California Code of Regulations › Title 23 - Waters › Division 4 - Regional Water Quality Control Boards › Chapter 1 - Water Quality Control Plans, Policies, and Guidelines › Article 3 - Central Coast Region › Section 3929.13 - Total Maximum Daily Loads for Toxicity and Pesticides in the Santa Maria River Watershed

Current through Register 2024 Notice Reg. No. 28, July 12, 2024
The Regional Water Quality Control Board, Central Coast
					 Region (Central Coast Water Board) adopted Resolution No. R3-2014-0009 on
					 January 30, 2014, amending the
Water Quality Control Plan for the
					 Central Coast Region
(Basin Plan). The State Water Resources Control
					 Board approved the amendment under Resolution No. 2014-0033 on July 2,
					 2014.
Resolution No. R3-2014-0009 establishes toxicity and
					 pesticide Total Maximum Daily Loads (TMDLs) and an implementation plan for the
					 Santa Maria River watershed. The TMDLs address impairments in the Santa Maria
					 River Watershed (including Blosser Channel, Bradley Canyon Creek, Bradley
					 Channel, Greene Valley Creek, Little Oso Flaco Creek, Main Street Canal, Orcutt
					 Creek, Oso Flaco Creek, Oso Flaco Lake, and the Santa Maria River) due to
					 unknown toxicity, sediment toxicity, and elevated levels of pesticides. The
					 impairments are based on surface waters not meeting the Basin Plan narrative
					 water quality objectives for toxicity and pesticides. The TMDL establishes
					 numeric toxicity and pesticide targets.
Responsibility for achieving waste load allocations and
					 load allocations falls upon several entities as described in Table 11 of the
					 Basin Plan Amendment. An implicit margin of safety is utilized in the TMDL to
					 account for uncertainties. The Water Board is relying on existing regulatory
					 measures (i.e., the Agricultural Order and storm water permits) to ensure
					 implementation actions are carried out by implementing parties, as well as
					 utilizing a Management Agency Agreement and pesticide management plan between
					 the California Department of Pesticide Regulation, the State Water Resources
					 Control Board, and the Central Coast Water Board to address impairments.
Milestones are established for achieving the TMDLs and the
					 Central Coast Water Board will track progress towards achieving the TMDLs
					 through review of implementation actions and monitoring conducted by the
					 implementing parties. Water Board staff will conduct triennial reviews of
					 implementation actions and monitoring results. If existing efforts are not
					 expected to achieve the TMDLs as scheduled (as determined by triennial
					 reviews), the Executive Officer or the Water Board may require changes to
					 existing monitoring, reporting, or implementation efforts pursuant to
					 California Water Code Sections
					 13263,
					 13267 or
					 13383.
1. New
					 section summarizing amendments to basin plan filed 10-29-2014; amendments
					 approved by State Water Resources Control Board Resolution No. 2014-0033 on
					 7-2-2014; amendments approved by OAL pursuant to Government Code section
					 11353 on
					 10-29-2014 (Register 2014, No. 44).