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Lunenburg Wastewater Management Plan for Lake Shirley Improvement

Learn about the comprehensive wastewater management plan for Lake Shirley in Lunenburg presented by the project team. The plan includes phases from existing conditions assessment to recommended management techniques and alternatives analysis.

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Lunenburg Wastewater Management Plan for Lake Shirley Improvement

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Presentation Transcript

  1. Lunenburg Comprehensive Wastewater Management Plan Lake Shirley Improvement Corporation Informational Session Kevin Olson, PE - Project Manager Abby Charest, PE - Lead Project Engineer Jason Jancaitis, PE - Project Engineer

  2. CWMP Phases • Project Management/Public Involvement • Phase I - Existing Conditions • Phase II - Alternatives Identification and Screening • Phase III - Detailed Evaluation of Alternatives and Recommended Plan • Phase IV – Report

  3. Communication, Coordination and Consensus

  4. Phase I CWMP • Existing conditions • Water demand/supply sources • Water balance • Wastewater needs assessment • Areas that are not well suited for onsite systems • Report and public meeting

  5. Needs Assessment Five Categories of Need • Avoid public health problems • Water supply protection • Protect surface waters • Preserve community character • Support managed growth

  6. Phase I Report • Town-wide Approach • Study Areas – 24 Areas • Tier 1 • Data based approach • Ranking formula • Utilizes a “layered” approach • 12 Layers • Utilizes numerous data sources • Tier 2 • Qualitative approach • BOH Records • Land Board Analysis • Phase I Results - 11 Needs Areas • 9 Study Areas • 2 Growth Management Districts • Areas with Need for Further Study

  7. Lake Shirley • Study Area 19 • Lot size – small • High Density • Soil Drainage • fast perc rates • High Groundwater • Proximity to Surface Water

  8. Phase II Report • Management Techniques • Water Conservation • Septage Management Plans • Sewer District Management Plans • Title 5 On-site Systems • Conventional • I/A Systems • Decentralized Systems • Shared Systems • Small WWTFs • Centralized and Regional Treatment • Leominster • Fitchburg • Shirley/Devens

  9. On-Site Title 5 Systems • Conventional System • I/A System

  10. Decentralized Treatment Systems • Defined service area, GWD permit Village at Flat Hill

  11. Decentralized Treatment Systems • Defined service area, GWD permit Woodlands Village

  12. Centralized/Regional Treatment • Traditional municipal facility Leominster WWTF

  13. Alternatives Analysis • Each Area Assessed • Technical • Environmental • Institutional • Economic

  14. Alternatives Analysis – Lake Shirley • Most Well Suited • I/A Systems • Decentralized Systems • Regional Treatment to Shirley/Devens WWTF • Least Well Suited • Conventional Title 5 Systems • Regional Treatment to Leominster • Centralized Treatment within Lunenburg

  15. Lake Shirley – Short Listed Alternatives • I/A Systems • SMP – Septage Management Plan • Required Maintenance • Needs Area defined in the Septage Management Plan • Define the number of bedrooms per sq.ft. of individual parcel • Chatham, MA • 6 ft groundwater separation, and 100 ft from surface water • Acton, MA • I/A systems used as replacements for failed systems or systems requiring a variance

  16. Lake Shirley – Short Listed Alternatives • Decentralized System • Package Wastewater Treatment Facility • Low Pressure Sewers • Sewer District • Pepperell, MA • Essex, MA • Chapter 83 Amendment • Allows Town to define the service area • Limit construction • Impacts • Costs • Limit Connections - Based on existing number of bedrooms or proximity to surface water • Moratorium on additional connections

  17. Lake Shirley – Short Listed Alternatives • Decentralized System • Potential Treatment and Disposal Sites • Townwide Search • 23 Potential Sites • Preformed Preliminary Hydrogeological Evaluation • Soils • Depth to Bedrock • Effluent Disposal Rates • Short Listed by Sub-basin

  18. Lake Shirley – Short Listed Alternatives • Regional Treatment –Shirley/Devens WWTF • Treatment at the Devens WWTF • Low Pressure Sewers • Sewer District • Limit Connections • Limited capacity • Pumps, pipes, facility

  19. Phase III Report • Refinement of Needs Areas • Impact Analysis • Cost Analysis • Environmental • Assessment of Management Techniques • Recommended Wastewater Management Plan • Impacts • Costs • Implementation Plan

  20. Impact Analysis • Cost Analysis • Construction Costs (Capital) • Based on similar projects, and vendor pricing • O&M Costs • A total of the annual costs - 20 year planning period • Unit Costs • Cost per parcel • Environmental Analysis • CWMP Guidelines • EOEA permit requirements • Town of Lunenburg

  21. Environmental Analysis • Treatment and Effluent Quality • Drinking Water • Water Balance • Wetlands, Flood Plain, and Agricultural • Endangered and Protected Species • Septage Disposal • Odors, Air Quality and Noise • Open Space, Recreation, and Surface Water • Growth and Development • Aesthetic

  22. Water Balance • Based on the 2000 NRWA model • Balances for 2006 & 2026 • 2026 – Phase I Report • Based on estimated changes due to existing infrastructure • 2026 – Phase III Report • Based on estimated changes due to recommended plan

  23. Water Balance • Drinking Water Withdrawn • District Wells • Drinking Water Distributed • Throughout District • Wastewater Collected • Sewers • Wastewater Discharged • WWTFS • Leominster • Fitchburg • Currently – Low Stressed Basin • Potential for Medium Stressed Basin

  24. Selection Methodology • Environmental and economic factors • Weighted factors • Ranked alternatives • Rankings multiplied by weightings • Weighted rankings were summed

  25. Decision Matrix • Decision matrix incorporates weighted rankings for each study area • Lowest ranking - Most well suited • Highest ranking - Least well suited • Each Area - Viable alternative with lowest ranking • Selected for the recommended plan

  26. Draft Report to Town Next Workshop File Report with MEPA Formal Comment Period Public Meeting - End of January - Early February - End of February - March - March CWMP Completion Timeline

  27. Reports and Comments • Information Depositories: • Selectmen's Office • 17 Main St.      • Town Hall • Lunenburg, MA 01462 • DPW • 520 Chase Rd. • Rt. 13  • Lunenburg, MA 01462 • Public Library • Ritter Memorial Library • 1023 Massachusetts Ave • Lunenburg, MA • Submit Comments to: • Sewer Commission, Chair • Town Hall 17 Main Street Lunenburg, MA 01462 http://lunenburg-cwmp.wright-pierce.com/

  28. Questions & Answers

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