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2019 Water, Recycled Water, and Sewer Rate Study <br />4. Rate Structure <br />Utility Costs will be recovered through the Water Utility Charge. The details of this rate structure are <br />presented in Figure 4-1. <br />Commodity Costs <br />Driven by the volume of water <br />sold <br />• Water Purchases <br />• Pumping Electricity <br />1 <br />Water Usage Charge <br />(variable) <br />1p <br />Utility Costs <br />Driven by the size of the utility <br />infrastructure <br />Figure 4-1: Water Rate Structure Cost Categories <br />Sewer Rates <br />• Operations <br />• Maintenance <br />• Capital <br />1 <br />Water Utility Charge <br />(fixed) <br />The proposed sewer rate structure is a single fixed Sewer Utility Charge, which is comprised of an <br />Account Cost component and a Utility Cost component. This recommendation is being made to reflect <br />the fact that nearly 100% of the Sewer Enterprise expenses are fixed. The details of this rate structure <br />are presented in Figure 4-2. <br />Account Costs (7%) <br />Driven by the cost of <br />managing accounts <br />Billing <br />Customer Service <br />0 <br />Meter Costs <br />Driven by the size of the <br />collection system infrastructure <br />J* <br />Sewer Utility Charge <br />Figure 4-2: Sewer Rate Structure Cost Categories <br />• Operations <br />• Maintenance <br />• Capital <br />City of Santa Ana Stantec 129 <br />