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City of Santa Ana <br />TABLE OF CONTENTS <br />MainPlace Mall Transformation Project <br />Water Supply Assessment <br />1 INTRODUCTION...............................................................................................................................4 <br />1.1 Background..............................................................................................................................4 <br />1.1.1 Fashion Square Commercial Center Final EIR- 1983....................................................................4 <br />1.1.2 Addendum to the Final EIRfor MainPlace/SantaAna —2000....................................................4 <br />2 PROPOSED PROJECT DESCRIPTION...................................................................................................5 <br />2.1 Project Location.......................................................................................................................5 <br />2.2 Proposed Project......................................................................................................................5 <br />3 Regulatory Setting...........................................................................................................................9 <br />3.1 Purpose....................................................................................................................................9 <br />3.2 Senate Bill 610 and 221............................................................................................................9 <br />3.2 Water Conservation Act of 2009(SBx7-7)...............................................................................11 <br />4 Water Setting................................................................................................................................12 <br />4.1 City of Santa Ana Water Supply..............................................................................................12 <br />4.2 Retail Water Supply................................................................................................................12 <br />4.3 Water Rights/Groundwater Supply.........................................................................................13 <br />4.4 Reliability of Water Sources...................................................................................................15 <br />4.4.1 Normal -Year Reliability Comparison............................................................................................16 <br />4.4.2 Single Dry -Year Reliability Comparison........................................................................................17 <br />4.4.3 Multiple Dry -Year Period Reliability Comparison........................................................................17 <br />4.5 City of Santa Ana Water Infrastructure...................................................................................18 <br />4.5.1 Overall City Infrastructure............................................................................................................18 <br />4.5.2 System Pressures..........................................................................................................................19 <br />4.5.3 Local Project Infrastructure..........................................................................................................19 <br />4.6 Project Water Demand........................................................................................................... <br />20 <br />4.7 Water Shortage Contingency Plan..........................................................................................22 <br />4.7.1 Demand Management Measures (DMM)...................................................................................23 <br />Summaryand Conclusions.....................................................................................................................24 <br />References............................................................................................................................................ <br />25 <br />Kimley»)Horn 55C-9 Page ) i <br />