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 3939.42 - A Total Maximum Daily Load for Pesticides and Polychlorinated Biphenyls in Machado Lake

Current through Register 2024 Notice Reg. No. 28, July 12, 2024
On September 2, 2010, the Los Angeles Regional Water
					 Quality Control Board adopted Resolution No. R10-008, amending the Water
					 Quality Control Plan for the Los Angeles Region by establishing a Total Maximum
					 Daily Load (TMDL) for Pesticides and Polychlorinated Biphenyls (PCBs) in
					 Machado Lake. The TMDL includes numeric targets for sediment based on the
					 freshwater Threshold Effect Concentration sediment quality guidelines compiled
					 by the National Oceanic and Atmospheric Administration, for the water column
					 based on California Toxics Rule criteria for protection of human health, and
					 for fish tissue based on the Fish Contaminant Goals issued by the Office of
					 Environmental Health Hazard Assessment. The TMDL waste load allocations for
					 point source discharges and load allocations for nonpoint source discharges are
					 established to attain the TMDL numeric targets. The TMDL waste load allocations
					 are for discharges from the watershed to Machado Lake and load allocations are
					 for internal sources of pesticides and PCBs from the lake sediments.
The regulatory mechanisms used to implement the TMDL waste
					 load allocations include the Los Angeles County municipal separate storm sewer
					 system (MS4) permit, the Caltrans stormwater permit, the general industrial
					 stormwater National Pollutant Discharge Elimination System (NPDES) permit, the
					 general construction stormwater NPDES permit, and other non-stormwater NPDES
					 permits. Nonpoint sources may be regulated through a Memorandum of Agreement
					 (MOA) between the responsible parties and the Regional Board Executive Officer.
					 The MOA shall comply with the
Water Quality Control Policy for
					 Addressing Impaired Waters: Regulatory Structure and Options
("Policy"), including part II section
					 2 c ii and related provisions. The
					 implementation of the MOA must result in attainment of the TMDL load
					 allocations. If the MOA does not result in the attainment of the TMDL load
					 allocations, the MOA will be rescinded and the load allocations shall be
					 implemented through a cleanup and abatement order.
The TMDL requires dischargers to attain the waste load and
					 load allocations by September 30, 2019. The TMDL requires responsible parties
					 for the waste load allocations to submit a monitoring and reporting plan within
					 six months of the effective date of the TMDL. The TMDL requires responsible
					 parties for the load allocations to enter into an MOA with the Regional Board
					 within one year of the effective date of the TMDL and to submit a Lake Water
					 Quality Management Plan within one and one half years of the effective date of
					 the TMDL.
1. New
					 section summarizing amendment to basin plan filed 2-29-2012; amendment approved
					 by State Water Resources Control Board Resolution No. 2011-0065 on 12-6-2011;
					 amendment approved by OAL pursuant to Government Code section
					 11353 on
					 2-29-2012 (Register 2012, No. 9).