Basin Plan Amendment - Technical Documentation


2004 Triennial Review

The Water Quality Control Plan for the Los Angeles Region (also known as the Basin Plan) contains water quality standards for the Los Angeles Region. In California, water quality standards include designated beneficial uses for surface and ground waters, narrative or numeric water quality objectives to protect those beneficial uses, and a policy to maintain high quality waters (i.e., antidegradation policy). Basin Plans also include implementation plans for water quality objectives, through various regulatory programs. Basin Plans fulfill statutory requirements for water quality planning in California Water Code (CWC) section 13240 and the federal Clean Water Act (CWA) section 303(c). Both State and federal laws mandate the periodic review, and if necessary, update of Basin Plans. Federal law [CWA section 303(c)(1)] requires that a State’s water quality standards be reviewed every three years – a process known as a triennial review. The primary purpose of the Triennial Review is to review water quality standards and take public comment on issues the Regional Board should address in the future through the Basin Plan amendment process. The Triennial Review is not a Basin Plan amendment, but rather a work plan for upcoming Basin Plan amendments. During the Triennial Review process the Regional Board develops and adopts a prioritized list of Basin Planning issues that it determines should be investigated over the next three years. This list of priorities is then transmitted to the State Board and the US EPA.

    1. Staff Report
    2. Tables - Basin Planning Priorities
    3. Appendix A - Tentative Resolution
    4. Appendix B - 2001 Triennial Review Priorities
    5. Appendix C - Preliminary 2004 Triennial Review Priorities List
    6. Appendix D - Summaries of Stakeholder Input
    7. Response to Public Comments, January 21, 2005
    8. Response to Public Comments, February 18, 2005
    9. Final Resolution, March 3, 2005

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