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Coastal Systems Program <br /> School for Marine Science and Technology <br /> University of Massachusetts Dartmouth <br /> 706 South Rodney French Blvd_ <br /> New Bedford,MA 02744-1221 <br /> MEP Technical Memo <br /> TO: Tom Fudala,Chair,Mashpee Sewer Commission <br /> From: Ed Eichner,CSPISMAST <br /> Brian Howes,CSP/SMAST <br /> Sean Kelley,ACRE <br /> John Ramsey,ACRE <br /> Dates December 15,2009 <br /> Re: Report on Unified Database and Requested MEP Scenarios for the: <br /> (a)Popponesset Bay Estuary and(b)Eastern Basins of the Waquoit Bay System <br /> At the request of Mashpee Sewer Commission, two tasks were undertaken relative to evaluating <br /> nitrogen management alternatives for the Town of Mashpee: <br /> 1)Develop a unified database of the land and water-use information in the Popponesset and East <br /> Waquoit Bay watersheds, including the towns of Mashpee, Falmouth, Sandwich, and <br /> Barnstable, and <br /> 2) Evaluate five(5)wastewater management scenarios using the unified database and revised <br /> versions of the Massachusetts Estuaries Project(MEP) linked models for Mashpee's estuarine <br /> systems: Popponesset Bay and the 3 tributary basins to eastern Waquoit Bay. <br /> Each of these tasks and a summary of their results are described below. <br /> Unified Database Timeline <br /> As a context to the present effort, it is useful to review the timeline of MEP Technical Team <br /> involvement in assessments of Popponesset and Eastern Waquoit Bay. In September 2004, the <br /> MEP Technical Team released the Popponesset Bay Technical Report' and in January 2005, the <br /> Eastern Waquoit Bay Technical Report was released. The nitrogen thresholds in these <br /> Technical Reports eventually were approved as Total Maximum Daily Load(TMDL)limits by <br /> the US Environmental Protection Agency.3,4 <br /> Both Final MEP Technical Reports were released along with MEP Data Disks containing the <br /> watershed nitrogen loading models and the underlying GIS land use,parcel, and build-out <br /> information_ Collectively, the loading models relied on town-supplied information based on the <br /> following: <br />