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SECTION 1: EXECUTIVE SUMMARY
<br />SECTION 1:
<br />EXECUTIVE SUMMARY
<br />1
<br />The City of Santa Ana Public Works Agency purchases 18,000,000 kWh per year to operate well pumps and
<br />booster pumps to deliver potable water to 45,000 customer meters. This report evaluates the potential to
<br />install on-site renewable energy systems to offset some of this electric load, lowering electric bills and reducing
<br />the associated greenhouse gas (GHG) emissions.
<br />The renewable energy resources evaluated include placing solar PV modules on the roofs of the storage tanks at
<br />five pump stations (Cambridge, East, Garthe, South and West), as well as at the City Yard; and recovering head
<br />from water that is delivered directly to the city from the Metropolitan Water District at a pressure that is higher
<br />than the city uses (SA -1 replacement, SA -3, SA -6).
<br />The implementation cost and energy savings have been calculated for these projects and a life cycle cost
<br />analysis has been performed for the anticipated 25 -year life of the equipment. The following table shows the
<br />anticipated overall cost and benefit projected for the city. 1.1.3
<br />The net effect of all these project is an investment of almost $8 million with 25 years of savings that will exceed
<br />the investment by about $2 million. This is not a great financial investment, but it is a good step in
<br />implementing the Climate Action Plan with a project that pays for itself.
<br />The implementation of these projects would reduce the Water Resources Divisions purchase of electricity by
<br />25% compared to 2016. This would also reduce the GHG emissions of 1,330 Metric tons of CO2 equivalent by a
<br />similar percentage from 2016. As the SCE fuel mix changes to less GHG from year to year, the GHG savings will
<br />Newcomb I Anderson I McCormick 19H-9 CITY OF SANTA ANA
<br />Turbine
<br />SA -1
<br />($638,763)
<br />$38,441
<br />$858,509
<br />$0.090
<br />425,299
<br />Turbine
<br />SA -3
<br />($835,988)
<br />$31,965
<br />$409,035
<br />$0.060
<br />536,973
<br />Turbine
<br />SA -6
<br />($1,072,174)
<br />$55,131
<br />$1,075,182
<br />$0.065
<br />845,901
<br />Solar
<br />Garthe Station
<br />($1,404,000)
<br />$38,165
<br />($148,834)
<br />$0.043
<br />894,325
<br />Solar
<br />South Station
<br />($194,832)
<br />$3,492
<br />($77,488)
<br />$0.046
<br />75,170
<br />Solar
<br />West Station
<br />($707,940)
<br />$39,780
<br />$635,398
<br />$0.094
<br />422,617
<br />Solar
<br />East Station
<br />($677,160)
<br />$19,080
<br />($43,018)
<br />$0.048
<br />393,985
<br />Solar
<br />Cambridge Station
<br />($334,800)
<br />$8,332
<br />($67,435)
<br />$0.045
<br />184,480
<br />Solar
<br />City Yard
<br />($1,890,767)
<br />$46,325
<br />($298,129)
<br />$0.053
<br />869,805
<br />Total
<br />Total
<br />($7,756,424)
<br />$280,711
<br />$2,343,220
<br />$0.060
<br />4,648,554
<br />The net effect of all these project is an investment of almost $8 million with 25 years of savings that will exceed
<br />the investment by about $2 million. This is not a great financial investment, but it is a good step in
<br />implementing the Climate Action Plan with a project that pays for itself.
<br />The implementation of these projects would reduce the Water Resources Divisions purchase of electricity by
<br />25% compared to 2016. This would also reduce the GHG emissions of 1,330 Metric tons of CO2 equivalent by a
<br />similar percentage from 2016. As the SCE fuel mix changes to less GHG from year to year, the GHG savings will
<br />Newcomb I Anderson I McCormick 19H-9 CITY OF SANTA ANA
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