Los Angeles County MS4 Permit

New! Modification of the Los Angeles County MS4 Permit Attachment E

• Letter of Modification to MRP for Bacteria
• Attachment E (modified July 9, 2018)

AMENDMENT OF LOS ANGELES COUNTY MS4 PERMIT (POSTED NOVEMBER 23, 2016)

• Transmittal Letter
• Order No. R4-2012-0175-A01
• Complete Amended Permit
• Amended Sections
• Final Order No. R4-2012-0175 as amended by R4-2012-0175-A01
• Attachment E - MRP as amended by R4-2012-0175-A01
• Attachment F - Fact Sheet as amended by R4-2012-0175-A01
• Attachment K as amended by R4-2012-0175-A01
• Attachment O as amended by R4-2012-0175-A01

Tentative Approval of the City of Santa Monica's Request for LID Ordinance Equivalency (posted October 5, 2015)

• Tentative Approval

LOS ANGELES COUNTY MS4 PERMIT (ORDER NO. R4-2012-0175) AS AMENDED BY THE STATE WATER BOARD ON JUNE 16, 2015 BY ORDER WQ 2015-0075 (posted July 1, 2015)

• Transmittal Letter for Amended LA County MS4 Permit
• Final State Water Board Order WQ 2015-0075
• Complete Amended Permit
• Amended Sections
• Final LA County MS4 Permit (Order No. R4-2012-0175) as amended by State Water Board Order WQ 2015-0075
• Attachment F - Fact Sheet as amended by State Water Board Order WQ 2015-0075

Time Schedule Order No. R4-2015-0108 requiring the City of Los Angeles, the County of Los Angeles, the Los Angeles County Flood Control District, the City of Beverly Hills, the City of Culver City, the City of Inglewood, and the City of West Hollywood to comply with requirements prescribed in Order No. R4-2012-0175 (NPDES Permit No. CAS004001)

• Transmittal Letter for TSO R4-2015-0108 (posted May 21, 2015)
• Final Time Schedule Order R4-2015-0108 (posted May 21, 2015)

Time Schedule Order No. R4-2014-0142 Requiring the County of Los Angeles, the Los Angeles County Flood Control District and the City of Los Angeles to Comply With Requirements Pertaining to Discharges of Bacteria During Dry Weather to the Back Basins of Marina Del Rey Harbor and Marina Beach Prescribed in Order No. R4-2012-0175 (NPDES Permit NO. CAS004001)

• Transmittal Letter for TSO R4-2014-0142 (posted July 15, 2014)
• Final Time Schedule Order R4-2014-0142 (posted July 15, 2014)

Time Schedule Order No. R4-2014-0023 Requiring the City of Los Angeles (Inner Cabrillo Beach, Los Angeles Harbor) To Comply With Requirements Prescribed in Order No. R4-2012-0175 (NPDES Permit No. CAS004001)

• Transmittal Letter for TSO R4-2014-0023
• Final Time Schedule Order R4-2014-0023

LARWQCB Response to Petitions A-2236(a) through (kk)

Administrative Record for Order No. R4-2012-0175 (Note: Some of the files are large. Please be patient when opening the files; it may take a moment.)

Implementation of the Los Angeles County Areawide MS4 Permit

• Watershed Management Programs
  • NRDC, Heal the Bay, and LA Waterkeeper Comments on Revised WMPs
• Low Impact Development Ordinances and Green Streets Policies
• Implementation Information Session #1 (February 19, 2013) Watershed Management Programs/Enhanced Watershed Management Programs
• Implementation Information Session #2 (April 16, 2013) Monitoring Requirements and IMPs and CIMPs
• Implementation Information Session #3 (June 12, 2013) First Year Reporting Requirements

Final Waste Discharge Requirements for Municipal Separate Storm Sewer System (MS4) Discharges within the Coastal Watersheds of Los Angeles County, Except Those Discharges Originating from the City of Long Beach MS4 (posted December 5, 2012)

• Transmittal Memorandum
• Final Order No. R4-2012-0175 (Reposted December 10, 2012)
Note: Incorrect numbering within Order No. R4-2012-0175 at Parts VI.A.7 and VI.A.13 were identified by a permittee; this typographical error has been corrected pursuant to 40 CFR section 122.63(a). Pages 42 through 46 have been updated with this correction.

List of Attachments

• Attachment A - Definitions
• Attachment B - Watershed Management Area Maps
• Attachment C - MS4 Maps by Watershed Management Area
• Attachment D - Standard Provisions
• Attachment E - Monitoring and Reporting Program
• Attachment F - Fact Sheet
• Attachment G - Non-Storm Water Action Levels
• Attachment H - Bioretention / Biofiltration Design Criteria
• Attachment I - Developer Technical Information and Guidelines
• Attachment J - Determination of Erosion Potential
• Attachment K - Permittees and TMDLs Matrix
• Attachment L - TMDL Provisions for Santa Clara River Watershed Management Area
• Attachment M - TMDL Provisions for Santa Monica Bay Watershed Management Area (including Malibu Creek, Ballona Creek, and Marina del Rey subwatersheds)
• Attachment N - TMDL Provisions for Dominguez Channel and Greater Harbor Waters Watershed Management Area (including Machado Lake subwatershed)
• Attachment O - TMDL Provisions for Los Angeles River Watershed Management Area
• Attachment P - TMDL Provisions for San Gabriel River Watershed Management Area
• Attachment Q - TMDL Provisions for Los Cerritos Channel and Alamitos Bay Watershed Management Area
• Attachment R - TMDL Provisions for Middle Santa Ana River Watershed Management Area

• Order of Objections Regarding Revised Tentative Order and Responses to Comments
• Order of Proceedings for the Public Hearing on the Los Angeles Tentative County MS4 Permit on November 8, 2012

Second (2nd) Revised Tentative Waste Discharge Requirements for Municipal Separate Storm Sewer System (MS4) Discharges within the Coastal Watersheds of the County of Los Angeles, Except Those Discharges Originating from the City of Long Beach (posted November 5, 2012).

• Transmittal Memorandum
• Tentative Order No. R4-2012-XXX

List of Attachments that have been revised

• Attachment A - Definitions
• Attachment E - Monitoring and Reporting Program
• Attachment F - Fact Sheet
• Attachment G - Non-Storm Water Action Levels
• Attachment K - Permittees and TMDLs Matrix
• Attachment M - TMDL Provisions for Santa Monica Bay Watershed Management Area (including Malibu Creek, Ballona Creek, and Marina del Rey subwatersheds)
• Attachment N - TMDL Provisions for Dominguez Channel and Greater Harbor Waters Watershed Management Area (including Machado Lake subwatershed)
• Attachment R - TMDL Provisions for Middle Santa Ana River Watershed Management Area

Response to Comments on the June 6, 2012, draft of the Tentative Waste Discharge Requirements for Municipal Separate Storm Sewer System (MS4) Discharges within the Coastal Watersheds of Los Angeles County, Except Those Discharges Originating from the City of Long Beach (posted October 23, 2012)

1. Non-Stormwater Discharges Matrix
2. Receiving Water Limitations Matrix
3. Monitoring and Reporting Program Matrix
4. Watershed Management Program Matrix
5. Minimum Control Measures Matrix
6. Total Maximum Daily Loads (General) Matrix
7. Total Maximum Daily Loads (Specific) Matrix
8. General and Miscellaneous Matrix
9. Supplemental MCM Matrix (posted November 6, 2012)
10. USEPA Comment Matrix (posted November 6, 2012)

Revised Tentative Waste Discharge Requirements For Municipal Separate Storm Sewer System (MS4) Discharges Within The Coastal Watersheds Of The County Of Los Angeles, Except Those Discharges Originating From The City Of Long Beach (posted October 18, 2012)

• Notice of Opportunity for Public Comment and Notice of Adoption Meeting
• Tentative Order No. R4-2012-XXX

List of Attachments

• Attachment A - Definitions
• Attachment B - Maps
• Attachment C - MS4 Maps by Watershed Management Area
• Attachment D - Standard Provisions
• Attachment E - Monitoring and Reporting Program
• Attachment F - Fact Sheet
• Attachment G - Non-Storm Water Action Levels
• Attachment H - Bioretention/Biofiltration Design Criteria
• Attachment I - Developer Technical Information and Guidelines
• Attachment J - Determination of Erosion Potential
• Attachment K - Permittees and TMDLs Matrix
• Attachment L - TMDL Provisions for Santa Clara River Watershed Management Area
• Attachment M - TMDL Provisions for Santa Monica Bay Watershed Management Area (including Malibu Creek, Ballona Creek, and Marina del Rey subwatersheds)
• Attachment N - TMDL Provisions for Dominguez Channel and Greater Harbor Waters Watershed Management Area (including Machado Lake subwatershed)
• Attachment O - TMDL Provisions for Los Angeles River Watershed Management Area
• Attachment P - TMDL Provisions for San Gabriel River Watershed Management Area
• Attachment Q - TMDL Provisions for Los Cerritos Channel and Alamitos Bay Watershed Management Area
• Attachment R - TMDL Provisions for Middle Santa Ana River Watershed Management Area
  
• Attachments K-R combined

October 4-5, 2012 Public Hearing on Tentative LA County MS4 Permit

• Order of Proceedings for the Public Hearing on the Tentative LA County MS4 Permit on October 4-5, 2012
• Order on Objections and Requests Concerning Hearing Procedures and Process
• Agenda for the Board meeting on October 4-5, 2012

• Notice Of Change To Date Of Board Hearing On The Tentative National Pollutant Discharge Elimination System (NPDES) Permit For Municipal Separate Storm Sewer System (MS4)

Technical Comments on the June 6, 2012, draft of the Tentative Waste Discharge Requirements for Municipal Separate Storm Sewer System (MS4) Discharges within the County of Los Angeles Flood Control District, Including the County of Los Angeles and Incorporated Cities therein, except the City of Long Beach. All comments received by July 23, 2012, are included in the following groups: (Updated August 7, 2012)

• Academia
• Building Industry
• Environmental Agencies
• Fire Deparments
• Non-Permittees
• Other Entities
• Permittees (may take a moment to open 77 MB)
• USEPA
• Vector Control Agencies
• Water Suppliers
• West Hollywood (Posted 10/11/12)

Tentative Waste Discharge Requirements For Municipal Separate Storm Sewer System (MS4) Discharges Within The County Of Los Angeles Flood Control District, Including The County of Los Angeles and Incorporated Cities Therein, Except The City Of Long Beach (posted June 6, 2012)

• Notice of Special Meeting-Board Member Field tour of Portions of the LA County MS4
• Tour itinerary and directions
• Notice of Staff Level Public Workshop on July 9, 2012 (posted on June 19, 2012)
• Memo Dated June 19, 2012 to Correct Attachments F and G (posted on June 19, 2012)
• Notice of Public Hearing
• Tentative Order No. R4-2012-XXX

List of Attachments

• Attachment A - Definitions
• Attachment B - Maps
• Attachment C - MS4 Maps by Watershed Management Area
• Attachment D - Standard Provisions
• Attachment E - Monitoring and Reporting Program
• Attachment F - Fact Sheet (Revised on June 19, 2012)
• Attachment G - Non-Storm Water Action Levels (Revised on June 19, 2012)
• Attachment H - Bioretention/Biofiltration Design Criteria
• Attachment I - Developer Technical Information and Guidelines
• Attachment J - Determination of Erosion Potential
• Attachment K - Permittees and TMDLs Matrix
• Attachment L - TMDL Provisions for Santa Clara River Watershed Management Area
• Attachment M - TMDL Provisions for Santa Monica Bay Watershed Management Area (including Malibu Creek, Ballona Creek, and Marina del Rey subwatersheds)
• Attachment N - TMDL Provisions for Dominguez Channel and Greater Harbor Waters Watershed Management Area (including Machado Lake subwatershed)
• Attachment O - TMDL Provisions for Los Angeles River Watershed Management Area
• Attachment P - TMDL Provisions for San Gabriel River Watershed Management Area
• Attachment Q - TMDL Provisions for Los Cerritos Channel and Alamitos Bay Watershed Management Area
• Attachment R - TMDL Provisions for Middle Santa Ana River Watershed Management Area


• Attachments K-R combined



Indexes

• 2012 LA MS4 Administrative Record Index
• 2001 LA MS4 Administrative Record Index
• Marina Del Rey Bacteria TMDL Administrative Record Index
• Los Angeles River Trash TMDL Administrative Record Index
• 2010 Ventura MS4 Administrative Record Index

May 3, 2012 Board Workshop

• Staff Presentation from May 3, 2012 Board Workshop

Staff Working Proposals for LA County MS4 Permit Reissuance

1. Transmittal Memo for Working Proposals
1. Working Proposal of Watershed Management Program Provisions
2. Working Proposal of TMDL Provisions
   • Permittees and TMDLs Matrix
   • TMDLs Provisions for Santa Clara River WMA
   • TMDLs Provisions for Santa Monica Bay WMA
   • TMDLs Provisions for Dominguez Channels and Harbors WMA
   • TMDLs Provisions for Los Angeles River WMA (Updated 4-24-12)
   • TMDLs Provisions for San Gabriel River WMA (Updated 4-24-12)
   • TMDLs Provisions for Los Cerritos Channel WMA
   • TMDLs Provisions for Santa Ana River WMA
   • List of TMDLs by Watershed Management Area
3. Working Proposal of Receiving Water Limitation Provisions

April 5, 2012 Board Workshop

• Staff Presentation on Non-Stormwater Discharges from April 5, 2012 Board Workshop
• Staff Presentation on Minimum Control Measures from April 5, 2012 Board Workshop

• Minimum Control Measures ("MCMs")
• Transmittal Memo for MCMs
• Staff Working Proposal for Provisions Regarding Minimum Control Measures


• Non-Stormwater Discharges
• Transmittal Memo for Non-Stormwater Discharges
• Staff Working Proposal for Provisions Regarding Non-Stormwater Discharges

• March 1, 2012 Workshop
• Notice of Public Workshop
  
• Staff Presentations
• Water Quality Based Effluent Limitations (WQBEL)
• Minimum Control Measures (MCM)
• Monitoring

• November 10, 2011 Board Workshop Materials
  • Memorandum to Board Regarding Key Issues Raised by Stakeholders Regarding the Reissuance of the Los Angeles County MS4 Permit
  • November 10, 2011 Staff Presentation
  • Public Notice of Board Workshop
  • MS4 Status and Development
  • Attachment A - SurveyMonkey® on-line survey
  • Attachment B - TMDLs by Watershed Management Area
  • Attachment C - Permittees by Watershed Management Area
  • Attachment D - Permittees by AB 2554-defined Watershed Authority Group - DRAFT
  • Attachment E - Summary on-line survey results
  • Attachment F - Preliminary recommendations regarding SWMP permit requirements
• Summary of Survey Results on Los Angeles County MS4 Permit Structure


• Public Notice of MS4 Kick-Off Meeting (posted April 20, 2011)
• Kick-off Meeting Presentation (posted May 26, 2011)
• LA County MS4 Permit - Order No. 01-182 as amended on April 14, 2011
• Transmittal Letter to LA County MS4 Co-Permittees and Interested Persons
• Final Order No. 01-182 as amended on April 14, 2011


• Public Notice to Void and Set Aside 2006 Amendment to Order No. 01-182 (posted Feb 10, 2011)
• Comments and Response to Comments
• Public Notice to Void and Set Aside 2006 Amendment (pursuant to L.A. Superior Court Case No. BS122724)
• Tentative Order No. 01-182 as amended pursuant to the peremptory writ of mandate in L.A. Superior Court Case No. BS122724
• TENTATIVE WASTE DISCHARGE REQUIREMENTS FOR
  MUNICIPAL SEPARATE STORM SEWER SYSTEM (MS4) DISCHARGES WITHIN THE COUNTY OF LOS ANGELES, AND THE INCORPORATED CITIES THEREIN, EXCEPT THE CITY OF LONG BEACH (posted January 31, 2011)
  • NOTICE OF CANCELLATION OF REISSUANCE OF MS4 NPDES PERMIT SCHEDULED FOR APRIL 14, 2011 BOARD HEARING
  • NOTICE OF PUBLIC HEARING
  • TENTATIVE ORDER NO. R4-2011-XXX
    ATTACHMENT A
    ATTACHMENT B
    APPENDIX 7-1
    APPENDIX 7-2
    APPENDIX 7-3
  • TENTATIVE MONITORING AND REPORTING PROGRAM FOR ORDER NO. R4-2011-XXX
    ATTACHMENT U-1
    ATTACHMENT U-2
    ATTACHMENT U-3
    ATTACHMENT U-4
  • TENTATIVE FACT SHEET
  • ADMINISTRATIVE RECORD INDEX
• Order No. 01-182 as amended pursuant to the peremptory writ of mandate in L.A. Superior Court Case No. BS122724 (posted Oct 19, 2010)
  
  
• Strikeout Version of Order No. 01-182 as amended pursuant to the peremptory writ of mandate in L.A. Superior Court Case No. BS122724 (posted Oct 19, 2010)
  
  
• LA County MS4 Permit - Trash TMDL Compliance Reporting Forms (posted Sep 09, 2010)
• Letter to Permittees regarding Compliance Reporting forms (posted Sep 09, 2010)
• Trash TMDL Compliance Reporting Forms (Corrected Oct 19, 2010)
  
  
• Best Management Practices (BMPs) Certification:
  • Procedures and Requirements for Certification of a BMP for Trash Control as a Full Capture System
    
• LA County MS4 Permit - Final Documents (posted Jan 21, 2010)
  
  • Letter to Los Angeles County MS4 Permittess subject to the Los Angeles River Watershed Trash TMDL Provisions
  • Permit (Order No. 01-182 as amended by R4-2009-0130)
    • Appendix 7-1
    • Appendix 7-2
      
      
• LA County MS4 Permit - Re-opener to Incorporate Provisions Consistent with the Assumptions and Requirements of the Los Angeles River Watershed Trash TMDL (posted on October 8, 2009)
  
  • Hearing Notice
  • Permit Findings
  • Permit Provisions Part I
  • Permit Provisions Part II
    
  • Permit Provisions Appendix 7-1
    
  • Permit Provisions Appendix 7-2
    
  • Fact Sheet
    
  • Administrative Record Index (revised on Dec 03, 2009).
  • Order on Party Status (posted on Oct, 26 2009)
  • Amendment to the Order on Party Status (posted on Oct 27, 2009)
  • Order on Requests for Additional Evidence (posted on Dec 03, 2009).
  • Response to Comments on July 29, 2009 Public Workshop (posted on Dec 06, 2009).
  • Response to Comments on October 8, 2009 Public Notice Documents (posted on Dec 06, 2009).
  • Revised Tentative Findings (posted on Dec 06, 2009).
  • Revised Tentative Permit Provisions, Part 4 (posted on Dec 06, 2009).
  • Revised Tentative Permit Provisions, Parts 5 and 7 (posted on Dec 06, 2009).
    
    
  • Comments Received During October 8-November 9, 2009 Public Comment Period (posted Nov 18, 2009)
    • City of Hidden Hills
    • City of Los Angeles
    • City of Monrovia, Department of Public Works
    • City of San Fernando
    • City of San Marino
    • City of South El Monte
    • City of Vernon
    • County of Los Angeles
    • County of Los Angeles Flood Control District
    • Joyce Dillard
    • Heal the Bay
    • Los Angeles Stormwater Quality Partnership
    • Rutan, Attorney at Law
    • Ray Tahir
      
      
  • Comment Letters Received in Response to the July 29, 2009 Public Workshop (posted Nov 19, 2009)
    • City of Arcadia
    • City of Artesia
    • City of Bellflower
    • City of Bell Gardens
    • City of Carson
    • City of Claremont
    • City of Commerce
    • City of Downey (7/21/09)
    • City of Downey (7/28/09)
    • City of Duarte
    • City of Gardena
    • City of Inglewood
    • City of LaCanda Flintridge
    • City of Monrovia
    • City of Pico Rivera
    • City of Rosemead
    • City of San Gabriel
    • City of Signal Hill (7/23/09)
    • City of Signal Hill (7/29/09)
    • City of Vernon
    • City of West Covina
    • City of Whittier
    • County of Los Angeles, DPW
    • Charles Abbott Associates, Inc
    • Heal the Bay
    • Los Angeles Stormwater Quality Partnership (LASQP)
    • Richards/Watson/Gershon
    • Santa Monica Baykeeper
    • Rutan, Attorneys at Law
      
      
  • Notice of Public Workshop on Incorporating Provisions of the LosAngeles River Watershed Trash TMDL into the Los Angeles County Storm Water Municipal Permit (posted July 6, 2009)
    
    
    • Staff Presentation for July 29th Public Workshop (posted July 30, 2009)
      
      
  • Current Permit: 2001 Los Angeles County Municipal Permit (Order No. 01-182; NPDES No. CAS0041 as Amended by Regional Order R4-2007-0042 on August 9, 2007)
    
    
  • 2001 LA MS4 Permit: Los Angeles County Municipal Permit (Order No. 01-182; NPDES No. CAS0041)
    
    • Revised Monitoring and Reporting Program (June 15, 2005)
      • Attachment U1
      • Revised Attachment U2
      • Attachment U3
      • Attachment U4 (pdf or word)
        
        
    • Annual Reports
    • Permits Renewal
    • Other related documents
    
    
  • Draft Technical Manuals / Documentation
    • Draft Technical Manual for Storm Water Best Management Practices (BMPs) in the County of Los Angeles, February 2, 2004. Please click on link below to go to the ftp site:
    • Draft Technical Manual (February 2004)
    • Writ Impact
      Impact of peremptory writ of mandate on enrollments under the general industrial and general construction storm water permits, (posted July 17, 2008)
  
  
  • Public notice of proposed changes to the Santa Monica bay shoreline monitoring requirements contained in the monitoring and reporting program under the Los Angeles County Municipal Stormwater Discharge Permit to conform to monitoring requirements of the Santa Monica Bay Beaches Bacterial TMDLs
    • Public Notice
    • Summary of Proposed Changes
      
      
  • Final Regional Board Resolution on the Impacts from Hydromodification on the Water Quality and Beneficial Uses of Water Courses in the Los Angeles Region (02/24/2005)
    
    
  • Storm Water - Administrative Civil Liability (ACL) Complaint for Public Comments
    
    
  • Resources
    • Municipal Storm Water Q&A (January 2002)