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Federal Facility Technical Standards

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Federal Facility Technical Standards FEDERAL FACILITY TECHNICAL STANDARDS TABLE OF CONTENTS Table of Contents .......................................................................................................................... 1 List of Figures 4 List of Tables 4 SECTION 1 INTRODUCTION AND PURPOSE ............................................................... 1-1 1.1 INTRODUCTION ......................................................................................................... 1-1 1.2 PURPOSE ..................................................................................................................... 1-1 1.3 SUMMARY OF THE FEDERAL FACILITY TECHNICAL STANDARDS ............ 1-1 1.4 TECHNICAL STANDARDS REQUIREMENTS, SUBMITTALS & SCHEDULES 1-3 SECTION 2 DEFINITION OF TERMS .............................................................................. 2-1 SECTION 3 PRE-REHAB FLOW, PRESSURE, RAINFALL (FPR) MONITORING AND DATA COLLECTION .................................................................................................... 3-1 3.1 REVIEW OF EXISTING INFORMATION ................................................................. 3-1 3.1.1 Sanitary Sewer Overflow Characterization ........................................................... 3-1 3.1.2 Prior Studies/Planned Construction ....................................................................... 3-2 3.1.3 Engineering and Operations ................................................................................... 3-3 3.1.4 Other Performance Documentation ....................................................................... 3-3 3.2 SYSTEM INVENTORY ............................................................................................... 3-3 3.2.1 Mapping Standards ................................................................................................ 3-4 3.2.2 GIS Data Standards ................................................................................................ 3-4 3.2.3 Existing Physical Attribution ................................................................................. 3-4 3.3 FLOW, Pressure & Rainfall (FPR) MONITORING PROGRAM ................................ 3-5 3.3.1 Meter Site Selection and Basin Delineation .......................................................... 3-6 3.3.2 Acceptable Flow Measures and Record Keeping .................................................. 3-6 3.3.3 Duration of Flow Monitoring................................................................................. 3-7 3.3.4 Data Accuracy Specifications ................................................................................ 3-8 3.3.5 Rainfall Monitoring ............................................................................................... 3-9 3.3.6 Groundwater Monitoring ....................................................................................... 3-9 3.3.7 Preliminary Flow, Pressure, and Rainfall (FPR) Monitoring Plan ...................... 3-10 Federal Facility Technical Standards Table of Contents Page TOC-2 3.4 FLOW, PRESSURE, RAINFALL MONITORING IMPLEMENTATION .............. 3-11 3.4.1 Data Collection .................................................................................................... 3-11 3.4.2 Instrument Maintenance ....................................................................................... 3-11 3.4.3 Data Storage Format and Warehousing ............................................................... 3-12 3.5 FLOW, PRESSURE, RAINFALL EVALUATION REPORT (POST-FLOW MONITORING/PRE-REHAB) .................................................................................. 3-12 3.5.1 Data Summaries ................................................................................................... 3-12 3.5.1.1 Graphical Representation of Data ................................................................. 3-12 3.5.1.2 Tabular Data ................................................................................................. 3-12 3.5.2 Installation Report ................................................................................................ 3-14 3.6 SEWER FLOW EVALUATION ................................................................................ 3-14 3.6.1 Data Analysis ....................................................................................................... 3-14 3.6.1.1 Base Sewage Flow ........................................................................................ 3-15 3.6.1.2 Dry Weather Peak Hourly Flow (DWF)....................................................... 3-15 3.6.1.3 Dry Weather Infiltration (DWI) ................................................................... 3-16 3.6.1.4 Rainfall Derived Infiltration/Inflow (RDII) Evaluation ............................... 3-16 SECTION 4 HYDROLOGIC PERFORMANCE ASSESSMENT .................................... 4-1 4.1 MODEL DEVELOPMENT .......................................................................................... 4-1 4.1.1 Physical Data Entry ................................................................................................ 4-1 4.1.2 Sub-basin Delineation and Flow Assignment ........................................................ 4-1 4.1.3 Components of Flow .............................................................................................. 4-1 4.1.3.1 Separation of Base Flow and RDII ................................................................. 4-1 4.1.4 Base Flow Estimates and Projections .................................................................... 4-2 4.1.4.1 Variations in Base Flow ................................................................................. 4-2 4.1.5 Rainfall Derived Infiltration and Inflow Generation ............................................. 4-3 4.1.5.1 Synthetic Unit Hydrograph. ............................................................................ 4-3 4.1.5.2 Hydrologic Methods. ...................................................................................... 4-4 4.2 MODEL DEVELOPMENT PROCESS ........................................................................ 4-4 4.2.1 Model Requirements .............................................................................................. 4-4 4.2.2 Model Development Process ................................................................................. 4-5 4.3 CALIBRATION AND VERIFICATION ..................................................................... 4-5 4.3.1 Calibration.............................................................................................................. 4-5 June 2014 Federal Facility Technical Standards Table of Contents Page TOC-3 4.3.2 Verification ............................................................................................................ 4-7 4.4 LONG TERM FLOW SIMULATIONS ....................................................................... 4-8 4.5 HYDROLOGIC MODEL DEVELOPMENT DOCUMENTATION........................... 4-9 4.5.1 Model Development Documentation ..................................................................... 4-9 4.5.2 Model Verification Documentation ..................................................................... 4-10 SECTION 5 SSES Planning .................................................................................................. 5-1 5.1 SSES BASIN CRITERIA ............................................................................................. 5-1 5.2 SSES PLAN DEVELOPMENT .................................................................................... 5-1 5.2.1 Identification of Areas for Inspection .................................................................... 5-2 5.2.2 SSES Plan Submittal .............................................................................................. 5-2 SECTION 6 CONDITION ASSESSMENT OF SEWERS AND PUMP STATIONS ..... 6-1 6.1 OBJECTIVE .................................................................................................................. 6-1 6.2 ASSESSMENT STANDARDS FOR GRAVITY SEWER SYSTEM ......................... 6-1 6.2.1 National Association of Sewer Service Companies (NASSCO) ........................... 6-1 6.2.1.1 Pipeline Assessment Certification Program (PACP) ..................................... 6-1 6.2.1.2 Manhole Assessment Certification Program (MACP) ................................... 6-1 6.3 DATA NEEDS AND DATA MANAGEMENT .......................................................... 6-2 6.4 FIELD INVESTIGATION APPROACH ..................................................................... 6-4 6.5 PROCEDURES FOR ASSESSMENT ACTIVITIES ................................................... 6-4 6.5.1 Gravity Sewers ....................................................................................................... 6-5 6.5.1.1 Manhole Inspections ....................................................................................... 6-5 6.5.1.2 CCTV Inspections .......................................................................................... 6-6 6.5.1.3 Smoke Testing ................................................................................................ 6-6 6.5.1.4 Dye Testing..................................................................................................... 6-6 6.5.1.5 Night Flow Isolation ....................................................................................... 6-6 6.5.2 Pump Stations .......................................................................................................
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