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Exhibit I. DETERMINATION OF ANNUAL STORAGE LOSSES is revised to read: <br />Exhibit I. <br />DETERMINATION OF LOSSES ASSESSED TO <br />METROPOLITAN STORAGE ACCOUNT <br />A. Determination of Channel Losses Associated with Delivery of Storage Water via Service <br />Connection OC-59. <br />When Service Connection OC-59 is used to make deliveries to the Meiropolitan Storage <br />Account, channel losses shall be assessed to Metropolitan using the formula below that shall <br />reasonably approximate the channel losses calculated by the Santa Ana River Watermaster <br />("Watermaster"}. Should conditions affecting evapotranspiration and the assessment of these <br />channel losses by the Watermaster change such that this formula no longer closely approximates <br />the Watermaster's calculations as determined by the Operating Committee, then a) the <br />Watermaster's calculation shall be directly used; or b) the Operating Committee shall revise the <br />formula to obtain a close approximation of the Watermaster's calculation of channel losses. <br />To assess channel Iosses, delivery flaw rates shall be averaged each month using the total hours <br />of operation of OC-59 as posted on the Metropolitan Operations website. Any OC-59 deliveries <br />to the Metropolitan Storage Account shall be certified by Member Agency on a monthly basis. <br />• For monthly deliveries averaging 50 cfs or greater as measured at the OC-59 meter: 1 <br />loss of the total quantity delivered. <br />• For monthly deliveries averaging less than 50 cfs as measured at the OC-59: 4% loss of <br />the total quantity delivered. <br />Orange County Conjunctive Use Program <br />OC-59 Channel Loss Worksheet for Month Year <br />Tota! Monthly <br />AF Delivered Totai Monthly Operation <br />Period (hours) Avg. AF/Hour Avg. <br />AFlpay Average CFS <br /> <br />~ Channel Losses <br />(AFj <br />t%Or4% <br /> <br />Column 1: Total Monthly AF Delivered: Obtain OC-59 delivery data from Metropolitan <br />Operations website <br />Column 2: Total Monthly Operation Period (hours): Obtain OC-59 delivery data from <br />Metropolitan Operations website. <br />Column 3: Average AF/1-lour: Calculate as Column l,~Column 2 <br />Column 4: Average AFiUay: Calculate as Column 3 x 24 hours/day. <br />Column ~: Average CFS: Calculate as Column 4/1.983 AF/day <br />Column b: Channel Loss 1 °,% or 4%: Calculate as follows <br />• IfColumn S > SOefs, then Column 1 x .Ol =Channel Losses <br />• If Column 5< SOcfs, then Column 1 x .04 =Channel Losses <br />First Amendment S Groundwater Storage <br />