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Table 4. Threshold Comparison Results for Mashpee Sewer Commission Scenarios: Waquoit Bay <br /> Comparison of TN concentrations for present conditions,threshold loading,and three modeled buildout loading scenarios for the Waquoit Bay <br /> system. MEP threshold concentrations for Waquoit Bay are 0.380 mg(L TN for eelgrass(primary),and between 0.400 and 0.500 mglL TN for <br /> infauna(secondary). TMDLs were established for Quashnet River,Hamblin Pond,Little River,Jehu Pond,and Great River in 2007,but the official <br /> EPA approval letter does not contain TN concentrations. The thresholds listed below are from the MEP reports for Eastern Waquoit Bay and the <br /> overall system. The MEP thresholds for Quashnet River,Hamblin Pond,Little River,Jehu Pond,and Great River did not change in the evaluation of <br /> the entire system. <br /> Habitat Present TNID <br /> TMDL section threshold .Thresshold <br /> Scenario Option IA Scenario Option 1B Scenario Option IC <br /> hold <br /> m m m m m <br /> East Wa uoit—TMDL established <br /> Jehu Pond-WB 1 eelgrass 0.630 0.446 0.471 1 0.481 1 0.481 <br /> Great/Little River-WB3 eel 0.427 0.38 0.355 0.359 0.359 <br /> Hamblin Pond-WB4 eel ass 0.521 0.38 0.390 0.398 0,398 <br /> Quashnet River-W137,WB8 infauna 0.704 0.52 0.502 0.503 1 0.503 <br /> Rest of Wa uoit-MEP Re ort read for review <br /> U er W uoit Bay-WB 12 eel ass I 0.400 0.38 1 0358 0.359 0.359 <br /> Mid Childs River-CR2 eel ass 0.651 0.38 0.688 0.687 0.687 <br /> Upper Eel River-ERI nfauna 0.669 0.5 0.679 0.679 0.679 <br /> Notes: <br /> 1) shaded cells indicate Scenarios that meet TMDLIMEP thresholds for eelgrass or infauna. <br /> 2) MEP Thresholds for rest of Waquoit are from: Howes B.,S.Kelley,E.Eichner,R.Samimy,J.S.Ramsey,D.Schlezinger,P.Det ens <br /> (2011). Massachusetts Estuaries Project Linked Watershed-Embayment Approach to Determine Critical Nitrogen Loading Thresholds for <br /> the Waquoit Bay and Eel Pond Embayment System,Towns of Falmouth and Mashpee,MA,Massachusetts Department of Environmental <br /> Protection.Boston,MA. <br />