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B4. Wastewater <br />Emissions of nitrous oxide from waste water treatment are calculated using the following equation: <br />Y = (Y)*(R) <br />MA1MA2W <br />Y = mitigated annual emissions of nitrous oxide from waste water treatment, tons/yr. <br />MA1 <br />Y = mitigated annual emissions of nitrous oxide from electricity used for potable water treatment and transportation, tons/yr. <br />MA2 <br />Red = xeriscape landscaping reduction proportion, 0.35 (California Integrated Waste Management Board, Publication No. 442-96-033, 1996) for single family residential. <br />1 <br />Red = low flush toilet reduction proportion, 0.03 (Riverside Public Utilities, Engineering Data). <br />2 <br />Red = Includes measures to be water-efficient (water-efficient fixtures & appliances) (3% reduction) <br />3 <br />, <br />Y <br />UM1 <br />tons/yr <br />RedRedRedY, tons/yr <br />123M <br />A <br />0.430.150.000.010.27 <br />Reduction percentage, %36.9689150 <br />C. Summary Table <br />Source TypeEmissions, tons/yr <br />GWP tons/yr <br />Construction equipment0.000.68 <br />Motor vehicles9.913072.10 <br />Direct <br />Landscape equipment7.40E-040.23 <br />Cooling and heating2.09E-026.47 <br />Total direct, tons/yr9.93 <br />Electricity0.0413.07 <br />Potable water0.52161.04 <br />Indirect <br />Solid waste0.93288.38 <br />Wastewater0.2784.30 <br />Total indirect, tons/yr1.76 <br />Total, tons/yr11.70 <br />20.13 <br />Reduction percentage, % <br />Global warming potential index310 <br />Global warming potential, tons/yr3,626.283626.28 <br />Page 14 of 14 <br />