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Stormwater Quality Design Manual

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Stormwater Quality Design Manual Sacramento Region STORMWATER QUALITY DESIGN MANUAL Integrated Design Solutions for Urban Development Protecting Our Water Quality City of Citrus Heights City of Rancho Cordova City of Elk Grove City of Sacramento City of Folsom County of Sacramento City of Galt July 2018 THIS PAGE LEFT INTENTIONALLY BLANK Table of Contents List of Tables ........................................................................................................................... vii List of Figures .......................................................................................................................... ix List of Appendices ................................................................................................................... xi Acknowledgements ............................................................................................................... xiii Steering Committee ............................................................................................................................... xiii Project Consultants ................................................................................................................................ xiii Document Design and Production ........................................................................................................ xiii Other Development Community Reviewers and Contributors ........................................................... xiv Agency Reviewers and Contributors .................................................................................................... xiv Disclaimer ...............................................................................................................................xv Glossary ................................................................................................................................ xvii Chapter 1. Introduction ..................................................................................................... 1-1 Purpose .................................................................................................................................................... 1-1 Goals ........................................................................................................................................................ 1-1 Background Information ....................................................................................................................... 1-2 Sacramento Areawide Stormwater Permit Requirements ............................................................. 1-2 Agency Collaboration in Developing this Manual ............................................................................ 1-3 Using the Manual ................................................................................................................................... 1-3 Intended Audience ............................................................................................................................ 1-3 Projects Covered by the Manual ....................................................................................................... 1-4 How the Manual is Organized ........................................................................................................... 1-6 Stormwater Management Information Not in this Manual ............................................................ 1-7 Obtaining the Manual and Updates ................................................................................................. 1-8 Questions and Comments ................................................................................................................. 1-8 Chapter 2. Integrated Approach to Stormwater Management ......................................... 2-1 Integrated Planning and Design Approach .......................................................................................... 2-1 Benefits of the Integrated Approach .................................................................................................... 2-1 Benefits to the Property Owner/Developer ..................................................................................... 2-1 Environmental Benefits ..................................................................................................................... 2-1 Stormwater Quality Design Manual for the Sacramento Region July 2018 Page i Table of Contents Community Benefits .......................................................................................................................... 2-2 Strategies for Effectively Integrating Stormwater Quality Management into Project Design ......... 2-2 Assemble a Collaborative Team Early ............................................................................................... 2-2 Consider the Site and its Surroundings ............................................................................................ 2-3 Identify Opportunities and Constraints ........................................................................................... 2-3 Preserve Valuable Site Features .......................................................................................................2-4 Lay Out the Site with Topography and Soils in Mind.......................................................................2-4 Put Landscaping to Work .................................................................................................................. 2-5 Stop Pollution at Its Source .............................................................................................................. 2-5 Reduce Runoff Close to Its Source ................................................................................................... 2-5 Treat Runoff ....................................................................................................................................... 2-7 Hydromodification Management ..................................................................................................... 2-7 References .............................................................................................................................................. 2-7 Additional Resources ............................................................................................................................ 2-8 Chapter 3. Steps to Managing Stormwater Quality ...........................................................3-1 Step 1. Gather Project and Site Information ......................................................................................... 3-1 Step 2. Determine Requirements .......................................................................................................... 3-3 Step 3. Evaluate Best Approach to Protect Stormwater Quality ....................................................... 3-9 Step 4. Select Source Control Measures (Chapter 4) ......................................................................... 3-9 Step 5. Select Hydromodification Control Measures (Chapter 5) ..................................................... 3-10 Step 6. Select Low Impact Development Measures (Chapter 5) ...................................................... 3-10 Step 7. Select Treatment Control Measures (Chapter 5) .................................................................... 3-11 Step 8. Design Facilities (Preliminary) ................................................................................................. 3-12 Step 9. Design Facilities (Final) ............................................................................................................ 3-12 Step 10. Establish Long Term Maintenance Requirements ............................................................... 3-13 Step 11. Construct ................................................................................................................................. 3-13 Chapter 4. Source Control Measures ................................................................................. 4-1 Source Control Principles ...................................................................................................................... 4-1 Selecting Source Control Measures for Your Project ..........................................................................4-2 Source Control Fact Sheets ...................................................................................................................4-2 References ..............................................................................................................................................4-2 Fact Sheets: Page ii Stormwater Quality Design Manual for the Sacramento Region July 2018 Table of Contents Efficient Irrigation............................................................................... ............................................. EI-1 Fueling Areas .................................................................................................................................. FA-1 Landscaping ...................................................................................................................................... L-1 Loading Areas ................................................................................................................................. LA-1 Outdoor Storage Areas ................................................................................................................. OS-1 Outdoor Work Areas ...................................................................................................................
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