C3 Guidance Table

For a complete copy of the C3 Technical Guidance Manual

2022 Interim Update

For a summary of the Revisions in the 2021 and 2019 Versions see the 

Summary of Revisions


See table below to download specific sections of the Manual. 

Chapter/ Appendix Title Format File Size Last Updated
  Cover/Contents/Glossary PDF 645 KB Feb-2021
Chapter 1 Introduction/How to Use this Handbook PDF 264 KB Sept-19
Chapter 2 Background/Regulatory Requirements PDF 532 KB Sept-19
Chapter 3 Preparing Permit Application Submittals PDF 962 KB Feb-2021
Chapter 4 Site Design Measures
PDF 933 KB Feb-2021
Chapter 5 General Technical Guidance for Treatment Measures PDF 1.47 MB Feb-2021
Chapter 6 Technical Guidance for Specific Treatment Measures PDF 4.21 MB Sept-19
Chapter 7 Hydromodification Management Measures PDF 584 KB Feb-2021
Chapter 8 Operation and Maintenance PDF 935 KB Sept-19
Chapter 9 Alternative Compliance PDF 176 KB Sept-19
  References PDF 22 KB Sept-19
Appendix A Local Requirements PDF 13 KB Sept-19
Appendix B Plant List and Planting Guidance PDF 877 KB Sept-19
Appendix C Example Scenarios PDF 200 KB Sept-19
  Worksheet: Volume-Based Sizing Excel 1 MB Feb-14
  Worksheet: Combo Flow/Volume Sizing Excel 1 MB Feb-14
Appendix D Mean Annual Precipitation Map PDF 330 KB Sept-19
Appendix E Non-LID Treatment Measures PDF 108 KB Sept-19
Appendix F Infiltration Guidelines PDF 978 KB Sept-19
Appendix G Mosquito Control PDF 553 KB Sept-19
Appendix H Operation and Maintenance (O&M) Document Templates (Intro)  PDF  80 KB Sept-19
  O&M Standard Property Owner Report Word 46 KB Dec-11
  How to Use Maintenance Plan Templates PDF 25 KB Oct-17
  6.1: Bioretention Area Maintenance Plan Template Word 79 KB Sept-19
6.2: Flow-through Planter Maintenance Plan Template Word 77 KB Sept-19
6.3: Tree Well Filter Maintenance Plan Template Word 69 KB Sept-19
6.4: Infiltration Trench Maintenance Plan Template Word 66 KB Sept-19
6.5: Extended Detention Basin Maintenance Plan Template Word 81 KB Sept-19
6.6: Pervious Paving Maintenance Plan Template Word 63 KB Sept-19
6.10: Media Filter Maintenance Plan Template Word 51 KB Sept-19
Appendix I Hydromodification Management Susceptibility Map PDF 1.8 MB Sept-19
Appendix J Special Projects PDF 118 KB Sept-19
  Special Projects Narrative Template Word 21 KB Sept-19
Appendix K Soil Specifications (Introduction, Specification, and Water Board Letter)
PDF 464 KB Sept-19
  Biotreatment Soil Mix Specification Verification Checklist Form PDF (fillable) 282 KB Sept-19
  Biotreatment Soil Mix Supplier List PDF 371 KB Sept-19
  Biotreatment Soil Mix Supplier Certification Statement Form Word 26 KB Sept-19
  Bioretention Installation Guidance  PDF 46 KB Nov-10
Appendix L Site Design Requirements for Small Projects PDF 246 KB Sept-19
Appendix M Green Streets PDF 2.4 MB Sept-19

Green Infrastructure Example Typical Details


2.4 MB
6.2 MB

Appendix N Rainwater Harvesting and Use PDF 586 KB Sept-19