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Wastewater Master Plan <br />City of San Marcos <br />TABLE OF CONTENTS <br />Table of Contents <br />ExecutiveSummary ................................................................................................................................................ ............................... ES -1 <br />1.0 <br />INTRODUCTION ............................................................................................................................................. ............................1 -1 <br />1.1 <br />Scope of Work ........................................................................................................................................ ............................1 <br />-1 <br />1.2 <br />List of Abbreviations ........................................................................................................................... ............................1 <br />-2 <br />2.0 <br />POPULATION AND WASTEWATER FLOWS ....................................................................................... ............................2 <br />-1 <br />2.1 <br />Existing And Future Population ..................................................................................................... ............................2 <br />-1 <br />2.2 <br />Historical Wastewater Flow .......................................................................................................... ............................... <br />2 -7 <br />2.3 <br />Projected Wastewater Flows ........................................................................................................ ............................... <br />2 -7 <br />3.0 <br />DESCRIPTION OF THE EXISTING WASTEWATER SYSTEM ..................................................... ............................... <br />3 -1 <br />3.1 <br />Major Basins ......................................................................................................................................... ............................... <br />3 -1 <br />3.2 <br />Wastewater Lines ................................................................................................................................. ............................3 <br />-1 <br />3.3 <br />Wastewater Treatment Plant ....................................................................................................... ............................... <br />3 -3 <br />3.4 <br />Lift Stations ........................................................................................................................................... ............................... <br />3 -4 <br />4.0 <br />LIFT STATION RISK BASED ASSESSMENT ...................................................................................... ............................... <br />4 -1 <br />4.1 <br />Condition Assessment ..................................................................................................................... ............................... <br />4 -1 <br />4.2 <br />Criticality Assessment ........................................................................................................................ ............................4 <br />-4 <br />4.3 <br />Risk Assessment ................................................................................................................................. ............................... <br />4 -5 <br />5.0 <br />WASTEWATER FLOW MONITORING ................................................................................................... ............................5 <br />-1 <br />5.1 <br />Flow Monitor and Rain Gauge Locations ................................................................................ ............................... <br />5 -1 <br />5.2 <br />Flow Monitoring Data ...................................................................................................................... ............................... <br />5 -5 <br />5.3 <br />Flow Monitoring Results ................................................................................................................ ............................... <br />5 -6 <br />5.4 <br />Self- Cleansing Conditions ............................................................................................................... ............................... <br />5 -9 <br />5.5 <br />Rain - Dependent Inflow and Infiltration ............................................................................... ............................... <br />5 -11 <br />5.6 <br />Summary of Flow Monitoring Analysis ................................................................................. ............................... <br />5 -15 <br />6.0 <br />HYDRAULIC MODEL DEVELOPMENT & CALIBRATION ............................................................ ............................... <br />6 -1 <br />6.1 <br />Wastewater GIS Evaluation ........................................................................................................... ............................... <br />6 -1 <br />6.2 <br />Data Flagging .......................................................................................................................................... ............................6 <br />-2 <br />6.3 <br />Network Model Development ...................................................................................................... ............................... <br />6 -3 <br />6.4 <br />Wastewater Model Attribute Information .............................................................................. ............................... <br />6 -4 <br />6.5 <br />Model Subcatchments ...................................................................................................................... ............................... <br />6 -7 <br />6.6 <br />Flow Allocation ...................................................................................................................................... ............................6 <br />-7 <br />6.7 <br />Wastewater Model Calibration .................................................................................................... ............................... <br />6 -9 <br />6.8 <br />Special calibration conditions ................................................................................................... ............................... <br />6 -13 <br />7.0 <br />WASTEWATER SYSTEM ANALYSES AND HYDRAULIC MODELING ....................................... ............................7 <br />-1 <br />7.1 <br />Existing Wastewater System Analysis ...................................................................................... ............................... <br />7 -1 <br />7.2 <br />Future Wastewater System Analysis ........................................................................................ ............................... <br />7 -4 <br />8.0 <br />WASTEWATER SYSTEM CAPITAL IMPROVEMENTS PLAN .................................................... ............................... <br />8 -1 <br />8.1 <br />Wastewater Projects from 2014 to 2020 ................................................................................... ............................8 <br />-8 <br />8.2 <br />Wastewater Projects from 2021 to 2025 ............................................................................. ............................... <br />8 -13 <br />8.3 <br />Wastewater Projects from 2026 to 2035 ............................................................................. ............................... <br />8 -17 <br />