California Code of Regulations › Title 23 - Waters › Division 4 - Regional Water Quality Control Boards › Chapter 1 - Water Quality Control Plans, Policies, and Guidelines › Article 4 - Los Angeles Region › Section 3939.17 - A Total Maximum Daily Load for Organochlorine Pesticides, Polychlorinated Biphenyls, and Siltation in Calleguas Creek, Its Tributaries, and Mugu Lagoon

Current through Register 2024 Notice Reg. No. 28, July 12, 2024
On July 7, 2005, the Los Angeles Regional Water Quality
					 Control Board adopted Resolution No. R4-2005-010, amending the Water Quality
					 Control Plan for the Los Angeles Region by establishing a Total Maximum Daily
					 Load (TMDL) for organochlorine (OC) pesticides, polychlorinated biphenyls
					 (PCBs), and siltation in Calleguas Creek, its tributaries, and Mugu Lagoon. The
					 TMDL set numeric concentration-based targets for OC pesticides and PCBs in
					 water, sediment, and/or fish tissue to ensure protection of designated
					 beneficial uses. The specific pollutants addressed are aldrin, chlordane,
					 dacthal, dichlorodiphenyldicloroethane (DDD), dichlorodiphenyldicloroethelyene
					 (DDE), dichlorodiphenyltrichloroethane (DDT), dieldrin, endosulfan I,
					 endosulfan II, endrin, hexachlorocyclohexane (alpha, beta, delta, and gamma
					 BHC), heptachlor, heptachlor epoxide, PCBs, and toxaphene.
Water column targets are derived from California Toxics
					 Rule (CTR) water quality chronic criteria for protection of aquatic life. Fish
					 tissue targets are derived from CTR human health criteria for consumption of
					 organisms. Sediment targets are derived from National Oceanographic and
					 Atmospheric Administration sediment quality guidelines for fresh and marine
					 waters. This TMDL further requires an annual reduction in the import of silt of
					 5,200 tons per year to Mugu Lagoon and preservation of 1,400 acres of existing
					 aquatic habitat in Mugu Lagoon. Targets will be met by limiting discharges from
					 point and nonpoint sources of pollutants.
Interim and final wasteload allocations assigned to point
					 source dischargers will be implemented through National Pollution Discharge
					 Elimination System (NPDES) permits. The TMDL establishes wasteload allocations
					 for five major wastewater treatment plants (Hill Canyon Waste Water Treatment
					 Plant, Simi Valley Water Quality Control Plant, Ventura County (Moorpark) Water
					 Treatment Plant, Camarillo Water Reclamation Plant, and Camrosa Water
					 Reclamation Plant), storm water permittees (California Department of
					 Transportation, general construction, general industrial, and municipal
					 permittees), and to minor point sources.
Interim and final load allocations for nonpoint sources
					 will be implemented through the State's Nonpoint Source Pollution Control
					 Program. Sediment-based load allocations will be measured as an in-stream
					 annual average at the base of each sub-watershed. A Conditional Waiver for
					 Irrigated Lands and/or Agricultural Water Quality Management Plans will be
					 developed to implement load allocations for agricultural dischargers, taking
					 into account TMDL-required studies to assess the effectiveness of Management
					 Practices for reduction of pollutants from agricultural operations.
Special studies and/or monitoring will be conducted as part
					 of this TMDL. The Los Angeles Regional Water Quality Control Board has
					 committed to reconsidering the TMDL, if necessary, based on the collected data
					 or other relevant information. Final wasteload and load allocations must be
					 achieved within 20 years of the effective date of the TMDL.
1. New
					 section summarizing amendments to basin plan filed 1-20-2006; amendment
					 approved by State Water Resources Control Board Resolution No. 2005-0068 on
					 9-22-2005; amendments approved by OAL pursuant to Government Code section
					 11353
					 (Register 2006, No. 3).