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A <br /> WDODARD <br /> &CURRAN <br /> Contents <br /> 1. Introduction.......................................................................................................................................................1 <br /> 1.1 Project Background...........................................................................................................................1 <br /> 1.1.1 City of Lathrop........................................................................................................................1 <br /> 1.1.2 River Islands at Lathrop..........................................................................................................2 <br /> 1.1.3 South San Joaquin Irrigation District......................................................................................2 <br /> 1.1.4 Project Description .................................................................................................................2 <br /> 1.2 Applicability.......................................................................................................................................6 <br /> 1.2.1 When a WSA is Required.......................................................................................................6 <br /> 1.2.2 Public Water System Identified...............................................................................................7 <br /> 1.2.3 Required for Submittal of Assessment...................................................................................8 <br /> 1.3 Urban Water Management Plan and Other Resources.....................................................................9 <br /> 2. Water Supply...................................................................................................................................................10 <br /> 2.1 Existing Water Supplies..................................................................................................................10 <br /> 2.1.1 Existing Wholesale Water Supply—SSJID...........................................................................11 <br /> 2.1.2 Groundwater.........................................................................................................................13 <br /> 2.1.3 Wastewater and Recycled Water.........................................................................................19 <br /> 2.1.4 Other Non-Potable Supplies.................................................................................................21 <br /> 2.1.5 Water Conservation..............................................................................................................22 <br /> 2.2 Future Water Supplies ....................................................................................................................22 <br /> 2.3 Water Supply Reliability..................................................................................................................24 <br /> 2.3.1 SSJID Water Reliability.........................................................................................................24 <br /> 2.3.2 Groundwater Supply Reliability.............................................................................................28 <br /> 3. Water Demand.................................................................................................................................................31 <br /> 3.1 Future Water Demands...................................................................................................................31 <br /> 3.1.1 Water Demand Factors.........................................................................................................31 <br /> 3.1.2 Project Water Demand Projections.......................................................................................32 <br /> 3.1.3 Comparison to 2002 Projections...........................................................................................34 <br /> 3.1.4 City of Lathrop Projected Demands......................................................................................36 <br /> 4. Dry Year Analysis............................................................................................................................................37 <br /> 4.1 Normal Years..................................................................................................................................37 <br /> 4.2 Single-Dry Years.............................................................................................................................38 <br /> 4.3 Multiple-Dry Years...........................................................................................................................38 <br /> 5. Sufficiency Determination..............................................................................................................................40 <br /> 5.1 Supply and Demand Comparison ...................................................................................................40 <br /> Califia(0011533.00) i Woodard&Curran, Inc. <br /> River Islands Phase 2 Development Water Supply Assessment September 2020 <br />