Lake Shirley Improvement Corporation Informational Session

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