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University of Massachusetts Dartmouth
<br /> School of Marine Science and Technology
<br /> Coastal Systems Group
<br /> 706 South Rodney French Blvd, r'
<br /> New Bedford,MA 02744-1221
<br /> ************************Technical Memorandum******** * *******£********
<br /> To: Tom Fudala,Chair,Mashpee Sewer Commission
<br /> From:Brian Howes,Director Coastal Systems Program
<br /> Ed Eichner,Coastal Systems Program
<br /> Roland Samimy,Coastal Systems Program
<br /> Sean Kelley,Applied Coastal Research&Engineering,Inc.
<br /> RE: Scenarios Results for Popponesset Bay and Waquoit Bay based on MEP Linked
<br /> Models
<br /> Date: November 15,2012(revised)
<br /> This Technical Memorandum details the results of Scenario Runs completed for the Mashpee Sewer
<br /> Commission using the Massachusetts Estuaries Project(MEP)Linked Watershed-Embayment Models
<br /> developed for Popponesset Bay and Waquoit Bay estuary systems(Figure 1). Development of the MEP
<br /> models and establishment of the nitrogen threshold for these systems are described in the respective
<br /> MassDEP(SMAST MEP Nitrogen Threshold Reports.L' These MEP reports indicate that both estuary
<br /> systems are showing impaired habitat quality resulting from nitrogen enrichment. The Massachusetts
<br /> Department of Environmental Protection(MassDEP)has formally acknowledged these assessments and
<br /> has obtained nitrogen Total Maximum Daily Loads(TMDLs)from USEPA for both Popponesset Bay
<br /> and Eastern Waquoit Bay.
<br /> The Scenarios Runs in this memorandum are the latest round of scenarios completed for the Town of
<br /> Mashpee,the most of recent of which was six scenarios,involving I I model runs between the two estuary
<br /> systems, completed in 2009 that explored various wastewater treatment and discharge location
<br /> alternatives.s The scenarios in this current Technical Memorandum are refinements of the 2009
<br /> scenarios with updated wastewater collection,treatment,and discharge options.
<br /> Howes,B.,Kelley,S.,Ramsey,J.,Samimy,R.,Eichner,E.,Schlezinger,D,and Wood,1.2004.Linked Watershed-Embayment
<br /> Model to Determine Critical Nitrogen Loading Thresholds for Popponesset Bay,Mashpee and Barnstable,Massachusetts.
<br /> Commonwealth of Massachusetts,Department of Environmental Protection,Massachusetts Estuaries Project,138 pp.
<br /> z Howes B„S.Kelley,E,Eichner,R.Samimy,J.S.Ramsey,D.Schlezinger,P.Detjens(2011).Massachusetts Estuaries Project
<br /> Linked Watershed-Embayment Approach to Determine Critical Nitrogen Loading Thresholds for the Waquoit Bay and Eel Pond
<br /> Embayment System,Towns of Falmouth and Mashpee,MA,Massachusetts Department of Environmental Protection,Boston,
<br /> MA.234 pp.
<br /> s Eichner,E„B,Howes,S.Kelley,and J.Ramsey.December 15,2009,MEP Technical Memo to Tom Fudala,Chair,Mashpee
<br /> Sewer Commission regarding Report on Unified Database and Requested MEP Scenarios for the;(a)Popponesset Bay Estuary
<br /> and(b)Eastern Basins of the Waquoit Bay System.
<br /> 4 Eichner,E.,8,Howes,S.Kelley,and J.Ramsey.February 9,2010,MEP Technical Memo to Pit,Lombardo,Lombardo Associates
<br /> and Tom Fudala,Chair,Mashpee Sewer Commission regarding Report on Revised Scenario 3 for Eastern Basins of the Waquoit
<br /> Bay System.
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