California Code of Regulations › Title 23 - Waters › Division 4 - Regional Water Quality Control Boards › Chapter 1 - Water Quality Control Plans, Policies, and Guidelines › Article 5 - Central Valley Region › Section 3943 - Amendment to the Water Quality Control Plan for the Sacramento River and San Joaquin River Basins for the Control of Agricultural Subsurface Drainage Discharges

Current through Register 2024 Notice Reg. No. 28, July 12, 2024
The Central Valley Regional Water Quality Control Board
					 adopted Resolution Number 96-147 on May 3, 1996 and revised under Resolution
					 Number R5-2010-0046 and Amendment to the Water Quality Control Plan for the
					 Sacramento River and San Joaquin River Basins for the Control of Agricultural
					 Subsurface Drainage Discharges. The amendment and its revisions to the Water
					 Quality Control Plan for the Sacramento River and San Joaquin River Basins
					 modifies the regulatory provisions of the previous Water Quality Control Plan
					 as follows:
1. Surface Water
				  Beneficial Uses -- Beneficial Uses were added to Mud Slough (north), Salt
				  Slough and listed wetland supply channels, including a "Limited Beneficial Use"
				  for Mud Slough (north) and the wetland supply channels.
2. Water Quality Objective for Selenium -- A
				  Water Quality Objective for selenium and schedule of compliance has been added
				  and the schedule has been revised for Mud Slough (north) and the San Joaquin
				  River. The revision includes a new interim performance goal. A selenium Water
				  Quality Objective has also been added for Salt Slough and listed water supply
				  channels in the Grasslands watershed.
3. Agricultural Discharge Prohibitions -- The
				  discharge of agricultural subsurface drainage from the Grasslands Watershed to
				  the San Joaquin River is prohibited unless such discharge began prior to the
				  effective date of this amendment, or is regulated by Waste Discharge
				  Requirements. Selenium discharge from the Grasslands Watershed to the San
				  Joaquin River is prohibited in amounts exceeding 8,000 lbs/yr, and is
				  prohibited in Mud Slough (north) and the San Joaquin River from the Mud Slough
				  confluence to the Merced River after December 31, 2019 unless Water Quality
				  Objectives for selenium are being met. The discharge of agricultural subsurface
				  drainage to the San Joaquin River from Sack Dam to Mud Slough (north) is
				  prohibited after October 1, 2010 unless Water Quality Objectives for selenium
				  are being met. The discharge of agricultural subsurface drainage water to Salt
				  Slough and the wetland water supply channels is prohibited unless Water Quality
				  Objectives for selenium are being met. The prohibition becomes effective
				  immediately upon Board determination that timely and adequate mitigation, as
				  outlined in the 2010-2019
Agreement for Continued Use of the San Luis
				  Drain
has not been provided.
4. Control Actions -- Performance goals and
				  effluent limits established in Waste Discharge Requirements will be used to
				  measure progress toward achievement of Water Quality Objectives for
				  selenium.
1. New
					 section summarizing amendments to Basin Plan filed 1-10-97; Basin Plan
					 amendment adopted by the Central Valley Regional Water Quality Control Board
					 5-3-96 per Resolution No. 96-147 and approved by the State Water Resources
					 Control Board 9-19-96 per Resolution No. 96-078, approved by OAL and effective
					 per Government Code section
					 11353 on
					 1-10-97 (Register 97, No. 2).
2. Amendment of section summarizing
					 amendments to Basin Plan filed 12-15-2010; amendment approved by State Water
					 Resources Control Board Resolution No. 2010-0046 on 10-5-2010; amendment
					 approved by OAL on 12-15-2010 pursuant to Government Code section
					 11353
					 (Register 2010, No. 51).