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 3939.12 - Total Maximum Daily Load for Bacteria at los Angeles Harbor

Current through Register 2024 Notice Reg. No. 28, July 12, 2024
On July 1, 2004, the Los Angeles Regional Water Quality
					 Control Board (Regional Board) adopted Resolution No. 2004-011 amending the
					 Water Quality Control Plan for the Los Angeles Region (Basin Plan). The
					 amendment revised the Basin Plan by incorporating a Total Maximum Daily Load
					 (TMDL) for bacteria at Los Angeles Harbor (Inner Cabrillo Beach and Main Ship
					 Channel, including the Inner Harbor). The regulatory provisions are added to
					 Chapter 7 of the Water Quality Control Plan.
Numeric targets for this TMDL are expressed as days of
					 exceedance of bacteria objectives contained in the Basin Plan. These targets
					 apply to three seasons: summer dry-weather (April 1 to October 31), winter
					 dry-weather (November 1 to March 31), and wet-weather (days with 0.1 inch or
					 more of rain and the three days following the rain event); and to monitoring
					 sites specified in the Basin Plan.
For nonpoint sources (load allocations), single sample
					 bacterial densities in the Main Ship Channel for any season are zero days of
					 allowable exceedance, and the geometric mean for any season or monitoring site
					 is zero days of allowable exceedance. Single sample bacterial densities for
					 summer dry-weather at Inner Cabrillo Beach are zero days of allowable
					 exceedance. Single sample exceedance days for winter dry-weather and
					 wet-weather seasons for specific monitoring sites at Inner Cabrillo Beach are
					 presented in Basin Plan Table 7-11.2. The geometric mean for any season or
					 monitoring site at Inner Cabrillo Beach is zero days of allowable
					 exceedance.
For point sources (wasteload allocations), single sample
					 bacterial densities for summer dry-weather in the Main Ship Channel are zero
					 days of allowable exceedance. Single sample exceedance days for winter
					 dry-weather and wet-weather seasons for specific monitoring sites in the Main
					 Ship Channel are presented in Basin Plan Table 7-11.2. The geometric mean for
					 any season or monitoring site in the Main Ship Channel is zero days of
					 allowable exceedance. Single sample bacterial densities at Inner Cabrillo Beach
					 for any season are zero days of allowable exceedance, and the geometric mean
					 for any season or monitoring site at Inner Cabrillo Beach is zero days of
					 allowable exceedance.
Discharges from general National Pollutant Discharge
					 Elimination System (NPDES) permits, general industrial storm water permits, and
					 general construction storm water permits are not expected to be a significant
					 source of bacteria. Therefore, the wasteload allocations for these discharges
					 are zero (0) days of allowable exceedances for all three time periods and for
					 the single sample limits and the geometric mean. Any future enrollees under a
					 general NPDES permit, general industrial storm water permit, or general
					 construction storm water permit within the watershed will also be subject to a
					 wasteload allocation of zero days of allowable exceedances.
Resolution No R12-007, Amendment to the Water Quality
					 Control Plan for the Los Angeles Region to Revise the Total Maximum Daily Loads
					 for Bacteria in the Santa Monica Bay Beaches; the Marina del Rey Harbor
					 Mothers' Beach and Back Basins; and the Los Angeles Harbor Inner Cabrillo Beach
					 and Main Ship Channel and to Revise Implementation Provisions for Water Contact
					 Recreation Bacteria Objectives
The basin plan amendment revises Resolution No. 2004-011 by
					 refining allowable exceedances through re-evaluation of the reference system.
					 The amendment further refines the geometric mean implementation provisions in
					 Resolution No. 2002-022 and applies them to this TMDL.
1. Summary
					 of basin plan amendment filed 1-5-2005; amendment approved by State Water
					 Resources Control Board Resolution No. 2004-0071 on 10-21-2004; amendment
					 approved by OAL pursuant to Government Code section
					 11353 on
					 1-5-2005 (Register 2005, No. 1).
2. Amendments to basin plan filed
					 11-7-2013; amendments approved by State Water Resources Control Board 3-19-2013
					 pursuant to Resolution No. 2013-0008; amendments approved by OAL pursuant to
					 Government Code section
					 11353
					 11-7-2013 (Register 2013, No. 45).