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2?3 CITY OF SANTA ANA PUBLIC WORKS AGENCY WATER RESOURCES DIVISION HIBIT A SCHEDULE W-CA WATER COMMODITY ADJUSTMENT CLAUSE A. ApDlicabilit¥ Applicable to all customers served by the water utility and to all rate schedule commodity charges. B. Purpose To provide for the automatic adjustment of the City's water rate schedule commodity charge per water billing unit (100 cubic feet) on an annual basis whenever the cost per acre-foot of water is increased or decreased due to changes in the Orange County Water District (OCWD) groundwater replenishment assessment, the cost of electricity associated with water pumping, or the Metropolitan Water District of Southern California (MWD) charge for imported water. To establish the method for determining the cost of water paid by the Utility per acre-foot of water and for calculating any resulting change (to the nearest mill) to the rate schedule commodity charge per water billing unit (100 cubic feet). c. Baseline Cost of Water The cost of water shall be the sum of the percentage of groundwater pumped times the cost of groundwater pumped plus the percentage of imported water times the cost of imported water. The cost of groundwater pumped shall be the sum of the replenishment assessment per acre-foot plus the cost of electricity associated with pumping water per acre-foot. The cost of imported water shall be the charge for treated water from MWD per acre-foot. The baseline cost per water shall be based on the following existing parameters: Percentage of groundwater pumped = 75% Percentage of water imported from MWD = 25% OCWD replenishment assessment = $51 per acre-foot Electricity cost for pumping = $60 per acre-foot MWD charge for treated water = $261 per acre-foot The baseline cost of water shall be initially set at: [.75 x ($51 +$60)] + [.25 x $261] = $148.50.