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existing (2001) development data included in the MEP report. The ENGINEER will be responsible for obtaining <br /> and reviewing comparable data from the sections of adjacent towns within the study watersheds, a task for which <br /> assistance may be available form the Cape Cod Commission. <br /> C. ENGINEER will use a Geographic Information System (GIS) to make full use of the extensive parcel- <br /> based GIS data coverage developed by the Town and Cape Cod Commission, and natural resource data developed <br /> by Mass GIS. GIS maps will be produced to illustrate natural resources and development patterns in Mashpee, <br /> Sandwich,Barnstable, and Falmouth and will be used in later project phases to illustrate alternative scenarios. The <br /> Wastewater Facilities Concept Plan Map contained in the Town's Comprehensive Plan will be reviewed prior to <br /> the facilities planning process. <br /> Available GIS data from Falmouth, Sandwich and Barnstable will be used to access water consumption data, land <br /> usage information, Title 5 design information (number of bedrooms, floor area, etc.) and other planning <br /> information.A Notice of Project Change (NPC) will need to be filed because the joint Environmental Notification <br /> Form, Development of Regional Impact(ENF/DRI)environmental review document was submitted in 2000. <br /> Phase II Needs Estimates/Projected Flows. <br /> A. Investigate the current and anticipated future distribution of wastewater loadings within the Popponesset <br /> Bay and Waquoit Bay subwatersheds to be studied. These include the watersheds of Shoestring Bay, the Mashpee <br /> River estuary, Ockway Bay, the remainder of Popponesset Bay proper, Jehu Pond/Great River, Hamblins <br /> Pond/Little River and the Moonakis/Quashnet River estuary. Analysis of the full watershed of Waquoit Bay, <br /> which lies substantially in the Town of Falmouth, is beyond the scope of this study. The Sedge Lot Pond <br /> watershed lies entirely within South Cape Beach State Park, and will not be studied. The watershed of Great Flat <br /> Pond (Boundaries not mapped at this time), a largely fresh water pond connected by a man-made channel to <br /> Waquoit Bay, will not be studied but shall be avoided as a discharge area for the proposed effluent relocation <br /> pipeline. The goal is to identify and estimate the relative nitrogen loadings from different types of wastewater <br /> sources, allocated by the geographic location within a subwatershed as identified by the MEP. It is anticipated that <br /> this will involve estimates of both current and build-out annual and peak seasonal wastewater generation and <br /> resulting nitrogen loading from discrete areas within the Popponesset and Waquoit Bay watersheds based on the <br /> May 2005 Mashpee Planning Department buildout data and the MEP existing (2001) development data and / or <br /> large developments / subdivisions / neighborhoods, and from logical segments of the adjacent towns. The <br /> ENGINEER will be responsible for securing the available data for adjacent towns, a task for which assistance may <br /> be available from the Cape Cod Commission. Analysis areas are to be determined in conjunction with the Town <br /> Planner and COMMISSION. Any estimates developed will be based upon the data used by the N/lEP and shall be <br /> reviewed with the Town Planner, MEP and the Cape Cod Commission water resources staff before finalization. <br /> For large portions of the Town, Mashpee Water District water use records have been incorporated into the MEP <br /> report and will be used as part of this study. <br /> B. Prepare estimates of nitrogen inputs to each study watershed from non-wastewater sources, particularly <br /> those amenable to potentially feasible mitigation measures. Stormwater loads will be based on planimetric and <br /> topographic data available through the Town's and Barnstable's GIS systems. Reference should also be made to <br /> previous work of SMaST, Boston University Marine Program, Cape Cod Commission and others regarding <br /> sources of nitrogen in groundwater, and to K-V Associates and local sources regarding direct stormwater channels <br /> flowing to rivers and coastal water bodies. Estimates shall be reviewed with the Mashpee Town Planner, CMAST <br /> and the Cape Cod Commission water resources staff before finalization. <br /> C. Using the data prepared under tasks II A and B, prepare estimates of existing and projected build out total <br /> nitrogen loading from wastewater and other sources for each study subwatershed, as listed previously, with <br /> boundaries as mapped by the Cape Cod Commission water resources staff and the USGS. For build out <br /> conditions, new developments currently proposed to be served by private wastewater treatment plants should be <br /> assumed to be linked to a treatment plant. All other vacant developable land should be assumed to use Title 5 on- <br /> site disposal systems. <br /> D. Identify areas of greatest wastewater nitrogen loading per acre from the MEP report, in order to assist in <br /> cost effective targeting of nitrogen removal efforts. The ENGINEER will evaluate the data developed under the <br /> above tasks and identify areas having the highest nitrogen loading from wastewater applications for both current <br /> and buildout conditions. <br /> 2 <br />