ClearSpringRanch SolidsHandling&DisposalFacility Masterplan December19,2003 Table of Contents Page No. Executive Summary ............................................................................................................ ES-1 Overview................................................................................................................................................ES-1 Existing Facilities ..................................................................................................................................ES-1 Population, Flow, and Loading Values and Projections .................................................................ES-1 Capacity Evaluation..............................................................................................................................ES-2 Recommended Improvements to the Solids Handling, Treatment, and Disposal System........ES-2 Grease Handling Improvements .................................................................................................ES-3 Raw Sludge Thickening/Centrate Treatment ............................................................................ES-3 Digestion Modifications................................................................................................................ES-5 FSB Expansion...............................................................................................................................ES-5 Improved and Modified DLD System........................................................................................ES-5 Water Management........................................................................................................................ES-6 Implementation of the Preferred System..........................................................................................ES-6 Chapter 1. Background............................................................................................................1-1 Overview...................................................................................................................................................1-1 Purpose of Study......................................................................................................................................1-1 Study Scope...............................................................................................................................................1-1 Existing System ........................................................................................................................................1-2 Blended Sludge Pump Station.........................................................................................................1-2 Sludge Transmission Main...............................................................................................................1-3 Anaerobic Digesters .........................................................................................................................1-3 Facultative Sludge Basins.................................................................................................................1-3 Dedicated Land Disposal.................................................................................................................1-3 Site Water Management ...................................................................................................................1-3 Planning Organization ............................................................................................................................1-4 Chapter 2. Solids Projections ................................................................................................. 2-1 Introduction..............................................................................................................................................2-1 Projections ................................................................................................................................................2-1 Projected Population ........................................................................................................................2-1 Projected Raw Sludge Production ..................................................................................................2-4 Projected Grit and Screenings.........................................................................................................2-8 Projected Scum..................................................................................................................................2-9 Summary................................................................................................................................................. 2-10 P:\Data\GEN\CSpring\23559 - Clear Spring Ranch SHDF Masterplan\FINAL REPORT\Table of Contents.doc i Table of Contents (continued) Page No. Chapter 3. Evaluation of the Capacity of the Existing System and Operations ................... 3-1 Introduction..............................................................................................................................................3-1 Description of Major Process Units .....................................................................................................3-1 Blended Sludge Pump Station.........................................................................................................3-1 Sludge Main........................................................................................................................................3-1 Anaerobic Digesters .........................................................................................................................3-1 Facultative Sludge Basins (FSBs) ....................................................................................................3-2 Dedicated Land Disposal (DLD) System......................................................................................3-2 Supernatant Handling System .........................................................................................................3-3 Process Design Criteria and Performance ...........................................................................................3-3 Projected Capacity ...................................................................................................................................3-6 Blended Sludge Pump Station.........................................................................................................3-6 Anaerobic Digester...........................................................................................................................3-7 Facultative Sludge Basins.................................................................................................................3-9 Dedicated Land Disposal (DLD) ................................................................................................ 3-10 Capacity Summary.......................................................................................................................... 3-11 Chapter 4. Existing and Potential Future Regulatory Requirements ................................... 4-1 Overview...................................................................................................................................................4-1 Air Quality Requirements.......................................................................................................................4-1 Endangered Species Act .........................................................................................................................4-4 State Sensitive Species ......................................................................................................................4-7 Biosolids Disposal and Utilization Issues.......................................................................................... 4-10 Federal Sludge Regulation Requirements (40 CFR, Part 503) and Current Sludge (Biosolids) Characteristics................................................................................................................................. 4-10 Metal Concentrations of Biosolids .............................................................................................. 4-13 Site Restrictions/Management Practices for Class A or B Biosolids (503.14)...................... 4-14 Class B Additional Site Restrictions for Cropland.................................................................... 4-14 Monitoring Requirements for Sludge Application.................................................................... 4-15 Record Keeping and Reporting ................................................................................................... 4-15 Other Considerations for Class A or B Biosolids Application ............................................... 4-15 Future Regulatory Considerations............................................................................................... 4-16 State, Regional, and Local Regulations.............................................................................................. 4-16 State Regulations............................................................................................................................ 4-16 Regional Regulations ..................................................................................................................... 4-17 P:\Data\GEN\CSpring\23559 - Clear Spring Ranch SHDF Masterplan\FINAL REPORT\Table of Contents.doc ii