Technical Guidance Manual for Stormwater Quality Measures - New Development and Redevelopment Projects (TGM)

This page is to communicate information on the revisions to Technical Guidance Manual for Stormwater Control Measures. If you would like to be notified by email when this page is updated, please send a request to This email address is being protected from spambots. You need JavaScript enabled to view it. with "TGM Stakeholder Email" in the subject line.

TGM Errata May 2015 Cover Page

[NEW] TGM Errata Update 2015 Version
The 2011 TGM was updated in 2015 to correct minor errors and unintentional omissions. Due to the evolving nature of stormwater quality management, the 2011 TGM may continue to be updated to correct errors, to incorporate new and innovative control measures, or to add the Hydromodification Control Plan.
Errata TGM (May 2015)
Errata Comments

The Technical Guidance Manual was approved by the Executive Officer of the LA Regional Board on July 13, 2011. The new rules became effective on October 11, 2011. For more information on how the effective date applies to projects see page 1-8 of the TGM.

Final 2011 Technical Guidance Manual (July 2011)
An electronic tool to assist land development project applicants in meeting the new LID requirements under the new Permit. [To ensure you use the correct version of this tool always check with the agency that has jurisdiction over your project before starting. Links are provided at the bottom of this page.]
Ventura Stormwater Permit LID Alternative Compliance Stakeholder Meeting Announcement
July 13, 2011 Approval Letter from Regional Board

Training Materials from June 21st, 2011, Seminar
Morning Presentation (June 2011)
Afternoon Presentation (June 2011)
Flow Charts (June 2011)

Hydromodification Control Plan - Final Draft
This final draft of the Hydromodification Control Plan was submitted to the Regional Board on September 26, 2013, and will become effective upon the Executive Officer's approval.
[Cover Letter] [Final Draft - note: may be slow to load due to large file size]

Draft Hydromodification Control Plan Stakeholder Meeting
The Ventura County Stormwater Quality Management Program (VCSQMP) hosted a stakeholder meeting on July 30th, 2013, at the Ventura County Government Center to present and discuss the draft Hydromodification Control Plan.
[Flyer] [Directions] [Agenda] [NEW Presentation]

Draft Hydromodification Control Plan Comments

►VCSQMP Response to Comments (September 2013)

►Comment Letter - Contech (August 2013)
►Comment Letter - Heal the Bay (August 2013)
►Comment Letter - Jackson, DeMarco, Tidus & Peckenpaugh (August 2013)
►Comment Letter - NextGen Engineering (August 2013)

Related Documents
Final Technical Guidance Manual unapproved (November 2010)
Transmittal letter to Regional Board (November 2010)
Summary of comments and changes (November 2010)
Effective date language (October 2010)
Comment Letter - Calleguas Municipal Water District (October 2010)
Comment Letter - City of Ventura (October 2010)
Comment Letter - Contech (October 2010)
Comment Letter - Jackson, DeMarco, Tidus & Peckenpaugh (October 2010)
Comment Letter - Jensen Design (October 2010)
Comment Letter - Natural Resources Defense Council & Heal the Bay (October 2010)
Comment Letter - Paul Crabtree (October 2010)
Comment Letters Summary (October 2010)
Presentation - Rebecca Winer-Skonovd - TGM Revision, Step-by-Step Process (September 2010)
Presentation - Lisa Austin - Land Development TGM Revisions (September 2010)
Ventura County TGM for Stormwater Quality Control Measures (September 2010)
Ventura County Technical Guidance Manual for Stormwater Quality Control Measures (May 2010)
Presentation - Meeting Purpose and Objectives (January 2010)
Presentation - Lisa Austin, Geosytnec Consultants (January 2010)
Presentation - Rebecca Winer-Skonovd, Larry Walker Associates (January 2010)
Meeting agenda (January 2010)
Draft process flow chart (January 2010)
Draft alternative compliance flow chart (January 2010)
Draft outline of Technical Guidance Manual (January 2010)


Technical Guidance Manual (July 2002) - Applicable only to projects with applications deemed complete prior to the updated rule in 2011.

Main Report (includes page updates)