Lake Shirley

1
Lunenburg Comprehensive Wastewater Management Plan
Lake Shirley Improvement Corporation Informationa
l 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

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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

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On-Site Title 5 Systems

• Conventional System

• I/A System

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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

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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

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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

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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

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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

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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

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Phase III Report

• Refinement of Needs Areas
• Impact Analysis
• Cost Analysis
• Environmental
• Assessment of Management Techniques
• Recommended Wastewater Management Plan
• Impacts
• Costs
• Implementation Plan

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Impact Analysis

• Cost Analysis
• Construction Costs (Capital)
• Based on similar projects, and vendor pricing
• OM 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

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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

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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

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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

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Selection Methodology

• Environmental and economic factors
• Weighted factors
• Ranked alternatives
• Rankings multiplied by weightings
• Weighted rankings were summed

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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

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CWMP Completion Timeline

• 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

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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/
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Questions Answers