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Page 34 of 38 <br />ATTY/AGR/2017.104/SMART ENERGY SYSTEMS – CUSTOMER WATER USE PORTAL <br />REV: 05-15-17 MI <br />Exhibit “D” <br />Water Budget Calculation <br /> <br />Introduction: <br />This document represents the current methodology for calculating water budgets for <br />landscape irrigation and residential water utility accounts in Redwood City. This <br />methodology is subject to change due to changes in water supply, drought, state <br />regulation, or local policy. The system used to calculate water budgets should be <br />configurable by City staff with minimal intervention from CONSULTANT in order to meet <br />the changing needs of the City. <br /> <br />Background: <br />Redwood City water budgets are based on the Landscape Coefficient Method that is the <br />standard of the Green Industry. It is endorsed by the Irrigation Association, California <br />Landscape Contractors Association, California Urban Water Conservation Council, and <br />over 300 water agencies as the best methodology for identifying and maximizing <br />landscape irrigation efficiency. Water Budgets are calculated daily for the previous day <br />utilizing weather data retrieved from external web services. At the end of a consumption <br />period the water budgets calculated for each day in the period are added to provide a <br />sum total water budget used by the billing system. <br /> <br />Methods: <br />1. Calculate and present residential and irrigation water budgets as described as <br />follows. <br />a. Graphically display a line or similar feature representing a water use budget <br />utilizing daily values calculated by CONSULTANT for individual accounts or <br />groupings of accounts using the process maintained by the City’s Utility <br />Billing System. <br />i. CONSULTANT shall integrate with the City’s Utility Billing System <br />which maintains a process to group accounts that share a water <br />budget using one unique value called “Site ID” in conjunction with a <br />coded value water use type classification. The two values together <br />are referred to as a “Sub-Site” <br />b. Site ID is a 6 digit numeric value <br />c. Water Use Type is a 2 digit numeric value as follows <br /> <br />1 RETAIL <br />2 FIRE <br />3 IRRIGATION <br />4 OFFICE <br />5 MF RESIDENTIAL <br />6 INSTITUTIONAL <br />7 FOOD SERVICES <br />8 INDUSTRIAL <br />9 HEALTH SERVICES <br />10 LAUNDRY <br />11 LODGING <br />6.1.E. - Page 37