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Mr. Michael Grochala <br /> April 28, 2025 <br /> Page 5 <br /> Table 7 summarizes the projected wastewater characteristics and additional loading for the <br /> wastewater that will be generated under Scenario 2. <br /> Table 7. Projected Wastewater Characteristics and Additional Total Average Daily <br /> Wastewater Lo ding for Scenario 2 <br /> Parameter Concentration Average Load <br /> (mg/L) (lbs/day) <br /> Biochemical Oxygen Demand 220 4,471 <br /> Total Suspended Solids 220 4,471 <br /> Ammonia—Nitrogen 25 508 <br /> Total Phosphorous 8 163 <br /> Wastewater Proiection Comparison <br /> Table 11 summarizes the projected average wastewater flows from the 2005 Original AUAR and <br /> the 2025 AUAR Update for the scenarios outlined above. The 2005 Original AUAR used flow <br /> assumptions of 274 gpd/unit for residential development and 1,500 gpd/acre for commercial and <br /> industrial development. The 2005 flow assumptions were very conservative, so the 2020 flow <br /> assumptions used in this update have been revised to agree more closely with metered <br /> wastewater flows from the last five years. <br /> Table 11. Comparison of Average Wastewater Flow Projections <br /> Scenario 2005 Original 2025 AUAR <br /> AUAR Update <br /> Scenario 1 2.529 MGD 2.250 MGD <br /> Scenario 2 3.646 MGD 2.436 MGD <br /> Scenario 3 3.733 MGD N/A <br /> The projected wastewater flows have decreased in this update. Due to topography constraints, <br /> the expansion and layout of the sanitary sewer system will generally conform to the layout <br /> identified in the 2005 Original AUAR. However, the exact sizing of trunk facilities may be revised <br /> based on the most current wastewater flow projections. <br /> M:\027919-000\Admin\Docs\Water Wastewater\MEMO Wastewater 2025-02-14 Scenario 3 removed.docx <br /> Page 94 of 240 <br />