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4 -A -i9 <br />DRAFT URBAN WATER MANAGEMENT PLAN <br />1.2.1 Passive Water Conservation <br />Before addressing BMPs, it is necessary to quantify passive conservation associated with <br />high- efficiency toilets and clothes washers. These two fixtures, that account for about <br />half of total residential indoor water use, are somewhat unique in that California state and <br />Federal laws have mandated that only high- efficiency toilets be sold as of 1992 and high - <br />efficiency clothes washers be sold starting in 2007 5 <br />Toilet and clothes washer water savings, therefore, will occur over time as consumers <br />have no choice, or soon will have no choice, but to buy high- efficiency models upon <br />replacement. The natural replacement of older water use fixtures with these more water <br />efficient ones is defined as passive conservation. Because some of the BMPs are <br />associated with toilets and clothes washers, it is necessary to first quantify passive water <br />conservation from these uses so as to not double count water savings. <br />As shown in Table 1.3, post -2000 passive water savings ultimately will reach 1,584 AFY. <br />About 965 AFY of passive conservation is expected to occur by 2020. These estimates <br />are based on assumptions regarding the natural life cycle of toilets and clothes washers as <br />presented in Appendix C. <br />1.2.2 BMP History <br />This section describes the City's past and current activity regarding each BMP. The next <br />section shows an implementation plan for the future. <br />5 Governor Davis signed AB 1561 into law on September 7, 2002. This bill requires the State Energy <br />Commission to change the standards for residential clothes washers manufactured on or after January 1, <br />2007 to be at least as efficient as commercial washers. For these commercial clothes washers, the standard <br />Modified Energy Factor (cubic feet of laundry that can be washed and dried with one kWh of electricity) is <br />currently 1.26, with a Water Factor (number of gallons needed for each cubic foot of laundry) of 9.5. <br />Table 1.3 <br />Passive Water Savings, Post Year <br />2000 in AFY <br />Device <br />Class <br />2005 2010 <br />2015 <br />2020 Ultimatel <br />Single Family <br />97 176 <br />240 <br />i790 <br />292 <br />52 <br />�oilets <br />Multiple Family <br />64 116 <br />159 <br />194 <br />347 <br />Commercial <br />53 95 <br />130 <br />159 <br />285 <br />lothes <br />Single Family <br />21 107 <br />164 <br />203 <br />281 <br />Washers <br />Multiple Family <br />14 62 <br />97 <br />118 <br />147 <br />Total <br />248 556 <br />965 <br />1,58 <br />1.2.2 BMP History <br />This section describes the City's past and current activity regarding each BMP. The next <br />section shows an implementation plan for the future. <br />5 Governor Davis signed AB 1561 into law on September 7, 2002. This bill requires the State Energy <br />Commission to change the standards for residential clothes washers manufactured on or after January 1, <br />2007 to be at least as efficient as commercial washers. For these commercial clothes washers, the standard <br />Modified Energy Factor (cubic feet of laundry that can be washed and dried with one kWh of electricity) is <br />currently 1.26, with a Water Factor (number of gallons needed for each cubic foot of laundry) of 9.5. <br />