12/20/2012 SEWER COMMISSION Minutes

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Table 2. Scenario Watershed Nitrogen Loads: Waquoit Bay Attenuated total nitrogen loads by subembayment and surface water input to Waquoit Bay are presented for each Mashpee Sewer Commission scenario. All scenarios loads are based on build-out nitrogen loading conditions using the updated SMAST unified land use database for Mashpee; MEP build-out loads are presented for comparison. Loads do not include atmospheric deposition onto the sub- embayment surface or benthic flux loading terms. "Threshold" load is from the scenario used in the MEP technical report to meet the N threshold levels in the Bay. MEP Scenarios(all are buildout conditions) sub-embayment Buildout threshold threshold% Option I Option 1B Option I load (kg/day) change % % % (kg/day) (kg/day) change (kg/day) change (kg/day) change Waquoit Bay 3.17 2.09 -34.1% 2.28 -28.1% 2.28 -28.1% 2.28 -28.1% Childs River-upper 14.08 4.08 -71.1% 12.58 -10.6% 12.58 -10.6% 12.58 -10.6% Eel Pond-east branch 2.32 0.82 -64.7% 2.25 -3.1% 2.25 -3.1% 2.25 -3.1% Eel Pond-south basin 0.55 0.52 -4.9% 0.54 ' -1.8% 0.54 -1.8% 0.54 -1.8% Eel Pond-west branch 22.98 8.81 -61.7% 16.28 -29.2% 16.28 -29.2% 16.28 -29.2% Quashnet River 3.36 1.50 -55.4% 1.00 -70.2% 1.00 -70.2% 1.00 -70.2% Hamblin Pond 7.12 0.95 -86.6% 1.26 -82.3% 1.26 -82.3% 1.26 -82.3% Little River 1.44 0.21 -85.3% 0.27 -81.2% 0.27 -81.2% 0.27 -81.2% Jehu Pond 4.22 1.02 -75.7% 1.07 -74.7% 1.07 -74.7% 1.07 -74.7% Great River 4.70 1.00 -78.8% 1.12 -76.2% 2.08 -55.6% 2.08 -55.8% Sage Lot Pond 3.66 1.62 -55.7% 1.74 -52.4% 1.74 -52.4% 1.74 -52.4% Surface Water Sources Childs River-freshwater 26.39 4.12 -84.4% 11.43 -56.7% 11.43 -56.7% 11.43 -56.7% Moonakiss River(upper 35.26 13.47 -61.8% 13.20 -62.6% 13.22 -62.5% 13.22 -62.5% uashnet Red Brook-freshwater 10.98 2.10 -80.9% 2.00 -81.8% 2.28 -79.2% 2.28 -79.2% TOTAL 130.06 40.21 -70.7% 64.73 -52.8% 66.00 -51.8% 65.99 -51.9%