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 3939.20 - Total Maximum Daily Load for Metals for Ballona Creek

Current through Register 2024 Notice Reg. No. 28, July 12, 2024
On September 6, 2007, the Los Angeles Regional Water
					 Quality Control Board (Los Angeles Water Board) adopted Resolution No.
					 R2007-015, amending the Water Quality Control Plan for the Los Angeles Region
					 (Basin Plan). This Basin Plan amendment establishes a Total Maximum Daily Load
					 (TMDL) to reduce metals (copper, lead, selenium, and zinc) in Ballona Creek for
					 dry weather (maximum daily flow in the creek less than 40 cubic feet per second
					 (cfs)) and wet weather (maximum daily flow in the creek equal to or greater
					 than 40 cubic feet per second). The TMDL:
(1) sets dry- and wet-weather numeric targets
				  to achieve the California Toxics Rule (CTR) numeric water quality criteria for
				  metals;
(2) establishes a
				  dry-weather loading capacity for a single critical flow to meet dry-weather
				  numeric targets;
(3) establishes a
				  wet-weather loading capacity that varies with flow in order to meet the
				  wet-weather numeric targets; and
(4) allocates the dry- and wet-weather
				  loading capacities among point and nonpoint sources of metals, with most of the
				  capacity allocated to storm water sources.
The principal regulatory mechanisms to implement the TMDL
					 are:
(1) the Los Angeles County
				  municipal separate storm sewer system (MS4) National Pollutant Discharge
				  Elimination System (NPDES) permit,
(2) the Caltrans MS4 NPDES permit,
(3) the general industrial and construction
				  storm water NPDES permits,
(4)
				  "other NPDES permits" for low-volume, intermittent, non-stormwater discharges,
				  and
(5) the authority vested in the
				  Executive Officer by Water Code section
				  13267.
On December 6, 2013, the Los Angeles Regional Water Quality
					 Control Board adopted Resolution No. R13-010, amending the Basin Plan to revise
					 the Total Maximum Daily Loads for Metals in Ballona Creek and the Total Maximum
					 Daily Loads for Toxic Pollutants in the Ballona Creek Estuary
The Basin Plan amendment adopted by Resolution No. R13-010
					 revises the TMDL adopted by Resolution No. 2007-015 by revising allocations
					 based on adjusting the maximum daily flow in the creek from 40 cfs to 64 cfs
					 and adjusting the dry- and wet-weather translators; removing selenium numeric
					 target and allocations from the TMDL; and providing additional flexibility to
					 implement and demonstrate compliance with the TMDL.
1. New
					 section summarizing amendments to basin plan filed 12-9-2005; amendment
					 approved by State Water Resources Control Board Resolution No. 2005-0078 on
					 10-20-2005; amendments approved by OAL pursuant to Government Code section
					 11353 on
					 12-9-2005 (Register 2005, No. 49).
2. Editorial correction of
					 HISTORY 1 (Register 2006, No. 3).
3. Summary of basin plan
					 amendments filed 10-6-2008; amendments adopted by the Los Angeles Regional
					 Water Quality Control Board 9-6-2007 per Resolution No. R2007-015. Approved by
					 the State Water Resources Control Board 6-17-2008 per Resolution No. 2008-0045;
					 approved by OAL 10-6-2008 pursuant to Government Code section
					 11353
					 (Register 2008, No. 41).
4. Summary of basin plan amendment filed
					 5-4-2015; amendment approved by State Water Resources Control Board Resolution
					 No. 2014-0030 on 6-17-2014; amendment approved by OAL pursuant to Government
					 Code section
					 11353 on
					 5-4-2015 (Register 2015, No. 19).