CITY COUNCIL REGULAR MEETING AGENDA PACKET

13 CITY OF PLEASANTON Table 4: Wastewater Return to Sewer Factor Line No. Description Derivation Values 1 Estimated billed water consumption for SFR (HCF) - 3,012,950 Estimated wastewater flow for SFR 2 Wastewater Accounts - 19,235 3 Household density - 3.4 4 Flow per day (GPD) - 55 5 Estimated wastewater flow (HCF) Line 2 x Line 3 x Line 4 x 365 / 748 1,755,194 6 Return to Sewer Factor Line 1 / Line 5 0.58 Table 5: Wastewater SFR Equivalent Capacity Demand Line No. Description Derivation Values SFR Equivalent Capacity Demand 1 GPD Flow - 390 2 Return to Sewer Factor Table 4 0.58 3 Estimated GPD Demand Line 1 x Line 2 227 The demands that the expansion improvements can serve are calculated by dividing the future capacity by the SFR equivalent capacity demand. The expansion CIP projects are estimated to add 2.05 MGD. This calculation is detailed in Table 6. Table 6: Wastewater Projected SFR Equivalents Line No. Description Derivation Values Future Wastewater System Capacity 1 Future Capacity (MGD) - Project 3 - 1.6 2 Future Capacity (MGD) - Project 4 - 0.45 3 Future Capacity (MGD) - Total Line 1+ Line 2 2.05 4 Future Capacity (GPD) Line 3 x 1,000,000 2,050,000 SFR Equivalent Capacity Demand 5 Estimated GPD Demand Table 5 227 6 SFR Equivalent Units Served Line 4 / Line 5 9,023 INCREMENTAL UNIT COST The Incremental unit cost for an SRF equivalent is the quotient of the Incremental system valuation divided by the additional SFR equivalent units served by expansion projects. The Incremental unit cost component is $556.24 per SFR equivalent. Table 7 shows the unit cost calculation. Table 7: Wastewater Incremental Unit Cost Calculation Line No. Fee Calculation Derivation Values 1 Total Expansion CIP Table 3 $5,019,000 2 SFR Equivalent Units Served Table 6 9,023 3 SFR Equivalent Unit Fee Line 1 / Line 2 $556.24 Page 160 of 893