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84 appendix B Measure Calculation Assumptions <br />Energy- <br />Solar Photovoltaic Systems <br />Based on PV on parking garage about 1 00f x 2003 = <br />Municipal <br />20,000 sq ft. 8 -10 watts ac output per sq tt is typical, <br />Operations <br />using 8 watts/ sq ft as a conservative estimate =160 kw <br />- <br />; potential for site. Using PV watts (www.nrel.gov /rredc/ <br />pvwatts) program gives 236,594 kwh annual AC output. <br />Energy— <br />Vending Machine Retrofits <br />Estimated 66 vending machines. Savings of 2,231 kWh/ <br />Municipal <br />vending machinelyear (from the Energy Star savings <br />Operations <br />calculator for 500 can capacity vending machines with <br />additional software controls). <br />Solid Waste <br />AB 341 Commercial and Multifamily <br />Assumes recycling diversion rate increases to 35% by <br />Recycling <br />2020 and 50% by 2035. <br />Solid Waste <br />food Waste Digestion <br />Total organic waste taken from inventory; residential <br />= 57.8% food waste, commercial =72.8% food waste <br />(percentages of organic waste: source Cal Recycles). <br />3300 ft3 biogas/ton food waste. 1000 BTU /ft3 biogas <br />(biogas production and BTU content from East Bay <br />Municipal Utility District 2008. "Anaerobic Digestion of <br />Food Waste. "), Combustion turbine with 35% generation <br />efficiency, 85% capacity factor. 3,412kWh /BTU. By 2020 <br />capturing 25% of food waste, by 2035 capturing 75 %. <br />Water and <br />Rainwater Harvesting <br />2,116 ft2 average roof area (estimated with GIS) per <br />Wastewater <br />- <br />home. Annual rainfall 13.63 inches, 50% captured. <br />- <br />11,110 kWh /million gallons water. 1000 rain barrels = 29 <br />MTCOze /yr <br />Water and - <br />Turf Removal <br />296 f12 average yard size in Santa Ana (based on sample <br />Wastewater <br />of 32 yards measured with GIS). Water requirement 0.6 <br />ft3 /year /ft2 (from University of California Agriculture and <br />Natural Resources "Lawn Watering Guide for California. ") <br />500 homes participate by 2020; 2000 by 2035. 2.6 <br />million ft3 /year water saved. 11,110 kWh /million gallons <br />water. <br />75B -92 <br />