Amendment to the Water Quality Control Plan for the San Diego Basin to Incorporate Site-Specific Water Effect Ratios into Water Quality Objectives for Toxic Pol
2 Documents in Project
Summary
SCH Number
2019100661
Lead Agency
California Regional Water Quality Control Board, San Diego Region 9
(RWQCB)
Document Title
Amendment to the Water Quality Control Plan for the San Diego Basin to Incorporate Site-Specific Water Effect Ratios into Water Quality Objectives for Toxic Pol
Document Type
NDE - Notice of Decision
Received
Posted
3/11/2020
Document Description
The project is an amendment to the Water Quality Control Plan for the San Diego Basin (Basin Plan), including Total Maximum Daily Loads (TMDLs) for dissolved copper and dissolved zinc in Chollas Creek. The project/amendment consists of 1) an update to clarify the application of water effect ratios (WERs) in the California Toxics Rule (CTR) for developing site-specific water quality objectives (WQOs) (Chapter 3), 2) an update to apply site-specific WERs to dissolved copper and dissolved zinc in Chollas Creek during wet weather (Chapter 3), and 3) an update to revise WER values and associated water quality criteria calculations (Chapter 7). This project/amendment takes the site-specific conditions/WER into account to achieve the intended level of ecosystem protection without being overly conservative.
Contact Information
Name
Melissa Corona
Agency Name
San Diego Regional Water Quality Control Board
Contact Types
Lead/Public Agency
Phone
Location
Counties
San Diego
Notice of Determination
Approving Agency
San Diego Regional Water Quality Control Board
Approving Agency Role
Lead Agency
Approved On
Determinations
(1) The project will have a significant impact on the environment
N/A
(2a) An Environmental Impact Report was prepared for this project pursuant to the provisions of CEQA
No
(2b) A Mitigated or a Negative Declaration was prepared for this project pursuant to the provisions of CEQA
No
(2c) An other document type was prepared for this project pursuant to the provisions of CEQA
No
(3) Mitigated measures were made a condition of the approval of the project
N/A
(4) A mitigation reporting or monitoring plan was adopted for this project
N/A
(5) A Statement of Overriding Considerations was adopted for this project
N/A
(6) Findings were made pursuant to the provisions of CEQA
N/A
Attachments
Environmental Document
Notice of Determination
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