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ERU Definition <br />® County's "ERU": ("Typical Residential Unit") <br />- 0 to 300 gallons per day on maximum day basis <br />- 0 to 250 gallons per day on maximum month <br />basis <br />® Advantages <br />- Reflects reasonable peaking factor relationships <br />- Important to have a flow definition for non- <br />residential customer classes <br />- May reflect County's own historical data <br />■ Disadvantages <br />- Flow equivalent appears low, especially when <br />compared with FPSC rules & Chapter 10D-6, FAC <br />- Combines average for single-family, multiple - <br />family, and mobile home/trailer <br />- Excess volume surcharge kicks in at 13,000 gals. <br />per month; however, since 1 ERU is defined as <br />7,600 gals./month, second ERU is "free" if using <br />maximum month basis <br />Rate Making Principles <br />Equity - <br />® Revenue adequacy - <br />® Economic efficiency - <br />® Administrative simplicity - <br />® Compliance with legal constraints <br />