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Santa Ana 2020 Urban Water Management Plan <br />arcadis.com <br />6-40 <br />Data Quality (Estimate, Metered Data, <br />Combination of Estimates and Metered Data) <br />Combination of Estimates and Metered Data <br />Data Quality Narrative: <br />Wastewater volume is an estimate based on water consumption in the service area. Energy is based on billed consumption. <br />Narrative: <br />Santa Ana operates the local wastewater collection system but does not operate treatment facilities. Operational control is limited <br />to a wastewater lift station in the local collection system. This table does not include downstream energy consumed to treat the <br />wastewater, after Santa Ana's control.