndwhatWouldDoingNothingCostUs? –We Will Lose SRF Funding –Increased Construction Costs –We Will Lose the Local Control of the Projects –Administrative Consent Order Determines: •When to Do the Project •How to Do the Project •How to Pay For the Project 27 Wastewater Plan Update QUESTIONS & ANSWERS Wastewater Plan Update BACK-UP SLIDES Phase1SewerLocation Phase2SewerLocation Funding&Financing:CapitalRecoveryPlan •SRF Loan at Zero Percent Interest –Paid Over 30 Years –Costs Savings •$44.6M Over Life of Loan ContributingAreastoWaters NantucketHarborTMDLLocations MadaketHarborTMDLLocation Excerpt from Nantucket Harbor TMDL from MassDEP: