City of Phoenix Water Services Department Water Remote Facilities Design Guidance Manual August 2013 TABLE OF CONTENTS CHAPTER 1 – PURPOSE AND USE OF GUIDE 8 1.1 Purpose ………………………………………….………… 8 1.2 Use of the Design Guide....................................................... 8 CHAPTER 2 – PROJECT PROCEDURE 9 2.1 Design Milestones………………………………..……....… 9 2.1.1 30% Conceptual Design………….…..................… 9 2.1.2 60% Preliminary Design……………………...…... 10 2.1.3 90% Pre-Final Design………………………...…... 11 2.1.4 100% Final Design………………...….….…...…… 11 2.2 Project Phasing..................................................................... 11 2.3 CADD Standards.................................................................. 12 2.4 Water Services Department (WSD) Guide Specifications 12 2.4.1 Deviations from City of Phoenix Guidelines….…. 12 2.5 Public Outreach.................................................................... 13 CHAPTER 3 – AGENCIES, CODES AND PERMITS 14 3.1 Agencies and Publications................................................... 14 3.1.1 Planning and Development Department……..….. 14 3.1.2 Fire Department....................................................... 15 3.2 Permits and Regulations...................................................... 15 3.2.1 Real Estate Acquisitions.......................................... 16 3.2.2 Environmental Permits............................................ 16 3.2.3 Water Quality........................................................... 16 3.2.4 Biological Evaluation............................................... 17 3.2.5 Air Quality................................................................ 17 3.2.6 Cultural Resources.................................................. 18 3.2.7 Construction Permits............................................... 19 3.3 Utility Coordination............................................................. 19 3.4 City Review and Permitting Fees....................................... 20 CHAPTER 4 – CAPACITY ANALYSIS 21 4.1 Quantity................................................................................ 21 4.2 Peaking Factors.................................................................... 21 4.3 Flow Rates............................................................................ 22 CHAPTER 5 – HYDRAULICS 24 5.1 General................................................................................. 24 5.1.1 Calculations of Headloss......................................... 24 5.1.2 System Head Curve................................................. 25 5.1.3 Pump Curves........................................................... 25 5.2 Minimum Requirements..................................................... 26 5.3 Steady-State Analysis.......................................................... 26 5.4 Transient Analysis............................................................... 27 2 5.5 Project Phasing..................................................................... 28 5.6 WSD Standards.................................................................... 29 CHAPTER 6 – MECHANICAL 30 6.1 Referenced WSD Guide Specifications.............................. 30 6.2 General Station Layout....................................................... 30 6.3 Station Piping....................................................................... 30 6.4 Pump Systems....................................................................... 31 6.4.1 Pump Selection......................................................... 31 6.4.2 Net Positive Suction Head....................................... 32 6.4.3 Pumping Units.......................................................... 33 6.4.4 Motor Requirements................................................ 37 6.4.5 Drive Equipment...................................................... 38 6.5 Valves.................................................................................... 39 6.5.1 Check Valves............................................................ 40 6.5.2 Pump Control Valves............................................... 40 6.5.3 Isolation Valves........................................................ 41 6.5.4 Valve Actuators (Operators)................................... 41 6.5.5 High Pressure Relief Valves.................................... 42 6.5.6 Hydropneumatic Surge Tanks................................ 42 6.5.7 Miscellaneous Valves................................................ 42 6.6 Flow Meters........................................................................... 44 6.7 Vaults..................................................................................... 45 6.7.1 Vault Sumps.............................................................. 45 6.8 Sump Pump........................................................................... 47 6.9 Chlorine Residual, Turbidity Sampling, & pH Sampling 47 6.9.1 Chlorine Residual Analyzer..................................... 48 6.9.2 pH Sampling.............................................................. 48 6.10 Disinfection System.............................................................. 48 6.10.1 Chlorine Gas............................................................. 49 6.10.2 Sodium Hypochlorite Solution................................ 49 6.10.3 Capacity and Points of Injection............................. 50 6.10.4 Chemical Solution Piping........................................ 50 6.10.5 Storage Tanks........................................................... 50 6.10.6 Safety......................................................................... 50 6.10.7 Chemical Injection Using an Eductor.................... 51 6.10.8 Chemical Metering Pump....................................... 51 6.10.9 Sample Lines.............................................................. 51 6.10.10 Residual Analyzers.................................................. 51 6.10.11 Chlorine Residual Sampling................................... 51 6.11 Heating, Ventilation and Air Conditioning (HVAC)........ 51 6.11.1 Applicable Codes and Standards............................ 52 6.11.2 Equipment Layout................................................... 53 6.12 Washdown Systems.............................................................. 53 6.13 Fire Protection...................................................................... 54 6.14 Pressure Reducing Stations (PRVs)................................... 54 6.15 Summary............................................................................... 56 3 6.16 Equipment............................................................................. 56 6.16.1 WSD Standards – Station Piping............................ 57 6.16.2 WSD Standards – Pump System Components...... 57 CHAPTER 7 – RESERVOIRS 63 7.1 General.................................................................................. 63 7.1.1 Site Selection............................................................. 63 7.1.2 Permits....................................................................... 63 7.1.3 Security Features...................................................... 63 7.1.4 Volume Criteria........................................................ 63 7.2 Geotechnical Investigations for Reservoirs........................ 64 7.2.1 Subsurface Vaults..................................................... 64 7.3 Site Civil Design.................................................................... 65 7.3.1 Site Safety.................................................................. 65 7.4 Structural Design.................................................................. 65 7.4.1 Applicability.............................................................. 65 7.4.2 Reference Standards and Codes............................. 65 7.4.3 Structural Loads....................................................... 66 7.4.4 Structural Design Requirements............................. 66 7.4.5 Concrete Foundations.............................................. 67 7.4.6 Concrete Walls.......................................................... 67 7.4.7 Concrete Floor Slab................................................. 67 7.5 Concrete Reservoir Design.................................................. 68 7.5.1 Cast-in-place Reservoir Type.................................. 68 7.5.2 Prestressed Concrete Reservoir Type.................... 68 7.5.3 Foundation and Reservoir Floor............................. 69 7.5.4 Reservoir Roof.......................................................... 70 7.5.5 Inlet and Outlet Piping............................................. 70 7.5.6 Drain.......................................................................... 71 7.5.7 Overflow.................................................................... 71 7.5.8 Reservoir Access....................................................... 72 7.5.9 Roof Vent.................................................................. 72 7.5.10 Roof Access............................................................... 72 7.5.11 Underdrain System................................................... 73 7.6 Steel Tank Design................................................................. 73 7.6.1 Design Criteria.......................................................... 73 7.6.2 Seismic Loads............................................................ 74 7.6.3 Wind Loads............................................................... 74 7.6.4 Roof Design..............................................................