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e) Low Water Use Fixtures and Retrofits-- New construction is required to comply with the standards for low-water-use fixtures in accordance with the Uniform Plumbing Code. However, the potential exists for obtaining substantial water use reduction through retrofitting the substantial volume of fixtures which were installed prior to the adoption of code requirements for low water usage. Of particular interest is providing for retrofits of older model toilets which utilize from 5.5 to 8 gallons per flush. Water saved from toilet retrofits would be available during critically dry conditions in February which corresponds to a period of peak occupancy and resulting high indoor water usage. Toilet retrofit rebate programs have proven to be a cost effective means of improving water supply and deferring or eliminating the need to invest in expanded water supply systems. It is estimated that there are 12,000 high-flush volume toilets which could be retrofitted to low flow (1.6 gallons per flush) toilets. The maximum potential for toilet retrofit (retrofit of all existing older models) is estimated to save 0.17 MGD during critical low flow conditions. An aggressive program with a 50% participation rate would retrofit approximately 7000 toilets at an annual rate of 700 toilets per year, saving a total of 0.09 MGD water demand at a cost less than $11 0 acre-feet. f) Efficient Landscape Irrigation-- Collection of additional information regarding weather and meteorological conditions will improve the City's ability to improve the effectiveness of landscape irrigation at the municipal golf course and other public facilities. In addition, making this information available to the public will provide similar advice on desirable irrigation rates and timing to avoid water wastage. The City has budgeted for the installation of a weather station at the municipal golf course in 1996. It also operates the U.S. Weather Station at the Water Treatment Plant site. These two data points will provide the ability for the City to provide public information regarding evapotranspiration and the expected water needs throughout the irrigation season. SECTION 4. IMPLEMENTATION OF EXISTING AND PROPOSED WATER CONSERVATION MEASURES Existing water conserVation measures are funded through either the operating budget or the capital program for the Water Fund. The cost of water conservation programs are recovered through water rates and tap fees. This is the same mechanism used for water development activities which can serve a similar purpose in achieving the City's water management goals. 19