New Development

Post Construction Stormwater Controls:
Reduce Pollutants from New Development:

Urban development is a major contributor to stormwater-caused pollution. Development or redevelopment of property represents an opportunity to incorporate post-construction controls that can reduce water quality impacts over the life of the project. Since the first countywide municipal stormwater permit was adopted in 1993, the Countywide Program's member municipalities have required new development and redevelopment projects to incorporate post-construction stormwater site design, source control, and treatment measures in their projects to the maximum extent practicable (MEP). To meet the MEP standard, municipalities must employ stormwater control measures that are technically feasible (that is, are likely to be effective) and are not cost prohibitive.

C.3 Stormwater Technical Guidance

The handbook C.3 Stormwater Technical Guidancewas designed to help developers, builders, and project sponsors include post-construction stormwater controls in their projects, in order to meet local municipal requirements that reduce the long term impacts of development on stormwater quality and creek channels.

This handbook can be downloaded above as a complete document or by chapters and appendices using the Table of Contents provided below. When using this countywide guidance document, please keep in mind that some requirements may vary from one local jurisdiction to the next. In the very early stages of project planning, contact the local permitting agency to schedule a pre-application meeting to learn how the C.3 requirements will apply to your project.

TABLE OF CONTENTS

Chapter/ Appendix No.

Section

Title

File Size

Last Updated

    Cover Page   12/05/07

 

 

Errata Sheet

24 KB

2/04/08

    Local Contacts and Credits   12/5/07
    Table of Contents   3/20/07

Chapter 1

 

Introduction/How to Use this Handbook

408 KB

3/20/07

Chapter 2

 

Background/Regulatory Requirements

773 KB

3/20/07

Chapter 3

 

Preparing Permit Application Submittals

1.1 MB

3/20/07

Chapter 4

 

Site Design Measures

3.3 MB

3/20/07

 

4.6

Green Roof Technical Guidance

601 KB

3/20/07

   

4.7

Pervious Paving Technical Guidance

598 KB

3/20/07

 

4.8

Turf Block and Permeable Joint Pavers Technical Guidance

1.9 MB

3/20/07

 

4.9

Combining Pervious Pavement with Stormwater Treatment

617 KB

3/20/07

Chapter 5

 

General Technical Guidance for Treatment Measures

856 KB

3/20/07

Chapter 6

 

Technical Guidance for Specific Treatment Measures

3.27 MB

3/20/07

  

6.1

Vegetated Swale Technical Guidance

1.35 MB

3/20/07

  

6.2

Vegetated Buffer Strip Technical Guidance

597 KB

3/20/07

  

6.3

Tree Well Filter Technical Guidance

642 KB

3/20/07

 

6.4

Media Filter Technical Guidance

560 KB

3/20/07

 

6.5

Flow-Through Planter Box Technical Guidance

612 KB

3/20/07

   

6.6

Bioretention Area Technical Guidance

608 KB

3/20/07

 

6.7

Infiltration Trench Technical Guidance

761 KB

3/20/07

 

6.8

Extended Detention Basin Technical Guidance

671 KB

3/20/07

Chapter 7

 

Hydromodification Management Measures

888 KB

3/20/07

Chapter 8

 

Operation and Maintenance

1.05 KB

3/20/07

Appendix A

 

Index of Internet Links

308 KB

3/20/07

Appendix B

 

Plant List and Planting Guidance for Landscaped-Based Treatment Measures

654 KB

3/20/07

Appendix C

 

Example Development Scenarios

2.25 MB

3/20/07

Appendix D

 

Local Requirements

282 KB

3/20/07

Appendix E

  

Treatment Measure Design Criteria Regions for San Mateo County

315 KB

3/20/07

Appendix F

   

Applicability of Inlet Filters, Oil/Water Separators and Hydrodynamic Separators

453 KB

3/20/07

Appendix G

   

Infiltration Guidelines

497 KB

3/20/07

Appendix H

   

Mosquito Control Guidelines

388 KB

3/20/07

Appendix I

  

Introduction [pdf file]

26 KB

12/05/07

 

 

Stormwater Treatment Measure
O&M Inspection Report Template
[Word file]

36 KB

03/20/07

 

 

Vegetated Swale Maintenance Plan Template [Word file]

444 KB

12/05/07

 

 

Vegetated Buffer Strip Maintenance Plan Template [Word file]

309 KB

12/05/07

 

 

Tree Well Filter Maintenance Plan Template [Word file]

221 KB

12/05/07

 

 

Non-proprietary Media Filter Maintenance Plan Template [Word file]

205 KB

12/05/07

 

 

Flow-trhough Planter Maintenance Plan Template [Word file]

409 KB

12/05/07

 

 

Bioretention Area Maintenance Plan Template [Word file]

359 KB

12/05/07

 

 

Infiltration Trench Maintenance Plan Template [Word file]

1,621 KB

12/05/07

 

 

Extended Detention Basin Maintenance Plan Template [Word file]

465 KB

12/05/07

 

 

Manufactured Stormwater Treatment Measure Maintenance Plan Template [Word file]

53 KB

12/05/07

Appendix J

   

Areas Exempt from Hydromodification Management Requirements

653 KB

3/20/07

[back to top]

Stormwater Requirements for New Development/Redevelopment


Stormwater Quality Requirements for Developers, Builders and Project Applicants [pdf]


Stormwater Detention Requirements for Developers, Builders and Project Applicants [pdf]


Operation and Maintenance Information for Stormwater Treatment Measures-Updated Nov2007[word]


NPDES Permit Impervious Surface Data Collection Worksheet-Updated November 2007 [word]


Checklist for NPDES Permit Requirements- Updated November 2007[word]


Hydromodification Management Plan (HMP) [pdf]


Map of Areas Exempt from Hydromodification Management Requirements [643 KB]


Link for downloading the Bay Area Hydrology Model software and users manual


Treatment Control Design Guidance for Mosquito Control[pdf]


Treatment Control Operation & Maintenance Guidance for Mosquito Control [pdf]


Source Control Model List [word]


NewSoil Guidelines for Stormwater Treatment Measures [pdf]


Additional Information


CASQA Handbook http://www.cabmphandbooks.com/Development.asp