California Code of Regulations
Title 23 - Waters
Division 4 - Regional Water Quality Control Boards
Chapter 1 - Water Quality Control Plans, Policies, and Guidelines
Article 8 - Santa Ana Region
Section 3974 - Establishment of a Total Maximum Daily Load for Nutrients in the Newport Bay/San Diego Creek Watershed

Universal Citation: 23 CA Code of Regs 3974

Current through Register 2024 Notice Reg. No. 38, September 20, 2024

Regional Board Resolution Nos. 98-09 and 98-100, adopted by the Santa Ana Regional Water Quality Control Board (SARWQCB) on April 17, 1998, and October 9, 1998, respectively, modified the regulatory provisions of the Water Quality Control Plan for the Santa Ana Region by establishing a total maximum daily load (TMDL) for nutrients (e.g.; nitrogen and phosphorous) discharged in the Newport Bay/San Diego Creek watershed (Watershed). The TMDL specifies daily, seasonal, and/or annual targets and specific land use load allocations for nutrients in the Watershed and total nitrogen load allocations for San Diego Creek (Reach 2). Phase 1 of the TMDL provides compliance schedules for:

(1) review and revision of water quality objectives,

(2) establishment of new waste discharge requirements,

(3) revision of existing waste discharge requirements,

(4) establishment of a nutrient management program for agricultural activities, and

(5) co-permittees of the urban stormwater permit to submit:

(a) an analysis of best management practices (BMPs) to achieve short-term (5-year) interim targets and final nutrient load reduction targets through the Drainage Area Management Plan (DAMP) and

(b) a proposal for evaluating the effectiveness of implemented, control actions and compliance with nutrient load allocations. The sediment TMDL is incorporated by reference as the implementation plan for achieving the phosphorus loading reduction specified in the nutrient TMDL. Phase 2 of the TMDL provides specific monitoring requirements and methods for reassessment of the TMDL. Programs and activities required by the TMDL must be approved by the SARWQCB at a duly noticed public hearing as per Chapter 1.5, Division 3, Title 23 of the California Code of Regulations (Section 647 et seq.). These programs and activities are:
(1) the agricultural nutrient management plan;

(2) the proposal and analysis of BMPs to be implemented through the DAMP; and

(3) the Phase 2 regional monitoring program.

1. New section filed 2-10-99; basin plan amendment regulatory provisions approved by OAL and effective 2-10-99 pursuant to Government Code section 11353 (Register 99, No. 7).

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